著者
橋本 隆雄 内田 秀明 宗川 清
出版者
国士舘大学理工学部
雑誌
国士舘大学理工学部紀要 = TRANSACTIONS OF THE KOKUSHIKAN UNIVERSITY SCHOOL OF SCIENCE AND ENGINEERING (ISSN:18824013)
巻号頁・発行日
vol.14, pp.87-98, 2021-03-31

In the 2018 Hokkaido Eastern Iburi Earthquake, a slope with a strength of 7 collapsed in Atsuma Town. On the other hand, in Sapporo City, where the epicenter distance exceeds 50 km, earthquakes with a seismic intensity of 5 or higher were observed. In the Omagari district of Kitahiroshima City, a seismic intensity of less than 5 was observed, and 28 residential land facing the Omagari River collapsed. In Kitahiroshima City, typhoon No. 21 caused heavy rain before the earthquake. Therefore, in this paper, we analyzed the slope of the building in the Omagari area of Kitahiroshima City and the damage to the retaining wall. As a result, it was found that the main causes of the slope of the building and the damage of the retaining wall were the rise of the groundwater level of the loose embankment of the valley in addition to the earthquake.

言及状況

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2018年9月6日に起きた北海道胆振東部地震。土砂災害が多数発生、谷沿いの盛り土地盤の被害などがありましたが、かなりの降雨があった台風が通過した翌日に、地震が発生しています。 降雨により地下水位が上昇、土砂災害に繋がった可能性が指摘されています。 例 https://t.co/6VIbzkCwPp https://t.co/zoyPsWhDZB

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