Geotechnical Site Investigations

A geotechnical investigation is usually needed for commercial, non-residential, or more complex builds. The goal is to understand the ground conditions of your site. This includes looking at soil types, rock layers, groundwater, and any potential risks, so we can give clear recommendations for foundation design and construction methods.

Just like a standard site classification, the work can be done by hand or with machinery depending on what the project needs. For most geotechnical investigations, we use our specialised tight-access tracked rigs, multiple 4×4 drill rigs, and larger truck-mounted rigs.

A geotechnical report gives you a detailed picture of what’s happening below the surface. It usually includes:

• Soil Classification: A breakdown of the soil and rock types on site, including strength, density, and other key properties.
• Groundwater Information: Details about groundwater depth, seasonal changes, and how it might impact construction.

Geotechnical Recommendations: Guidance on foundation design, excavation, earthworks, and how to manage any identified risks.

Geotechnical reports are highly detailed and play a huge role in designing foundations. They help determine the right foundation type, depth, and load-bearing capacity. A thorough report helps avoid unexpected surprises during construction, improves cost planning, and reduces the chances of costly design changes later on.

These investigations are required for most commercial or complex builds, including (but not limited to):

• Factories and warehouses
• Commercial buildings and shopfronts
• Retaining walls
• Sports field infrastructure (netting, scoreboards, etc.)
• Sporting pavilions
• Lighting, telecom, and meteorological towers
• Pavement/DCP-CBR investigations
• Playgrounds, boardwalks, and shelters
• Schools, kindergartens, and childcare centres