Ground Investigation

There are significant risks in the ground and if you do not address them adequately there will be potential trouble ahead. Geotechnical claims usually steam from the failure to adequately characterize the subsurface stratigraphy, groundwater condition or properties of the soil.

The first step to identify these risks is doing ground investigations in association with laboratory testing ideally and then subsurface geological conditions can be interpreted. Throughout this process, no doubt, the engineer shall exert sound judgements to minimize zones of “uncertain conditions” by studying carefully discrete pieces of ground investigations.
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NZ Geotechnical Society published “Field Description of Soil and Rock (2015)” which provides a guideline for field investigations.

Cone Penetration Test (CPT)

Mechine Borehole

Piston Sampling Soft Clay

Rock Core Sampling

Standard Penetration Test

Test Pit