高含沙河流坝前冲刷漏斗物理模型试验研究  

Physical Model Experimental Study on Scour Funnel in front of Dam in Sediment-laden River

作　　者：段淇元 胡海华[2] DUAN Qi-yuan;HU Hai-hua(College of Water Resources and Hydropower,Hebei University of Engineering,Handan 056038,China;China Institute of Water Resources and Hydropower Research,Beijing 100048,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,北京100048

出　　处：《水电能源科学》2020年第12期118-121,共4页Water Resources and Power

基　　金：国家重点研发计划(2018YFC0407404,2017YFC0405201);中国水利水电科学研究院成果转化项目(SE10003A012017)。

摘　　要：高含沙河流水库在淤积基本平衡后,主要依靠一定的坝前冲刷漏斗维持水库的长期安全运行。通过某水库坝前冲刷漏斗物理模型试验研究了冲刷漏斗形态,分析了不同出库流量、排沙水位、排沙孔开启位置及进口高程下漏斗纵横向坡度变化的规律。试验结果表明,随着出库流量增加,冲刷漏斗纵向坡度变缓;开启靠近主流的排沙孔形成的冲刷漏斗坡度较缓;同流量下低水位运行时形成的冲刷漏斗坡度较缓;排沙孔进口高程愈低,冲刷漏斗范围愈大,坡度较缓。研究结果为水库排沙减淤提供了参考依据。After the siltation of the high-sandy river reservoir is basically balanced,the long-term safe operation of the reservoir is mainly dependent on a certain scouring funnel in front of the dam.In this paper,aphysical model test of the scouring funnel in front of a reservoir dam was conducted to study the scouring funnel morphology,and the change rules of the vertical and horizontal slopes of the funnel at different discharge flows,sediment drainage levels,opening positions of drainage holes,and inlet elevation were summarized.The test results show that as the outflow flow increases,the longitudinal slope of the scouring funnel becomes slower;The slope of the scouring funnel formed by opening the sand discharge hole close to the mainstream is slower;The slope of the scouring funnel formed when running at low water level at the same flow rate is slower;The lower the elevation of the inlet is,the larger the range of the scouring funnel and the slower the slope are.The research results provide a reference for the sediment removal and sediment reduction of reservoir.

关 键 词：高含沙 水库 冲刷漏斗 模型试验 

分 类 号：TV673.3[水利工程—水利水电工程]