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Abstract

Field seismic testing is an active and growing area in Civil Engineering, especially in the subdisciplines of geotechnical, transportation, and structural engineering. Traditionally, intrusive seismic methods have been used. Over the past 15 years, nonintrusive surface-wave methods have undergone significant developments. One surface-wave method, the spectral analysis of surface waves (SASW), is briefly discussed. Development of the SASW method began in the mid-1980’s out of needs in geotechnical earthquake engineering to determine shear wave velocity (Vs) profiles in hard-to-sample soils (e.g. liquefiable gravelly soils) and in pavement engineering to evaluate stiffness profiles without boreholes. Because the method is nonintrusive, applications within Civil Engineering have mushroomed. A brief background of the SASW method is presented. Case histories illustrating the range in applications and profiling depths are discussed. Some examples are: (1) detection of the onset of fatigue cracking in the asphaltic surface layer of a pavement using 2- to 20-cm long wavelengths, (2) evaluation of the improved zone in a liquefiable sand due to dynamic compaction using 0.3- to 30-m long wavelengths, and (3) determination of Vs profiles at Yucca Mountain, Nevada using 1- to 1000-m long wavelengths.

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/content/papers/10.3997/2214-4609.201404907
2009-06-08
2024-03-28
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201404907
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