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目前国内河槽一般冲刷公式计算原理主要是在输沙平衡、冲止流速、动力平衡等概念的基础上建立的,这些河槽一般冲刷计算公式仅考虑河槽不拓宽或者拓宽至全桥,实际上河槽冲刷是河槽拓宽及河道加深同时进行的,本文在河相关系及冲止流速的基础上建立可拓宽河槽一般冲刷公式,并采用试算法求出河槽平均冲刷深度,利用单宽流量与冲刷后水深的关系求出冲刷后最大水深。
At present, the calculation principle of general scour formula in river basins is mainly established on the basis of the concepts of sand transport, impulse flow and dynamic balance. The general scour calculation formulas for these channels only consider that the channels do not broaden or broaden to full bridges. In fact, Is to broaden the river channel and to deepen the river channel at the same time. Based on the correlation of the river system and the impinging velocity, a general equation of scouring river channel is established, and the mean scour depth of the channel is calculated by trial method. Find the maximum depth of water after washing.