STP1213: Automation of Spectral Analysis of Surface Waves Method

    Nazarian, S
    Assoc. Prof., Center for Geotechnical and Highway Materials Research, The University of Texas at El Paso, El Paso, TX

    Yuan, D
    Research Engineer, Center for Geotechnical and Highway Materials Research, The University of Texas at El Paso, El Paso, TX

    Baker, MR
    Research Faculty, Center for Geotechnical and Highway Materials Research, The University of Texas at El Paso, El Paso, TX

    Pages: 13    Published: Jan 1994


    Abstract

    With minimal simplifying assumptions and approximations, an automated version of the spectral analysis of surface waves (SASW) method has been developed to determine in situ shear wave velocity profiles of soil deposits. Testing time for each site, including collection of data, construction and inversion of dispersion curve, should not be more than thirty minutes. To accelerate field testing, a multi-sensor geophone array and a PC-based data-acquisition, signal-analysis package have been developed. The two greatest challenges have been the development of a fully-automated procedure to construct the dispersion curve from field data and a fast yet, theoretically-sound, inversion process to determine the shear wave velocity profile from a given dispersion curve. In this paper, the major theoretical and practical aspects of these two steps are described and discussed with examples.

    Keywords:

    in situ testing, surface wave, dispersion curve, spectral analysis, shear wave velocity, inversion, automation


    Paper ID: STP13208S

    Committee/Subcommittee: D18.09

    DOI: 10.1520/STP13208S


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