Description: CONSTRUCTION OF PIEZOMETERS 116 NOS IN SOFT ROCK HARD ROCK BOULDERY FORMATION IN THE KASHMIR DIVISION OF UT OF JAMMU AND KASHMIR Name of Work Construction of 91 piezometer wells in Kashmir KS PZ BOQ 1 Soft Rock 100 m
Details: Drilling of pilot hole using bentonite fluid for PZ not larger than 216 mm (8 ½”) by rock roller/ drag bit including formation sample collection at every 3m and change in formation , preparation and submission of litholog Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe to target depth, submission of report including zone-wise water quality, logging graph, interpretation of graph, generation of composite log. Enlargement of hole by reaming in Piezometer to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below Using 311.15 mm ( 12-1/4”) RR Bit for 100 mm (4”) assembly pipe 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 :8110-9
Sector: Ground Water Dept