Details: field investigation drilling of bore hole in all types of strata from existing ground level and soil a) gl to 10m b) 10m to 20m c) 20 m to 30m drilling in boulder strarta required by diamond bits/cutters.drilling nx/nq size borehole (76 mm dia) in boulder strata (n value as per the relevant statndards). this also includes :(i) collection of core sample (54 mm for nx size 48 mm for nq size) from boreholes and preparation of boreholes records geological section as per is 4464 and water smaples and (ii) carryout insitu test as per the specifications which will be paid item-b. drilling in rock required cutting by diamond bits/cutters a) in weathered rock b) in hard rock carry out spt tests collecting disturbed samples collecting undisturbed samples conducting permeability test in soil a) in soil in over burden using falling head b) in rock with packers collecting water samples laboratory test (soil samples) sieve analysis hydrometer analysis specific gravity moisture content dry density
Sector: Railways