Madhya Pradesh SOR 2023
Salt Glazed Stoneware Pipes, Sewer Appurtenances & Sewerage Maintenance rates
126 salt glazed stoneware pipes, sewer appurtenances & sewerage maintenance items from the Madhya Pradesh Public Health Engineering Department (PHED), effective 2023-09-01.
Salt Glazed Stoneware Pipes, Sewer Appurtenances & Sewerage Maintenance rates in the Madhya Pradesh Unified Schedule of Rates 2023 run from ₹9.00 to ₹16,854.00. Transcribed from Madhya Pradesh PHED — Unified Schedule of Rates for Water Supply, Sewerage and Allied Works, in force from 1 September 2023. Reference only — verify against the official source before pricing a bid.
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126 items — scroll the table to browse
| Description | Unit | ||
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| 29.9.1 | This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES - 2. Sewer Appurtenance Following are the General Sewer Appurtenances- 1) Manholes II) Inverted Syphon III) Storm Water Inlets V) Sewer Ventilators Out of the above, manholes are the most essential items in any sewerage system 1. Manhole 1.1 Function Manholes is the essential ancillary structure in any sewerage system. They shall be provided for inspection, testing, cleaning, repairing and removal of obstruction from sewer line. 1.2 Provision:- Manholes should be built at every change of alignment, gradient or diameter, at the head of all sewer and branches and at every junction of two or more sewers, on sewer, which is to be cleaned manually or which cannot be entered for cleaning or inspection. 1.3 Spacing:- The Maximum spacing of manholes in the sewer shall be kept as follows: - Pipe dia (mm) Max. Spacing (mt) Upto 900 30 900 to 1500 90 - 150 1500 to 2000 150 - 200 Above 2000 300 A spacing allowance of 100m per 1m dia of sewer is a general rule in case of very large sewers 1.4 Types of manholes: Following is the general classification of manholes- 1.4.1 Straight-through manholes:- The simplest type of manhole is that built on a straight run of sewer with no side junctions. Where there is a change in the size of sewer, the soffit or crown level of the two sewers should be the same, except where special conditions require otherwise. 1.4.2 Junction Manholes:- A manhole should be built at every junction of two or more sewers, and the curved portions of the inverts of tributary sewers should be formed within the manhole. To achieve this with the best economy of space, the chamber may be built of a shape other than rectangular. The soffit of the smaller sewer at a junction should be not lower than that of the larger sewer, in order to avoid the surcharging of the former when the letter is running full, and the hydraulic design usually assumes such a condition. The gradient of the smaller sewer may be increased from the previous manhole sufficiently to reduce the difference of invert level at the point of junction to a convenient amount. 1.4.3 Side Entrance Manholes:- In large sewer or where it is difficult to obtain direct vertical access to the sewer from ground level, owing to existing services, gas, water etc. the access shaft should be constructed in the nearest convenient position off the line of sewer, and connected to the manhole chamber by a lateral passage. In the tunnelled sewer the shaft and the lateral access heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading maybe constructed after the main tunnel is completed, provision having been made for breaking in from the access heading to build the chamber. The floor of the side- entrance passage, which should fall at about 1 in 30 towards the sewer, should enter the chamber not lower than the soffit level of the sewer. In large sewer where the floor of the side entrance passage is above the soffit either steps or a ladder (which should be protected either by a removable handrail or by safety chains) should be provided to reach the benching. 1.4.4 Drop Manholes:- When a sewer connects with another sewer, where the difference in level between water lines (peak flow levels) of main line and the invert level of branch line is more than 600 mm or a drop of more than 600 mm is required to be given in the same sewer line and it is uneconomical or impractical to arrange the connection with in 600 mm a drop connection shall be provided for which is manholes maybe built incorporating a vertical or nearly vertical drop pipe from the higher sewer to the lower one. This pipes maybe either outside the shaft and enclosed in concrete or supported on brackets inside the shaft, which should be suitably enlarged. If the drop pipe is outside the shaft, a continuation of the sewer should be built through the shaft wall to from a rodding and inspection eye, which should be provided with a half blank flange. If the drop pipe is inside the shaft. It should be in cast iron and it would be advantage ous to provide adequate means for rodding and water cushion of 150 mm depth should also be provided. The diameter of the backdrop should be at-least as large as that of the incoming pipe. The drop pipe should terminate at its lower end with a plain or duck-foot bend turned so as to discharge its flow at 45 degree or less then to the direction of the flow in the main sewer and the pipe, unless of cast iron, should be surrounded with 150 mm of concrete. In the case of sewer over 450 mm in diameter the drop in level may be accomplished by one of the following methods: - (a) A cascade: - This is a steep ramp composed of steps over which the flow is broken up and retarded. A pipe connecting the two levels is often concreted under the steps to allow small flow to pass without trickling over the steps. The cascade steps maybe made of heavy-duty bricks of class- I quality (IS: 2180- 1985) cement concrete with granolithic finish or dressed granite. (b) A Ramp: - A ramp maybe formed by increasing the grade of the last length of the upper sewer to about 45 degrees or by constructing a steeply graded channel or culvert leading from the high level to the low level sewer. In order to break up the flow down the ramp and minimize the turbulence in the main sewer the floor of culvert ramp should be obstructed by raced transverse ribs of either bricks or concrete at 1.50m intervals and a stilling pool provided at the bottom of the ramp and. (c) By drop in previous successive manholes instead of providing the total drop require at the junction manholes, the same may be achieved by giving smaller deeps in successive manhole preceding the junction manhole. Thus for example, if a total drop of 2.4m is required to be given, 0.6m drop maybe given in each of the previous three manholes and the last 0.6m-drop maybe given at the junction manhole. 1.4.5 Scraper (Service) Type Manhole:- All sewers above 450mm diameter should have manhole at intervals for 110 to 120 m of scraper type. This manhole should have clear opening of 1200 x 900 mm at top to facilitate lowering of buckets. 1.4.6 Flushing manholes:- Where it is not possible to obtain self-cleaning velocities due to flatness of the gradient specially at the top end of branch sewer which receive very little flow, it is essential that same form of flushing device be incorporated in the system. This can be done by making grooves at intervals of 45 to 50m in the main drains in which wooden planks are inserted & water allow to head up and which will rush on with great velocity when the planks are removed. Alternatively, an overhead water tanks is built, from which connection are made through pipe flushing hydrants to rush water to the sewer. The relevant Indian standard is IS:4111(part two). Flushing can be very conveniently accomplished by use of fire hydrant or tanker. Where flushing manhole is provided, they are located generally at the head of a sewer. Sufficient velocity shall be imparted in the sewer to wash away the deposited solid. The flush is usually effective up to a certain distance after which the imparted velocity gets dissipated. The automatic systems which are operated by mechanical units gets often corroded by the sewer gases and do not generally function satisfactorily and hence are not recommended. In case of hard chock ages in sewers, care should be exercised to be ensuring that there is no possibility or back flow of sewer into the water supply mains. Approximate quantities of water needed for flushing are as follows: - 200mm dia 250mm dia 300mm dia 1. 0.00502300 2500 3000 2. 0.00751500 1800 2300 3. 0.01001300 1500 2000 4. 0.0200500 800 1000 5. 0.0300400 500 700 2. Constructional Details:- Manhole is usually constructed directly over the centre line of the sewer they are usually constructed with brickwork. However in areas where sewers are to be laid in high water condition manhole shall be constructed in R.C.C. They are circular, rectangular or square in shape. Manholes should be of such size as will allow necessary cleaning and inspection of manholes. (a) Rectangular Manholes - The minimum internal sizes of rectangular manholes between brick face should be as follows: (i) For depth of manholes less than 0.9m, 900mm x 800mmand (ii) For depths of manholes from 0.9mm&upto 2.5m, 1200mmx 900mm (b) Arch type manholes - For depth of 2.5m and above, arch type manholes can be provided and the internal size of the chambers between brick faces shall be 1400mm x 900mm. The width of manhole chamber on bents and junction of pipes with diameter greater than 450mm should be suitably increased to 900mm or more so that benching width on either side of the channel to be at-least 200mm. 3. Circular manholes- Circular manholes are longer than rectangular and arch type manhole and thus there are preferred over rectangular as well as arch type manholes. The circular manholes can be provided for all depths starting from 0.9m circular manholes are straight down in lower portion and slanting in top portion so as to narrow down the top opening equal to internal dia. of manhole over. Depending upon the depth of manhole, the diameter of manhole changes. The internal diameter of circular manholes may be kept as following for verifying depths. (i) For depths 0.9m and up to 1.65mm, 900mm diameter (ii) For depths above 1.65m and up to 2.30m, 1200mm diameter (iii) For depths above 2.30m and up to 9.0m, 1500mm diameter. (iv) For depths above 9.0m and up to 14.0m, 1800mm diameter. Typical circular manholes are shown in fig.6 If the sewer is constructed in a tunnel, the manhole should be located at the access or working shaft and the manhole chamber maybe constructed of a size to suit the working shaft or vice-versa. The width /diameter of the manhole should not be less than internal diameter of the sewer +150mm benching as both sides (150mm+ 150mm) The opening for entry into the manhole (without cover) should be such minimum diameters as to allow a workman with the cleaning equipments into the interior of the manhole without difficulty. A minimum clear opening of 60cm preferably circular is recommended. Suitable steps usually cast iron shall be provided for entry. Access shaft for large sewers - Access shaft shall be circular in shape and shall have a minimum internal dia of 750mm, where the depth of the shaft exceeds 3m suitable dimensions shall be provided to facilitate cleaning and maintenance. Access shaft where built of brick work should be corbelled on three sides to reduce it to the size of the opening in the cover frame, and to provide easy access on the fourth side to step iron or ladder.In determining sizes the dimensions of the maintenance equipments likely to be used in sewer, shall be kept in view. Where the diameter of the sewer is increased, the crown of the entering leaving pipes shall be fixed at the same level and necessary slopes given in the inverted of the manholes chamber. In exceptional cases and where unavoidable the crown of the entering sewer maybe fixed at lower level but in each cases too the peak flow level of the two sewer shall be kept the same. A slab generally of plain cement concrete at least 150mm thick should be provided at the base to support the walls of the manhole and to prevent the entry of foul water. The thickness of the base also shall be suitably increased up to 300mm, for manholes on large dia sewers, with adequate reinforcement provided to withstand excessive uplift pressures. In the case of larger manholes, the flow in the sewer should be carried in U-Shaped smooth channelconstructed integrally with the concrete base of the manhole. The side of the channel should be equal to the dia. of the largest sewer pipe.The adjacent floor should have a slope of 1 in 10 draining to the channel. Where more than one sewer enters the manhole the flow through channel should be curved smoothly and should have sufficient capacity to carry the maximum flow. It is desirable to place the first pipe joint outside the manhole as close as practicable. The pipe shall be built inside the wall of the manhole flush with the internal periphery protected with an arch of masonry or cement concrete to prevent it from being crushed. The sidewalls of the manhole are usually constructed of cement brickwork 250mm thick and corbelled suitably to accommodate the frame of the manhole cover. The inside and outside of the brickwork should be plastered with cement mortar 1:3 (1 cement: 3 coarse sand) and inside finished smooth with a coat of neat cement. Where subsoil water condition exist, a richer mix may be used and it shall further be water proofed with addition of approved water proofing compound in a quantity as per manufacturer's specifications. 4. Covers and frames: The size of manhole covers should be such that there should be clear opening of not less than 560mm diameter for manholes exceeding 0.9m depths. When cast iron manhole covers and frames are used they shall conform to IS 1726 (parts 1 to 7). The frames of manhole shall be firmly embedded to correct alignment and level in plain concrete on the top of masonry. After completion of the work, manhole covers shall be sealed by means of thick grease. Where sewer are to be laid in high subsoil water conditions, manholes maybe constructed in R.C.C. of grade M 20 or 1:1.5:3. The manholes in this type of construction shall be preferably circular. Heavy reinforced concrete covers with suitable lifting arrangements could also be used instead of C.I manhole covers. However pre-cast cement concrete covers reinforced by materials other than mild steel should be used provided that those are properly tested & certified for use by competent authority. Fibre reinforcement plastic covers (FRP) conforming to relevant IS: may be used wherever such covers are available. 5. Inverted Syphon 5.1 Function and provision In the course of laying sewers, at times it is found necessary to cross obstructions like nallah etc. Such obstruction shall be crossed by means of "Inverted Syphon” i.e. by laying the sewer under the obstruction and regaining as much elevation as possible after the obstruction is passed. As the siphons are depressed below the hydraulic grade line, maintenance of self cleaning velocity at all flows is very important. Two considerations, which govern the profile of a siphon, are provision for hydraulic losses and case of cleaning. 5.2 Construction To ensure self-cleaning velocities for the wide variations in flows, generally, two or more pipes not less than 200mm dia are provided in parallel so that up to the average flows, first pipe is used and when the flow exceeds the average, the second and subsequent pipes take the balance flow. Siphons may need cleaning other than gravity sewers and hence should not have any sharp bends either horizontal or vertical. Only smooth curves of adequate radius should be used. The design criteria for inverted siphons are given in IS: 411 part -III. It is necessary to have a self-cleaning velocity of 1.0 mps for the minimum flow to avoid deposition in the line. Provision should be made for isolating the individual pipes as well as the syphon to facilitate cleaning. It is desirable to provide a course screen to prevent the entry of rags etc, into the syphon. 