2011 Fiscal Year Final Research Report
Development of complex dike structure using liquefaction-induced base isolation to improve performances under earthquake and high water conditions
| Project/Area Number |
22656106
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Geotechnical engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KOSEKI Junichi 東京大学, 生産技術研究所, 教授 (30272511)
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| Co-Investigator(Kenkyū-buntansha) |
MIYASHITA Yukika 東京大学, 生産技術研究所, 技術職員 (20396914)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 地盤防災 / 河川堤防 |
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| Research Abstract |
Based on analyses of model test results, effectiveness of a complex dike structure using liquefaction-induced base isolation to improve performances under earthquake and high water conditions are verified. It employs a cutoff wall with minimum dimensions constructed in the middle part of earthen dikes that are underlain by a liquefiable sandy soil deposit. Based on site investigations conducted after the 2011 off the pacific coast of Tohoku earthquake, ductile performance of double sheet pile walls against tsunami overflow is revealed, which had been constructed as temporary structures.
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