不同形式丁坝对泥沙扩散试验研究  

Experimental Study on Sediment Diffusion of Different Types of Spur Dikes

作　　者：陈聪聪 CHEN Congcong(Chongqing Jiaotong University,Hohai College,Chongqing 400074,China;Key Laboratory of Water Conservancy and Water Transportation Engineering of Ministry of Education, Chongqing Jiaotong University, Chongqing 400074,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆交通大学水利水运工程教育部重点实验室,重庆400074

出　　处：《广东水利水电》2021年第4期16-20,共5页Guangdong Water Resources and Hydropower

基　　金：国家重点研发计划项目(编号:2016YFC0402106)。

摘　　要：自然水体中的重金属离子多吸附在泥沙表面,所以有效截留泥沙便可以减少重金属离子在水体中的扩散。丁坝具有束水攻沙、壅高上游水位及改善航道水流条件的作用,丁坝存在细微差别就会对水体的运动状态产生巨大影响。通过物理模型实验,研究了同一流量条件下4种不同结构形式丁坝工况下泥沙的分布情况,对比分析不同流量和不同结构形式丁坝对泥沙扩散的影响规律。The heavy metal ions in natural water are mostly adsorbed on the surface of sediment,so the effective interception of sediment can reduce the diffusion of heavy metal ions in the water.The spur dam has the functions of beaming water to attack the sand,holding high upstream water level and improving the flow conditions of the channel.The slight difference of the spur dam will have a huge impact on the state of water movement.Through physical model experiments,the distribution of sediment under 4 flow rates and 7 different structural types of spur dikes was studied,and the influence of different flow rates and different structural types of spur dikes on sediment diffusion was comparatively analyzed.

关 键 词：丁坝 泥沙 扩散 重金属离子 截留 

分 类 号：TV135[水利工程—水力学及河流动力学]