某电站明渠截流优化方案试验对比研究

发布时间：2017-12-30 22:00

本文关键词：某电站明渠截流优化方案试验对比研究　出处：《水利水电技术》2016年05期 　论文类型：期刊论文

【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级电站调控流量及分流建筑物提前分流方式的相关变化规律,比较了不同戗堤方式对截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——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,选取合理的截流流量和分流建筑物有利于降低截流难度,增加工程经济性和安全性。研究成果可供类似工程参考。
[Abstract]:Aiming at the open channel closure project with high velocity, large drop and high single wide power, the physical model method is used to carry out the experiment. The relationship between the hydraulic parameters of the closure and the regulating flow of the upstream cascade power station and the early diversion mode of the distributary building is obtained. The effects of different embankment ways on the hydraulic indexes of closure are compared. Through the comparative test and analysis, it is proved that the reasonable flow regulation measure of the Longkou is the diversion hole of the sand guiding ridge, and its setting can effectively reduce the throwing volume of the closure port. The study shows that for the open channel closure with high drop difference and high velocity, reasonable closure flow and shunt buildings are helpful to reduce the difficulty of closure. The research results can be used as reference for similar projects.
【作者单位】：四川大学;中国电建集团成都勘测设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51279118)
【分类号】：TV551.2
【正文快照】： 1研究背景近年来我国水利工程建设进入高峰期,明渠截流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[1]。我国早期或前期的较大一部分的明渠截流工程截流流速不大或者落差不高[2-4]。但随着施工技术和管理水平的发展[5],水利工程截流龙口落差、流速等水力学指标也越来

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