清山河水电站洞内式前池基于Saint-Venant方程的涌波模拟

Simulation of Intra-Cave surge in Qingshanhe hydropower station based on Saint-Venant equation

鉴于部分山区水电站附近山体陡峭,在隧洞出口山坡上难以布置压力前池,本文以清山河水电站洞内式前池为工程实例,基于Saint-Venant方程进行涌波模拟分析,论证在隧洞出口设置洞内式前池的可行性.通过模拟分析表明,清山河水电站洞内式前池正涌波传播过程中,隧洞、前池的水面线未超出设计流量全部从溢流堰溢出时的恒定流水面线,负涌波传播过程中隧洞、前池的水面线降幅较小,压力管道淹没水深富余,设置洞内式前池安全可行.

Because of the steep mountain near the exit of some hydropower stations,it is difficult to arrange pressure front ponds on the exit slopes. This paper takes the tunnel front ponds of Qingshanhe hydropower station as an engineering example to simulate and analyze the surge wave based on Saint -Venant equation. To determine the feasibility of setting the tunnel exit hole in the front pool. The simulation analysis shows that during the positive wave propagation of the front pool of the Qingshanhe hydropower station. The water surface line of the tunnel and the front pool does not exceed the constant flow surface line when the design flow overflows from the overflow weir. During the process of negative surge wave propagation,the surface line of tunnel and forebay decreases slightly. The pressure pipeline is submerged in water and deep. It is safe and feasible to set the front pool in the tunnel.