地盤の挙動／地盤の動的挙動 (4)

[III-194] Shaking table test about fluidzation of embankment at Satozuka, Kiyota ,Sapporo City caused by The 2018 Hokkaido Eastern Iburi Earthquake

*小林 凌¹、上田 恭平²、渦岡 良介² (1. 京都大学　、2. 京都大学　防災研究所)

Keywords:embankment, sandy soil including volcanic ash, shaking table

Liquefaction and fluidization of the embankment occurred in the residential area at Satozuka,Kiyota,Sapporo caused by the 2018 Hokkaido eastern Iburie Earthquake. This residential area was filled by sandy soil including volcanic ash along the valley around 1980. After the earthquake, a ground settlement zone was formed along the valley line in the upperstream part, and a large amount of sediment was ejected in the downstream part. In this study, we reproduce the mechanism of the fluidization in the downstream part of the embankment by the shaking table in 1G field. The purpose of this study is to examine the factors that cause fluidization by comparing the cases with different model conditions.