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発表 The Mechanism of Earthquake Related Failure of Embankments on Peaty Ground

作成年度 2010年度
論文名 The Mechanism of Earthquake Related Failure of Embankments on Peaty Ground
論文名(和訳) 泥炭地盤上の盛土の地震時破壊機構
論文副題
発表会 3rd International Conference on Problematic Soils(第3回特殊土に関する国際会議)
誌名(No./号数)
発表年月日 2010/04/07 ~ 2010/04/09
所属研究室/機関名 著者名(英名)
寒地地盤チーム林 宏親(HAYASHI Hirochika)
寒地地盤チーム西本 聡(NISHIMOTO Satoshi)
抄録
Fibrous and high organic peat、 which is very soft and problematic soil、 is widely distributed in Hokkaido、 Japan. Hokkaido、 Japan、 has experienced major earthquakes such as the Kushiro-oki Earthquake and the Hokkaido Nansei-oki Earthquake of 1993、 the Hokkaido Toho-oki Earthquake of 1994、 and the Tokachi-oki Earthquake of 2003. These major earthquakes that occurred in Hokkaido were seen to cause severe damage to road embankments and river levees constructed on peaty ground. However、 the failure mechanism、 methods for the evaluation of earthquake resistance and the reasonable reinforcement of such embankments have not been clarified. [*]A dynamic centrifuge model test of an embankment on peaty ground was thus conducted to examine its earthquake resistance and failure mechanism. As a result、 an actual damage mode observed typically in embankments on peaty ground could be reproduced. It was revealed that the main causes of deformation was sludging of the embankment、 which was caused by the generation of excess pore water pressure at the bottom of the embankment sank in the peat layer.
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