Geotechnical investigation of soil is a process that involves collecting and analyzing information about the subsurface conditions of a site to determine the geomaterial parameters needed for design

  Geotechnical investigation of soil is a process that involves collecting and analyzing information about the subsurface conditions of a site to determine the geomaterial parameters needed for design. It is a crucial step in the construction process, as it helps to understand the soil conditions that will affect the design and construction of a structure. 

Geotechnical investigations are necessary for any type of construction project, from a single house to a large warehouse, bridge, or infrastructure project. The information gathered from these investigations helps to determine: The type of foundation required, How the structure will be built, and The cost of the construction project. 

Geotechnical investigations typically include: 

Surface exploration

This can involve geologic mapping, photogrammetry, or simply observing the physical conditions of the site.

Subsurface exploration

This can involve soil sampling, test pits, trenching, borings, and in situ tests.

Laboratory tests

These tests are performed on the soil samples retrieved during subsurface exploration.

The information gathered from a geotechnical investigation helps design and structural engineers to recommend design criteria for the project.