5.3 Inlet and outlet chambers:- In the multiple pipe syphon, the inlet should be such that the pipes coming to action successively as the flow increases. This may be achieved by providing lateral with heights kept in accordance with the depth of flow at which one or more siphon pipes functions. In the two-pipe siphon, the first should take 1.25 to 1.5 times the average flow and second should take the balance of the flow. A manhole at each end of the siphon should be provided with clearance for rodding. The design of inlet and outlet chambers should allow sufficient room for entry for cleaning and maintenance of siphons. The outlet chambers should be so designed as to prevent the flow of sewage into pipes, which are not being used at the time of minimum flow. 6. Hatch box: Hatch boxes of adequate size in manholes shall be provided on the pipes so as to give access into the pipes for rodding. 7. By pass: Proper by pass arrangements should be provided from the inlet chamber and if required special arrangements should be made for pumping the sewage to the lower reach of sewer line. Alternatively a vacuum pump maybe provided at the outlet to overcome maintenance problems arising out of dogging and silting of siphons. If it is possible a blow off may be installed at the low point to facilitate emergency maintenance operations. 8. Storm water inlets:- There are device meant to admit the surface runoff to the sewers and form a very important part of the systems. Their location and design should therefore be given careful considerations. Storm water inlets maybe categorised under three major groups viz. curb inlets, gutter inlets and combination inlets, each being either depressed or flush depending upon their elevation with reference to the pavement surface. The actual structure of an inlet is usually made of brickwork. Normallycast-iron gratings conforming to IS: 5961 shall be used. In case there is no vehicular traffic, fabricated steel gratings maybe used. The clear opening shall not be more than 25mm. The connecting pipe from the street inlet to the main street sewer should not be less than 200mm in dia. and should have sufficient slope. Maximum spacing of inlets would depend upon various conditions of road surface, size and type of inlet and rainfall. A maximum spacing of 30m is recommended. 9. Sewer ventilators:- In a modern, well designed sewerage system, there is no need to provide ventilation on such elaborate scale considered necessary in the past, especially with the present day policy to omit intercepting traps in house connections. The ventilating columns/shafts are not necessary where intercepting traps are not provided. It is necessary however, to make provision for the escape of air to take care of the exigencies of full flow and also to keep the sewage as fresh as possible especially in out fall sewers. In case of storm sewers providing ventilating manhole covers can do these. 9.1 Provision: Ventilating columns/ shafts shall be provided at an internal of 180m in all mains intercepting and outfall sewers, near the manholes. The connections of house drains to the sewer shall be allowed without the use of any intercepting trap and thus permitting ventilation of laterals and branch sewers via. House drains and their ventilating pipes. 9.2 Construction: - The ventilating shaft shall consist of vertical columns of R.C.C. or cast iron about 6 to 8 metre in height and about 100 to 150mm in diameter (opening) at the top, the diameter increasing uniformly towards the bottom for stability. The shaft shall be provided with a Crowell or fitted with a wire ground at the top. 10. This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES- 3. Sewerage Maintenance 1 Contractor is bound to follow the guide line of CPHEEO manual on sewerage & sewage treatment system (Part-B) issued by Ministry of Urban Development, New Delhi w.e.f. November 2013. 2 The tools, plant, machinery and pumps required for cleaning should be arranged by the contractor at his own cost. 3 The payment will be made after successful testing of line only. No payment will be made for testing work in pieces. 4 No payment will be made for dewatering whatsoever involve in cleaning of manhole & sewer line. The payment of Dat (temporary plugging of chambers) will be made for cleaning of chamber only in accordance with volume of pipes, manholes and drains. The rates of Dat are included in the SOR. 5 The manhole cover for replacement will be issued from the store & no extra payment will be made for loading, unloading and transportation of manhole cover with frame upto the work site. 6 The contractor shall be fully and solely responsible for making all safety arrangements pertaining to the work such as barricading, lighting, arrangement of gas masks, safety belts and oxygen cylinder etc. 7 Shifting of silt and garbage will be done as per the direction of the Engineer- incharge. 8 Providing and fixing of CI/SFRC manhole cover with frame may be replaced (if required) but the cover shall be as per ISI mark only. The payment will be made as per rates applicable in the USOR. 9 The rates for various works given in the unified schedule of rates include contractor profit over head expenses, water and T&P expenses. 10 Some poisonous & inflammable gases are observed in deep sewers manholes, to prevent any disaster due to trance gases, the safety of cleaning staff is the responsibility of the contractor. 11 The department is not responsible for any accident during cleaning of sewer line. The contractor is fully responsible for any compensation to labour or for any legal action arising due to the accident. 12 This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates based on this USOR will include GST as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. SALT GLAZED STONEWARE PIPES, SEWER APPURTENANCES 1. Salt Glazed Stoneware Pipes Rate 29.1 Providing and Laying and Jointing salt glazed stone ware (S.W.) pipes socket and spigot with stiff cement mortar 1:1 including testing of joints complete. 29.1.1 100 mm Meter 388.00 29.1.2 150 mm Meter 558.00 29.1.3 200 mm Meter 893.00 29.1.4 250 mm Meter 1342.00 29.1.5 300 mm Meter 1795.00 29.2 Labour only for Laying and Jointing salt glazed stone ware (S.W.) pipes S&S (socket and spigot) with stiff cement mortar 1:1 including testing of joints complete. 29.2.1 100mm Meter 84.00 29.2.2 150 mm Meter 121.00 29.2.3 200 mm Meter 143.00 29.2.4 250 mm Meter 194.00 29.2.5 300 mm Meter 225.00 29.3 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sand: 10 graded stone aggregate 40 mm nominal size) around S.W. pipe including bed concrete 15 cm thick i/c curing, testing etc. complete for 100 mm dia. to 300 mm dia pipe. (For type "Concrete Around") 29.3.1 100mm dia SW pipe Meter 282.00 29.3.2 150mm dia Meter 456.00 29.3.3 200mm dia Meter 536.00 29.3.4 250mm dia Meter 624.00 29.3.5 300mm dia Meter 720.00 29.4 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sa`nd: 10 graded stone aggregate 40 mm nominal size) up to haunches of SW – pipes including bed concrete i/c curing, testing etc complete for 100mm to 300mm dia SW pipe For Type "Concrete up to Haunches ") 29.4.1 100mm dia pipe Meter 592.00 29.4.2 150mm dia Meter 724.00 29.4.3 200mm dia Meter 844.00 29.4.4 250mm dia Meter 976.00 29.4.5 300mm dia Meter 1121.00 29.5 Dismantling of old S.W. pipes including breaking of Rate joints and bed concrete stacking of useful materials near the site within 50 m lead and disposal of unserviceable materials in to municipal dumps: 29.5.1 100mm dia pipe Meter 36.00 29.5.2 150mm dia Meter 39.00 29.5.3 200mm dia Meter 42.00 29.5.4 250mm dia Meter 44.00 29.5.5 300mm dia Meter 47.00 2. Sewer Appurtenances Rate 29.6 Providing and fixing SW gully trap complete with CI grating, Brick masonry chamber in cement mortar 1:4 (1 cement: 4 fine sand) water tight CI cover with frame of 30x30cm size including necessary Excavation, cement concrete grade M-5 (Nominal Mix) with stone aggregate 40mm nominal size, fixing CI cover with frame in Cement concrete grade M-15 (Nominal Mix) with stone aggregate 20mm nominal size, 12 mm thick cement plaster 1:2 (1 cement: 2 coarse sand ) finished with a floating coat of neat cement complete. 29.6.1 100x100mm size "P" Gully Trap Chamber Each 2085.00 29.6.2 125x100mm size "p", "Q" or "S" type Gully trap chamber Each 2059.00 29.6.3 180x150mm size "P" or "S" type Each 2114.00 29.7 Constructing Brick Masonry Manhole in Cement Mortar 1:4 (1 cement: 4 fine sand) R.C.C. top slab 1:1.5:3 (1 cement: 1.5 coarse sand: 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:4:8 mix (1cement: 4 coarse sand: 8 graded stone aggregate 40mm nominal size) inside plastering 12mm thick with cement mortar 1:3 (1cement: 3 fine sand) finished with a floating coat of neat cement and making channels in CC 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size) including finishing the channel to shape, curing etc. (Excavation foot rest and external cement plaster shall be paid for separately) 29.7.1 Inside size 90x80 cm and 45 cm deep including CI cover with frame 455x610 mm internal dimensions Each 10457.00 total weight of cover and frames to be not less than (23+15) 38 kg. 29.7.2 Inside size 90x80 cm and 60 cm deep including CI Each 11501.00 Rate cover with frame 455x610mm internal dimensions total weight of cover and frames to be not less than (23+15) 38 kg 29.7.3 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (medium duty) 500mm Each 25628.00 internal diameter total weight of cover and frame to be not less than (58+58) 116 kg. 29.7.4 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (Heavy duty) 560 mm Each 33746.00 internal diameter total weight of cover and frame to be not less than (108+100) 208 kg. 29.8 Manhole for property (House) connection 29.8.1 Inside size 60x60 cm and 90 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 8777.00 frame i/c transportation etc. 600x600 mm size heavy duty. 29.8.2 Inside size 60x45 cm and 60 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 7109.00 frame i/c transportation etc. 600x450 mm size heavy duty. 29.9 Extra for depth up to 1.00 m for man holes over item 15.290x80cm size manhole over item | Metre | 6,901.00 |
| 29.9.2 | This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES - 2. Sewer Appurtenance Following are the General Sewer Appurtenances- 1) Manholes II) Inverted Syphon III) Storm Water Inlets V) Sewer Ventilators Out of the above, manholes are the most essential items in any sewerage system 1. Manhole 1.1 Function Manholes is the essential ancillary structure in any sewerage system. They shall be provided for inspection, testing, cleaning, repairing and removal of obstruction from sewer line. 1.2 Provision:- Manholes should be built at every change of alignment, gradient or diameter, at the head of all sewer and branches and at every junction of two or more sewers, on sewer, which is to be cleaned manually or which cannot be entered for cleaning or inspection. 1.3 Spacing:- The Maximum spacing of manholes in the sewer shall be kept as follows: - Pipe dia (mm) Max. Spacing (mt) Upto 900 30 900 to 1500 90 - 150 1500 to 2000 150 - 200 Above 2000 300 A spacing allowance of 100m per 1m dia of sewer is a general rule in case of very large sewers 1.4 Types of manholes: Following is the general classification of manholes- 1.4.1 Straight-through manholes:- The simplest type of manhole is that built on a straight run of sewer with no side junctions. Where there is a change in the size of sewer, the soffit or crown level of the two sewers should be the same, except where special conditions require otherwise. 1.4.2 Junction Manholes:- A manhole should be built at every junction of two or more sewers, and the curved portions of the inverts of tributary sewers should be formed within the manhole. To achieve this with the best economy of space, the chamber may be built of a shape other than rectangular. The soffit of the smaller sewer at a junction should be not lower than that of the larger sewer, in order to avoid the surcharging of the former when the letter is running full, and the hydraulic design usually assumes such a condition. The gradient of the smaller sewer may be increased from the previous manhole sufficiently to reduce the difference of invert level at the point of junction to a convenient amount. 1.4.3 Side Entrance Manholes:- In large sewer or where it is difficult to obtain direct vertical access to the sewer from ground level, owing to existing services, gas, water etc. the access shaft should be constructed in the nearest convenient position off the line of sewer, and connected to the manhole chamber by a lateral passage. In the tunnelled sewer the shaft and the lateral access heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading maybe constructed after the main tunnel is completed, provision having been made for breaking in from the access heading to build the chamber. The floor of the side- entrance passage, which should fall at about 1 in 30 towards the sewer, should enter the chamber not lower than the soffit level of the sewer. In large sewer where the floor of the side entrance passage is above the soffit either steps or a ladder (which should be protected either by a removable handrail or by safety chains) should be provided to reach the benching. 1.4.4 Drop Manholes:- When a sewer connects with another sewer, where the difference in level between water lines (peak flow levels) of main line and the invert level of branch line is more than 600 mm or a drop of more than 600 mm is required to be given in the same sewer line and it is uneconomical or impractical to arrange the connection with in 600 mm a drop connection shall be provided for which is manholes maybe built incorporating a vertical or nearly vertical drop pipe from the higher sewer to the lower one. This pipes maybe either outside the shaft and enclosed in concrete or supported on brackets inside the shaft, which should be suitably enlarged. If the drop pipe is outside the shaft, a continuation of the sewer should be built through the shaft wall to from a rodding and inspection eye, which should be provided with a half blank flange. If the drop pipe is inside the shaft. It should be in cast iron and it would be advantage ous to provide adequate means for rodding and water cushion of 150 mm depth should also be provided. The diameter of the backdrop should be at-least as large as that of the incoming pipe. The drop pipe should terminate at its lower end with a plain or duck-foot bend turned so as to discharge its flow at 45 degree or less then to the direction of the flow in the main sewer and the pipe, unless of cast iron, should be surrounded with 150 mm of concrete. In the case of sewer over 450 mm in diameter the drop in level may be accomplished by one of the following methods: - (a) A cascade: - This is a steep ramp composed of steps over which the flow is broken up and retarded. A pipe connecting the two levels is often concreted under the steps to allow small flow to pass without trickling over the steps. The cascade steps maybe made of heavy-duty bricks of class- I quality (IS: 2180- 1985) cement concrete with granolithic finish or dressed granite. (b) A Ramp: - A ramp maybe formed by increasing the grade of the last length of the upper sewer to about 45 degrees or by constructing a steeply graded channel or culvert leading from the high level to the low level sewer. In order to break up the flow down the ramp and minimize the turbulence in the main sewer the floor of culvert ramp should be obstructed by raced transverse ribs of either bricks or concrete at 1.50m intervals and a stilling pool provided at the bottom of the ramp and. (c) By drop in previous successive manholes instead of providing the total drop require at the junction manholes, the same may be achieved by giving smaller deeps in successive manhole preceding the junction manhole. Thus for example, if a total drop of 2.4m is required to be given, 0.6m drop maybe given in each of the previous three manholes and the last 0.6m-drop maybe given at the junction manhole. 