事故闸门与露天水池相结合调压井设计研究

Research on design of surge shaft by combining emergency gate with outdoor pool

针对高水头、大流量、长引水隧洞的水电站,调压井布置受地形、地质条件限制以及常规型式不能满足设计要求的问题,以柏香林水电站为例,对比了事故闸门与蝶阀方案,以及各种调压井型式,通过调压井结构计算和水力计算论证了事故闸门与露天水池相结合调压井设计的合理性。结果表明:事故闸门与露天水池相结合调压井具有事故闸门和水室式调压井的优点,安全可靠性较高,且方便检修管理。该型式调压井可有效地减少涌波高度,从而降低调压井的高度,节省工程量,减少投资,具有经济性和适用性,有效地解决了特殊地形地质条件调压井设计的难题,因此对调压井设计具有重要的参考价值。

Aiming at the hydropower station of high head,large flow and long diversion tunnel,and that the conventional type can not meet the design requirements by the effect of terrain and geological conditions on surge shaft,taking Boxianglin hydropower station for example,the paper compared the emergency gate and butterfly valve scheme and a variety of surge shaft types. Through the surge shaft structure calculation and hydraulic calculation,it demonstrated the reasonability of design of surge shaft by combining the emergency gate with open-air pool. The results show that the combination of emergency gate and open-air pool,the surge shaft has the advantages of the emergency gate and water chamber surge shaft,higher safety and reliability,convenient management and maintenance,effective reduction of surge wave height,decrease of surge height,save of amount of work,reduction of investment,This kind of surge shaft has economy and applicability,and can effectively solve the problem of surge tank design under special topographic and geological conditions. The result has important reference value for the design of surge shaft.