外洪含沙量对干渠泥沙淤积影响研究  

Study on Influence of Sediment Concentration of External Flood on Sediment Deposition in Main Channel

作　　者：田鹏伟 张思佳[2] 王志国[1,3] 杨会朋 陈力晖 李燊 TIAN Pengwei;ZHANG Sijia;WANG Zhiguo;YANG Huipeng;CHEN Lihui;LI Shen(College of Water Resources and Hydropower Engineering,Hebei University of Engineering,Handan 056038,China;Beijing IWHR-KHL Co.,Ltd.,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Hebei Key Laboratory of Intelligent Water Conservancy,Hebei University of Engineering,Handan 056038,China;Handan Management Office of Hebei Branch,Construction Administration Bureau of the South-to-North Water Transfer Project,Handan 056006,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038 [3]河北工程大学河北省智慧水利重点实验室,河北邯郸056038 [4]南水北调中线干线工程建设管理局河北分局邯郸管理处,河北邯郸056006

出　　处：《人民黄河》2022年第7期112-114,共3页Yellow River

基　　金：国家重点研发计划项目(2017YFC0405004)。

摘　　要：外来洪水汇入干渠产生的泥沙淤积会减弱渠道过流能力,导致水体溢顶漫堤,严重影响堤岸边坡的稳定性。通过物理模型试验研究外洪含沙量对干渠内断面流速横向分布、流速垂向分布、泥沙淤积过程及淤积形态的影响规律。结果表明:干渠中间位置受外洪和渠道边壁阻力的影响较小,其流速较大,洪口附近和渠道边壁处流速较小;在一定水深范围内流速随水深减小而增大,靠近水面时流速减小;外洪含沙量越大,泥沙淤积厚度越大,泥沙淤积起始位置和最大泥沙淤积厚度出现位置越靠近干渠上游。The sediment deposited by the external flood into the main channel will weaken the flow capacity of the channel,causing the water body to overflow the top and overflow the embankment,which will seriously affect the stability of the embankment slope.The effects of sediment concentration in external flood on the transverse and vertical distribution of flow velocity,sedimentation process and sedimentation morphology in the main channel were studied by physical model test.The results show that the middle of the main channel is less affected by the external flood and the resistance of the channel side wall,and the flow velocity is larger.On the contrary,the flow velocity near the flood mouth and the channel side wall is smaller.The flow velocity increases with the decrease of water depth in a certain depth range,and decreases when it is near the surface.With the increase of external flood sediment concentration,the sediment deposition thickness increases,and the initial position of sediment deposition and the maximum position of sediment deposition thickness are closer to the upstream of the main channel.

关 键 词：外洪 含沙量 干渠 流速 泥沙淤积 

分 类 号：TV149.2[水利工程—水力学及河流动力学] TV146