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Journal: Earth and Planetary Science Letters  2013 No.29  Share to Sinaweibo  Share to QQweibo  Share to Facebook  Share to Twitter    clicks:625   
Title:
Liquefaction at Strong Motion Stations and in Urayasu City during the 2011 Tohoku-Oki Earthquake
Author: Brady R. Cox , M.EERI, Ross W. Boulanger , M.EERI, Kohji Tokimatsu , M.EERI, Clinton M. Wood , Akio Abe , Scott Ashford , Jennifer Donahue , Kenji Ishihara , Robert Kayen , Kota Katsumata,etc
Adress: University of Texas, Department of Civil, Architectural and Environmental Engineering
Abstract:

The 2011 MW = 9.0 Tohoku-oki earthquake generated a large number of unique soil liquefaction case histories, including cases with strong ground motion recordings on liquefiable or potentially liquefiable soils. We have compiled a list of 22 strong motion stations (SMS) where surface evidence of liquefaction was observed and 16 SMS underlain by geologically recent sediments or fills where surface evidence of liquefaction was not observed. Pre-earthquake standard penetration test data and borehole shear wave velocity (Vs) profiles are available for some stations, but critical information, such as grain size distribution and fines plasticity, are often lacking. In the heavily damaged city of Urayasu, we performed post-earthquake cone penetration testing at seven SMS and Vs profiles, using surface wave methods at 28 additional locations to supplement existing geotechnical data. We describe the liquefaction effects in Urayasu, the available site characterization data, and our initial data interpretations.


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