The Steps of a Geotechnical Evaluation

Geotechnical drilling

A geotechnical evaluation is an engineering site assessment that determines what the foundation conditions are and recommends options for foundation design.  It is performed by a geotechnical engineer, and is required for most engineered structures including buildings, bridges, roads, and towers. The four main components of a geotechnical evaluation are: Planning Field Work Laboratory Analysis […]

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How to Determine USCS Soil Classification

The Unified Soil Classification System is a method of categorizing soils for use in engineering and geological applications. Soils are classified in USCS groups that are designated by a group symbol and a corresponding group name. The governing standard is ASTM D2487. Classification Groups The following are the soil classifications: Symbol Description GW Well graded, […]