GEOTECHNICAL INVESTIGATION

Onshore and Offshore Drilling.

Geosar specializes in geotechnical investigations using advanced drilling methods like Conventional Rotary and Cable Percussion. We utilize cutting-edge drilling rigs for both onshore and offshore projects, working in shallow and relatively deep waters with floating pontoons and jack-up pontoons.

Rotary Drilling - Core drilling is used with diesel-powered hydraulic drill rigs mounted on trucks to drill into the soil and rock for investigation purposes

Cable Percussion Drilling - This method adapts standard well boring, utilizing mobile rigs specifically designed for geotechnical investigation works.

Sampling and In-situ Testing

Whether drilling occurs onshore or offshore, it involves various types of sampling techniques, both disturbed and undisturbed.

Window Sampling & Windowless Sampling - Window sampling and windowless sampling are techniques used to bore through shallow, soft soils for investigating the substrata and gaining insight into ground conditions.

Core Sampling - Sampling of rock core sample is doing with double or triple  tube core barrels.

Standard Penetration Test (SPT) -The Standard Penetration Test (SPT) is a common in-situ test used mainly to assess the strength and deformation parameters of cohesion less soil to determine the resistance of soil.

Cone Penetration Test (CPT) - It's an advanced technique for studying the subsurface properties of soil and delineating soil stratigraphy.

Pressure Meter - A pressure meter test is an in situ stress-strain test performed on the wall of a borehole using a cylindrical probe that is expanded radially.

Packer Permeability -The packer test is carried out to measure hydraulic conductivity of a specified rock or soil unit.

Falling head Permeability - Falling Head Permeability Test mainly use to determine the permeability of the aquifer test zone from the head versus time data obtained.

Vane shear - Vane shear testing is one of the most common in-situ methods for the estimation of the undrained shear strength of the soil.

Piezometer Test - Stand pipe piezometers installed in the boreholes help to monitor the ground water table in each locations.

Soil Resistivity Test -Is the process of measuring a volume of soil to determine the conductivity of the soil.

Thermal Resistivity Test  - The measurement to be taken near surface of soils to determine the thermal conductivity and thermal resistivity of soil and rock.

Soil, rock and groundwater laboratory Tests

The collected samples are testing as per the International standards to find out the strength, classification and chemical parameters and to complement field observations, field testing and back analysis of the behavior of the existing ground.