矢板護岸と杭基礎の側方流動による破壊メカニズムに関する大型土槽実験  [in Japanese] Shaking table test of a large-size model on failure mechanism of sheet-pile quay wall and pile foundation due to lateral spreading  [in Japanese]

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Author(s)

    • 佐藤 正義 SATO Masayoshi
    • 防災科学技術研究所・防災システム研究センター Disaster Prevention System Research Center, National Research Institute for Earth Science and Disaster Prevention
    • 田端 憲太郎 TABATA Kentaro
    • 防災科学技術研究所・兵庫耐震工学研究センター Hyogo Earthquake Engineering Research Center, National Research Institute for Earth Science and Disaster Prevention

Abstract

実大三次元震動破壊実験施設を用いて,これまでにない規模の大型の矢板護岸とその背後地盤に杭基礎構造物を有する地盤模型を作製し,矢板護岸の大変位と杭基礎の破壊に関するメカニズムを解明することを目的として、液状化に伴う側方流動実験を行った。結果として,(1)液状化に伴う側方流動による矢板護岸の傾斜・水平の変形を再現でき,背後地盤の杭基礎を破壊させることができた,(2)護岸矢板の側方流動被害を軽減するためには,矢板の水側前面地盤の液状化を防止して受働抵抗力を保持することが効果的であることを実験結果は示唆している,(3)側方流動に伴う杭基礎の破壊のメカニズムとして,杭の破壊が構造物の変位となって現れるのは,矢板側と背後地盤側の両方の杭が破壊した時である,ことがわかった。

In order to investigate the phenomenon of the large deformation of sheet-pile quay wall and the failure of pile foundation due to liquefaction-induced lateral spreading in a port area, the shaking table test of a very large-scale model of liquefiable ground was performed at the three-dimensional full-scale earthquake testing facility, "E-Defense." In the test, the ground was liquefied under input motions based on the 1995 Hyogoken-Nambu earthquake to the model and, in turn, horizontal deformation and tilt of the sheet-pile quay wall were caused and the pile foundation behind the wall was collapsed. The testing result suggests that preventing liquefaction of the ground in front of the sheet pile is effective to mitigate lateral-spreading disaster to quay walls and the ground behind them. In terms of the failure mechanism of pile foundation, the test reveals that the deformation of the pile-foundation structure caused by the collapse of its piles appears when the piles both of sheet-pile and back-ground sides are collapsed.

Journal

  • Japanese Geotechnical Journal

    Japanese Geotechnical Journal 4(4), 259-271, 2009

    The Japanese Geotechnical Society

Codes

  • NII Article ID (NAID)
    130004482787
  • Text Lang
    JPN
  • Data Source
    J-STAGE 
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