Geotechnical and Groundwater Investigations

Geotechnical investigation services are performed to obtain information on the physical properties of soil, earthworks, pavements, and foundations for proposed or existing structures. Our clients use the data obtained by our geotechnical engineers to determine foundation designs, prepare for soil improvement work, and to properly lay soil, asphalt, and concrete.

Cone Penetration Testing (CPTu)

Cone Penetration Testing (CPTu) is a soil investigation method that provides real-time measurement of soil stratigraphy, SPT, and physical parameters. Our equipment is capable of investigating depths up to 40 meters, providing fast, reliable data that is often more cost-effective than borehole drilling and laboratory testing.

We highly recommend this method as it immediately provides accurate soil data and characteristics compared to boreholes. However, CPTu cannot test in rock layers. In those cases, we deploy a drilling rig to conduct boreholes in rock.

Borehole Drilling

We deploy XY drilling rigs for Standard Penetration Testing (SPT) and the collection of disturbed and undisturbed soil samples. Specialized sampling techniques include mazier and piston samplers, alongside double-tube rock coring for high-quality core recovery.

Pavement Testing

Our teams conduct pavement testing with the following equipment:

• Plate and Dial Gauges for Plate Bearing and Deflection Testing
• Troxler (Nuclear Density Gauge)
• Sand Cone Testing
• Field Density and Macro-Texture Depth Measure Equipment
• Dynamic Cone Penetrometer (TRL and Light Model)
• Thermometers, Carpet Test Tray and Lab Weight Scales
• Pavement Coring Machines for Sample Extraction

Laboratory Testing and Standards

All of our on-site and laboratory procedures adhere to ASTM standards. We conduct regular inspections of our partner soil testing laboratories to ensure quality control and compliance standards are maintained for all of our projects.

Electrical Resistivity

We use the Geomative GD-10 resistivity system, equipped with a 60-electrode switcher for 2D and 3D imaging. Able to detect the groundwater table at depths of 300 meters using Schlumberger or Wenner configurations. Assisted by external international consultants for advanced processing and analytics.

Well Assessments

We perform well assessments (drawdown and recovery, constant-rate, step-drawdown) using submersible pumps, water level meters, and data loggers for obtaining transmissivity, storativity, and hydraulic parameters.