Using a Seismic Electronic Cone Penetrometer (SCPT), it is possible to measure down-hole shear wave propagation speed during cone soundings.
A Seismic test is performed at given depths of probing, testing from either the left or right side of the Seismic cone, using the AutoSeis Hammer box. Performing this measurement during CPT probing is much quicker and less expensive that standard cross-hole tests or down-hole tests.
The Seismic graphs show the Seismic Shear Wave Test results (Left or Right) and the Seismic Delay and Velocity (Left or Right). Click here to see Seismic graph examples.
Based on previous testing experience, we prefer to use geophones in our SCPT cones (instead of accelerometers) as we found this produced a better seismic signal. Some people may argue that accelerometers provide better definition, as they do in fact sense a wide spectrum and record high frequencies, however this has nothing to do with shear wave and in fact only causes complex post-processing of the data.
Probedrill can also offer a dual-geophone SCPT cone.