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

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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.

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.13, pp.77-94, 2020-03-31

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The residential land in the Omagari area of Kitahiroshima City collapsed 28 houses along the river by the 2018 Hokkaido Iburi Eastern Earthquake. In addition, the stricken area suffered heavy rain by Typhoon 21 the day before the earthquake. The cause of the damage is thought to be an increase in groundwater level in the valley-filled embankment in addition to the earthquake. Therefore, in this paper, the cause of residential land damage was estimated by slip stability analysis, and the effect of groundwater reduction method was clarified.