大古水电站坝前排沙运行方式和排沙漏斗形态.PDFVIP

第39卷第2期 水 利 水 电科 技 进 展 2019年3月 Vol.39 No.2 Advances in Science and Technology of Water Resources Mar. 2019 DOI:10.3880/ j.issn.1006 7647.2019.02.010 大古水电站坝前排沙运行方式与排沙漏斗形态 1,2 1 1 1 王芳芳 ,吴时强 ,高摇 昂 ,薛万云 (1.南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏 南京摇 210029; 2. 河海大学水利水电学院,江苏 南京摇 210098) 摘要:为给实际工程排沙设施的设计和布置提供依据,基于1 颐 60 整体模型,根据淤积泥沙扬动流 速相似原理,试验研究大古水电站2条排沙廊道和1个底孔在不同运行方式下坝前库区的排沙效 果和排沙漏斗形态。 结果表明:排沙洞开启顺序对最终排沙效果影响不大;深水条件下,坝前排沙 漏斗形态主要受泥沙特性决定,非黏性沙的排沙漏斗坡度接近于淤积泥沙水下休止角;大古水电站 排沙设施的设计方案具备保证电站进水口“门前清冶的条件。 关键词:扬动流速;排沙廊道;底孔;排沙漏斗;水下休止角;大古水电站 + 中图分类号:TV673 .3摇 摇 摇 文献标志码:A摇 摇 摇 文章编号:1006 7647(2019)02 0051 05 Desilting operation modes and sand funnel patterns in front of Dagu Hydropower Station Dam/ / WANG 1,2 1 1 1 Fangfang ,WU Shiqiang , GAO Ang , XUE Wanyun (1. State Key Laboratory of Hydrology鄄Water Resources and Hydraulic Engineering,NanjingHydraulicResearchInstitute,Nanjing210029,China;2.Collegeof Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China) Abstract:Based on the similarity criteria of incipient velocity,an experimental study is performed on a 1 颐 60 overall physical model to study the sediment flushing effects and sand funnel patterns of two desilting galleries and one bottom tunnel under designed operating conditions to provide a basis for the design and arrangement of the desilting facilities in front of the Dagu Hydropower Station Dam. The results show that the ultimate desilting effect is less affected by the operating order of the desilting tunnels. The patterns of sandfunnels are mainly determined by the sediment property,and