Description: CONSTRUCTION OF PIEZOMETERS 1004 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 34 piezometer wells in Delhi DL PZ BOQ 1 Soft Rock 50 m
Details: Drilling of pilot hole for PZ not larger than 216mm (8 1⁄2 “ by rock roller/ drag bit including sample collection and preparation of litholog Electrical Logging using 406mm and 1626mm (16'' and 64''), SP registivity probe and Natural Gamma logging, preparation of litholog, submission of report including zone wise water quality along with logging graphs, composite log etc. of hole by reaming in PZ to accommodate well assembly of recommended size and gravel envelope of minimum 100 mm thickness as given below Using 250 mm (10') RR Bit for 100 mm(4”) assembly pipe (for 50m depth Pzs) Supply and Installation of ERW casing pipe conforming to Table 3 of latest version of IS: 4270-2001 of diameter and thickness given below 100mm (4”) Nominal Bore thickness 5.4mm Supply and installation of LCG V- wire screen conforming to latest version of IS: 8110-2000 of dimension given below 100mm (4”) Normal Size thickness 7mm with slot opening size 1.0 mm Supply and shrouding 01 pea gravel confirming
Sector: Ground Water Dept