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本文以瞬变流模型为基础，在三峡溢流坝断面模型冲坑底部，详细地量测了不同尺寸岩块上的脉动上举力，获得脉动上举力的统计资料，验证了解交流理论的分析成果，为探讨基岩的冲刷机理和水垫塘内混凝土底板块的设计提供了科学依据．
In this paper, based on the transient flow model, the statistical data of pulsating uplift force on different sizes of rock mass were measured in detail at the bottom of the scouring pit of the Three Gorges overflow dam section. The results provide a scientific basis for discussing the scouring mechanism of bedrock and the design of concrete floor slab in plunge pool.