Ground Investigation

We recognise the importance of carrying out a thorough ground investigation to ensure that appropriate and cost effective advice is provided to our clients. We are also aware of the need to be cost effective and to carry out investigation works as efficiently as possible. To meet these objectives our engineers and technicians are trained to tailor investigation design to suit specific site constraints or requirements and to optimise the time spent on site.

Investigation techniques available include:

• Light cable percussion (shell and auger) boring
• Rotary core drilling
• Window sampler boring (both hand held and machine mounted)
• Continuous dynamic probing (DPH and DPSH)
• Trial pitting (by hand or mechanical excavator)

In addition to conducting the common in-situ strength and relative density determinations, our engineers and technicians are trained and equipped to undertake less frequently requested in situ testing such as:

• Plate bearing tests
• Soakage tests (borehole or trial pit)
• Gas and groundwater monitoring
• In situ density tests
• CBR tests
• Specification compliance tests

We regularly install and monitor gas and groundwater standpipes and piezometers. We also operate a range of in situ monitoring devices including intrinsically safe infra red gas analysers. In addition to the techniques available in house we can also advise on, and if necessary, arrange for static cone, pressuremeter or geophysical surveys to be carried out to enhance or assist in the design of conventional investigations.

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