1.4.5 Scraper (Service) Type Manhole:- All sewers above 450mm diameter should have manhole at intervals for 110 to 120 m of scraper type. This manhole should have clear opening of 1200 x 900 mm at top to facilitate lowering of buckets. 1.4.6 Flushing manholes:- Where it is not possible to obtain self-cleaning velocities due to flatness of the gradient specially at the top end of branch sewer which receive very little flow, it is essential that same form of flushing device be incorporated in the system. This can be done by making grooves at intervals of 45 to 50m in the main drains in which wooden planks are inserted & water allow to head up and which will rush on with great velocity when the planks are removed. Alternatively, an overhead water tanks is built, from which connection are made through pipe flushing hydrants to rush water to the sewer. The relevant Indian standard is IS:4111(part two). Flushing can be very conveniently accomplished by use of fire hydrant or tanker. Where flushing manhole is provided, they are located generally at the head of a sewer. Sufficient velocity shall be imparted in the sewer to wash away the deposited solid. The flush is usually effective up to a certain distance after which the imparted velocity gets dissipated. The automatic systems which are operated by mechanical units gets often corroded by the sewer gases and do not generally function satisfactorily and hence are not recommended. In case of hard chock ages in sewers, care should be exercised to be ensuring that there is no possibility or back flow of sewer into the water supply mains. Approximate quantities of water needed for flushing are as follows: - 200mm dia 250mm dia 300mm dia 1. 0.00502300 2500 3000 2. 0.00751500 1800 2300 3. 0.01001300 1500 2000 4. 0.0200500 800 1000 5. 0.0300400 500 700 2. Constructional Details:- Manhole is usually constructed directly over the centre line of the sewer they are usually constructed with brickwork. However in areas where sewers are to be laid in high water condition manhole shall be constructed in R.C.C. They are circular, rectangular or square in shape. Manholes should be of such size as will allow necessary cleaning and inspection of manholes. (a) Rectangular Manholes - The minimum internal sizes of rectangular manholes between brick face should be as follows: (i) For depth of manholes less than 0.9m, 900mm x 800mmand (ii) For depths of manholes from 0.9mm&upto 2.5m, 1200mmx 900mm (b) Arch type manholes - For depth of 2.5m and above, arch type manholes can be provided and the internal size of the chambers between brick faces shall be 1400mm x 900mm. The width of manhole chamber on bents and junction of pipes with diameter greater than 450mm should be suitably increased to 900mm or more so that benching width on either side of the channel to be at-least 200mm. 3. Circular manholes- Circular manholes are longer than rectangular and arch type manhole and thus there are preferred over rectangular as well as arch type manholes. The circular manholes can be provided for all depths starting from 0.9m circular manholes are straight down in lower portion and slanting in top portion so as to narrow down the top opening equal to internal dia. of manhole over. Depending upon the depth of manhole, the diameter of manhole changes. The internal diameter of circular manholes may be kept as following for verifying depths. (i) For depths 0.9m and up to 1.65mm, 900mm diameter (ii) For depths above 1.65m and up to 2.30m, 1200mm diameter (iii) For depths above 2.30m and up to 9.0m, 1500mm diameter. (iv) For depths above 9.0m and up to 14.0m, 1800mm diameter. Typical circular manholes are shown in fig.6 If the sewer is constructed in a tunnel, the manhole should be located at the access or working shaft and the manhole chamber maybe constructed of a size to suit the working shaft or vice-versa. The width /diameter of the manhole should not be less than internal diameter of the sewer +150mm benching as both sides (150mm+ 150mm) The opening for entry into the manhole (without cover) should be such minimum diameters as to allow a workman with the cleaning equipments into the interior of the manhole without difficulty. A minimum clear opening of 60cm preferably circular is recommended. Suitable steps usually cast iron shall be provided for entry. Access shaft for large sewers - Access shaft shall be circular in shape and shall have a minimum internal dia of 750mm, where the depth of the shaft exceeds 3m suitable dimensions shall be provided to facilitate cleaning and maintenance. Access shaft where built of brick work should be corbelled on three sides to reduce it to the size of the opening in the cover frame, and to provide easy access on the fourth side to step iron or ladder.In determining sizes the dimensions of the maintenance equipments likely to be used in sewer, shall be kept in view. Where the diameter of the sewer is increased, the crown of the entering leaving pipes shall be fixed at the same level and necessary slopes given in the inverted of the manholes chamber. In exceptional cases and where unavoidable the crown of the entering sewer maybe fixed at lower level but in each cases too the peak flow level of the two sewer shall be kept the same. A slab generally of plain cement concrete at least 150mm thick should be provided at the base to support the walls of the manhole and to prevent the entry of foul water. The thickness of the base also shall be suitably increased up to 300mm, for manholes on large dia sewers, with adequate reinforcement provided to withstand excessive uplift pressures. In the case of larger manholes, the flow in the sewer should be carried in U-Shaped smooth channelconstructed integrally with the concrete base of the manhole. The side of the channel should be equal to the dia. of the largest sewer pipe.The adjacent floor should have a slope of 1 in 10 draining to the channel. Where more than one sewer enters the manhole the flow through channel should be curved smoothly and should have sufficient capacity to carry the maximum flow. It is desirable to place the first pipe joint outside the manhole as close as practicable. The pipe shall be built inside the wall of the manhole flush with the internal periphery protected with an arch of masonry or cement concrete to prevent it from being crushed. The sidewalls of the manhole are usually constructed of cement brickwork 250mm thick and corbelled suitably to accommodate the frame of the manhole cover. The inside and outside of the brickwork should be plastered with cement mortar 1:3 (1 cement: 3 coarse sand) and inside finished smooth with a coat of neat cement. Where subsoil water condition exist, a richer mix may be used and it shall further be water proofed with addition of approved water proofing compound in a quantity as per manufacturer's specifications. 4. Covers and frames: The size of manhole covers should be such that there should be clear opening of not less than 560mm diameter for manholes exceeding 0.9m depths. When cast iron manhole covers and frames are used they shall conform to IS 1726 (parts 1 to 7). The frames of manhole shall be firmly embedded to correct alignment and level in plain concrete on the top of masonry. After completion of the work, manhole covers shall be sealed by means of thick grease. Where sewer are to be laid in high subsoil water conditions, manholes maybe constructed in R.C.C. of grade M 20 or 1:1.5:3. The manholes in this type of construction shall be preferably circular. Heavy reinforced concrete covers with suitable lifting arrangements could also be used instead of C.I manhole covers. However pre-cast cement concrete covers reinforced by materials other than mild steel should be used provided that those are properly tested & certified for use by competent authority. Fibre reinforcement plastic covers (FRP) conforming to relevant IS: may be used wherever such covers are available. 5. Inverted Syphon 5.1 Function and provision In the course of laying sewers, at times it is found necessary to cross obstructions like nallah etc. Such obstruction shall be crossed by means of "Inverted Syphon” i.e. by laying the sewer under the obstruction and regaining as much elevation as possible after the obstruction is passed. As the siphons are depressed below the hydraulic grade line, maintenance of self cleaning velocity at all flows is very important. Two considerations, which govern the profile of a siphon, are provision for hydraulic losses and case of cleaning. 5.2 Construction To ensure self-cleaning velocities for the wide variations in flows, generally, two or more pipes not less than 200mm dia are provided in parallel so that up to the average flows, first pipe is used and when the flow exceeds the average, the second and subsequent pipes take the balance flow. Siphons may need cleaning other than gravity sewers and hence should not have any sharp bends either horizontal or vertical. Only smooth curves of adequate radius should be used. The design criteria for inverted siphons are given in IS: 411 part -III. It is necessary to have a self-cleaning velocity of 1.0 mps for the minimum flow to avoid deposition in the line. Provision should be made for isolating the individual pipes as well as the syphon to facilitate cleaning. It is desirable to provide a course screen to prevent the entry of rags etc, into the syphon. 5.3 Inlet and outlet chambers:- In the multiple pipe syphon, the inlet should be such that the pipes coming to action successively as the flow increases. This may be achieved by providing lateral with heights kept in accordance with the depth of flow at which one or more siphon pipes functions. In the two-pipe siphon, the first should take 1.25 to 1.5 times the average flow and second should take the balance of the flow. A manhole at each end of the siphon should be provided with clearance for rodding. The design of inlet and outlet chambers should allow sufficient room for entry for cleaning and maintenance of siphons. The outlet chambers should be so designed as to prevent the flow of sewage into pipes, which are not being used at the time of minimum flow. 6. Hatch box: Hatch boxes of adequate size in manholes shall be provided on the pipes so as to give access into the pipes for rodding. 7. By pass: Proper by pass arrangements should be provided from the inlet chamber and if required special arrangements should be made for pumping the sewage to the lower reach of sewer line. Alternatively a vacuum pump maybe provided at the outlet to overcome maintenance problems arising out of dogging and silting of siphons. If it is possible a blow off may be installed at the low point to facilitate emergency maintenance operations. 8. Storm water inlets:- There are device meant to admit the surface runoff to the sewers and form a very important part of the systems. Their location and design should therefore be given careful considerations. Storm water inlets maybe categorised under three major groups viz. curb inlets, gutter inlets and combination inlets, each being either depressed or flush depending upon their elevation with reference to the pavement surface. The actual structure of an inlet is usually made of brickwork. Normallycast-iron gratings conforming to IS: 5961 shall be used. In case there is no vehicular traffic, fabricated steel gratings maybe used. The clear opening shall not be more than 25mm. The connecting pipe from the street inlet to the main street sewer should not be less than 200mm in dia. and should have sufficient slope. Maximum spacing of inlets would depend upon various conditions of road surface, size and type of inlet and rainfall. A maximum spacing of 30m is recommended. 9. Sewer ventilators:- In a modern, well designed sewerage system, there is no need to provide ventilation on such elaborate scale considered necessary in the past, especially with the present day policy to omit intercepting traps in house connections. The ventilating columns/shafts are not necessary where intercepting traps are not provided. It is necessary however, to make provision for the escape of air to take care of the exigencies of full flow and also to keep the sewage as fresh as possible especially in out fall sewers. In case of storm sewers providing ventilating manhole covers can do these. 9.1 Provision: Ventilating columns/ shafts shall be provided at an internal of 180m in all mains intercepting and outfall sewers, near the manholes. The connections of house drains to the sewer shall be allowed without the use of any intercepting trap and thus permitting ventilation of laterals and branch sewers via. House drains and their ventilating pipes. 9.2 Construction: - The ventilating shaft shall consist of vertical columns of R.C.C. or cast iron about 6 to 8 metre in height and about 100 to 150mm in diameter (opening) at the top, the diameter increasing uniformly towards the bottom for stability. The shaft shall be provided with a Crowell or fitted with a wire ground at the top. 10. This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES- 3. Sewerage Maintenance 1 Contractor is bound to follow the guide line of CPHEEO manual on sewerage & sewage treatment system (Part-B) issued by Ministry of Urban Development, New Delhi w.e.f. November 2013. 2 The tools, plant, machinery and pumps required for cleaning should be arranged by the contractor at his own cost. 3 The payment will be made after successful testing of line only. No payment will be made for testing work in pieces. 4 No payment will be made for dewatering whatsoever involve in cleaning of manhole & sewer line. The payment of Dat (temporary plugging of chambers) will be made for cleaning of chamber only in accordance with volume of pipes, manholes and drains. The rates of Dat are included in the SOR. 5 The manhole cover for replacement will be issued from the store & no extra payment will be made for loading, unloading and transportation of manhole cover with frame upto the work site. 6 The contractor shall be fully and solely responsible for making all safety arrangements pertaining to the work such as barricading, lighting, arrangement of gas masks, safety belts and oxygen cylinder etc. 7 Shifting of silt and garbage will be done as per the direction of the Engineer- incharge. 8 Providing and fixing of CI/SFRC manhole cover with frame may be replaced (if required) but the cover shall be as per ISI mark only. The payment will be made as per rates applicable in the USOR. 9 The rates for various works given in the unified schedule of rates include contractor profit over head expenses, water and T&P expenses. 10 Some poisonous & inflammable gases are observed in deep sewers manholes, to prevent any disaster due to trance gases, the safety of cleaning staff is the responsibility of the contractor. 11 The department is not responsible for any accident during cleaning of sewer line. The contractor is fully responsible for any compensation to labour or for any legal action arising due to the accident. 12 This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates based on this USOR will include GST as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. SALT GLAZED STONEWARE PIPES, SEWER APPURTENANCES 1. Salt Glazed Stoneware Pipes Rate 29.1 Providing and Laying and Jointing salt glazed stone ware (S.W.) pipes socket and spigot with stiff cement mortar 1:1 including testing of joints complete. 29.1.1 100 mm Meter 388.00 29.1.2 150 mm Meter 558.00 29.1.3 200 mm Meter 893.00 29.1.4 250 mm Meter 1342.00 29.1.5 300 mm Meter 1795.00 29.2 Labour only for Laying and Jointing salt glazed stone ware (S.W.) pipes S&S (socket and spigot) with stiff cement mortar 1:1 including testing of joints complete. 