首页|Collapse of concrete-covered levee under composite effect of overflow and seepage

Collapse of concrete-covered levee under composite effect of overflow and seepage

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原文链接
  • NETL
  • NSTL
  • Japanese Geotechnical Soc
During the Great East Japan Earthquake and Tsunami of 2011, enormous coastal levees collapsed as a result of tsunami overflows. Concrete-covered levees, where concrete blocks are used to protect levees made of soil, showed a specific failure mode in which back slope blocks and internal soils were dislodged. Although several hydraulic experiments have been conducted in an attempt to understand the failure mechanism, the complexity of the failure requires that both hydro-dynamical and geotechnical points of view be taken into account for a deeper understanding. This study uses a centrifuge to identify the failure behavior of levees from those points of view. The centrifuge can reproduce the stress, water pressure, and overflow velocity of the prototype-scale ground. Overflowing at sufficient time periods was produced in the centrifuge by generating differences in water height for seaside and landside areas. The test results showed that the levees collapsed due to a combination of the effect of water flow on the back slope and seepage inside the levees. In addition, the effectiveness of several proposed countermeasures for preventing collapse was confirmed. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.

LeveeTsunamiOverflowSeepageFailureCentrifugeCountermeasure

Takahashi, Hidenori、Morikawa, Yoshiyuki、Mori, Nobuhito、Yasuda, Tomohiro

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Port & Airport Res Inst, Geotech Engn Dept, MPAT, Soil Stabilizat Grp, Yokosuka, Kanagawa, Japan

Port & Airport Res Inst, Geotech Engn Dept, MPAT, Yokosuka, Kanagawa, Japan

Kyoto Univ, Disaster Prevent Res Inst, Coastal Disaster Res Sect, Kyoto, Japan

Kansai Univ, Fac Environm & Urban Engn, Dept Civil Environm & Appl Syst Engn, Suita, Osaka, Japan

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2019

10.1016/j.sandf.2019.08.008

Soils and foundations

Soils and foundations

EISCI
ISSN：0038-0806
年,卷(期)：2019.59(6)
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