Liquefaction-fluidization induced land subsidence: impact of the 2011 Tohoku earthquake on reclaimed land around Tokyo bay area, Japan

Proceedings of the International Association of Hydrological Sciences. 2015;372:217-220 DOI 10.5194/piahs-372-217-2015

 

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Journal Title: Proceedings of the International Association of Hydrological Sciences

ISSN: 2199-8981 (Print); 2199-899X (Online)

Publisher: Copernicus Publications

Society/Institution: International Association of Hydrological Sciences

LCC Subject Category: Geography. Anthropology. Recreation: Environmental sciences | Science: Geology

Country of publisher: Germany

Language of fulltext: English

Full-text formats available: PDF, XML

 

AUTHORS

A. Kagawa (Research Institute of Environmental Geology, Chiba (RIEGC), 3-5-1 Inagekaigan, Mihama, Chiba city, Japan)
K. Furuno (Research Institute of Environmental Geology, Chiba (RIEGC), 3-5-1 Inagekaigan, Mihama, Chiba city, Japan)
T. Kusuda (Research Institute of Environmental Geology, Chiba (RIEGC), 3-5-1 Inagekaigan, Mihama, Chiba city, Japan)
Y. Sakai (Research Institute of Environmental Geology, Chiba (RIEGC), 3-5-1 Inagekaigan, Mihama, Chiba city, Japan)
T. Yoshida (Research Institute of Environmental Geology, Chiba (RIEGC), 3-5-1 Inagekaigan, Mihama, Chiba city, Japan)
O. Kazaoka (Research Institute of Environmental Geology, Chiba (RIEGC), 3-5-1 Inagekaigan, Mihama, Chiba city, Japan)

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Time From Submission to Publication: 12 weeks

 

Abstract | Full Text

The 2011 Tohoku earthquake caused major liquefaction-induced, ground deformation of the reclaimed land surrounding Tokyo Bay. In this area, liquefaction was visibly manifest by sand boils, ejection of sandy water, land subsidence and floating underground tanks. The level measurements show a correspondence between the degree of liquefaction-fluidization and the amount of subsidence. The strata most susceptible to liquefaction are hydraulically emplaced dredged fill and artificial strata on thick uncompacted Holocene deposits. On the other hand, the phenomena of seismic isolation coursed by liquefaction had saved the single-family houses from collapse.