What is the significance of a geotechnical site investigation?

A geotechnical site investigation is crucial as it assesses subsurface conditions, which is fundamental for making informed and safe design decisions in engineering projects. By understanding the soil and rock properties, groundwater levels, and overall geological conditions at a site, engineers can determine how these factors will affect the stability, drainage, and overall behavior of structures built on or in the ground. This information is essential for designing foundations that can support the anticipated loads, selecting appropriate construction methods, and minimizing risks related to soil movement, settlement, or other geotechnical hazards.

While determining costs, providing legal permissions, and evaluating material availability may be relevant to the overall project, they do not directly relate to the primary purpose of a geotechnical investigation, which is centered on ensuring safety and suitability for construction.