著者

本間 大輔 窪内 篤 山本 泰司 畑山 朗 木村 克俊

出版者

Japan Society of Civil Engineers

雑誌

海洋開発論文集 (ISSN:09127348)

巻号頁・発行日

vol.21, pp.927-932, 2005 (Released:2011-06-27)

参考文献数

1

被引用文献数

1 1

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On September 8, 2004, Typhoon No.0418 (Typhoon Songda) moved north along the western coast of Hokkaido, bringing high winds to wide areas in the storm zone. Omori Bridge, a 429-m-long I-girder bridge on National Highway 229, suffered the collapse of a 159-m-long section. The bridge spanned a reef that is surrounded by wave-dissipating blocks on the seaward side and precipices on the landward side. On the day of the collapse, waves were extremely high and winds were strong, and abnormal tide levels were attributed to the effect of the local topography. In this research, hydraulic model tests were performed to study the damage mechanism of the bridge and the wave forces that acted on it, in order to assess the safety of the truss bridge that will be erected for temporary restoration. The splash patterns were also examined to determine the conditions under which vehicles can safely run after the restoration.

著者

越智 聖志 木村 克俊 山本 泰司 上久保 勝美 名越 隆雄

出版者

Japan Society of Civil Engineers

雑誌

土木学会論文集B2(海岸工学) (ISSN:18842399)

巻号頁・発行日

vol.71, no.2, pp.I_1003-I_1008, 2015

被引用文献数

2

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1980年1月,北海道の日本海側に位置するK海岸に大型の低気圧が来襲し,大型バスと救急車が高波による越波の影響を受け,路外へ滑動および横転する事故が発生した.本研究では,事故時の関係者および当時の新聞記事などから事故状況を分析し,縮尺1/30の2次元水理模型実験により,事故発生当時の護岸背後地における越波状況を再現した.また,波力実験を行って越波流速を指標として被災車両に作用した越波による波力の定量的評価を行うとともに,越波流速と滑動距離との関係を明らかにした.さらに,当該事故発生後に越波対策として消波ブロックが設置された断面に対して越波流量および越波流速を求め,通行車両の安全性を確認した.

著者

吉野 真史 丸山 和英 木村 克俊

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B2(海岸工学) (ISSN:18842399)

巻号頁・発行日

vol.67, no.2, pp.I_1246-I_1250, 2011

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A person in a shallow beach near shoreline at Moheji Coast in Hokkaido died due to wave that had ordinary height in November, 2008. In order to reproduce the situation of the fall accident in a shallow beach, two-dimensional hydraulic model tests and numerical calculation were carried out to examine the wave force on a human body. The fall limit ratio was newly proposed for estimating the qualitative risk of person's fall accidents, and its applicability was confirmed. Based on these results, possibilities of person's fall accidents with ordinary waves were confirmed, and the safety tide level was shown for some wave conditions. A basic idea of the safety management was also proposed for shallow beach.