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The importance of surface waves in vibration study and the use of Rayleigh waves for estimating the dynamic characteristics of soils

✍ Scribed by D. Jongmans; D. Demanet

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
532 KB
Volume
34
Category
Article
ISSN
0013-7952

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✦ Synopsis

Vibrations generated during civil engineering work are often dominated by prominent surface waves, the propagation of which is strongly influenced by site conditions. The effects of soil properties on the shape, amplitude and duration of Rayleigh waves are shown from synthetic seismograms.

Surface waves are dispersive and may be processed to retrieve the shear characteristics (shear wave velocity Vs and shear quality factor Qs) of soil layers. A seismic survey was conducted on a site (Limelette, Belgium) to determine the dynamic characteristics of the ground layers from different seismic methods. Various refraction profiles and one cross-hole test were performed to obtain shear wave velocity profiles. The comparison of surface wave inversion method with other techniques shows that the former leads to slightly underestimated Vs values.

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