Estimation for seismic wave propagation property of soil structure based on seismic interferometry

Kuroda SEIICHIRO; Susumu MASUKAWA; Hidekazu TAGASHIRA

Presentation information

Oral

Symbol S (Solid Earth Sciences) » S-SS Seismology

[S-SS27_29AM1] Seismic wave propagation: Theory and Application

Tue. Apr 29, 2014 9:00 AM - 10:45 AM 411 (4F)

Convener:*Tatsuhiko Saito(National Research Institute for Earth Science and Disaster Prevention), Hisashi Nakahara(Solid Earth Physics Laboratory, Department of Geophysics, Graduate School of Science, Tohoku University), Jun Matsushima(School of Engineering, The University of Tokyo), Kiwamu Nishida(Earthquake Research Institute, University of Tokyo), Kazuya Shiraishi(JGI, Inc.), Chair:Yohei Yukutake(Hot Springs Research Institute of Kanagawa Prefecture), Kazuya Shiraishi(JGI, Inc.)

9:30 AM - 9:45 AM

[SSS27-03] Estimation for seismic wave propagation property of soil structure based on seismic interferometry

*Kuroda SEIICHIRO¹, Susumu MASUKAWA¹, Hidekazu TAGASHIRA¹ (1.National Institute for Rural Engineering, NARO)

Keywords:Seismic interferomtetry, Soil Structure, Dam body, Dike, Shear velocity, Centrifuge test, Fill dam

Recently seismic interferometry was applied to estimation for seismic response of natural ground but also those of artificial structure like a building. We applied seismic interferometry concept for retrieval of seismic response of a model dike of soil structure like a fill dam. We employed deconvolution interferometry to estimate seismic response in time domain. From the waveforms obtained from deconvolution with the motion in the basement of a model dam, we estimate traveltimes of shear wave propagating through it and its mean velocity. Estimated velocity explain the normal mode of a model dike well. This approach can be applicable to monitor change in seismic response a dike caused by strong earthquakes or its internal water content change.