PROJECTIONS ANALYSIS OF SURFACE WAVES (PASW) - DESCRIPTION OF THE METHOD AND CASE STUDIES

Abstract

This study is intended to describe the PASW method and the results of its application. This technique is based on both the analysis of the dispersion and frequency dependence of the Rayleigh wave ellipticity. Unlike for SASW / MASW (Spectral / Multichannel Analysis of Surface Waves), during carrying out the PASW method there is no need for a priori information on the pressure wave velocity (or, in other words, on the Poisson's ratio) of the underlying layers. Thus, this technology allows one to reconstruct the velocity profiles of two body waves. By analogy with the names of SASW / MASW, the method is named PASW (Projections Analysis of Surface Waves). The study will describe the features of the technology, its advantages and disadvantages. The PASW method has been successfully used to solve various model engineering problems. The accent will be made on two cases: measuring the variations in soil characteristics under controlled saturation with water, and studying the effects of liquefaction.