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Title: Rayleigh-wave dispersion technique for rapid subsurface exploration
Authors: Chang, Frank K.
Ballard, Robert F.
Keywords: Rayleigh waves
Seismic refraction method
Subsurface investigations
Wave dispersion
Geophysical surveys
Publisher: Soils and Pavements Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Miscellaneous Paper
Abstract: This paper reports an investigation of improved or new techniques to extend the depth and/or resolution capability of rapid shallow-depth (less than 500 ft) explorations that would quickly and economically provide an engineer with accurate information on substrate conditions. Current geophysical techniques for rapidly exploring construction sites and investigating foundations, i.e., electrical resistivity, seismic refraction, and vibratory techniques, were reviewed for relative merits and shortcomings. By combining various attributes of the refraction, seismic and vibratory techniques, it was considered feasible that a study of surface-wave phenomena could measurably extend the depth limits of current investigation techniques. As a result, the so-called "Rayleigh-wave dispersion technique" was envisioned as a potentially promising, in situ test method. A test program was formulated to adapt conventional refraction seismic equipment and field procedures to acquire Rayleigh-wave data. Theoretical considerations, test procedures, interpretation of data, and comparisons with data obtained by standard methods are presented. Various advantages and limitations of the Rayleigh-wave dispersion technique are discussed.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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