地盤の動的挙動 (1)

[III-44] Experimental study in soil reliquefaction under embankment due to aftershocks

*村井 佑次¹、権代 知輝¹、ピパットポンサ ティラポン¹、北岡 貴文¹、大津 宏康¹ (1. 京都大学)

キーワード：再液状化、液状化、余震、アーチ効果

In this study, in order to research the change of strength for liquefaction inside embankment due to the history of earthquake, some centrifuge test with adding some excitation patterns was conducted. As a result, under soil arching condition, liquefaction easily occurred, and soil arching was hard to collapse. Moreover, the accumulation of earthquake seems to lead to the increase of strength for liquefaction regardless of existence of soil arching, in addition, change of density inside embankment may have the relationship with the change of strength for liquefaction.