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論文投稿 STUDY ON LIQUEFACTION CHARACTERISTICS OF VOLCANIC ASH SOIL

作成年度 2018年度
論文名 STUDY ON LIQUEFACTION CHARACTERISTICS OF VOLCANIC ASH SOIL
論文名(和訳) 火山灰質土の液状化特性に関する検討
論文副題 REPORT ON FIELD INVESTIGATIONS IN HOKKAIDO
発表会 日本地震工学会
誌名(No./号数) Journal of Japan Association for Earthquake Engineering
発表年月日 2018/06/22
所属研究室/機関名 著者名(英名)
寒地地盤チーム江川 拓也(EGAWA Takuya)
寒地地盤チーム山梨 高裕(YAMANASHI Takahiro)
寒地地盤チーム冨澤 幸一(TOMISAWA Kouichi)
抄録
In the conventional design method, there is no particular method to judge the liquefaction phenomenon of the unusual soil such as volcanic ash soil. This study, in order to clarify and evaluate the liquefaction characteristics of volcanic ash soil, field investigations and a series of soil laboratory tests of volcanic ash ground were carried out. The field investigations and sampling were conducted in the areas where ground liquefaction occurred due to the 1993 Hokkaido-nansei-oki and the 2013 Tokachi-oki earthquakes. According to the results, the liquefaction strength ratio (RL) was underestimated when using the formulation of the conventional design method. Moreover, it was found that the estimated formulation RL need to be modified for evaluating the liquefaction phenomenon in volcanic ash soil.
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