三峡工程地下电站引水区泥沙冲淤变化研究  

Variation of Sedimentation and Scour in the Diversion Area of Underground Power Station of Three Gorges Project

作　　者：黄建成[1] 金中武[1] 陈义武[1] 

机构地区：[1]长江科学院河流研究所,武汉430010

出　　处：《长江科学院院报》2012年第10期16-20,共5页Journal of Changjiang River Scientific Research Institute

摘　　要：水电站引水区的河床演变特点和水沙运动规律,对电站引水发电具有重要影响。根据三峡工程蓄水初期2006年4月至2011年8月地下电站引水区3次实测地形资料和模型试验成果,分析了地下电站引水区泥沙冲淤变化特点和电站排沙孔开启后的排沙效果。认为三峡工程运用后地下电站引水区受河段边界条件和水流运动特性的影响,河床泥沙呈累积性淤积,地下电站排沙孔的作用主要是形成冲刷漏斗保持电站厂前门前清,而对整个引水区的排沙作用有限。为此,建议进一步开展三峡工程地下电站排沙孔排沙效果试验研究,优化排沙措施,以保证地下电站引水安全。The riverbed evolution characteristics and sediment transport in the diversion area of underground hydro- power station have great effects on the water-intake and power generation. According to terrain data of the diversion area of the underground power station measured three times from April, 2006 to August, 2011 in the initial im- poundment of Three Gorges Project, in association with model test results, the authors investigated the sedimenta- tion and scour in the diversion area, as well as the desilting effect when the desihing outlets were opened. It＇ s be- lieved that since the diversion area was influenced by boundary conditions and flow characteristics, the deposition on the riverbed was accumulated. What＇ s more, the desilting outlets of the underground powerhouse mainly func- tioned as keeping the water in front of the station clean by producing a scoured funnel, but did little good for the desihing in the whole diversion area. In view of this, further model tests on the sand-flushing effect of the desihing outlets should be carried out. The desilting measures should be refined to guarantee the water diversion safety of the underground hydropower station.

关 键 词：三峡工程 地下电站 泥沙冲淤 排沙效果 

分 类 号：TV145.1[水利工程—水力学及河流动力学]