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在平原细沙河流的动床模型设计中 ,只考虑推移质运动的相似是不正确的 ,主要应考虑悬移质运动的相似 ,并且可以只考虑悬移质中床沙质运动的相似 .以相似函数形式表达的分段起动流速 (8)～ (11)式 ,可用以计算确定模型沙的粒径 ,使泥沙粒径的模拟符合相似理论的基本要求 ,从而提高其可靠性 .应用文中提出的模型相似律及模型设计要点 ,进行了长江八卦洲宝塔水道挖槽淤积动床模型的设计及试验 ,取得了地形冲淤验证试验的相似 ,挖槽淤积量预报与工程后原型观测的淤积量基本接近
In the design of the moving bed model of the plain sandy river, it is incorrect to consider only the similarity of the thrusting motion, and the similarity of the suspended motion should mainly be considered, and only the similarities of the sandy movement in the suspended load can be considered. Similar to the function of the expression of the sub-step flow velocity (8) ~ (11), can be used to determine the model sand particle size, so that the simulation of sediment particle size to meet the basic requirements of similar theory, thereby enhancing its reliability. The proposed model similarity law and the key points of the model design are as follows: The design and test of the dynamic model of the silt accumulation in the Baotu waterway of the Bagua River in the Yangtze River have been carried out. The similarity of the topographic erosion and deposition verification test, the forecast of the silo volume and the post- The amount of basic close