The ability of the spectral analysis of surface waves (SASW) test to detect underground obstacles has been investigated. The SASW test is simulated by the finite-element method. The fluctuations in the dispersion curve, due to Rayleigh waves reflected from an obstacle, are used to detect the obstacle. Both rigid obstacles and cavities with a variety of shapes and embedment depths are considered. Obstacles in a homogeneous half-space, a layered half-space, and a pavement profile are detected. Finite-element results are compared to the available experimental results and verified by a simple mathematical model. The results indicate that the SASW test can detect an underground obstacle effectively, provided that the obstacle is relatively close to the surface. A scheme to use the surface waves for obstacle detection (SWOD) has been proposed.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of Geotechnical Engineering|
|State||Published - Mar 1997|
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology
- Environmental Science(all)