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针对黄登水电站泄洪消能原方案存在的问题,通过1∶50整体水工模型试验,研究了传统挑坎(窄缝坎、扩散坎、斜切坎)与新型燕尾坎在黄登水电站表、底孔上的适用性问题,分析了燕尾坎对挑流消能的影响。结果表明,与传统窄缝坎相比,燕尾坎对上游来流的适应性更好,挑坎边墙的动水荷载小,在拉近最近挑距、避免对右岸边坡和下游围堰堰脚冲刷的同时,减小了电站尾水区附近水流的波动,水垫塘内底板基岩的冲淤结果满足“护坡不护底”的要求,可供类似工程参考。
According to the existing problems of flood discharge and energy dissipation scheme of Huangdon Hydropower Station, this paper studied the problems of traditional floodplain (narrow ridge, diffusion ridge, oblique ridge) and new dovetail ridge in Huangdon Hydropower Station through 1:50 overall hydraulic model test, Bottom hole on the applicability of the problem, analysis of the dovetail ridge on the impact of energy dissipation. The results show that the dovetail ridge has better adaptability to the upstream flow than the conventional narrow-gap ridge, and the dynamic water load of the side wall of the cantilever is small, and the distance between the nearest tail and the downstream cofferdam can be avoided. Weir foot erosion at the same time, reducing the wake of the power station near the water flow fluctuations, water cushion pond bottom floor of the scouring and silting results meet “slope protection does not protect the bottom ” requirements for similar projects for reference.