Abstract
The shear wave velocity (Vs) is an important dynamic parameter in the field of geotechnical engineering. One of the surface wave methods is Spectral Analysis of Surface Wave (SASW) has received attention in obtaining the shear wave velocity (Vs) profile by analysing the dispersion curve. SASW is a non-destructive test, fast and time-effective for field survey. Thus, this paper proposed the application of SASW method to obtain the shear wave velocity (Vs) to represent the soil profile. This paper aims to determine the shear wave velocity (Vs) profile using SASW method, where the testing has been conducted at three site of residual soils located in Damansara, Kuala Lumpur and Nilai area. In this study, it shows that the soil profile obtained from shear wave velocity value is similar pattern with profile that obtained using Standard Penetration Testing (SPT), which conventional used in field. The shear wave velocity are proportionally increase with depth.
Highlights
The shear wave velocity (Vs) is one of the important parameter in the field of geotechnical engineering
Surface wave methods (e.g. spectral analysis of surface wave (SASW) and multichannel analysis of surface wave (MASW)) has become the preferred method in geotechnical community for Vs measurement because of their non-destructive and non-invasive approach to describe soil characteristics compare to other invasive seismic method which are costly and time-consuming
Surface wave method have utilised Rayleigh wave for near surface applications, where it travels along the free surface of the earth with elliptical retrograde particle motion
Summary
The shear wave velocity (Vs) is one of the important parameter in the field of geotechnical engineering. Vs can be directly measured by in-situ seismic methods or laboratory tests. Insitu seismic methods can be invasive techniques such as suspension logging and cross-hole, down-hole test and non-invasive technique like seismic refraction method, spectral analysis of surface wave (SASW) method and multichannel analysis of surface wave (MASW) method. Surface wave methods (e.g. SASW and MASW) has become the preferred method in geotechnical community for Vs measurement because of their non-destructive and non-invasive approach to describe soil characteristics compare to other invasive seismic method which are costly and time-consuming. Surface wave method have utilised Rayleigh wave for near surface applications, where it travels along the free surface of the earth with elliptical retrograde particle motion. The higher frequency will penetrate deeper the shallow layer while the low frequency will penetrate deeper into the earth [1]
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