土木学会論文集B1(水工学)
Online ISSN : 2185-467X
ISSN-L : 2185-467X
水工学論文集第59巻
橋梁周辺に発生する迂回流の流れと河岸浸食特性
和田 高宏竹林 洋史久加 朋子眞間 修一藤田 正治岡本 隆明戸田 圭一
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2015 年 71 巻 4 号 p. I_895-I_900

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Detour flow around a bridge causes floods and bank erosions every year all over the world. However, the flow and the bank erosion characteristics of detour flow around a bridge are not studied well, as a result, the countermeasures for the detour flow are not taken well to design levees and bridges. In this study, the flow and bank erosion characteristics of detour flow around a bridge are discussed by using plane two dimensional bed deformation analysis. The results show that the non-dimensional shear stress at the top edge of a levee in the downstream area of the bridge is large, because the detour water flow back to the main channel there. As a result, the bank erosion is initiated there. Subsequently, the road connecting to a bridge suppresses the progress of the bank erosion to the upstream of a bridge. Additionally, the bank erosion in the downstream of the bridge is also suppressed.
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© 2015 公益社団法人 土木学会
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