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泄水工程中大量应用设置尾槛的消力池．水流对尾槛冲击力的研究，国内外多采用模型实验和经验公式的方法．现从动量理论出发探讨了水流对尾槛的冲击力，并对现行规范提出一些看法．
Siphon works in a large number of applications set the tail threshold of the power pool. Water flow on the tail threshold impact of the study, the domestic and international more use of model experiments and empirical formula method. Starting from the momentum theory to explore the impact of water on the tail of the threshold, and put forward some views on the current norms.