Name of work:- Balance work of Geotechnical Investigation and all other ancillary works under the jurisdiction of Dy CE/Con-1/ER/Asansol.

Extra over Item No. 021010 of ERUSSOR 2021 for drilling in bore hole in weathered rock with extra effort in lieu of soil against exploratory drilling of boreholes down to in all type of 001 soils except hard rock & large boulders (boulder core more than 30CM ) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chieselling tool for advancing through occasional seams of hard strata to be employed where necessary in Dry area. (0m to 10m)

Extra over Item No. 021010 of ERUSSOR 2021 for drilling in bore hole in weathered rock with extra effort in lieu of soil against exploratory drilling of boreholes down to in all type of 002 soils except hard rock & large boulders (boulder core more than 30CM ) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chieselling tool for advancing through occasional seams of hard strata to be employed where necessary in Dry area. (10m to 20m)

Extra over Item No. 021010 of ERUSSOR 2021 for drilling in bore hole in weathered rock with extra effort in lieu of soil against exploratory drilling of boreholes down to in all type of 003 soils except hard rock & large boulders (boulder core more than 30CM ) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chieselling tool for advancing through occasional seams of hard strata to be employed where necessary in Dry area. (20m to 30m) Above/

Exploratory drilling of boreholes down to required depth, drilling of 150mm dia. 001 boreholes in all type of soils except hard rock & large boulders (boulder core more than 30cm) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion/chiselling tool for advancing through occasional seams of hard strata to be employed, where necessary in Dry area. 0m to 10m

Exploratory drilling of boreholes down to required depth, drilling of 150mm dia. 002 boreholes in all type of soils except hard rock & large boulders (boulder core more than 30cm) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion/chiselling tool for advancing through occasional seams of hard strata to be employed, where necessary in Dry area. 10m to 20m

Exploratory drilling of boreholes down to required depth, drilling of 150mm dia. 003 boreholes in all type of soils except hard rock & large boulders (boulder core more than 30cm) including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion/chiselling tool for advancing through occasional seams of hard strata to be employed, where necessary in Dry area. 20m to 30m

Exploratory drilling of Boreholes down to required depth, drilling of 150mm diameter boreholes in all type of soils except hard rock and large boulders (boulder core more than 30cm), 004 including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chiselling tool for advancing through occasional seams of hard strata to be employed where necessary in River bed area including standing/flowing water with all necessary arrangements except making of platform under water which shall be paid under relevant item of SOR. 0m to 10m

Exploratory drilling of Boreholes down to required depth, drilling of 150mm diameter boreholes in all type of soils except hard rock and large boulders (boulder core more than 30cm), 005 including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chiselling tool for advancing through occasional seams of hard strata to be employed where necessary in River bed area including standing/flowing water with all necessary arrangements except making of platform under water which shall be paid under relevant item of SOR. 10m to 20m

Exploratory drilling of Boreholes down to required depth, drilling of 150mm diameter boreholes in all type of soils except hard rock and large boulders (boulder core more than 30cm), 006 including refilling, reinstating surface and disposing off surplus material including use of mechanical rigs with power operated winches as well as percussion / chiselling tool for advancing through occasional seams of hard strata to be employed where necessary in River bed area including standing/flowing water with all necessary arrangements except making of platform under water which shall be paid under relevant item of SOR. 20m to 30m

Erection of temporary working platform to drill bore hole through flowing/standing water through river bed up to water depth of 1.5m, and dismantling after completing work and removing from the site to clear the water way.

Drilling of NX size borehole (75mm dia.) in all types of hard rock and collection of rock core samples from boreholes and preserving in boxes. 0m to 10m

Drilling of NX size borehole (75mm dia.) in all types of hard rock and collection of rock core samples from boreholes and preserving in boxes. 10m to 20m

Drilling of NX size borehole (75mm dia.) in all types of hard rock and collection of rock core samples from boreholes and preserving in boxes. 20m to 30m

Conducting in-situ full size Plate Load Test (PLT) at selected location as per IS:1888 including making loading arrangements & casting of RCC/cast in-situ concrete footing as per codal provisions including excavation and refilling of trial pit. Plate size 45cm x 45cm

Conducting in situ Vane shear test for soil as per IS:4434

Conducting determination of California Bearing Ratio as per IS:2720

Taking out 100mm dia. & 450mm long undisturbed samples of soil from bore holes, 014 including provision of air tight containers for packing and, labeling incl. transporting the samples to laboratory. Piston sampler shall be used for extracting undisturbed samples where necessary. Samples shall be collected as per IS:2720.

Taking out 100mm dia. & 450mm long disturbed samples of soil from bore holes, including provision of air tight containers for packing, labeling and transporting the samples to laboratory. Samples shall be collected as per IS:2720.

Conducting standard penetration test as per IS:2131 at approximate1.5m intervals in bore holes, as directed by the Engineer in charge

Collection of water samples at required intervals

Conducting laboratory Tests on collected soil samples as per relevant IS code Moisture Content/Dry Density

Conducting laboratory Tests on collected soil samples as per relevant IS code Atterberg Limits

Conducting laboratory Tests on collected soil samples as per relevant IS code Specific Gravity

Conducting laboratory Tests on collected soil samples as per relevant IS code Grain size analysis including Hydrometer analysis

Conducting laboratory Tests on collected soil samples as per relevant IS code Direct Shear Test

Conducting laboratory Tests on collected soil samples as per relevant IS code Natural Density

Conducting laboratory Tests on collected soil samples as per relevant IS code Consolidation Test

Conducting laboratory Tests on collected soil samples as per relevant IS code Unconfined Compression Test

Conducting laboratory Tests on collected soil samples as per relevant IS code Tri- axial Test

Conducting Laboratory tests on collected ROCK SAMPLES as per relevant IS code Density Test

Conducting Laboratory tests on collected ROCK SAMPLES as per relevant IS code Water Absorption & Porosity

Conducting Laboratory tests on collected ROCK SAMPLES as per relevant IS code Hardness

Conducting Laboratory tests on collected ROCK SAMPLES as per relevant IS code Unconfined Compression Test

Conducting chemical analysis of ground water samples to determine suitability for concreting a n d aggressiveness in relation to attack on concrete / reinforcement including determination of pH value.

Conducting chemical analysis of soil samples to determine aggressiveness in relation to attack on concrete / reinforcement including determination of pH value