护岸式铅丝笼丁坝挑角的选择  

Oriented Angle Selection of Gabion Groin for Bank Revetment

作　　者：王燕燕[1] 刘焕芳[1] 王振[1] 

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003

出　　处：《人民黄河》2013年第7期9-11,14,共4页Yellow River

基　　金：石河子大学高层次人才启动资金资助项目(RCZX200937)

摘　　要：通过室内模型试验,研究了不同挑角时丁坝附近的水流结构、坝后回流区及自由水面的变化情况,以及不同挑角丁坝附近局部冲淤变化的规律。结果表明:随着丁坝挑角的增大,坝上游流速减小区范围扩大,坝头流速变幅增大,坝后回流区长度和宽度均有所增大,坝头水面比降也增大;结合实际工程经验,建议护岸式铅丝笼丁坝的挑角宜设计为下挑45°。This paper researched the situation changes of flow structure,backflow zone in the back of a groin and free water surface,and the law of local scouring and depositing variation in different oriented angles near the gabion groin by indoor model test.The results show that： with the increase of oriented angle,the zone of velocity decreasing in the upstream groin is expanded and the velocity variation amplitude of the groin head increases,the recirculation zone behind the groin increases in both length and width,the surface slope of the groin head also increases.Combined with the practical engineering experience,it is suggest that the suitable oriented angle of revetment gabion groin should be 45°.

关 键 词：水流结构 冲淤规律 挑角 铅丝石笼丁坝 

分 类 号：TV863[水利工程—水利水电工程]