Name of Work:-M/o pump & E.I. at various places at DwarkaSH :-Redevelopment of Existing bores by compressor/DTH System at various parks of horticulture division -Dwarka.
Sl. No.
Item Description
1
Development of tube well in accordance with IS : 2800 (part I) and IS:11189, to establish maximum rate of usable water yield without sand content (beyond permissible limit), with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by \"V\" notch method or any other approved method, measuring static level & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, i/c disinfection of tubewell, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charge.(DSR (Civil-2021) : 23.12)
2
Boring/drilling bore well of required dia for casing/ strainer pipe, by suitable method prescribed in IS: 2800 (part I), including collecting samples from different strata, preparing and submitting strata chart/ bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job, all complete as per direction of Engineer-in-charge, upto 90 metre depth below ground level (By DTH System).a)Rocky strata including Boulders upto 300mm dia.(DSR (Civil-2021) : 23.1.2.1)
3
Providing and fixing suitable size threaded mild steel cap or spot welded plate to the top of bore well housing/ casing pipe, removable as per requirement, all complete for borewell of a) 200 mm dia(DSR (Civil-2021) : 23.13.3)
4
Gravel packing in tubewell construction in accordance with IS: 4097, including providing gravel fine/medium/coarse, in required grading & sizes as per actual requirement, all complete as per direction of Engineer- in-charge.(DSR (Civil-2021) : 23.8)
5
Supplying,assembling,lowering and fixing in vertical position in bore well, ERW(Electric Resistance Welded) FE 410 mild steel screwed and socketed/ plain ended casing pipes of required dia, conforming to IS;4270, of reputed & approved make, including painted with outside surface with two coats of anticorrosive paint of approved brand and manufacture, including required hire & labour charges, fittings & accessories, all complete, for all depths, as per direction of Engineer-in- charge.(a)200 mm nominal size dia having minimm wall thickness 5.40 mm(DSR (Civil-2021) : 23.10.3)
6
Providing and fixing M.S. clamp of required dia to the top of casing/ housing pipe of tubewell as per IS: 2800 (part I), including necessary bolts & nuts of required size complete.a) 200 mm clamp(DSR (Civil-2021) : 23.14.3)
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