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文章结合河南省内乡县打磨岗灌区烟草水源工程雲露湖水库碾压混凝土大坝台阶式溢流坝面设计,采用两种计算方法,对三种不同台阶尺寸的坝面消能效果进行了水力计算。其结果表明,台阶式溢流坝在一定的下泄流量范围内,由于台阶间形成强烈的横向漩滚、水流掺气,显著提高了坝面的消能效果,但随着泄量的增大,消能率逐渐降低,也即小流量情况下消能效果好,大流量情况下消能效果差,故台阶式溢流坝适宜在单宽流量不大的情况下采用。
Combining with the design of the stepped overflow dam surface of the Yunluhu Reservoir RCC dam for the tobacco water source project in Shajinggeng Kong Irrigation District, Neixiang County, Henan Province, two kinds of calculation methods were used to calculate the dam surface energy dissipation effect of three different step sizes Hydraulic Calculation. The results show that the step overflow spillway, due to the strong lateral swirling between the steps and the aeration of the water flow, significantly improves the energy dissipation effect of the dam surface within a certain discharge flow range. However, as the discharge volume increases, The energy dissipation rate is gradually reduced, that is, the energy dissipation effect is good under small flow conditions, and the energy dissipation effect is poor under large flow conditions. Therefore, the stepped overflow dam is suitable for use under the condition of small single-flow.