Description: FOR CONSTRUCTION OF PIEZOMETERS 810 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 69 piezometer wells in Bihar BR PZ BOQ 1 Soft Rock 100 m
Details: Drilling of pilot hole using bentonite fluid for Piezometer 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 recordings Electrical logging using 406 mm and 1626 mm (16" and 64") SP resistivity probe, Natural gamma logging , to target depth of minimum 100m submission of report including zone wise water quality and preparation of composite log along with video recordings of hole by reaming in Pz to accommodate well assembly of recommended size and gravel envelop of minimum 100 mm thickness as given below Using 381 mm ( 15”) RR Bit for 150 mm (6”) assembly pipe Supply and installation of ERW casing pipe conforming to latest version of IS: 4270-2001 of diameter and thickness given below 150 mm (6”) Nominal Bo,re thickness 5.4mm Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimensions 150 mm (6”)
Sector: Ground Water Dept