Construction of Machine drilled hand pump well

Amount

Drilling of 125mm dia water well in collapsible strata conglomerate Boulder, Gravel Pebbles Slit, Clay, Rock, whatsoever formation encountered, using 115mm dia, Odex/DTH method and exploration of Ground Water by tapping sufficient aquifer Zones below ground level with simultaneous lowering of 125mm dia M.S Plain ended pipe duly chamfered/bevelled and welding face to face, the job accessories, tools, attachments POLS, consumable, both skilled and unskilled labourers reqd. the job includes the cost of casing driving shoes of adequate hardness. BHN suitable for all strata. It also includes the cost of development of well with suitable air compressor to clean the tapped water from all the suspended impurities. The job includes the cost of slotting and lowering of the requisite casing upto the drilling depth. The specifications of the bore well shall be as under; i) Min. dia of the each bore well…….. 125mm ii) Max. depth of each bore…….. 65 m iii) Dia. Of MS pipe to be used……… 125mm iv) Class of pipe……….. “C” Class v) Sample collection of strata to be collected for examination…………. after every 10 feet. vi) Drilling/boring method to be used……. Air Rotary (preferably) Providing, fitting and lowering of 125mm dia (Nominal) MS casing pipe. The pipe shall be plane and bevelled ended. The pipe shall be lowered up to the desired level BGL. The average length of each pipe shall not exceed 3.00 Mts. The welding electrodes used for welding the pipe shall confirm to relevant IS codes.

Providing, fitting, installation, testing and commissioning of Mark II hand pump Assembly comprising of cylinder, Head, Handle Assembly, front cover, Handle-Axel, washer Nuts and Bolts, riser pipes and connecting rods.

Providing and laying of circular cement block of 1.5m dia and 0.3 m (1ft) deep in a mix of 1:3:6 to adequate the strength to act as sanitary block for the well and grout the hand pump assembly in order to make it robust to resist shock load observed while pumping not available the surface area is adjusted accordingly. The block comprises mud mat of 4 inch height and then laying of 8 inch cement concrete with suitable drainage.

M/S GOLDEN ENGINEERING BORE WELLS

M/S AH TUBE WELLS