Cone Penetration Test

Site Strength and Resilience Determination

We use the most reliable, worldwide test, the Cone Penetration Test (CPT). The CPT is an in-situ testing method used to determine the geotechnical engineering properties and delineate the lithology of your soil.

The test method consists of pushing an instrumented cone, with the tip facing down, into the ground at a controlled rate (controlled between 1.5 -2.5 cm/s accepted). The resolution of the CPT in delineating stratigraphic layers is related to the size of the cone tip, with typical cone tips having a cross-sectional area of either 10 or 15 cm², corresponding to diameters of 3.6 and 4.4 cm.

The Cone Penetration Test (CPT) and its enhanced versions such as the piezocone (CPTu) and seismic (SCPT), have extensive applications in a wide range of soils. Although the CPT is limited primarily to softer soils, with modern large pushing equipment and more robust cones, the CPT can be performed in stiff to very stiff soils, and in some cases soft rock.

Advantages of Cone Penetration Test (CPT):

• Fast and continuous profiling
• Repeatable and reliable data (not operator-dependent)
• Economical and productive
• Strong theoretical basis for interpretation

For every investigation we provide a comprehensive report, clearly illustrating the measurements and calculated parameters in tables and graphs. We provide you with a description and interpretation of the test locations, stratigraphy and groundwater findings. You will receive a clear site plan with advice on adapting your foundations where necessary for maximum support strength.