Carry out Geotechnical Investigation, Bathymetry survey and Topography Survey at Dighi, Dist. Raigad

Carry out Geotechnical Investigation, Bathymetry survey and Topography Survey at Dighi, Dist. Raigad

Mobilizing and demobilizing of hydraulic boring equipment, all other necessary machinery, including jack-up platform for marine holes, and personnel for boring work including all other enabling works including site establishment etc. (60% of the total amount under this item shall be released upon mobilization and balance 40% after demobilization).

Setup and transfer of hydraulic rotary drilling equipment with other accessories to different marine borehole locations with supply of all labor, materials, equipment etc. complete and positioning at the location / boreholes as per specification, contract requirement. The rate shall also include observation of ground water in all boreholes.

Boring 100/150mm diameter marine boreholes as specified through gravel, sand, silt clay, hard clay and all types of soils with SPT-N < 10% is encountered, the material will be treated as soil and this core drilling operation shall be at no extra cost to the Employer.

Drilling 63.5mm diameter size exploratory boreholes in weak to strong rock and collecting core samples in core boxes as per specifications using triple core barrel. Exploration of 10m in moderately weak rock shall also be ensured.

Conducting Standard Penetration tests (SPT) in boreholes as per specification.

Conducting Borehole Vane Shear test as per specification

Collecting undisturbed soil samples (UDS) from boreholes at specified depths including packing, sealing and labelling as specified including provision of sampling tubes, store as necessary, with all handling charges and dispatching the same to laboratory

Collect disturbed bulk bag samples

Collect small disturbed samples

Conducting Laboratory tests on soil samples collected during exploration work as per specification

Moisture content

Atterberg’s Limits (Liquid Limit., Plastic Limit, Shrinkage Limit.)

Dry Density

Specific gravity

Particle density by gas jar or pycnometer

Particle size distribution by wet sieving (Cohesionless soils)

Particle size distribution by sedimentation (pipette/hydrometer)

Unconsolidated Undrained (UU) triaxial compression test (Cohesive soils)

Consolidated Undrained (CU) triaxial compression test (Cohesive soils)

Direct shear box tests (Cohesionless soils)

Testing of ground water

One-dimensional consolidation properties test period 5 days (up to 6 loads /unload)

Unconfined Compressive Strength (UCS) test (Cohesive Soils)

Conducting laboratory test on Rock Core Samples.

Dry Density.

Specific gravity.

Water absorption.

Porosity.

Unconfined compressive strength (soaked)

Point load index

Modulus of elasticity

Factual report including AGS format

Conducting laboratory test on sub soil samples

Chemical Analysis (PH, Sulphate, Chloride, Carbonate, Gypsum, Total Dissolved solids)

For Land boreholes

Mobilizing and demobilizing of hydraulic boring equipment, all other necessary machinery, including jack-up platform for marine holes, and personnel for boring work including all other enabling works including site establishment etc. (60% of the total amount under this item shall be released upon mobilization and balance 40% after demobilization).

Setup and transfer of hydraulic rotary drilling equipment with other accessories to different marine borehole locations with supply of all labor, materials, equipment etc. complete and positioning at the location / boreholes as per specification, contract requirement. The rate shall also include observation of ground water in all boreholes.

Boring 100/150mm diameter marine boreholes as specified through gravel, sand, silt clay, hard clay and all types of soils with SPT-N < 10% is encountered, the material will be treated as soil and this core drilling operation shall be at no extra cost to the Employer.

Drilling 63.5mm diameter size exploratory boreholes in weak to strong rock and collecting core samples in core boxes as per specifications using triple core barrel. Exploration of 10m in moderately weak rock shall also be ensured.

Conducting Standard Penetration tests (SPT) in boreholes as per specification.

Conducting Borehole Vane Shear test as per specification

Collecting undisturbed soil samples (UDS) from boreholes at specified depths including packing, sealing and labelling as specified including provision of sampling tubes, store as necessary, with all handling charges and dispatching the same to laboratory

Collect disturbed bulk bag samples

Collect small disturbed samples

Conducting Laboratory tests on soil samples collected during exploration work as per specification

Moisture content

Atterberg’s Limits (Liquid Limit., Plastic Limit, Shrinkage Limit.)

Dry Density

Specific gravity

Particle density by gas jar or pycnometer

Particle size distribution by wet sieving (Cohesionless soils)

Particle size distribution by sedimentation (pipette/hydrometer)

Unconsolidated Undrained (UU) triaxial compression test (Cohesive soils)

Consolidated Undrained (CU) triaxial compression test (Cohesive soils)

Direct shear box tests (Cohesionless soils)

Testing of ground water

One-dimensional consolidation properties test period 5 days (up to 6 loads /unload)

Unconfined Compressive Strength (UCS) test (Cohesive Soils)

Conducting laboratory test on Rock Core Samples.

Dry Density.

Specific gravity.

Water absorption.

Porosity.

Unconfined compressive strength (soaked)

Point load index

Modulus of elasticity

Factual report including AGS format

Trial Pits with CBR & Plate load tests Excavate trial pits and conducting plate load test at 1.5m - 2.5m below EGL and collect samples and Conduct Plate load test & field CBR test at 1.5m & 2.5m below ground level respectively.

Conducting laboratory test on sub soil samples

Chemical Analysis (PH, Sulphate, Chloride, Carbonate, Gypsum, Total Dissolved solids)

ADCP, Met station & ATG Deployment (Current & wave observation by Mobilization of equipment (2 no of ADCP), boats and personnel, including all statutory clearances, HSE and security clearances as applicable for installation of ADCP at two location for duration of 35 days + Tidal observation at one location nearby Jetty for 30 days + Meteorological Measurements to measure Wind speed and direction, Air temperature, Relative humidity, Atmospheric pressure, Precipitation and Visibility on land near survey area for duration of 30 days)

Conducting Topographic and contour survey at the proposed development area as per specifications