Geotechnical Investigation for FF-Annex Building in BARC, Tarapur

Cleaning Jungle including uprooting of rank vegetation, grass brush wood, trees and saplings and removal of rubbish up to a distance of 50m / outside the periphery of the area cleared as per specifications to facilitate geotechnical investigation and as directed by Engineer-in-Charge. (Area required for investigation alone to be cleared).

Setting up of boring rig at each location , only once for each borehole location including moves between borehole positions, locating and marking the location on the ground by actual survey, setting up all field test equipment and bringing all personnel to the location, making area good for setting up rig etc. complete. Any criss-cross or back and forth movement of the rig can take place, all as per specification & drawing and as directed by the Engineer-in-charge.

Boring vertically through all kinds of soils, weathered rock and soft rock/boulders if any, met during drilling with suitable and adequate equipment of diameter 116 / 150 mm or more for all depths measured below existing ground level at rig location, casing shall be provided wherever required & as directed by Engineer-In-Charge.

0m to 20m. From G.L

20m to 40m. From G.L

Recovering undistrubed soil / rock samples from every change in stratum or for every 1.5m stratum depth, whichever is less in bore holes and / or trial pits, including capping, waxing, labelling, storing and dispatching to the laboratory as specified complete in all respects conforming to ASTM D-1587.

Conducting Standard Penetration Tests (SPT) soil & soft and weathered rock at every change in stratum or 1.5m, whichever is less, as per IS:2131, and collecting, packaging and labelling disturbed soil/rock samples above and with a part of the distrubed soil samples from SPT sampler to be sealed immediately after collection to completely retain all moisture within the sample ( to be used in laboratory for Grain Sieve Analysis, hydrometer or pipette analysis, Liquid Limit, Plastic Limit, Plastic Index, Specific Gravity, chemical analysis and any other tests), and other part of the sample to be collected, packaged, sealed, labelled and to be placed in core boxes all as per specifications and as directed by Engineer-In-Charge.

Conducting standard penetration test in the bore holes (for total depth of the bore) at every 1.5 m interval from the desired elevation conforming to ASTM D-1586 including cost of all accessories and arranging of cores from depths as obtained.

Conducting Standard Penetration Tests (SPT) in rock with RQD greater than 10% and less than up to 25% as per IS:2131, including replacement of SPT shoe by a new SPT shoe for each SPT all as per specifications and as directed by Engineer-In-Charge.