Construction of Hand Pump wells at various locations in District Shopian As per annexure A

Amount

Drilling of the hand pump well air rotary drilling Rig unit suitable for lowering MS Casing of 125mm dia in suitably drilled bore hole as per specification laid down in IS 2800 (Part-I) with up to date amendments. The job is to be done in all kinds of soils, boulder, rocks collapsible strata, saturated soils, artisan conditions by ODEX/DTH attachments including the cost of all consumables, like fuel, lubricants and other accessories complete in all respects whole in consolidated/semi consolidated/boulder formation up to desired depth. The job also includes the cost of pipe materials, (MS 125mm) 5.4MM thickness and lowering of casing assembly, and its subsequent welding after every ten feet, up to the drilled/desired depth. The casing is to be slotted as per the site requirement. The Job includes following activities and the items. Collection of soil samples. Power supply arrangement required during drilling etc. P/F of well cap as per IS code 2800 with latest/up to date amendments, till the bore hole well is hammered Recording the strata details in the Drilling Job card. Development of tube well with back wash method with air compressor of minimum capacity 1000 CFM (300 PSI air delivery system) with suitable arrangements till well is thoroughly developed in all respects as per the direction of in-charge Engineer. iii. Dia. Of MS pipe to be used………125mm iv. Acceptable make of pipe………..jindal/prakash surya v. Class of pipe……….. “C” Class vi. Sample collection of starta to be collected for examination………….after every 10 feet. vii. Drilling/boring method to be used…….Air Rotary (preferably) The pipe shall be plane and beveled 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. Note: The pipe shall be provided by the firm and is inclusive of all taxes and the depth of each well shall not be more than 60 m.

Supply, Installation testing and commissioning of India Mark II hand pumps assembly comprising of cylinder, Head, Handle assembly, front cover, Handle-Axle, washers bolt, risers & the connecting rods. The minimum submergence of the cylinder shall not be less than 30 ft and the number of connecting rods and the risers shall depend on the drilling depth of the well and the SWL of the well.

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 hight and then laying of 8 inch cement concrete with suitable drainage.

M/S AH TUBE WELLS