29.2.1 100mm Meter 84.00 29.2.2 150 mm Meter 121.00 29.2.3 200 mm Meter 143.00 29.2.4 250 mm Meter 194.00 29.2.5 300 mm Meter 225.00 29.3 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sand: 10 graded stone aggregate 40 mm nominal size) around S.W. pipe including bed concrete 15 cm thick i/c curing, testing etc. complete for 100 mm dia. to 300 mm dia pipe. (For type "Concrete Around") 29.3.1 100mm dia SW pipe Meter 282.00 29.3.2 150mm dia Meter 456.00 29.3.3 200mm dia Meter 536.00 29.3.4 250mm dia Meter 624.00 29.3.5 300mm dia Meter 720.00 29.4 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sa`nd: 10 graded stone aggregate 40 mm nominal size) up to haunches of SW – pipes including bed concrete i/c curing, testing etc complete for 100mm to 300mm dia SW pipe For Type "Concrete up to Haunches ") 29.4.1 100mm dia pipe Meter 592.00 29.4.2 150mm dia Meter 724.00 29.4.3 200mm dia Meter 844.00 29.4.4 250mm dia Meter 976.00 29.4.5 300mm dia Meter 1121.00 29.5 Dismantling of old S.W. pipes including breaking of Rate joints and bed concrete stacking of useful materials near the site within 50 m lead and disposal of unserviceable materials in to municipal dumps: 29.5.1 100mm dia pipe Meter 36.00 29.5.2 150mm dia Meter 39.00 29.5.3 200mm dia Meter 42.00 29.5.4 250mm dia Meter 44.00 29.5.5 300mm dia Meter 47.00 2. Sewer Appurtenances Rate 29.6 Providing and fixing SW gully trap complete with CI grating, Brick masonry chamber in cement mortar 1:4 (1 cement: 4 fine sand) water tight CI cover with frame of 30x30cm size including necessary Excavation, cement concrete grade M-5 (Nominal Mix) with stone aggregate 40mm nominal size, fixing CI cover with frame in Cement concrete grade M-15 (Nominal Mix) with stone aggregate 20mm nominal size, 12 mm thick cement plaster 1:2 (1 cement: 2 coarse sand ) finished with a floating coat of neat cement complete. 29.6.1 100x100mm size "P" Gully Trap Chamber Each 2085.00 29.6.2 125x100mm size "p", "Q" or "S" type Gully trap chamber Each 2059.00 29.6.3 180x150mm size "P" or "S" type Each 2114.00 29.7 Constructing Brick Masonry Manhole in Cement Mortar 1:4 (1 cement: 4 fine sand) R.C.C. top slab 1:1.5:3 (1 cement: 1.5 coarse sand: 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:4:8 mix (1cement: 4 coarse sand: 8 graded stone aggregate 40mm nominal size) inside plastering 12mm thick with cement mortar 1:3 (1cement: 3 fine sand) finished with a floating coat of neat cement and making channels in CC 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size) including finishing the channel to shape, curing etc. (Excavation foot rest and external cement plaster shall be paid for separately) 29.7.1 Inside size 90x80 cm and 45 cm deep including CI cover with frame 455x610 mm internal dimensions Each 10457.00 total weight of cover and frames to be not less than (23+15) 38 kg. 29.7.2 Inside size 90x80 cm and 60 cm deep including CI Each 11501.00 Rate cover with frame 455x610mm internal dimensions total weight of cover and frames to be not less than (23+15) 38 kg 29.7.3 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (medium duty) 500mm Each 25628.00 internal diameter total weight of cover and frame to be not less than (58+58) 116 kg. 29.7.4 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (Heavy duty) 560 mm Each 33746.00 internal diameter total weight of cover and frame to be not less than (108+100) 208 kg. 29.8 Manhole for property (House) connection 29.8.1 Inside size 60x60 cm and 90 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 8777.00 frame i/c transportation etc. 600x600 mm size heavy duty. 29.8.2 Inside size 60x45 cm and 60 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 7109.00 frame i/c transportation etc. 600x450 mm size heavy duty. 29.9 Extra for depth up to 1.00 m for man holes over item 15.2120x90cm size manhole over item | Metre | 8,253.00 |
| 29.9.3 | This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES - 2. Sewer Appurtenance Following are the General Sewer Appurtenances- 1) Manholes II) Inverted Syphon III) Storm Water Inlets V) Sewer Ventilators Out of the above, manholes are the most essential items in any sewerage system 1. Manhole 1.1 Function Manholes is the essential ancillary structure in any sewerage system. They shall be provided for inspection, testing, cleaning, repairing and removal of obstruction from sewer line. 1.2 Provision:- Manholes should be built at every change of alignment, gradient or diameter, at the head of all sewer and branches and at every junction of two or more sewers, on sewer, which is to be cleaned manually or which cannot be entered for cleaning or inspection. 1.3 Spacing:- The Maximum spacing of manholes in the sewer shall be kept as follows: - Pipe dia (mm) Max. Spacing (mt) Upto 900 30 900 to 1500 90 - 150 1500 to 2000 150 - 200 Above 2000 300 A spacing allowance of 100m per 1m dia of sewer is a general rule in case of very large sewers 1.4 Types of manholes: Following is the general classification of manholes- 1.4.1 Straight-through manholes:- The simplest type of manhole is that built on a straight run of sewer with no side junctions. Where there is a change in the size of sewer, the soffit or crown level of the two sewers should be the same, except where special conditions require otherwise. 1.4.2 Junction Manholes:- A manhole should be built at every junction of two or more sewers, and the curved portions of the inverts of tributary sewers should be formed within the manhole. To achieve this with the best economy of space, the chamber may be built of a shape other than rectangular. The soffit of the smaller sewer at a junction should be not lower than that of the larger sewer, in order to avoid the surcharging of the former when the letter is running full, and the hydraulic design usually assumes such a condition. The gradient of the smaller sewer may be increased from the previous manhole sufficiently to reduce the difference of invert level at the point of junction to a convenient amount. 1.4.3 Side Entrance Manholes:- In large sewer or where it is difficult to obtain direct vertical access to the sewer from ground level, owing to existing services, gas, water etc. the access shaft should be constructed in the nearest convenient position off the line of sewer, and connected to the manhole chamber by a lateral passage. In the tunnelled sewer the shaft and the lateral access heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading maybe constructed after the main tunnel is completed, provision having been made for breaking in from the access heading to build the chamber. The floor of the side- entrance passage, which should fall at about 1 in 30 towards the sewer, should enter the chamber not lower than the soffit level of the sewer. In large sewer where the floor of the side entrance passage is above the soffit either steps or a ladder (which should be protected either by a removable handrail or by safety chains) should be provided to reach the benching. 1.4.4 Drop Manholes:- When a sewer connects with another sewer, where the difference in level between water lines (peak flow levels) of main line and the invert level of branch line is more than 600 mm or a drop of more than 600 mm is required to be given in the same sewer line and it is uneconomical or impractical to arrange the connection with in 600 mm a drop connection shall be provided for which is manholes maybe built incorporating a vertical or nearly vertical drop pipe from the higher sewer to the lower one. This pipes maybe either outside the shaft and enclosed in concrete or supported on brackets inside the shaft, which should be suitably enlarged. If the drop pipe is outside the shaft, a continuation of the sewer should be built through the shaft wall to from a rodding and inspection eye, which should be provided with a half blank flange. If the drop pipe is inside the shaft. It should be in cast iron and it would be advantage ous to provide adequate means for rodding and water cushion of 150 mm depth should also be provided. The diameter of the backdrop should be at-least as large as that of the incoming pipe. The drop pipe should terminate at its lower end with a plain or duck-foot bend turned so as to discharge its flow at 45 degree or less then to the direction of the flow in the main sewer and the pipe, unless of cast iron, should be surrounded with 150 mm of concrete. In the case of sewer over 450 mm in diameter the drop in level may be accomplished by one of the following methods: - (a) A cascade: - This is a steep ramp composed of steps over which the flow is broken up and retarded. A pipe connecting the two levels is often concreted under the steps to allow small flow to pass without trickling over the steps. The cascade steps maybe made of heavy-duty bricks of class- I quality (IS: 2180- 1985) cement concrete with granolithic finish or dressed granite. (b) A Ramp: - A ramp maybe formed by increasing the grade of the last length of the upper sewer to about 45 degrees or by constructing a steeply graded channel or culvert leading from the high level to the low level sewer. In order to break up the flow down the ramp and minimize the turbulence in the main sewer the floor of culvert ramp should be obstructed by raced transverse ribs of either bricks or concrete at 1.50m intervals and a stilling pool provided at the bottom of the ramp and. (c) By drop in previous successive manholes instead of providing the total drop require at the junction manholes, the same may be achieved by giving smaller deeps in successive manhole preceding the junction manhole. Thus for example, if a total drop of 2.4m is required to be given, 0.6m drop maybe given in each of the previous three manholes and the last 0.6m-drop maybe given at the junction manhole. 1.4.5 Scraper (Service) Type Manhole:- All sewers above 450mm diameter should have manhole at intervals for 110 to 120 m of scraper type. This manhole should have clear opening of 1200 x 900 mm at top to facilitate lowering of buckets. 1.4.6 Flushing manholes:- Where it is not possible to obtain self-cleaning velocities due to flatness of the gradient specially at the top end of branch sewer which receive very little flow, it is essential that same form of flushing device be incorporated in the system. This can be done by making grooves at intervals of 45 to 50m in the main drains in which wooden planks are inserted & water allow to head up and which will rush on with great velocity when the planks are removed. Alternatively, an overhead water tanks is built, from which connection are made through pipe flushing hydrants to rush water to the sewer. The relevant Indian standard is IS:4111(part two). Flushing can be very conveniently accomplished by use of fire hydrant or tanker. Where flushing manhole is provided, they are located generally at the head of a sewer. Sufficient velocity shall be imparted in the sewer to wash away the deposited solid. The flush is usually effective up to a certain distance after which the imparted velocity gets dissipated. The automatic systems which are operated by mechanical units gets often corroded by the sewer gases and do not generally function satisfactorily and hence are not recommended. In case of hard chock ages in sewers, care should be exercised to be ensuring that there is no possibility or back flow of sewer into the water supply mains. Approximate quantities of water needed for flushing are as follows: - 200mm dia 250mm dia 300mm dia 1. 0.00502300 2500 3000 2. 0.00751500 1800 2300 3. 0.01001300 1500 2000 4. 0.0200500 800 1000 5. 0.0300400 500 700 2. Constructional Details:- Manhole is usually constructed directly over the centre line of the sewer they are usually constructed with brickwork. However in areas where sewers are to be laid in high water condition manhole shall be constructed in R.C.C. They are circular, rectangular or square in shape. Manholes should be of such size as will allow necessary cleaning and inspection of manholes. (a) Rectangular Manholes - The minimum internal sizes of rectangular manholes between brick face should be as follows: (i) For depth of manholes less than 0.9m, 900mm x 800mmand (ii) For depths of manholes from 0.9mm&upto 2.5m, 1200mmx 900mm (b) Arch type manholes - For depth of 2.5m and above, arch type manholes can be provided and the internal size of the chambers between brick faces shall be 1400mm x 900mm. The width of manhole chamber on bents and junction of pipes with diameter greater than 450mm should be suitably increased to 900mm or more so that benching width on either side of the channel to be at-least 200mm. 3. Circular manholes- Circular manholes are longer than rectangular and arch type manhole and thus there are preferred over rectangular as well as arch type manholes. The circular manholes can be provided for all depths starting from 0.9m circular manholes are straight down in lower portion and slanting in top portion so as to narrow down the top opening equal to internal dia. of manhole over. Depending upon the depth of manhole, the diameter of manhole changes. The internal diameter of circular manholes may be kept as following for verifying depths. (i) For depths 0.9m and up to 1.65mm, 900mm diameter (ii) For depths above 1.65m and up to 2.30m, 1200mm diameter (iii) For depths above 2.30m and up to 9.0m, 1500mm diameter. (iv) For depths above 9.0m and up to 14.0m, 1800mm diameter. Typical circular manholes are shown in fig.6 If the sewer is constructed in a tunnel, the manhole should be located at the access or working shaft and the manhole chamber maybe constructed of a size to suit the working shaft or vice-versa. The width /diameter of the manhole should not be less than internal diameter of the sewer +150mm benching as both sides (150mm+ 150mm) The opening for entry into the manhole (without cover) should be such minimum diameters as to allow a workman with the cleaning equipments into the interior of the manhole without difficulty. A minimum clear opening of 60cm preferably circular is recommended. Suitable steps usually cast iron shall be provided for entry. Access shaft for large sewers - Access shaft shall be circular in shape and shall have a minimum internal dia of 750mm, where the depth of the shaft exceeds 3m suitable dimensions shall be provided to facilitate cleaning and maintenance. Access shaft where built of brick work should be corbelled on three sides to reduce it to the size of the opening in the cover frame, and to provide easy access on the fourth side to step iron or ladder.In determining sizes the dimensions of the maintenance equipments likely to be used in sewer, shall be kept in view. Where the diameter of the sewer is increased, the crown of the entering leaving pipes shall be fixed at the same level and necessary slopes given in the inverted of the manholes chamber. In exceptional cases and where unavoidable the crown of the entering sewer maybe fixed at lower level but in each cases too the peak flow level of the two sewer shall be kept the same. A slab generally of plain cement concrete at least 150mm thick should be provided at the base to support the walls of the manhole and to prevent the entry of foul water. The thickness of the base also shall be suitably increased up to 300mm, for manholes on large dia sewers, with adequate reinforcement provided to withstand excessive uplift pressures. In the case of larger manholes, the flow in the sewer should be carried in U-Shaped smooth channelconstructed integrally with the concrete base of the manhole. The side of the channel should be equal to the dia. of the largest sewer pipe.The adjacent floor should have a slope of 1 in 10 draining to the channel. Where more than one sewer enters the manhole the flow through channel should be curved smoothly and should have sufficient capacity to carry the maximum flow. It is desirable to place the first pipe joint outside the manhole as close as practicable. The pipe shall be built inside the wall of the manhole flush with the internal periphery protected with an arch of masonry or cement concrete to prevent it from being crushed. The sidewalls of the manhole are usually constructed of cement brickwork 250mm thick and corbelled suitably to accommodate the frame of the manhole cover. The inside and outside of the brickwork should be plastered with cement mortar 1:3 (1 cement: 3 coarse sand) and inside finished smooth with a coat of neat cement. Where subsoil water condition exist, a richer mix may be used and it shall further be water proofed with addition of approved water proofing compound in a quantity as per manufacturer's specifications. 