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本文根据流体力学和河流动力学的基本原理，对桥周围的水流结构及其形成原因和冲刷深度计算方法进行了分析和讨论。通过模型试验对桥台冲刷的跟踪测量，按照冲刷发展的不同阶段分析了桥台周围局部冲刷坑的形成过程，以及上游滞水区随水深和桥台路堤长度的变化趋势。根据试验，用量纲分析原理和逐步回归分析的方法，提出桥台冲刷深度与主要影响因素的关系式。
Based on the basic principles of fluid mechanics and river dynamics, this paper analyzes and discusses the water flow structure around the bridge, its formation reason and the calculation method of erosion depth. Through the model tests, the formation of the local scouring pits around the abutment and the trend of the upstream stagnant water area with the depth of water and the length of abutment embankment are analyzed according to the different phases of scouring. According to the experiment, with the principle of dimension analysis and stepwise regression analysis, the relationship between the abutment erosion depth and the main influencing factors is proposed.