Bengaluru Water Supply And Sewerage Board Tender

a02.2 - Depth exceeding 3.0 m, but not exceeding 4.50 m

a03 - Earth work excavation for pipeline trenches by mechanical means 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 and all other appurtenances to complete in the following strata. Ordinary/soft rock (without requiring blasting) Depth exceeding 1.5 m, but not exceeding 3 m

a03.1 - Depth exceeding 3 m, but not exceeding 4.50 m

a04 - Providing and Filling in foundation with granite / trap broken metal 100mm and down size with approved M-Sand including hand packing, ramming, watering including cost of all materials and labour with all lead and lift complete as per specifications.

a05 - Providing M-Sand : Supplying and filling in plinth, foundations / UG cable work with approved M-sand including watering, ramming, consolidating and dressing. The rate includes the cost of material, labour charges, required tools and plants etc., complete. Work shall be carried out as per the instructions of Engineer- in-charge of works as per the standard procedure

a06 - 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 . RCC NP3 Class pipe of 600 mm dia

a06.1 - RCC NP3 Class pipe of 300 mm dia

a07 - Providing and constructing "WIRE CUT BRICK MACHINEHOLE CHAMBERS" using Portland/Pozzolana cement, conical in shape at top, with CC 1:3:6 foundation using 40mm and down size graded metal of approved quality and with an offset of 0.15M alround the chamber. 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 whole works 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 1.2m dia Man holes 1.mt dept

a07.1 - 1.2m dia Man holes 1.4.mt dept

a07.2 - 1.2m dia Man holes 1.5 mt dept

a07.3 - 1.2m dia Man holes 1.6.mt dept

a07.4 - 1.2m dia Man holes 1.7.mt dept

a07.5 - 1.2m dia Man holes 1.8.mt dept

a07.6 - 1.2m dia Man holes 1.9.mt dept

a07.7 - 1.2m dia Man holes 2.0.mt dept

a07.8 - For every 0.1mt depth 2 to 3 mt

a07.9 - 1.2m dia Man holes 3.mt dept

a07.10 - For every 0.1mt depth 3 to 4 mt

a08 - Providing, filling and laying of sand bags filled with sand / clay for diversion of sewage during execution of work.

a09 - Dewatering the sewage / storm water by using reqired HP submersible pump for the diversion of storm / sewage during the execution of work. Considering for one Pump.of 20hp

a10 - Refilling available earth around trenches/pipelines, cables in layers not exceeding 20 cms 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

a11 - Removal of Unserviceable Soil with Disposal upto a suitable distance as directed by the Engineer incharge of work

a12 - 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.

a13 - Providing and laying in position Cement Concrete for all Super structures of building , Road works, Water works, Irrigation works & super structure works of bridges upto 3.50 m height. The granite/trap/basalt crushed graded coarse aggregates and fine aggregates as per relevant IS Codes machine mixed with super plasticisers laid in layers, well compacted using needle vibrators. The cost includes all lead & lifts, cost of all materials, quality confirming to the requirements of relevant IS codes , labour, Usage charges of machinery, curin and all other appurtenances required to complete the work as per technical specifications. M30 Design Mix Using 20 mm nominal size graded crushed coarse aggregates