4. Covers and frames: The size of manhole covers should be such that there should be clear opening of not less than 560mm diameter for manholes exceeding 0.9m depths. When cast iron manhole covers and frames are used they shall conform to IS 1726 (parts 1 to 7). The frames of manhole shall be firmly embedded to correct alignment and level in plain concrete on the top of masonry. After completion of the work, manhole covers shall be sealed by means of thick grease. Where sewer are to be laid in high subsoil water conditions, manholes maybe constructed in R.C.C. of grade M 20 or 1:1.5:3. The manholes in this type of construction shall be preferably circular. Heavy reinforced concrete covers with suitable lifting arrangements could also be used instead of C.I manhole covers. However pre-cast cement concrete covers reinforced by materials other than mild steel should be used provided that those are properly tested & certified for use by competent authority. Fibre reinforcement plastic covers (FRP) conforming to relevant IS: may be used wherever such covers are available. 5. Inverted Syphon 5.1 Function and provision In the course of laying sewers, at times it is found necessary to cross obstructions like nallah etc. Such obstruction shall be crossed by means of "Inverted Syphon” i.e. by laying the sewer under the obstruction and regaining as much elevation as possible after the obstruction is passed. As the siphons are depressed below the hydraulic grade line, maintenance of self cleaning velocity at all flows is very important. Two considerations, which govern the profile of a siphon, are provision for hydraulic losses and case of cleaning. 5.2 Construction To ensure self-cleaning velocities for the wide variations in flows, generally, two or more pipes not less than 200mm dia are provided in parallel so that up to the average flows, first pipe is used and when the flow exceeds the average, the second and subsequent pipes take the balance flow. Siphons may need cleaning other than gravity sewers and hence should not have any sharp bends either horizontal or vertical. Only smooth curves of adequate radius should be used. The design criteria for inverted siphons are given in IS: 411 part -III. It is necessary to have a self-cleaning velocity of 1.0 mps for the minimum flow to avoid deposition in the line. Provision should be made for isolating the individual pipes as well as the syphon to facilitate cleaning. It is desirable to provide a course screen to prevent the entry of rags etc, into the syphon. 5.3 Inlet and outlet chambers:- In the multiple pipe syphon, the inlet should be such that the pipes coming to action successively as the flow increases. This may be achieved by providing lateral with heights kept in accordance with the depth of flow at which one or more siphon pipes functions. In the two-pipe siphon, the first should take 1.25 to 1.5 times the average flow and second should take the balance of the flow. A manhole at each end of the siphon should be provided with clearance for rodding. The design of inlet and outlet chambers should allow sufficient room for entry for cleaning and maintenance of siphons. The outlet chambers should be so designed as to prevent the flow of sewage into pipes, which are not being used at the time of minimum flow. 6. Hatch box: Hatch boxes of adequate size in manholes shall be provided on the pipes so as to give access into the pipes for rodding. 7. By pass: Proper by pass arrangements should be provided from the inlet chamber and if required special arrangements should be made for pumping the sewage to the lower reach of sewer line. Alternatively a vacuum pump maybe provided at the outlet to overcome maintenance problems arising out of dogging and silting of siphons. If it is possible a blow off may be installed at the low point to facilitate emergency maintenance operations. 8. Storm water inlets:- There are device meant to admit the surface runoff to the sewers and form a very important part of the systems. Their location and design should therefore be given careful considerations. Storm water inlets maybe categorised under three major groups viz. curb inlets, gutter inlets and combination inlets, each being either depressed or flush depending upon their elevation with reference to the pavement surface. The actual structure of an inlet is usually made of brickwork. Normallycast-iron gratings conforming to IS: 5961 shall be used. In case there is no vehicular traffic, fabricated steel gratings maybe used. The clear opening shall not be more than 25mm. The connecting pipe from the street inlet to the main street sewer should not be less than 200mm in dia. and should have sufficient slope. Maximum spacing of inlets would depend upon various conditions of road surface, size and type of inlet and rainfall. A maximum spacing of 30m is recommended. 9. Sewer ventilators:- In a modern, well designed sewerage system, there is no need to provide ventilation on such elaborate scale considered necessary in the past, especially with the present day policy to omit intercepting traps in house connections. The ventilating columns/shafts are not necessary where intercepting traps are not provided. It is necessary however, to make provision for the escape of air to take care of the exigencies of full flow and also to keep the sewage as fresh as possible especially in out fall sewers. In case of storm sewers providing ventilating manhole covers can do these. 9.1 Provision: Ventilating columns/ shafts shall be provided at an internal of 180m in all mains intercepting and outfall sewers, near the manholes. The connections of house drains to the sewer shall be allowed without the use of any intercepting trap and thus permitting ventilation of laterals and branch sewers via. House drains and their ventilating pipes. 9.2 Construction: - The ventilating shaft shall consist of vertical columns of R.C.C. or cast iron about 6 to 8 metre in height and about 100 to 150mm in diameter (opening) at the top, the diameter increasing uniformly towards the bottom for stability. The shaft shall be provided with a Crowell or fitted with a wire ground at the top. 10. This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES- 3. Sewerage Maintenance 1 Contractor is bound to follow the guide line of CPHEEO manual on sewerage & sewage treatment system (Part-B) issued by Ministry of Urban Development, New Delhi w.e.f. November 2013. 2 The tools, plant, machinery and pumps required for cleaning should be arranged by the contractor at his own cost. 3 The payment will be made after successful testing of line only. No payment will be made for testing work in pieces. 4 No payment will be made for dewatering whatsoever involve in cleaning of manhole & sewer line. The payment of Dat (temporary plugging of chambers) will be made for cleaning of chamber only in accordance with volume of pipes, manholes and drains. The rates of Dat are included in the SOR. 5 The manhole cover for replacement will be issued from the store & no extra payment will be made for loading, unloading and transportation of manhole cover with frame upto the work site. 6 The contractor shall be fully and solely responsible for making all safety arrangements pertaining to the work such as barricading, lighting, arrangement of gas masks, safety belts and oxygen cylinder etc. 7 Shifting of silt and garbage will be done as per the direction of the Engineer- incharge. 8 Providing and fixing of CI/SFRC manhole cover with frame may be replaced (if required) but the cover shall be as per ISI mark only. The payment will be made as per rates applicable in the USOR. 9 The rates for various works given in the unified schedule of rates include contractor profit over head expenses, water and T&P expenses. 10 Some poisonous & inflammable gases are observed in deep sewers manholes, to prevent any disaster due to trance gases, the safety of cleaning staff is the responsibility of the contractor. 11 The department is not responsible for any accident during cleaning of sewer line. The contractor is fully responsible for any compensation to labour or for any legal action arising due to the accident. 12 This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates based on this USOR will include GST as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. SALT GLAZED STONEWARE PIPES, SEWER APPURTENANCES 1. Salt Glazed Stoneware Pipes Rate 29.1 Providing and Laying and Jointing salt glazed stone ware (S.W.) pipes socket and spigot with stiff cement mortar 1:1 including testing of joints complete. 29.1.1 100 mm Meter 388.00 29.1.2 150 mm Meter 558.00 29.1.3 200 mm Meter 893.00 29.1.4 250 mm Meter 1342.00 29.1.5 300 mm Meter 1795.00 29.2 Labour only for Laying and Jointing salt glazed stone ware (S.W.) pipes S&S (socket and spigot) with stiff cement mortar 1:1 including testing of joints complete. 29.2.1 100mm Meter 84.00 29.2.2 150 mm Meter 121.00 29.2.3 200 mm Meter 143.00 29.2.4 250 mm Meter 194.00 29.2.5 300 mm Meter 225.00 29.3 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sand: 10 graded stone aggregate 40 mm nominal size) around S.W. pipe including bed concrete 15 cm thick i/c curing, testing etc. complete for 100 mm dia. to 300 mm dia pipe. (For type "Concrete Around") 29.3.1 100mm dia SW pipe Meter 282.00 29.3.2 150mm dia Meter 456.00 29.3.3 200mm dia Meter 536.00 29.3.4 250mm dia Meter 624.00 29.3.5 300mm dia Meter 720.00 29.4 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sa`nd: 10 graded stone aggregate 40 mm nominal size) up to haunches of SW – pipes including bed concrete i/c curing, testing etc complete for 100mm to 300mm dia SW pipe For Type "Concrete up to Haunches ") 29.4.1 100mm dia pipe Meter 592.00 29.4.2 150mm dia Meter 724.00 29.4.3 200mm dia Meter 844.00 29.4.4 250mm dia Meter 976.00 29.4.5 300mm dia Meter 1121.00 29.5 Dismantling of old S.W. pipes including breaking of Rate joints and bed concrete stacking of useful materials near the site within 50 m lead and disposal of unserviceable materials in to municipal dumps: 29.5.1 100mm dia pipe Meter 36.00 29.5.2 150mm dia Meter 39.00 29.5.3 200mm dia Meter 42.00 29.5.4 250mm dia Meter 44.00 29.5.5 300mm dia Meter 47.00 2. Sewer Appurtenances Rate 29.6 Providing and fixing SW gully trap complete with CI grating, Brick masonry chamber in cement mortar 1:4 (1 cement: 4 fine sand) water tight CI cover with frame of 30x30cm size including necessary Excavation, cement concrete grade M-5 (Nominal Mix) with stone aggregate 40mm nominal size, fixing CI cover with frame in Cement concrete grade M-15 (Nominal Mix) with stone aggregate 20mm nominal size, 12 mm thick cement plaster 1:2 (1 cement: 2 coarse sand ) finished with a floating coat of neat cement complete. 29.6.1 100x100mm size "P" Gully Trap Chamber Each 2085.00 29.6.2 125x100mm size "p", "Q" or "S" type Gully trap chamber Each 2059.00 29.6.3 180x150mm size "P" or "S" type Each 2114.00 29.7 Constructing Brick Masonry Manhole in Cement Mortar 1:4 (1 cement: 4 fine sand) R.C.C. top slab 1:1.5:3 (1 cement: 1.5 coarse sand: 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:4:8 mix (1cement: 4 coarse sand: 8 graded stone aggregate 40mm nominal size) inside plastering 12mm thick with cement mortar 1:3 (1cement: 3 fine sand) finished with a floating coat of neat cement and making channels in CC 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size) including finishing the channel to shape, curing etc. (Excavation foot rest and external cement plaster shall be paid for separately) 29.7.1 Inside size 90x80 cm and 45 cm deep including CI cover with frame 455x610 mm internal dimensions Each 10457.00 total weight of cover and frames to be not less than (23+15) 38 kg. 29.7.2 Inside size 90x80 cm and 60 cm deep including CI Each 11501.00 Rate cover with frame 455x610mm internal dimensions total weight of cover and frames to be not less than (23+15) 38 kg 29.7.3 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (medium duty) 500mm Each 25628.00 internal diameter total weight of cover and frame to be not less than (58+58) 116 kg. 29.7.4 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (Heavy duty) 560 mm Each 33746.00 internal diameter total weight of cover and frame to be not less than (108+100) 208 kg. 29.8 Manhole for property (House) connection 29.8.1 Inside size 60x60 cm and 90 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 8777.00 frame i/c transportation etc. 600x600 mm size heavy duty. 29.8.2 Inside size 60x45 cm and 60 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 7109.00 frame i/c transportation etc. 600x450 mm size heavy duty. 29.9 Extra for depth up to 1.00 m for man holes over item 15.260x60cm size manhole over item | Metre | 4,500.00 |
| 29.9.4 | This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES - 2. Sewer Appurtenance Following are the General Sewer Appurtenances- 1) Manholes II) Inverted Syphon III) Storm Water Inlets V) Sewer Ventilators Out of the above, manholes are the most essential items in any sewerage system 1. Manhole 1.1 Function Manholes is the essential ancillary structure in any sewerage system. They shall be provided for inspection, testing, cleaning, repairing and removal of obstruction from sewer line. 1.2 Provision:- Manholes should be built at every change of alignment, gradient or diameter, at the head of all sewer and branches and at every junction of two or more sewers, on sewer, which is to be cleaned manually or which cannot be entered for cleaning or inspection. 1.3 Spacing:- The Maximum spacing of manholes in the sewer shall be kept as follows: - Pipe dia (mm) Max. Spacing (mt) Upto 900 30 900 to 1500 90 - 150 1500 to 2000 150 - 200 Above 2000 300 A spacing allowance of 100m per 1m dia of sewer is a general rule in case of very large sewers 1.4 Types of manholes: Following is the general classification of manholes- 1.4.1 Straight-through manholes:- The simplest type of manhole is that built on a straight run of sewer with no side junctions. Where there is a change in the size of sewer, the soffit or crown level of the two sewers should be the same, except where special conditions require otherwise. 1.4.2 Junction Manholes:- A manhole should be built at every junction of two or more sewers, and the curved portions of the inverts of tributary sewers should be formed within the manhole. To achieve this with the best economy of space, the chamber may be built of a shape other than rectangular. The soffit of the smaller sewer at a junction should be not lower than that of the larger sewer, in order to avoid the surcharging of the former when the letter is running full, and the hydraulic design usually assumes such a condition. The gradient of the smaller sewer may be increased from the previous manhole sufficiently to reduce the difference of invert level at the point of junction to a convenient amount. 1.4.3 Side Entrance Manholes:- In large sewer or where it is difficult to obtain direct vertical access to the sewer from ground level, owing to existing services, gas, water etc. the access shaft should be constructed in the nearest convenient position off the line of sewer, and connected to the manhole chamber by a lateral passage. In the tunnelled sewer the shaft and the lateral access heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading may be used as a working shaft, the tunnel being broken out from the end of the heading, or alternatively the shaft and heading maybe constructed after the main tunnel is completed, provision having been made for breaking in from the access heading to build the chamber. The floor of the side- entrance passage, which should fall at about 1 in 30 towards the sewer, should enter the chamber not lower than the soffit level of the sewer. In large sewer where the floor of the side entrance passage is above the soffit either steps or a ladder (which should be protected either by a removable handrail or by safety chains) should be provided to reach the benching. 