Seismic CPT

Seismic Cone Penetration Testing (SCPT) from Geoprobe^® provides a rapid and cost effective method for directly measuring the shear wave velocity of soil.

SCPT shear wave velocity measurements are used to evaluate the:

• Liquefaction risk
• Earthquake generated ground-surface movements
• Foundations for vibrating equipment
• Behavior of offshore structures due to wave loading

CPT coupled with Seismic CPT gives details on soil types, engineering parameters, and shear wave velocity in the same test hole. The seismic CPT module is an add-on to our traditional CPT system so the seismic and CPT data is generated on the same push.

The Geoprobe^® SCPT module offers several benefits for companies and field crews. It is easy to use and cost effective as it can be added on to either the Astra or NOVA CPT systems.

Geoprobe^® True Interval Seismic Section

Shear wave velocity is calculated by recording the shear wave travel time between two depths. Typically, the probe would be pushed to two different depths and the data from the hammer strikes would be calculated in a separate reporting program after the log is complete. Meaning two hammer strikes, two depths, and more room for error. The Geoprobe^® True Interval Seismic Section has two sensors placed exactly 0.5 meters apart in the same probe which allows for a single hammer strike to be recorded at both depths, minimizing variability and improving data consistency. The Geoprobe^® DI CPT Suite logging software can calculate the velocity in real time because the geophones are a known distance apart. Operators no longer have to wait until they are back in the office to view velocity. They can have greater confidence in their shear wave velocity calculations, test faster, and save time in the field.