What Does Suspension Logging Mean?
Suspension logging is a method of measuring seismic wave velocity profiles. It can determine shear and compression wave velocity profiles in both soil and rock formations. The measurements are made in single, uncased boreholes that are filled with fluid and can also be used in cased boreholes.
This method is preferred over methods such as crosshole and downhole to measure in-situ shear wave velocities.
Trenchlesspedia Explains Suspension Logging
Suspension logging provides both shear and compression wave velocity measurements in a single hole at depths greater than 200 feet. It offers high resolution as less as 20 cm for resolving thin layers, that can effect surface response. It is not affected by path effects near a soil rock interface or in steeply dipping beds, and is optimized for soil and soft rock, providing better penetration and accurate results.
It provides two independent measurements of shear wave velocity to provide an internal crosscheck.