1.4.4 Drop Manholes:- When a sewer connects with another sewer, where the difference in level between water lines (peak flow levels) of main line and the invert level of branch line is more than 600 mm or a drop of more than 600 mm is required to be given in the same sewer line and it is uneconomical or impractical to arrange the connection with in 600 mm a drop connection shall be provided for which is manholes maybe built incorporating a vertical or nearly vertical drop pipe from the higher sewer to the lower one. This pipes maybe either outside the shaft and enclosed in concrete or supported on brackets inside the shaft, which should be suitably enlarged. If the drop pipe is outside the shaft, a continuation of the sewer should be built through the shaft wall to from a rodding and inspection eye, which should be provided with a half blank flange. If the drop pipe is inside the shaft. It should be in cast iron and it would be advantage ous to provide adequate means for rodding and water cushion of 150 mm depth should also be provided. The diameter of the backdrop should be at-least as large as that of the incoming pipe. The drop pipe should terminate at its lower end with a plain or duck-foot bend turned so as to discharge its flow at 45 degree or less then to the direction of the flow in the main sewer and the pipe, unless of cast iron, should be surrounded with 150 mm of concrete. In the case of sewer over 450 mm in diameter the drop in level may be accomplished by one of the following methods: - (a) A cascade: - This is a steep ramp composed of steps over which the flow is broken up and retarded. A pipe connecting the two levels is often concreted under the steps to allow small flow to pass without trickling over the steps. The cascade steps maybe made of heavy-duty bricks of class- I quality (IS: 2180- 1985) cement concrete with granolithic finish or dressed granite. (b) A Ramp: - A ramp maybe formed by increasing the grade of the last length of the upper sewer to about 45 degrees or by constructing a steeply graded channel or culvert leading from the high level to the low level sewer. In order to break up the flow down the ramp and minimize the turbulence in the main sewer the floor of culvert ramp should be obstructed by raced transverse ribs of either bricks or concrete at 1.50m intervals and a stilling pool provided at the bottom of the ramp and. (c) By drop in previous successive manholes instead of providing the total drop require at the junction manholes, the same may be achieved by giving smaller deeps in successive manhole preceding the junction manhole. Thus for example, if a total drop of 2.4m is required to be given, 0.6m drop maybe given in each of the previous three manholes and the last 0.6m-drop maybe given at the junction manhole. 1.4.5 Scraper (Service) Type Manhole:- All sewers above 450mm diameter should have manhole at intervals for 110 to 120 m of scraper type. This manhole should have clear opening of 1200 x 900 mm at top to facilitate lowering of buckets. 1.4.6 Flushing manholes:- Where it is not possible to obtain self-cleaning velocities due to flatness of the gradient specially at the top end of branch sewer which receive very little flow, it is essential that same form of flushing device be incorporated in the system. This can be done by making grooves at intervals of 45 to 50m in the main drains in which wooden planks are inserted & water allow to head up and which will rush on with great velocity when the planks are removed. Alternatively, an overhead water tanks is built, from which connection are made through pipe flushing hydrants to rush water to the sewer. The relevant Indian standard is IS:4111(part two). Flushing can be very conveniently accomplished by use of fire hydrant or tanker. Where flushing manhole is provided, they are located generally at the head of a sewer. Sufficient velocity shall be imparted in the sewer to wash away the deposited solid. The flush is usually effective up to a certain distance after which the imparted velocity gets dissipated. The automatic systems which are operated by mechanical units gets often corroded by the sewer gases and do not generally function satisfactorily and hence are not recommended. In case of hard chock ages in sewers, care should be exercised to be ensuring that there is no possibility or back flow of sewer into the water supply mains. Approximate quantities of water needed for flushing are as follows: - 200mm dia 250mm dia 300mm dia 1. 0.00502300 2500 3000 2. 0.00751500 1800 2300 3. 0.01001300 1500 2000 4. 0.0200500 800 1000 5. 0.0300400 500 700 2. Constructional Details:- Manhole is usually constructed directly over the centre line of the sewer they are usually constructed with brickwork. However in areas where sewers are to be laid in high water condition manhole shall be constructed in R.C.C. They are circular, rectangular or square in shape. Manholes should be of such size as will allow necessary cleaning and inspection of manholes. (a) Rectangular Manholes - The minimum internal sizes of rectangular manholes between brick face should be as follows: (i) For depth of manholes less than 0.9m, 900mm x 800mmand (ii) For depths of manholes from 0.9mm&upto 2.5m, 1200mmx 900mm (b) Arch type manholes - For depth of 2.5m and above, arch type manholes can be provided and the internal size of the chambers between brick faces shall be 1400mm x 900mm. The width of manhole chamber on bents and junction of pipes with diameter greater than 450mm should be suitably increased to 900mm or more so that benching width on either side of the channel to be at-least 200mm. 3. Circular manholes- Circular manholes are longer than rectangular and arch type manhole and thus there are preferred over rectangular as well as arch type manholes. The circular manholes can be provided for all depths starting from 0.9m circular manholes are straight down in lower portion and slanting in top portion so as to narrow down the top opening equal to internal dia. of manhole over. Depending upon the depth of manhole, the diameter of manhole changes. The internal diameter of circular manholes may be kept as following for verifying depths. (i) For depths 0.9m and up to 1.65mm, 900mm diameter (ii) For depths above 1.65m and up to 2.30m, 1200mm diameter (iii) For depths above 2.30m and up to 9.0m, 1500mm diameter. (iv) For depths above 9.0m and up to 14.0m, 1800mm diameter. Typical circular manholes are shown in fig.6 If the sewer is constructed in a tunnel, the manhole should be located at the access or working shaft and the manhole chamber maybe constructed of a size to suit the working shaft or vice-versa. The width /diameter of the manhole should not be less than internal diameter of the sewer +150mm benching as both sides (150mm+ 150mm) The opening for entry into the manhole (without cover) should be such minimum diameters as to allow a workman with the cleaning equipments into the interior of the manhole without difficulty. A minimum clear opening of 60cm preferably circular is recommended. Suitable steps usually cast iron shall be provided for entry. Access shaft for large sewers - Access shaft shall be circular in shape and shall have a minimum internal dia of 750mm, where the depth of the shaft exceeds 3m suitable dimensions shall be provided to facilitate cleaning and maintenance. Access shaft where built of brick work should be corbelled on three sides to reduce it to the size of the opening in the cover frame, and to provide easy access on the fourth side to step iron or ladder.In determining sizes the dimensions of the maintenance equipments likely to be used in sewer, shall be kept in view. Where the diameter of the sewer is increased, the crown of the entering leaving pipes shall be fixed at the same level and necessary slopes given in the inverted of the manholes chamber. In exceptional cases and where unavoidable the crown of the entering sewer maybe fixed at lower level but in each cases too the peak flow level of the two sewer shall be kept the same. A slab generally of plain cement concrete at least 150mm thick should be provided at the base to support the walls of the manhole and to prevent the entry of foul water. The thickness of the base also shall be suitably increased up to 300mm, for manholes on large dia sewers, with adequate reinforcement provided to withstand excessive uplift pressures. In the case of larger manholes, the flow in the sewer should be carried in U-Shaped smooth channelconstructed integrally with the concrete base of the manhole. The side of the channel should be equal to the dia. of the largest sewer pipe.The adjacent floor should have a slope of 1 in 10 draining to the channel. Where more than one sewer enters the manhole the flow through channel should be curved smoothly and should have sufficient capacity to carry the maximum flow. It is desirable to place the first pipe joint outside the manhole as close as practicable. The pipe shall be built inside the wall of the manhole flush with the internal periphery protected with an arch of masonry or cement concrete to prevent it from being crushed. The sidewalls of the manhole are usually constructed of cement brickwork 250mm thick and corbelled suitably to accommodate the frame of the manhole cover. The inside and outside of the brickwork should be plastered with cement mortar 1:3 (1 cement: 3 coarse sand) and inside finished smooth with a coat of neat cement. Where subsoil water condition exist, a richer mix may be used and it shall further be water proofed with addition of approved water proofing compound in a quantity as per manufacturer's specifications. 4. Covers and frames: The size of manhole covers should be such that there should be clear opening of not less than 560mm diameter for manholes exceeding 0.9m depths. When cast iron manhole covers and frames are used they shall conform to IS 1726 (parts 1 to 7). The frames of manhole shall be firmly embedded to correct alignment and level in plain concrete on the top of masonry. After completion of the work, manhole covers shall be sealed by means of thick grease. Where sewer are to be laid in high subsoil water conditions, manholes maybe constructed in R.C.C. of grade M 20 or 1:1.5:3. The manholes in this type of construction shall be preferably circular. Heavy reinforced concrete covers with suitable lifting arrangements could also be used instead of C.I manhole covers. However pre-cast cement concrete covers reinforced by materials other than mild steel should be used provided that those are properly tested & certified for use by competent authority. Fibre reinforcement plastic covers (FRP) conforming to relevant IS: may be used wherever such covers are available. 5. Inverted Syphon 5.1 Function and provision In the course of laying sewers, at times it is found necessary to cross obstructions like nallah etc. Such obstruction shall be crossed by means of "Inverted Syphon” i.e. by laying the sewer under the obstruction and regaining as much elevation as possible after the obstruction is passed. As the siphons are depressed below the hydraulic grade line, maintenance of self cleaning velocity at all flows is very important. Two considerations, which govern the profile of a siphon, are provision for hydraulic losses and case of cleaning. 5.2 Construction To ensure self-cleaning velocities for the wide variations in flows, generally, two or more pipes not less than 200mm dia are provided in parallel so that up to the average flows, first pipe is used and when the flow exceeds the average, the second and subsequent pipes take the balance flow. Siphons may need cleaning other than gravity sewers and hence should not have any sharp bends either horizontal or vertical. Only smooth curves of adequate radius should be used. The design criteria for inverted siphons are given in IS: 411 part -III. It is necessary to have a self-cleaning velocity of 1.0 mps for the minimum flow to avoid deposition in the line. Provision should be made for isolating the individual pipes as well as the syphon to facilitate cleaning. It is desirable to provide a course screen to prevent the entry of rags etc, into the syphon. 5.3 Inlet and outlet chambers:- In the multiple pipe syphon, the inlet should be such that the pipes coming to action successively as the flow increases. This may be achieved by providing lateral with heights kept in accordance with the depth of flow at which one or more siphon pipes functions. In the two-pipe siphon, the first should take 1.25 to 1.5 times the average flow and second should take the balance of the flow. A manhole at each end of the siphon should be provided with clearance for rodding. The design of inlet and outlet chambers should allow sufficient room for entry for cleaning and maintenance of siphons. The outlet chambers should be so designed as to prevent the flow of sewage into pipes, which are not being used at the time of minimum flow. 6. Hatch box: Hatch boxes of adequate size in manholes shall be provided on the pipes so as to give access into the pipes for rodding. 7. By pass: Proper by pass arrangements should be provided from the inlet chamber and if required special arrangements should be made for pumping the sewage to the lower reach of sewer line. Alternatively a vacuum pump maybe provided at the outlet to overcome maintenance problems arising out of dogging and silting of siphons. If it is possible a blow off may be installed at the low point to facilitate emergency maintenance operations. 8. Storm water inlets:- There are device meant to admit the surface runoff to the sewers and form a very important part of the systems. Their location and design should therefore be given careful considerations. Storm water inlets maybe categorised under three major groups viz. curb inlets, gutter inlets and combination inlets, each being either depressed or flush depending upon their elevation with reference to the pavement surface. The actual structure of an inlet is usually made of brickwork. Normallycast-iron gratings conforming to IS: 5961 shall be used. In case there is no vehicular traffic, fabricated steel gratings maybe used. The clear opening shall not be more than 25mm. The connecting pipe from the street inlet to the main street sewer should not be less than 200mm in dia. and should have sufficient slope. Maximum spacing of inlets would depend upon various conditions of road surface, size and type of inlet and rainfall. A maximum spacing of 30m is recommended. 9. Sewer ventilators:- In a modern, well designed sewerage system, there is no need to provide ventilation on such elaborate scale considered necessary in the past, especially with the present day policy to omit intercepting traps in house connections. The ventilating columns/shafts are not necessary where intercepting traps are not provided. It is necessary however, to make provision for the escape of air to take care of the exigencies of full flow and also to keep the sewage as fresh as possible especially in out fall sewers. In case of storm sewers providing ventilating manhole covers can do these. 9.1 Provision: Ventilating columns/ shafts shall be provided at an internal of 180m in all mains intercepting and outfall sewers, near the manholes. The connections of house drains to the sewer shall be allowed without the use of any intercepting trap and thus permitting ventilation of laterals and branch sewers via. House drains and their ventilating pipes. 9.2 Construction: - The ventilating shaft shall consist of vertical columns of R.C.C. or cast iron about 6 to 8 metre in height and about 100 to 150mm in diameter (opening) at the top, the diameter increasing uniformly towards the bottom for stability. The shaft shall be provided with a Crowell or fitted with a wire ground at the top. 10. This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates prepared on this USOR will include GST, as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. NOTES- 3. Sewerage Maintenance 1 Contractor is bound to follow the guide line of CPHEEO manual on sewerage & sewage treatment system (Part-B) issued by Ministry of Urban Development, New Delhi w.e.f. November 2013. 2 The tools, plant, machinery and pumps required for cleaning should be arranged by the contractor at his own cost. 3 The payment will be made after successful testing of line only. No payment will be made for testing work in pieces. 