CPT provides a rapid, in situ, versatile and safe way to build up conceptual model of subsurface materials.
Used as part of an integrated site investigation, CPT provides a rapid and cost- effective means of quantifying the geotechnical and environmental properties of soils. Capabilities include Soil Type & Stratification. Use of tools such as the standard piezocone and gamma cone - often combined with laboratory testing of samples using the Mostap sampler - enable the identification of soil types. This approach is widely used to estimate soil type and map variability with depth across a site. Dynamic geotechnical properties Use of tools such as the cone pressure meter (CPM), in situ vane and seismic cone enables a range of ground engineering properties to be measured or derived including:
Undrained shear strength
Soil shear modulus
Effective horizontal stress
Effective overburden pressure
In situ horizontal stress
Friction angle (sand)
Soil bearing capacity
Clients choose to use CPT for a wide range of land and marine applications including:
Providing information on subsurface strata and engineering properties to designers planning foundations for new buildings, structures, high rise buildings and highways.
Geo environmental investigations to facilitate the remediation of Brownfield sites, where CPT can:
Determine depth of foundations.
Geohazard studies, for example the investigation of natural cavities and solution features and man-made features such as shafts and mine workings.
Quality control checking of earthworks, e.g. compaction testing of road or rail embankments, levees or earth dams
Cone penetration testing can provide a wide range of information in suitable soils, delivering large volumes of data to internationally recognized formats at lower cost and with less impact than alternative methods. CPTs have the following features and benefits:
Low impact – CPT provides a continuous subsurface picture with less ground disturbance than drilling.
Highly mobile – CPT can be used in most situations where ground investigation is required. On land, it can be deployed from trucks, tracked vehicles and bespoke vehicles, such as rail wagons. Over water, CPTs can be conducted from vessels, barges and jack-up platforms.
In situ measurement – therefore less affected by sample disturbance or stress relief than laboratory-based methods.
Versatility – we offer modular systems with many types of sensor available, to yield a range of information from a single mobilization
Big data delivered quickly – with rapid acquisition ( > 100 m per day), CPT yields thousands of data points to enable reliable site characterization, and provides digital output that can be transferred in real time