Description: CONSTRUCTION OF PIEZOMETERS 61 NOS IN HARD ROCK BOULDARY IN THE UT OF LADDAKH Name of Work Construction of 61 piezometer wells in Laddakh LD PZ BOQ 1 Hard Rock Bouldery 100 m
Details: Drilling of pilot hole using ODEX for PZ not larger than 216 mm (8 ½”) by button bit including formation sample collection at every 1m and change in formation , preparation and submission of litholog. Drilling by DTH method using appropriate sizes of button bits so as to reach targeted depth with diameter of hole not less than 165 mm at 100 m depth and final diameter not less than 152 mm at bottom of holes/150 m depth including sample collection and prepartion of litholog Caliper logging to decipher the depth and width of fracture zones, submission of report including logging graph, interpretation of graph, generation of composite log along with video recording Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below 100 mm (4”) Nominal Bore, thickness 5.4mm " Supply and intallation of Stainless Steel 4"(100 mm) dia. x 0.75 mm slot size regular Grade ERW Stainless Steel Cage Type V-wire wound screen as per IS
Sector: Ground Water Dept