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発表 A Centrifuge Model Test concerning Seismic Reinforcement of Embankments on Peaty Ground

作成年度 2010年度
論文名 A Centrifuge Model Test concerning Seismic Reinforcement of Embankments on Peaty Ground
論文名(和訳) 泥炭地盤上の盛土の耐震補強法に関する遠心力載荷模型実験
論文副題
発表会 7th International Conference on Ground Improvement Techniques(第7回地盤改良に関する国際会議)
誌名(No./号数)
発表年月日 2010/06/23 ~ 2010/06/25
所属研究室/機関名 著者名(英名)
寒地地盤チーム梶取 真一(KAJITORI Shinichi)
寒地地盤チーム西本 聡(NISHIMOTO Satoshi)
寒地地盤チーム林 宏親(HAYASHI Hirochika)
寒地地盤チーム橋本 聖(HASHIMOTO Hijiri)
抄録
Several large earthquakes in the past have caused significant deformation to road embankments and river levees constructed on highly organic and extremely weak peaty ground. Previous studies have revealed the mechanism behind this deformation as: 1) settlement of the layer into which the bottom of the embankment on peaty ground sinks; 2) dissolution of the toe of the slope into mud due to the generation of excess pore water pressure in the layer into which the embankment sinks; and 3) lateral flow of the peat layer.[*]While the use of gabion boxes to facilitate drainage is known to be effective as a measure against dissolution of the toe of the slope into mud、 techniques for seismic assessment and rational seismic strengthening have yet to be clarified. Accordingly、 a centrifugal model test was conducted concerning rational seismic strengthening of existing embankments on peaty ground. The results revealed that ground improvement at the toe of the slope using cement stabilization was effective against large deformation of embankments during earthquakes.
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