水科学进展2016，Vol.27Issue(4)：579-585,7.DOI:10.14042/j.cnki.32.1309.2016.04.012
护底条件下淹没丁坝坝头局部冲刷试验
Experimental study on local scouring of submerged spur dike head under bottom protection condition
摘要
Abstract
Submerged spur dike is a kind of typical navigation project regulating structure. During the project imple⁃mentation, the protection of local scouring near the head is especially important. In order to study the characteristics of local scouring of submerged spur dike head under bottom protection condition, this study adopted undistorted model experiment method and focused on studying the variation response rules of the form of the local scour pit of submerged spur dike head under bottom protection condition, its depth and the bottom protection width. The result indicates that the local scour pit of the head under bottom protection condition is near the bottom protection edge. When bottom pro⁃tection edge is less than 20 m, the variation of the maximum scour depth is relatively small, but the scout pit′s posi⁃tion is away from the dam body. The variation rule of the maximum scour depth with the bottom protection width can be expressed with exponential relation. Based on principle of dimension analysis, this study established a formula to calculate the maximum local scour depth of submerged spur dike under bottom protection condition on riverbed made of sand.关键词
淹没丁坝/护底条件/最大冲刷深度Key words
submerged spur dike/bottom protection/maximum local scour depth分类
建筑与水利引用本文复制引用
佘俊华,夏云峰,徐华,杜德军,郝思禹..护底条件下淹没丁坝坝头局部冲刷试验[J].水科学进展,2016,27(4):579-585,7.基金项目
交通运输部重大科技专项（201132874660）；国家自然科学基金资助项目（51309158） The study is financially supported by the National Natural Science Foundation of China （ No．51309158）． （）
