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天生桥一级水电站溢洪道水头高,流速高,泄量大,泄洪功率大,高速水流问题较为突出.本文在模型试验的基础上,初步研究了该溢洪系统对泄流能力的制约和影响、明渠连接渐变段的体型选择、斜尾墩消除水冠、陡槽水流平面扩散角的选择、泄洪水流与河道斜交时的顶冲回流与消能防冲等水力学问题,并通过分析研究得出了一些有益的结论.
The Tianshengqiao First-class Hydropower Station Spillway head high, high flow rate, large discharge capacity, flood discharge power, high-speed flow problems are more prominent.This paper based on the model test, the preliminary study of the spillway system on the discharge capacity constraints and impact of open channel The choice of the shape of the connecting gradient section, the elimination of the water crown at the slant pier, the choice of the diffusion angle of the steep channel flow surface, the top-flushing backflow and the energy dissipation and erosion prevention when the flood discharge flow and the river channel are skewed, Some useful conclusions.