Cable Percussion Boreholes

Cable Percussion Boreholes

Cable percussion boreholes are a common method of site investigation and are also regularly referred to as “shell & auger” boreholes. Cable percussion boreholes can investigate the soil profile to much greater depths than window sample boreholes, but are limited to cohesive or granular superficial soils or weak weathered solid geological deposits. The boreholes are typically drilled in 6” diameter, but the drilling rigs also have the capability of drilling larger daimeter holes and reducing the diameter with depth to aid the drilling progress.

These boreholes are used for obtaining undisturbed cohesive soil samples, for undertaking in situ testing (SPTs) and for various permeability tests. The soil samples are logged by Nicholls Colton Group’s experienced engineers and selected soil samples tested in our *MCERTS and *UKAS accredited geotechnical and contamination testing laboratory. The boreholes can be used for the installation of a wide range of gas, groundwater and geotechnical instrumentation.