4 No payment will be made for dewatering whatsoever involve in cleaning of manhole & sewer line. The payment of Dat (temporary plugging of chambers) will be made for cleaning of chamber only in accordance with volume of pipes, manholes and drains. The rates of Dat are included in the SOR. 5 The manhole cover for replacement will be issued from the store & no extra payment will be made for loading, unloading and transportation of manhole cover with frame upto the work site. 6 The contractor shall be fully and solely responsible for making all safety arrangements pertaining to the work such as barricading, lighting, arrangement of gas masks, safety belts and oxygen cylinder etc. 7 Shifting of silt and garbage will be done as per the direction of the Engineer- incharge. 8 Providing and fixing of CI/SFRC manhole cover with frame may be replaced (if required) but the cover shall be as per ISI mark only. The payment will be made as per rates applicable in the USOR. 9 The rates for various works given in the unified schedule of rates include contractor profit over head expenses, water and T&P expenses. 10 Some poisonous & inflammable gases are observed in deep sewers manholes, to prevent any disaster due to trance gases, the safety of cleaning staff is the responsibility of the contractor. 11 The department is not responsible for any accident during cleaning of sewer line. The contractor is fully responsible for any compensation to labour or for any legal action arising due to the accident. 12 This USOR contains the rates of all the items without GST. GST shall be paid separately as per prevailing government norms as claimed by the contractor in his bill. All the estimates based on this USOR will include GST as an extra amount as per prevailing rates on the sum of the estimate to arrive at the gross amount. SALT GLAZED STONEWARE PIPES, SEWER APPURTENANCES 1. Salt Glazed Stoneware Pipes Rate 29.1 Providing and Laying and Jointing salt glazed stone ware (S.W.) pipes socket and spigot with stiff cement mortar 1:1 including testing of joints complete. 29.1.1 100 mm Meter 388.00 29.1.2 150 mm Meter 558.00 29.1.3 200 mm Meter 893.00 29.1.4 250 mm Meter 1342.00 29.1.5 300 mm Meter 1795.00 29.2 Labour only for Laying and Jointing salt glazed stone ware (S.W.) pipes S&S (socket and spigot) with stiff cement mortar 1:1 including testing of joints complete. 29.2.1 100mm Meter 84.00 29.2.2 150 mm Meter 121.00 29.2.3 200 mm Meter 143.00 29.2.4 250 mm Meter 194.00 29.2.5 300 mm Meter 225.00 29.3 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sand: 10 graded stone aggregate 40 mm nominal size) around S.W. pipe including bed concrete 15 cm thick i/c curing, testing etc. complete for 100 mm dia. to 300 mm dia pipe. (For type "Concrete Around") 29.3.1 100mm dia SW pipe Meter 282.00 29.3.2 150mm dia Meter 456.00 29.3.3 200mm dia Meter 536.00 29.3.4 250mm dia Meter 624.00 29.3.5 300mm dia Meter 720.00 29.4 Providing and laying cement concrete 1:5:10 (1 cement:5 fine sa`nd: 10 graded stone aggregate 40 mm nominal size) up to haunches of SW – pipes including bed concrete i/c curing, testing etc complete for 100mm to 300mm dia SW pipe For Type "Concrete up to Haunches ") 29.4.1 100mm dia pipe Meter 592.00 29.4.2 150mm dia Meter 724.00 29.4.3 200mm dia Meter 844.00 29.4.4 250mm dia Meter 976.00 29.4.5 300mm dia Meter 1121.00 29.5 Dismantling of old S.W. pipes including breaking of Rate joints and bed concrete stacking of useful materials near the site within 50 m lead and disposal of unserviceable materials in to municipal dumps: 29.5.1 100mm dia pipe Meter 36.00 29.5.2 150mm dia Meter 39.00 29.5.3 200mm dia Meter 42.00 29.5.4 250mm dia Meter 44.00 29.5.5 300mm dia Meter 47.00 2. Sewer Appurtenances Rate 29.6 Providing and fixing SW gully trap complete with CI grating, Brick masonry chamber in cement mortar 1:4 (1 cement: 4 fine sand) water tight CI cover with frame of 30x30cm size including necessary Excavation, cement concrete grade M-5 (Nominal Mix) with stone aggregate 40mm nominal size, fixing CI cover with frame in Cement concrete grade M-15 (Nominal Mix) with stone aggregate 20mm nominal size, 12 mm thick cement plaster 1:2 (1 cement: 2 coarse sand ) finished with a floating coat of neat cement complete. 29.6.1 100x100mm size "P" Gully Trap Chamber Each 2085.00 29.6.2 125x100mm size "p", "Q" or "S" type Gully trap chamber Each 2059.00 29.6.3 180x150mm size "P" or "S" type Each 2114.00 29.7 Constructing Brick Masonry Manhole in Cement Mortar 1:4 (1 cement: 4 fine sand) R.C.C. top slab 1:1.5:3 (1 cement: 1.5 coarse sand: 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:4:8 mix (1cement: 4 coarse sand: 8 graded stone aggregate 40mm nominal size) inside plastering 12mm thick with cement mortar 1:3 (1cement: 3 fine sand) finished with a floating coat of neat cement and making channels in CC 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size) including finishing the channel to shape, curing etc. (Excavation foot rest and external cement plaster shall be paid for separately) 29.7.1 Inside size 90x80 cm and 45 cm deep including CI cover with frame 455x610 mm internal dimensions Each 10457.00 total weight of cover and frames to be not less than (23+15) 38 kg. 29.7.2 Inside size 90x80 cm and 60 cm deep including CI Each 11501.00 Rate cover with frame 455x610mm internal dimensions total weight of cover and frames to be not less than (23+15) 38 kg 29.7.3 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (medium duty) 500mm Each 25628.00 internal diameter total weight of cover and frame to be not less than (58+58) 116 kg. 29.7.4 Inside size 120x90 cm and 90 cm deep Manhole including CI cover with frame (Heavy duty) 560 mm Each 33746.00 internal diameter total weight of cover and frame to be not less than (108+100) 208 kg. 29.8 Manhole for property (House) connection 29.8.1 Inside size 60x60 cm and 90 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 8777.00 frame i/c transportation etc. 600x600 mm size heavy duty. 29.8.2 Inside size 60x45 cm and 60 cm deep manhole with fixing of ISI marked pre cast RCC manhole cover & Each 7109.00 frame i/c transportation etc. 600x450 mm size heavy duty. 29.9 Extra for depth up to 1.00 m for man holes over item 15.260x45cm size manhole over item | Metre | 4,758.00 |
| 29.11.1 | Extra for depth for circular manholes over item 15.4Depth 2.65m to 4.25 m | Metre | 12,258.00 |
| 29.11.2 | Extra for depth for circular manholes over item 15.4Depth 4.25m to 9.75m | Metre | 16,854.00 |
| 29.12.2 | Constructing Brick Masonry Circular Man Hole 1200 mm internal dia at bottom & 560 mm dia at top in cement Mortar 1:4 (1 cement: 4 fine sand), inside Cement plaster 12 mm thick with cement mortar 1:3 (1 cement: 3 fine sand) finished with a floating coat of neat cement, foundation concrete 20 cm thick in 1:3:6 ( 1 cement: 3 coarse sand: 6 graded stone aggregate 40 mm nominal size ) and making channels in cement concrete 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size) finished with a floating coat of neat cement etc. all completeAdd extra for depth 1.65 to 2.30 mtr | Metre | 7,037.00 |
| 29.13.2 | Constructing Brick Masonry Circular Man Hole 900 mm internal dia at bottom & 560 mm dia at top in cement Mortar 1:4 (1 cement: 4 fine sand), inside Cement plaster 12 mm thick with cement mortar 1:3 (1 cement: 3 fine sand) finished with a floating coat of neat cement, foundation concrete 20 cm thick in 1:3:6 ( 1 cement: 3 fine sand: 6 graded stone aggregate 40 mm nominal size ) and making channels in cement concrete 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size) finished with a floating coat of neat cement etc. all completeAdd extra for depth 0.90 to 1.65 mtr | Each | 4,808.00 |
| 29.15.1 | Making connection of drain or sewer line with existing service lines Manhole including breaking into and making good the walls, floors etc. with cement concrete 1:2:4 (1 cement: 2 coarse sand: 4 graded stone aggregate 20mm nominal size), cement plastered with CM 1:3(1 cement: 3 coarse sand) finished with a floating coat of neat cement and making necessary channels etc. completeFor 100 to 200 mm dia pipes 29.10.2 For 250 to 300 mm dia pipes Each 423.00 29.10.3 For 350 to 450 mm dia pipes Each 717.00 | Each | 384.00 |
| 29.18.1 | Dismantling of manhole including R.C.C./C.C. top slab, CI / pre cast RCC cover with frame including stacking of useful materials near the site and disposal of Rate unserviceable materials into municipal dumps within 50 m leadManhole size 90x80 and 45 cm deep | Each | 831.00 |
| 29.18.2 | Dismantling of manhole including R.C.C./C.C. top slab, CI / pre cast RCC cover with frame including stacking of useful materials near the site and disposal of Rate unserviceable materials into municipal dumps within 50 m leadManhole size 90x80 and 60 cm deep | Each | 940.00 |
| 29.18.3 | Dismantling of manhole including R.C.C./C.C. top slab, CI / pre cast RCC cover with frame including stacking of useful materials near the site and disposal of Rate unserviceable materials into municipal dumps within 50 m leadManhole size 120x90 and 90 cm deep | Each | 1,536.00 |
| 29.18.4 | Dismantling of manhole including R.C.C./C.C. top slab, CI / pre cast RCC cover with frame including stacking of useful materials near the site and disposal of Rate unserviceable materials into municipal dumps within 50 m leadManholes size 60x45 and 60 cm deep | Each | 475.00 |
| 29.18.5 | Dismantling of manhole including R.C.C./C.C. top slab, CI / pre cast RCC cover with frame including stacking of useful materials near the site and disposal of Rate unserviceable materials into municipal dumps within 50 m leadManholes size 60x60 and 90 cm deep | Each | 680.00 |
| 29.19.1 | Extra for depth of manholes dismantlingManhole size 90x80 cm, depth above 60 cm | Metre | 622.00 |
| 29.19.2 | Extra for depth of manholes dismantlingManhole size 120x90cm, depth above 90 cm | Metre | 740.00 |
| 29.19.3 | Extra for depth of manholes dismantlingManholes size 60x45 cm, depth above 60 cm | Metre | 474.00 |
| 29.19.4 | Extra for depth of manholes dismantlingManholes size 60x60 cm, depth above 90 cm | Metre | 474.00 |
| 29.19.5 | Extra for depth of manholes dismantlingManhole 1.50 m dia circular and upto 2.65 m deep | Each | 3,506.00 |
| 29.19.6 | Extra for depth of manholes dismantlingManhole 1.20 m dia circular, and upto 1.65 m deep | Each | 2,193.00 |
| 29.19.7 | Extra for depth of manholes dismantlingManhole 0.90 m dia circular and upto 0.90 m deep | Each | 1,672.00 |
| 29.20.1 | Extra for depth of manholes dismantlingManhole 1.50 m dia circular, depth 2.65 to 4.25m | Metre | 1,402.00 |
| 29.20.2 | Extra for depth of manholes dismantlingManhole 1.50 m dia circular, depth 4.25 to 9.75m | Metre | 1,928.00 |
| 29.20.3 | Extra for depth of manholes dismantlingManhole 1.20 m dia circular, depth 1.65 to 2.30 m | Metre | 877.00 |
| 29.20.4 | Extra for depth of manholes dismantlingManhole 0.90 m dia circular, depth 0.90 to 1.65m | Metre | 669.00 |
| 29.25.1 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc500 mm dia. Extra heavy duty | Each | 1,683.00 |
| 29.25.2 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc560 mm dia. Extra heavy duty | Each | 2,090.00 |
| 29.25.3 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600mm dia. Extra heavy duty | Each | 2,554.00 |
| 29.25.4 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc500 mm dia. heavy duty Rate | Each | 2,496.00 |
| 29.25.5 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc560 mm dia. heavy duty | Each | 2,903.00 |
| 29.25.6 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 mm dia. heavy duty | Each | 3,193.00 |
| 29.25.7 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 x 900 mm size extra heavy duty | Each | 5,458.00 |
| 29.25.8 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 x 900 mm size heavy duty | Each | 4,819.00 |
| 29.25.9 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc450 x 900 mm size heavy duty | Each | 4,297.00 |
| 29.25.10 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc450 x 900 mm size extra heavy duty | Each | 3,948.00 |
| 29.25.11 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 x 600 mm size extra heavy duty | Each | 3,077.00 |
| 29.25.12 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 x 600 mm medium duty | Each | 2,554.00 |
| 29.25.13 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 x 450 mm size heavy duty | Each | 2,845.00 |
| 29.25.14 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc600 x 450 mm medium duty | Each | 2,845.00 |
| 29.25.15 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc450 x 450 mm size heavy duty | Each | 2,206.00 |
| 29.25.16 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover including frame and transporting at site, cost of all material etc450 x 450 mm medium duty | Each | 1,857.00 |
| 29.26.1 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc500 mm dia. Extra heavy duty | Each | 2,090.00 |
| 29.26.2 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc560 mm dia. Extra heavy duty | Each | 2,438.00 |
| 29.26.3 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600mm dia. Extra heavy duty | Each | 2,787.00 |
| 29.26.4 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc500 mm dia. heavy duty | Each | 1,683.00 |
| 29.26.5 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc560 mm dia. heavy duty | Each | 2,090.00 |
| 29.26.6 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600mm dia. heavy duty | Each | 2,554.00 |
| 29.26.7 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 900 mm size extra heavy duty | Each | 4,761.00 |
| 29.26.8 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 900 mm size heavy duty | Each | 4,413.00 |
| 29.26.9 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc450 x 900 mm size heavy duty | Each | 3,367.00 |
| 29.26.10 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 600 mm size extra heavy duty | Each | 2,496.00 |
| 29.26.11 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 600 size heavy duty | Each | 2,322.00 |
| 29.26.12 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 600 mm medium duty | Each | 1,683.00 |
| 29.26.13 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 450 mm size heavy duty | Each | 2,032.00 |
| 29.26.14 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc600 x 450 mm medium duty | Each | 1,683.00 |
| 29.26.15 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc450 x 450 mm heavy duty | Each | 1,451.00 |
| 29.26.16 | Providing & fixing of ISI marked pre cast reinforced cement concrete manhole cover without frame and transporting at site, cost of all material etc450 x 450 mm medium duty 3. Sewerage Maintenance Rate | Each | 1,219.00 |
| 29.27.1 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 500 mm dia size | Each | 33.00 |
| 29.27.2 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 560 mm dia size | Each | 41.00 |
| 29.27.3 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 600 mm dia size | Each | 49.00 |
| 29.27.4 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 450x900 mm size Rate | Each | 57.00 |
| 29.27.5 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 600x450 mm size | Each | 33.00 |
| 29.27.6 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 600x600 mm size | Each | 41.00 |
| 29.27.7 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 600x900 mm size | Each | 49.00 |
| 29.27.8 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeSFRC 1.2 x 0.9 mtr. Size | Each | 106.00 |
| 29.27.9 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeC.I. 560 mm dia size | Each | 49.00 |
| 29.27.10 | Lifting & placing of manhole cover during cleaning of chocked sewer line & manholeC.I. 1.2 x 0.9 mtr. Size Lifting & placing of manholes cover & frame including | Each | 122.00 |
| 29.28.1 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 500 mm dia size | Each | 91.00 |
| 29.28.2 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 560 mm dia size | Each | 107.00 |
| 29.28.3 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 600 mm dia size | Each | 123.00 |
| 29.28.4 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 450x900 mm size | Each | 148.00 |
