双河口水电站窄缝式挑流消能鼻坎体形设计  

Shape design of narrow-channel flip bucket of Shuanghekou Hydropower Station

作　　者：曾红 余玉亮 

机构地区：[1]贵州省水利水电勘测设计研究院,贵州贵阳550002

出　　处：《人民长江》2013年第20期4-6,共3页Yangtze River

摘　　要：双河口水电站是一座以发电为主的大(二)型山区水电站。为减少岸边式溢洪道工程量,设计巧妙地利用陡坡地形布置泄槽;为减小下泄水流对河床及两岸坡的冲刷,设计人员结合水力学模型试验,不断优化调整挑流鼻坎段的收缩比和水舌出坎的方向,最终获得了合适的窄缝挑坎体型。水工模型试验及蓄水后汛期的实际泄流表明,下泄水流流态较好,减轻了对河床、坝脚及右岸坡的冲刷下切,同时减弱了两岸的回流强度,证明该窄缝式挑流消能体型设计是合理的。总结了溢洪道的设计,对山区类似工程有一定的参考意义。Shuanghekou Hydropower Station, with power generation as the main object, is a large - II scaled hydropower station in mountainous area. In the design, steep slope terrain was utilized to arrange the spilling channel, thus engineering quantity of the bank spillway was reduced. For mitigating the flow scouring to river bed and bank slope, shrinkage ratio of the flip bucket and jet direction of the water tongue was optimized through hydraulic tests, and the most reasonable narrow - channel ski - jump was proposed. It is proved by hydraulic tests and practical operation in flood season that the design of narrow - channel ski - jump dissipation is reasonable, which can mitigate flow scouring to river bed, dam toe and right bank slope, and the reflux intensity of two banks is decreased.

关 键 词：窄缝式挑坎 收缩比 溢洪道 双河口水电站 

分 类 号：TV65[水利工程—水利水电工程]