Subsurface Investigation
Test Borings
Test Borings for Deep Soil Profiles
We perform test borings using truck- or track-mounted drilling rigs in areas accessible by vehicles and small sized portable drilling equipment such as ConCore in areas not accessible by vehicles.
Test Pits
We excavate test pits normally to a maximum depth between 5 and 15 feet below existing ground using excavators or backhoes. Not very often, we use hand tools such as heavy duty electric demolition jack hammer and spades for shallow test pits .
Hand Auger Borings
Hand Auger Borings for Shallow Soils
We use hand auger and Dynamic Cone Penetration (DCP) Test to perform the boring to a maximum depth of 10 feet below the existing ground surface for areas that are not accessible by vehicles and the anticipated subsurface soils are soft clays, silts, or sands without gravels and bigger particles.
The DCP test is a method of geotechnical investigation that gives a measure of the in-situ resistance of soil to penetration. This method can help determine the strength of in-situ soil and depth and thickness of sub-surface soil layers. The test is simple, cost-effective, and easy to transport.