| 29.28.5 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 600x450 mm size | Each | 91.00 |
| 29.28.6 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 600x600 mm size | Each | 107.00 |
| 29.28.7 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 600x900 mm size | Each | 123.00 |
| 29.28.8 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)SFRC 1.2 x 0.9 mtr. Size | Each | 214.00 |
| 29.28.9 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)C.I. 560 mm dia size | Each | 123.00 |
| 29.28.10 | dismantling of existing C.C. coping during Raising of manholes (civil work to be paid separately)C.I. 1.2 x 0.9 mtr. Size Replacement of SFRC manhole cover with frame or without frame of approved quality of any shape & | Each | 255.00 |
| 29.31.1.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering100 mm dia | Each | 682.00 |
| 29.31.1.2 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering150 mm dia | Each | 991.00 |
| 29.31.1.3 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering200 mm dia | Each | 994.00 |
| 29.31.1.4 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering250 mm dia | Each | 999.00 |
| 29.31.1.5 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering300 mm dia | Each | 1,004.00 |
| 29.31.2.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 1.5m to 3m or part100 mm dia to 300 mm | Each | 48.00 |
| 29.31.3.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 3m to 4.5 or part100 mm dia. to 300 mm | Each | 95.00 |
| 29.31.4.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 4.5 m to 6m or part100 mm dia to 300 mm Rate | Each | 143.00 |
| 29.31.5.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer350 mm dia | Each | 1,372.00 |
| 29.31.5.2 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer400 mm dia | Each | 1,380.00 |
| 29.31.5.3 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer450 mm dia | Each | 1,389.00 |
| 29.31.5.4 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer500 mm dia | Each | 1,395.00 |
| 29.31.6.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 1.5m to 3m or part350 mm dia to 500 mm | Each | 64.00 |
| 29.31.7.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 3m to 4.5 or part350 mm dia. to 500 mm | Each | 128.00 |
| 29.31.8.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 4.5 m to 6m or part350 mm dia to 500 mm | Each | 192.00 |
| 29.31.9.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 6 m to 7.5 m or part350 mm dia to 500 mm | Each | 256.00 |
| 29.31.10.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 7.5 m to 9 m or part350 mm dia to 500 mm | Each | 384.00 |
| 29.31.11.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer600 mm dia | Each | 1,938.00 |
| 29.31.11.2 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer700 mm dia | Each | 1,961.00 |
| 29.31.11.3 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer850 mm dia | Each | 1,989.00 |
| 29.31.11.4 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer900 mm dia | Each | 2,022.00 |
| 29.31.11.5 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer1000 mm dia | Each | 2,055.00 |
| 29.31.12.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 1.5m to 3m or part600 mm dia to 1000 mm | Each | 88.00 |
| 29.31.13.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 3m to 4.5 or part600 mm dia to 1000 mm | Each | 177.00 |
| 29.31.14.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 4.5 m to 6m or part600 mm dia to 1000 mm | Each | 265.00 |
| 29.31.15.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 6 m to 7.5 m or part600 mm dia to 1000 mm | Each | 354.00 |
| 29.31.16.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 7.5 m to 9 m or part600 mm dia to 1000 mm | Each | 643.00 |
| 29.31.17.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer1200 mm dia | Each | 2,720.00 |
| 29.31.17.2 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer1400 mm dia | Each | 2,842.00 |
| 29.31.17.3 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer1600 mm dia | Each | 2,955.00 |
| 29.31.17.4 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Depth upto 1.5 m for RCC Sewer1800 mm dia | Each | 3,083.00 |
| 29.31.18.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 1.5m to 3m or part1200 mm dia to 1800 mm | Each | 115.00 |
| 29.31.19.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 3m to 4.5 or part1200 mm dia to 1800 mm | Each | 230.00 |
| 29.31.20.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 4.5 m to 6m or part Rate1200 mm dia to 1800 mm | Each | 345.00 |
| 29.31.21.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 6 m to 7.5 m or part1200 mm dia to 1800 mm | Each | 460.00 |
| 29.31.22.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 7.5 m to 9 m or part1200 mm dia to 1800 mm | Each | 690.00 |
| 29.31.23.1 | manila rope, gunny bags, earth etc. or by and other plugging device with all required T & P and safety equipment including dewatering — Extra rate of depth 9 m to 10.5 m or part1200 mm dia to 1800 mm | Each | 920.00 |
| 29.33.2.3 | Extra rate for depth 4.5 m to 6m or part Rate | Metre | 9.00 |
| 29.33.9.4 | Extra rate for depth 6m to 7.5 m or part Rate | Metre | 111.00 |
| 29.33.15.2 | Extra rate for depth 3m to 4.5 m or part Rate | Metre | 127.00 |
| 29.33.18.7 | Extra rate for depth 10.5m to 12m or part Removing of all weeds and other growth with roots i/c refused material such as polythene, cloths, algae etc. from facultative pond of STP and disposal up to 50 mtr lead and 1.5 mtr lift as directed by Engineer in | Metre | 972.00 |
| 29.35.1 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc1. Distance 1 km | Cum | 108.00 |
| 29.35.2 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc2. Distance 2 km Rate | Cum | 125.00 |
| 29.35.3 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc3. Distance 3 km | Cum | 142.00 |
| 29.35.4 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc4. Distance 4 km | Cum | 159.00 |
| 29.35.5 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc5. Distance 5 km | Cum | 175.00 |
| 29.35.6 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc6. Beyond 5km upto 10km. add per km | Cum | 15.00 |
| 29.35.7 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc7. Beyond 10km. upto 20km. add per km | Cum | 13.00 |
| 29.35.8 | sewage components by me9+9+9chanical transport including loading unloading & stacking etc8. Beyond 20km. add per additional Drawings GENERAL ARRANGEMENT DRAWING FOR HOUSE HOLD CONNECTION FROM HDPE/GI/DI PIPE WITH GI/MDPE PIPE CONNECTION & PRE-FABRICATED CEMENT PLATFORM & STAND POST STAND POST G.I. PIPE ONLY SHALL BE USED AS VERTICAL PIPE BRASS WITH STAINLESS AT STAND POST STEEL COATING TAP (Min.Wt. 150 Gram) (15 MM DIA ) M.S. CLAMP TO HOLD G.I. PIPE COMPRESSION ELBOW/ G.I. ELBOW THIS PART SHALL NOT BE CONSIDERED WHERE ROAD CROSS IS NOT MET GL GL 100 MM THICK 1:1.5:3 CC GL SERVICE LINE 20 MM DIA MDPE/ 15 MM DIA GI PIPE UP TO CONSUMERS MTA ( MALE THREADED ADOPTER PREMISE AND THEN 15 MM DIA GI PIPE AT STAND POST MDPE (20 MM DIA)/15 MM G.I. PIPE SECTION AT X-X' FLOW CONTROL VALVE (5/10/15 LITRE/ MINUTE ) COMPRESSION ELBOW FOR MDPE/ UNION FOR G.I./D.I. PIPE ELECTRO FUSION SADDLE FOR HDPE FTA ( FEMALE THREADED ADOPTER ) For PIPE/STRAP SADDLE HDPE PIPE AND G.I. SPECIALS D.I/G.I PIPE FOR D.I. PIPE /MS X CLAMP FOR G.I. PIPE DI/GI/HDPE PIPE 4 HORIZONTAL AND 2 VERTICAL BAR 6 MM DIA WITH WIREMESH SATIN PCC 1:3:6 WHITE BLUE COLOUR COLOUR FHTC NO. 6 MM DIA 5 BAR WITH WIREMESH GL 6 MM DIA 4 BAR X' WITH WIREMESH 100 MM THICK 1:1.5:3 CC SIDE ELEVATION FRONT ELEVATION PLAN SCHEMATIC VIEW OF PRE CAST POST AND PLATFORM NOTES- FLOW CONTROL VALVE SIZE (5/10/15 LITRE / MIN) SHALL BE DECIDED ON THE BASIS OF THE DURATION OF DAILY SUPPLY OF WATER FONTS JJM LOGO AND TOP/ BOTTOM STRIP AS SHOWN IN FIGURE SHALL SATIN BLUE SYNTHETIC GENERAL ARRANGEMENT DRAWING FOR USOR CHAPTER NO. 09 ENAMEL PAINT (FOR REFERENCE PURPOSE SEE COLOUR CODE 0124 OF ASIAN PAINTS) ITEM NO. 9.37 TO 9.40 ALL DIMENSION IN MM RESISTIVITY SURVEY SCHEMATIC DIAGRAM Current Source Current Meter Electrodes Volt Meter A M N B Ground level Current Flow Through Soil Flow of Current Flow of Voltage 150/125/115 mm dia. Tubewell Casing Pipe 30cm 150mm Collapsible Strata In Over Burden 15cm Rock Rock Casing Pipe Collapsible Strata 125mm 15cm 115mm Rock Rock 200/150/125 mm dia. Tubewell Casing Pipe 30cm 200mm Collapsible Strata In Over Burden 15cm Rock 200mm Rock Casing Pipe Collapsible Strata 150mm 15cm 125mm Rock Rock Ordinary Tubewell 150 mm.dia or 200mm.dia Casing Pipe 30cm 150 mm or 200mm Collapsible Strata In Over Burden 15 cm Rock Rock Rock 150mm or 200mm Rock Ordinary Tubewell 125/115 mm.dia Casing Pipe 30cm 125mm Collapsible Strata In Over Burden 15 cm 115mm Rock Rock Gravel Pack Tubewell 300 or 350 or 400mm 300 350/400mm Casing Pipe Soil Slotted casing Water bearing Strata Casing Pipe Soil Water bearing Strata Gravel packing Slotted casing Bail plug Rock Figure-18 Chapter No.22 SOAKAGE PIT FOR HANDPUMPS 29nos. brick 22.5x7x11 Mix1:4 Earth or Sand 10 70 Dia Slope 1:50 8 From 8 handpump platform Line to of pit with bricks laid vertically on edge. 11 From handpump platform 7.5 Slope 1:50 225 Ground Level Stones Broken Brick or Gravel Pit 70 Dia, 100 Deep All units in Centimetres 80 Spout 100 1000 1850 80 Foundation 760x760x400 1000 Deep Head Assemble Third Plate Water Tank Stand Cement Conc Mix 1:2:4 Installation 3000min Mark 1000 100 To Drain or Soak Pit Slope 1:50 Ground 120 80 400 Notes:- Casing Pipe 1.The free end of casing pipe shall be minimum 300mm Riser Pipe above the installation mark Connecting Rod 2. Casing pipe is not required when the bore pipe Cylinder Assemble passes through rocks. 3. Separate platform for washing clothes/utensils and cattle ruffe may be provided if required. All dimensions in milimeters. Typical Set-Up Deepwell Handpump Chapter No.23 DRAWING FOR CONSTRUCTION OF RECHARGING PIT ONLY FOR CONSTRUCTION OF RECHARGING SHAFT IN SUBMERGENCE FTL/FRL-100 2.60 0.30-0.50 FB Bore Cap 2.60 75 R.L 0.30 2.00 2.00 0.30 75 mm Thick Coping 1:1.5:3 75 mm Thick Coping Sand 1:1.5:3 Brick masonry in 1:6 cm with 12mm tick 1:5 cement 0.45M plaster on exposed surface 0.25mm 0.50mm size Synthetic mesh to prevent sand penetration Gravel Nariyal rope tied 0.45M 5mm-10 mm size around the casing pipe BED level of pond R.L BED LEVEL OF POND Gravel 0.45 10mm-50 mm size M 1.00 Perforation in casing pipe 0.55 M R.L 96 0.10 0.10 0.15 0.15 0.50 0.50 2.80 150 MM DIA TUBE WELL 40 M DEEP Notes:- 1. All Dimension in meters 2. Minimum casing in recharge shaft shall be 9:00 or Upto hard strata it is to prevent entry of polluted water in aqufer 3. Rectangular pits internal size =2.00x2.00x1.35m not to scale Recharge shaft with vertical filter to be constructed in the submergence of reservoir DRAWING FOR CONSTRUCTION OF RECHARGING PIT AROUND TUBE WELL,IN SOFT/HARD ROCK AREA 3.0m Existing tube well Plan 150mm Dia bore cap 150mm Dia Casing pipe of Existing tube well 0.20 Ground Level Ground Level 0.10 Sand 0.40 90mm dia holes 0.25mm to 0.50mm size in steining Gravels 0.50 Synthetic mesh to 5mm10mm size prevent penetration Gravels 0.50 Perforation in 10mm to 50mm size casing pipe Gravels 0.50 50mm to 100mm size Nariyal rope tied around the casing pipe SECTIONAL ELEVATION Chapter No.26 All Dimension in meter DRAWING FOR CONSTRUCTION OF RECHARGING PIT WITH STEINING AND CATCH DRAIN AROUND TUBE WELL 4.0m 3.0m CATCH DRAIN EXISTING TUBE WELL 0.10 0.10 Plan 150mm Dia bore cap 150mm Dia Casing pipe of Existing tube well 0.20 0.20 Ground Level Ground Level 0.40 0.50 Sand 0.25mm to 0.50mm size 0.50 Gravels 0.50 Synthetic mesh to 5mm10mm size prevent penetration Perforation in Gravels 0.50 10mm to 50mm size casing pipe 100mm thick R.C.C. 0.50 steining M-20 Gravels 50mm to 100mm size Nariyal rope tied around the casing pipe SECTIONAL ELEVATION Chapter No.26 All Dimension in Meter BC=20cm min 0.25BC /10 CM Min BC=20cm min 1.25 BC 1.25 BC 30Cm Concrete Arch Plain or Reinforced Carefully concrete Tamped BC Compacted Granular Back Fill Material 0.25 BC min Plain or reinforced 0.25 BC concrete Concrete Cradle D 10 Cm MIN 0.25 Concrete Arch CLass A 30cm Carefully Compacted back fill Compacted Granular Material 0.25 BC Min Compacted Granular Bedding CLass B BC 15 cm 0.125 Bc 10cm Min Lightly compacted back fill Under barrel 0.17 Bc min Compacted Granular material Granular bedding CLass C Fig 1. CLASSES OF BEDDING FOR CONDUIT IN TRENCH Notes:- In Rock, Trecnch is Excavated Atleast 15 cm Below the bell of the except where concrete cradle is used. Chapter No.28 Horizontal Gulley grating with frame 500x450 C.C. 150 1:2:4 Cement B.W.IN C.M.1:5 Plaster 1:4 450 Pipe C.C. 150 1:5:10 75 230 450 230 75 1060 Road Gulley Chamber 450x500x600 (Horizontal) Figure-2 C.I.Cover 300x300 C.I.1:2:4 or Half Brick G 115 300 115 L 40 Cement Plaster Brick Work in C.M.1:5 100 S.W.Gulley S.X. Trap 100x100 875 C.C.1:5:10 C.I.Grating 75 100 C.C.1:5:10 680 Gulley trap Chamber For 100x100mm. Gully Trap Figure-3 Chapter No.29 R.C.C C.I.Cover 1:2:4 610 x 455 G 455 L 150 150 B.Work In C.M. 1:5 100 650 150 200 C.C.1:2:4 for Benching 50 200 C.C 1:4:8 75 230 900 230 75 Channel with concrete Man Hole 900x900x450 Figure - 4 500 C.I. Heavy duty M.H. Cover 150 R.C.C 1:2:4 L 150 G Cement Plaster 1:3 With floating coat Foot Rests of near cement 1200 1600 B.W.IN C.M.1:5 0200 300 C.C.1:2:4 Benching C.C.1:4:8 75 230 900 230 75 Man Hole 1200x900x900 Figure - 5 Chapter No.29 500 Man Hole Cover 230 C.C. 1:2:4 or 150 One Brick 525 Dia Brick In C.M.1:5 1950 1:2:4 Benching 700 250 400 50 C.C. 300 1:4:8 150 230 1500 Dia 150 230 2260 Dia Circular Type Man Hole Figure - 6 R.C.C. 1:2:4 75 Vertical Grating 100 Road Surtace Brick work 1:5 M.S.Flat 40X6mm 12 M.S. 600 Bars 150 C/C C.C.1:2:4 Pipe C.D. Blockes C.C. 150 1:5:10 75 230 450 230 75 1060 Road Gulley Chamber 400x450x775(Vertical Grating) Figure - 7 X Cement Mortar x Tarred gasket 4 Or Spun Yarn Socket in Neat Cement Slurry 45 1/2x X-Socket Lenght TYPICAL DETAIL OF CEMENT JOINTS FOR GLAZED STONEWARE PIPES X/2 D 1/4T I W Bedding W= D+X. where D is the external diameter of the pipe X= 300mm upto trench depth of 1200mm 400mm for trench depth more then 1200mm T= 100mm for pipes under 150mm 1/4th internal dia. subject to a min. of 150mm and max. 300mm. for pipes more than 150mm dia X/2 Tangential Line D Maximum Water Level W Concrete Upto haunches W= D+X. where D is the external diameter of the pipe X= 300mm upto trench depth of 1200mm 400mm for trench depth more than 1200mm T= 100mm for pipes under 150mm 1/4th internal dia. subject to a min. of 150mm and max. 300mm. for pipes more than 150mm dia X/2 X/2 W T W Concrete Alround W= 100mm for pipes under 150mm 1/4th internal dia. subject to a min. of 150mm and max. 300mm. for pipes more than 150mm dia. X= D+X. where D is the external diameter of the pipe T= 300mm upto trench depth of 1200mm 400mm for trench depth more than 1200mm | Cum | 10.00 |
Other chapters in this schedule
- Ductile Iron Pressure Pipes and Specials with Tyton Joints and DI Valve (669)
- Polyethylene Pipe and Fittings (209)
- Galvanized Iron Pipes, Specials and Gun Metal or Brass Fittings (354)
- Oriented P.V.C. (PVC-O) Pipes (13)
- M.S. Pipes, Specials, Fittings including Fabrication & Laying (75)
- Asbestos Cement Pressure Pipes and Cast Iron Fittings (16)
- Bar Wrapped Steel Cylinder Pipes (BWSC) (270)
- Cast Iron Socket and Spigot Pipes & Specials with Lead Joints, Tyton Joints, Cast Iron Pipes & Specials with Flanged Joints, Cast Iron Valves, Sluice Gate & Air Valves (351)
- Consumer Service Connection (131)
- Water Hammer Devices (96)
- Pumps (172)
- Measuring Devices (40)
- Miscellaneous (Water Supply) (73)
- Allied Civil Works (82)
- Intake Well Related Works (27)
- Ground Service Reservoir & Sump Tanks (GSR) (19)
- Construction of Gravel Packed Tube Well (5)
- Development, Yield Test and Disinfection of Tube Well (6)
- Unplasticized Non-Pressure Polyvinyl Chloride (PVC-U) Pipes, Double Wall Corrugated (DWC) Pipes for Use in Underground Sewerage System (32)
- Reinforced Cement Concrete Pipes (190)
Pricing salt glazed stoneware pipes, sewer appurtenances & sewerage maintenance against a live tender
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