Bengaluru Water Supply And Sewerage Board Tender

a004 - Depth Upto 4.50 meter

a005 - Depth Upto 6.0 meter

a006 - Depth Upto 6.0 Meter

a007 - Providing and laying in position plain 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 machineries, curing, and all the other appurtenances required to complete the work as per technical specifications. (The cost of steel reinforcement & formwork shall be paid separately)

a008 - Providing S and S RCC SPUN bar VIBRATED CAST PIPES REINFORCED pipes NP3 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 and 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 Pipeline 1000mm

a009 - Construction of RCC Machinehole chambers of 1 1 5 3 proportion or approved type Cast insitu Pre cast RCC Machinehole chambers constructed using form vibrators of standard type with barricading danger lighting and using of sight rails and boning rods wherever necessary shoring and strutting wherever required using Ordinary Port Land Cement, using 1 1 5 3 proportion RCC with 20 mm and down graded jelly well graded sand and steel of approved quality 200 mm thick top concrete slab having wall thickness and raft thickness as in approved drawings and with an offset in raft alround the chamber as in approved drawing, benching concrete with 1 6 slope towards the central drain finished smooth, including fixing and grouting of pipes including conveying to work spot supply and fixing SFRC Machinehole cover and frame Heavy duty conforming to IS 12592 with latest amendments on a bed of CC 1 2 4 supplying and fixing of minimum 3 mm thick encapsulated plastic footsteps as per IS 10910 on 12 mm dia Grade Fe 500 steel bar as per IS 1786 staggered at 300 mm apart as detailed in Technical specifications including stone grit beding wherever required watering curing engraving Machinehole number with flow direction on the inner cylindrical surface etc complete including cost of reinforcement steel and fabrication charges and also cost and conveyance of all materials labour with all lead and lifts The Pre cast RCC Machinehole are for various diamters and depths as stated below and as per detailed drawings specifications and direction of the Engineer Constructing Pre cast RCC Machinehole 1 8 m internal dia. 5 0 M depth and SFRC cover and frame

a010 - 0 1 depth to 5 to 6 meter

a011 - 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 Machinehole of 1 5M dia and 5 0 M depth

a012 - Providing filling and laying of sand bags filled with sand clay for diversion of sewage during execution of work

a013 - 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

a014 - Refilling available earth around trenches bar 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

a015 - Removal of Unserviceable Soil with Disposal upto a suitable distance as directed by the Engineer incharge of work

a016 - 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 bar grader in sub base bar base course on well prepared surface and compacting with vibratory roller to achieve the desired density

a017 - Providing and laying in Cement Concrete for all Basement and surface level works return walls retaining walls sunken floors etc The granite bar trap bar 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 providing weep holes wherever necessary including all lead and lifts cost of all materials of quality labour Usage charges of machinery curing and all other appurtenances required to complete the work as per technical specifications