Location
St. Louis, Missouri
Presentation Date
14 Mar 1991, 2:00 pm - 3:30 pm
Abstract
Methods for in-situ surface measurement and spectral analysis of Rayleigh waves for subsurface soil investigation have been tried by several researchers in recent years. The two most common methods, steady-state Rayleigh-wave and spectral-analysis-of-surface-waves (SASW) have certain disadvantages and are not used for routine soil investigation. The paper presents a system which uses a controlled vibration source with amplitude modulation and variable frequency capabilities. The electromagnetic vibrator may be varied in size and weight according to the depth of the soil strata investigated. The Rayleigh wave phase velocity dispersion curves are used to compute apparent velocity distribution in depth. An approximate conversion method is then used to estimate Rayleigh wave velocity profiles of the layered soil from the apparent velocities distributions. Shear wave velocities, computed by using established theoretical relationship, may then be used to obtain design parameters for the soil strata. The system has been used routinely in Japan and South East Asia for several years now and results show good correlations with SPT and shear wave velocity measurements conducted as verification tests in a variety of sites.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1991 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Satoh, T.; Yamagata, K.; Poran, C. J.; and Rodriguez, J. A., "Soil Profiling by Spectral Analysis of Surface Waves" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 8.
https://scholarsmine.mst.edu/icrageesd/02icrageesd/session10/8
Included in
Soil Profiling by Spectral Analysis of Surface Waves
St. Louis, Missouri
Methods for in-situ surface measurement and spectral analysis of Rayleigh waves for subsurface soil investigation have been tried by several researchers in recent years. The two most common methods, steady-state Rayleigh-wave and spectral-analysis-of-surface-waves (SASW) have certain disadvantages and are not used for routine soil investigation. The paper presents a system which uses a controlled vibration source with amplitude modulation and variable frequency capabilities. The electromagnetic vibrator may be varied in size and weight according to the depth of the soil strata investigated. The Rayleigh wave phase velocity dispersion curves are used to compute apparent velocity distribution in depth. An approximate conversion method is then used to estimate Rayleigh wave velocity profiles of the layered soil from the apparent velocities distributions. Shear wave velocities, computed by using established theoretical relationship, may then be used to obtain design parameters for the soil strata. The system has been used routinely in Japan and South East Asia for several years now and results show good correlations with SPT and shear wave velocity measurements conducted as verification tests in a variety of sites.
