Bengaluru Water Supply And Sewerage Board Tender

No4 - Earth work excavation for pipeline trenches in all kinds of soils by mechanical means above 600 mm (Depth upto 1.50m not exceeding 1.5m in width ) trench width as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & bonding rods at every 100 mm wherever necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required, utilising the available excavated earth locally for the work etc., and all other appurtenances complete in the following strata.Depth upto 1.50 m. a)400 mm dia RCC NP3 line

No5 - 400 mm dia RCC NP3 line- Depth exceeding 1.50m to 3.00m

No6 - 300 mm dia RCC NP3 line-Depth upto 1.50 m.

No7 - 300 mm dia RCC NP3 line depth exceeding 1.50m to 3.00m

No8 - 230 mm dia RCC NP3 line-Depth upto 1.50 m.

No9 - Providing S&S RCC SPUN / VIBRATED CAST PIPES (REINFORCED) pipes NP-3 Class conforming to IS:458-1988 with latest amentments using ordinary portland cement, for sanitary works and conveying to work site, rolling and lowering into trenches, laying true to line and level including loading and unloading at both destinations and jointing of pipes and specials, perfect linking of joints with jack to correct position including cost of jointing materials, i.e, rubber rings conforming to IS: 5382 for S&S RCC pipes, with all leads and lifts as directed and giving necessary hydraulic test as per ISS to the required pressure and commissioning etc. complete. (Contractor will make his own arrangements for procuring water for testing). Before the execution of the work, the contractor shall carry out the survey: RCC NP3 Class pipe of a)400 mm dia RCC NP3.

No10 - 300 mm dia RCC NP3 line

No11 - Providing lowering laying, jointing, testing and commissioning of 230 mm diameters glazed stone water pipes, conforming to IS 651:1992, (with 5th revision) in all respects jointing with EPDM rubber rings (seals according to EN 681 & ASPM 425) The rubber seals joints pipe will have groves in interior of socket and exterior of the spigot. The rubber gasket whll be prefixed at the factory by the manufacturer rigidly iwht approved glue to have leak proof joint including conveying to worksite and rolling and lowering into trenches, laying true to line, level and perfect linking at joints testing and commissioning including loading and unloading at both destinations and cuts of pipes wherver c\necessary including jointing of GSW ipes and specials, with rubber wherever necessary including jointing of GSW pipes and specials, iwth rubber gaskets conforming to EN 681 and ASTM C 425 including cleaning the socket and spygot iwth soap solution and applying talcum powder for detecting crack, then applying then applying glue and before insertingh of rubber gaskets, jacking and fixing in perfect conditiong including the cost of soap solution, talcum powder and glue etc. and giving necessary hydraulic test to the required pressure of water head with all lead and lifts including costing of jointing materials and all necessary survey works for laying of sewers etc., and disposal of debris as directed etc., complete (Contractor will make his own arrangements for procuring for testing) with Rubber ring gasket joints.230 mm dia SW line

No12 - Refilling available earth around trenches/pipelines, cables in layers not exceeding 20 cm in depth, compacting each deposited layer by ramming after watering with a lead upto 50 m , and lift upto 1.5 m. Including cost of all labour complete as per specifications

No13 - Wet Mix Macadam (Plant Mix Method) Providing, laying, spreading and compacting graded stone aggregate to wet mix macadam specification including premixing the Material with water at OMC in mechanical mix plant carriage of mixed Material by tipper to site, laying in uniform layers with paver/grader in sub-base / base course on well prepared surface and compacting with vibratory roller to achieve the desired density.

No14 - Providing and laying in position Cement Concrete for levelling course for all works in foundation. The granite/trap/basalt crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed, laid in layers not exceeding 150 mm thickness, well compacted using plate vibrators, including all lead & lifts, cost of all materials of quality, labour, Usage charges of machinery, curing, and all the other appurtenances required to complete the work as per technical specifications. Mix 1:3:6 Using 20 mm nominal size graded crushed coarse aggregates

No15 - Construct Brick masonry in CM 1:4, 340 mm thick, with wirecut bricks of approved quality, plaster inside and out side with CM 1:3, 12mm thick, except for the conical surface outside where the plaster thickness shall be 20mm. Slope inside to be 1:6 in the concrete towards central drain and finished smooth. Fixing of pipes in CC 1:2:4 with graded metal of 20mm and down size. Providing and fixing SFRC Machinehole frame and cover (Heavy Duty) conforming to IS:12592 with latest amendment, in CC 1:2:4. Providing and fixing footsteps made of 12mm dia. steel bars (Fe-500)with 3mm thick plastic encapsulation (IS-10910). The footsteps shall be fixed 30cms apart and on CC block embeded to masonry wall. The wholeworks include watering, curing, barricading, danger lighting, pouring tar over MH frame and cover, cost of tar, shoring, strutting, de-watering,engraving Machinehole number with flow direction on the inner conical surface etc. as per the drawing etc. as per technical specifications and for the following diameters and depth etc. for 1.2mm dia. B M.H: a)1.00m depth

No16 - For every 0.1 mtr depth upto 1.00m to 2.00m

No17 - 2.00m depth

No18 - For every 0.1 mtr depth upto 1.00m to 2.00m

No19 - Dismantling the damaged or collapsed Machinehole ,conical in shape, and reconstructing the same for the same dimensions, with machine made wire cut brick in CM 1:4 with ordinary portland cement etc. as per design and specifications. The existing ring, cover and CC beeding to be used. For 1.2M dia . a)2.8m depth

No20 - Removal of Unserviceable Soil with Disposal upto a suitable distance as directed by the Engineer incharge of work

No21 - Conducting Topographical GIS survey for the proposed Water Supply / UGD scheme to the city / town with latest total station survey equipments. The work shall include collection of field data from localbody, conducting detailed survey showing the all important land marks,existing water supply lines, sewer lines, all roads, levels, nature of roads,L-section survey for transmission main/ feeders/sub-feeder/ rising main from Jack well to WTP and WTP to OHT's and distribution network inlcuding clearing the obstructions, with all survey staff required covering all the developed & newly developed layouts or L-section survey for Sub-Main/Mains/Trunk ewer/Rising main from wetwell to STP inlcuding clearing the obstructions, with all survey staff required covering all the developed & newly developed layouts with submission of Soft copy of drawings along with source file and Hard Copy in 3 sets for the following: