We have been interested in using seismic surveys since 2002 when we realised its potential for near surface geotechnical applications, such as assessment of deep fill with large particle sizes that prevent the use of intrusive testing (CPT).
We considered the use of refraction surveys (P-Wave method) but decided to pursue the use of surface wave methods, as these had the potential to detect velocity inversions (soft layers below hard layers).
We initially started using the Continuous Surface Wave System (CSWS), which provided good data with the application of post processing software (WinSASW) but it had limitations, only providing useful data over the top 5 m and taking a hour to conduct each test.
We experimented with Surface Wave Spectral Analysis of Surface Waves (SASW), which provided better data over a greater depth but it was very time consuming.
After meeting Koya Suto in 2005 by chance in the street in the Gold Coast while he was conducting a seismic survey, we were introduced to the Multi-Channel Analysis of Surface Waves (MASW) method. Since that day we have worked together with Koya improving field data acquisition techniques and applying the latest post processing techniques to a wide range of near surface geotechnical applications.
We are currently in a research and development phase, looking at the benefits of measuring Love Waves together with Rayleigh Waves.