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New findings in high-frequency surface wave method

Xia, Jiang-Hai; Gao, Ling-Li; Pan, Yu-Di; Shen, Chao; Yin, Xiaofei

Abstract:
Multi channel Analysis of Surface Waves (MASW) analyzes high-frequency Rayleigh waves to determine near-surface shear (S)-wave velocities. This method is getting increasingly attention in the near-surface geophysics and geotechnique community in the past 20 years because of its non-invasive, non-destructive, efficient, and low-cost advantages. They are viewed by near-surface geophysics community as one of most promise techniques in the future. We introduce some research results about propagation and applications of high-frequency surface waves proposed by near-surface geophysical research group at China University of Geosciences (Wuhan) in recent years. Non-geometric wave exists uniquely in near-surface materials, especially in unconsolidated sediments. It is valuable for a quick and accurate estimation of S-wave velocity of the surface layer. Our study shows that non-geometric waves are leaky waves and they are dispersive. Leaky surface wave could cause misidentification when treating the leaky-wave energy as fundamental or higher modes Rayleigh wave. Such misidentification will result in wrong inversion results. By obtaining Rayleigh-wave Green's function after separating fundamental- and higher-mode Rayleigh waves, we verify the feasibility of virtual source method in Rayleigh-wave survey, which could tremendously decreases the cost of field works. ... mehr



Originalveröffentlichung
DOI: 10.6038/cjg20150801
Scopus
Zitationen: 13
Web of Science
Zitationen: 8
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 0001-5733
KITopen-ID: 1000059097
Erschienen in Diqiu-wuli-xuebao
Band 58
Heft 8
Seiten 2591-2605
Nachgewiesen in Scopus
Web of Science
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