Description: FOR CONSTRUCTION OF PIEZOMETERS 1011 NOS IN SOFT ROCK HARD ROCK AND SUPPLY INSTALLATION COMMISSIONING OF DWLRS AND TELEMETRY ESTABLISHMENT OF DATA ACQUISITION SYSTEM and ITS MAINTENANCE FOR REAL TIME GROUND WATER LEVEL MONITORING Name of Work Construction of 41 piezometer wells in Gujarat GJ PZ BOQ 1 Soft Rock 65 m
Details: Drilling of pilot hole for PZ using bentonite fluid 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 along with video recording. Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe , Natural gamma logging to traget depth of maximum 300 m , submission of report including zone wise water quality ,logging graph, interpretation of graph composite log along with video recording. Drilling of Hole for PZ by rock roller/ drag bit of size given below to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness,including formation sample collection at every 3m and change in formation , preparation and submission of litholog along with video recording. Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe Supply and installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2
Sector: Ground Water Dept