摘要
运用物理模型试验方法,阐明了在相同的龙口底宽情况下,分流流量、龙口流量与截流戗堤顶宽关系;指出了龙口水流流速随截流戗堤顶宽增加的变化规律以及龙口水深的沿程变化规律;分析了戗堤龙口段的水流流态及宽度效应,提出了合理的戗堤顶宽及进占方法,可以给导截流设计施工提供设计依据。
River closure is a key project in hydraulic construction. An undistorted physical model whose model scale is eighty is built in this study. Model of closure composed of open diversion channels and longitudinal cofferdams can be similar in rectangle river beds with flat bottom. During the experiment, advancing symmetrically by end-dumping method from either bank is carried out. The variation regularity of the discharge in open diversion channels , and the flow velocity at the bottom of closure gap is discovered in this paper, and the width effect of closure dykes in end-dumping closure with single embankments is studied. Based on the test results, reasonable range of width embankment is pointed out.
出处
《中国农村水利水电》
北大核心
2009年第7期86-88,共3页
China Rural Water and Hydropower
基金
湖北省水电工程与管理重点实验室(三峡大学)开放资金资助项目(HEF200402)
关键词
截流
宽戗
宽度效应
end dumping closure
broad closure dyke
width effect
