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Seismic Liquefaction Potential Evaluation and Risk Management

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Fig.1 Shaking table test for
partially liquefiable ground

Earthquakes can cause serious damage to infrastructure related to civil engineering, including harbors, airports, roads, and bridges. One of the causes of this damage is often the ground liquefaction induced by the earthquake. Ground improved with anti-liquefaction treatments, such as cement-mixing and permeable-grouting, shows spatial variability in liquefaction strength. This variability arises from the spatial variability of the original soil before treatment, the non-uniformity of mixing and grouting, and other factors. In this research, ground liquefaction potential and risk management that consider the spatial variability of liquefaction strength are studied from both experimental and theoretical aspects.


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Fig.2 Application of new anti-liquefaction technique
at Tokyo International Airport


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a) Strength distribution  b) Liquefaction safety factor
Fig.3 Non-linear seismic analysis for anti-liquefaction surface

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a) Typical finite element mesh
and strength distribution

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b) Vectors of displacement and
zone of plastic shear distortion

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c) Deformed mesh
Fig.4 Random field numerical limit analysis


Geo-Disaster Prevention Laboratory,
Department of Civil Engineering, Faculty of Engineering, Kyushu University
Professor Guangqi Chen
Associate Professor Kiyonobu Kasama
Assistant Professor Zentaro Furukawa
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