大岗山水电站施工期渡汛方案试验研究  

Model test of flood handling during construction of Dagangshan Hydropower Station

作　　者：王继保[1,2] 郭红民[1] 

机构地区：[1]三峡大学土木水电工程学院,湖北宜昌443002 [2]河海大学水利水电工程学院,江苏南京210098

出　　处：《水利水运工程学报》2010年第2期21-27,共7页Hydro-Science and Engineering

基　　金：国家自然科学基金资助项目(50579084)

摘　　要：为确保大岗山水电站2008年施工期安全渡汛,保护已建工程免受洪水毁损,进行了施工渡汛水力学模型试验研究.通过水工模型试验,对设计渡汛方案进行了对比试验并提出了推荐方案,观察了渡汛时全河床过流时的水流流态,测试了上、下游围堰堰面过流时的水面线、流态、脉动压力、流速分布等水力特性并观测了围堰堰面过流时的冲刷及破坏情况;通过动床试验,研究了汛期基坑不同堆渣高程河床过流时的水流流态,下游石渣的冲刷流失情况;为大岗山水电站的安全渡汛设计及施工提供了可靠的科学依据.To ensure the safety of the engineering project already constructed of the Dagangshan Hydropower Station in the high water season,the hydraulic model study on the scheme of flood handling during the construction period of Dagangshan Hydropower Station is carried out.The flow condition of the flood water in the entire river bed,and the water line,flow regime,fluctuating pressure,flow velocity distribution,scouring and damaging situation of the cofferdam weir face in the condition of the water overflowing the upstream cofferdam and the downstream cofferdam are observed and recorded during spending flood in the test.Through the moving bed model test,the condition of the flood water flow at different elevations of slag is studied,and the scouring and losing of rock dregs in downstream is observed at the same time.Through the comparison test of the design flood,the recommended scheme is put forward.The test provides the reliable scientific basis for the project security over the flood season.

关 键 词：施工渡汛 围堰 冲刷 模型试验 

分 类 号：TV132.22[水利工程—水力学及河流动力学] TV131.61