某电站明渠截流优化方案试验对比研究.pdf

水利水电技术第47巻2016年第5期
电站明渠撒流恍化方與試验赙比研兜
李酚',雷运华2,张建民
四川大学水力学与山区河流开发保护国家重点试验,四川成都610065;
2.中国电建集团成都勘测设计研究院有限公司,四川成都610072)
摘要:针对流速高、落差大、单宽功率高的明渠截流工程,采用物理模型方法进行试验,获得了截
流水力学参数与上游梯級电站调控流量及分流建筑物提前分流方式的相关变化規律,比较了不同戗堤
方式对战流水力学指标的影响。通过对比试验与分析,论证了合理的龙口流量调控措施一一导沙坎分
流孔,其设置可有效降低截流龙口抛投量、尺寸及其流失率。研究表明,对于高落差,大流速并存的
明渠截流而言,选取合理的流流量和分流建筑物有利于降低裁流难度,増加工程经济性和安全性。
研究成果可供类似工程参考。
关键词:截流;高沆;大落差;龙ロ;流量调控;水力学参数;模型试验
doi:10.13928/j.cnki. wrahe.2016.05.009
中图分类号;TV13
文献标识码;A
文章编号:1000800(2016)05-0038-05
Experimental and comparative study on optimal scheme of open-channel closure for
construction of a hydropower station
LI Pan. LEI Yunhua.ZHANG Jianmin
(1. tate Key ab. of Hydraulics and Mountain River Engneering Sichuan University, Chengdu 610065, Sichuan, China
2. Power China Chengdu Engineering Corporation, Chengdu 610072, Sichuan, China)
Abstract; For the open-channel closure projeet with high fow velocity, large head and high unit-width power, experiment is
made with the method of physical model, and then the hydraulic parameters of the closure es well as the regulated flow rate of the
ostream cascade hydropower station and the relevant variation of the adanced diversion mode of the diversion structure are b
tained, while the impacts from the modes of various closure dykes on the closure hydraulic indexes are ompared. Through the
experiment and comparison, a reasonable measure for regulating the gop flow rate mthe diversion orifice of sand-guide sil is
verified, of which the arrangement can effectvely deerease the quantity, size and loss rate of the dunping materials. The study
shows that for the open-channel closure with high head and large flow veloeity, choosing reasonahle closure flow rate and diver
sion structure is favorable to lower the closure dificulty and enhance the economics and safety of the project. This study result can
provide references for the similar project concerned
Key words: closure; high flow velocity; high head; gap; flow rate regulation; hydraulic parameter; model experiment
1研究背景
流速等水力学指标也越来越高?,截流施工强度和
难度也越来越大。但高流速、大落差、高单宽功率并
近年来我国水利丁程建设进入高峰期,明渠截流存的截流相关研究成果还比较缺乏。如何解决高流速、
是采用明渠分期导流建设的大中型水利工程的控制性
环节り。我国早期或前期的较大一部分的明渠截流
收稿日期:2016-0)-18
工程截流流速不大或者落差不高2。但随着施工技
基金项目:国家自然科学基金资勘项目(51279118)。
术和管理水平的发展],水利工程截流龙口落差、作者简介:李(1989-),男,硕士研究生。
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ater Resownes and Hydmopoaver Engineening Vol. 47 No5
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