Geotechnical Engineers
Geotechnical engineers support building projects by investigating soil and rock on development sites and advising on foundations.Can't find it? Describe what you need and matching suppliers will come to you.
Geotechnical Engineers
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Geotechnical engineers assess the potential for ground movement as soil moisture changes beneath a house on reactive clay. Residential footing reports in Australia commonly refer to AS 2870 site classifications, which inform slab and footing design. Seasonal drying and prolonged rain can affect moisture-sensitive ground, so drainage assumptions in the report need to carry through to the building plans.
Geotechnical Engineers
A residential geotechnical engineer investigating a block with a proposed basement needs a brief that identifies excavation depths and neighbouring structures. Deeper excavation can require advice on retaining the ground and managing groundwater beyond a standard residential footing investigation. Access for drilling equipment also affects where testing can take place; restricted access should be discussed before the investigation is agreed.
Can an existing soil report be used for an extension?
Check with the engineer that it covers the extension footprint and proposed loads. An older report may need supplementary testing if its investigation locations miss the new work or site conditions have changed.
What if groundwater is found during the investigation?
Ask how the observed water level affects excavation and below-ground construction, and whether further monitoring is needed. Temporary dewatering may require separate advice, particularly where lowering groundwater could affect neighbouring structures.
How should a geotechnical report be handed over to the design team?
Provide the complete report, including borehole logs and its stated limitations, to the structural engineer. Confirm that the final building footprint and excavation levels match the works assessed in the report.