桥台最大清水冲刷深度的探讨

桥台冲刷问题没有明确的分类，且最大清水冲刷深度的计算公式虽多但难以选用．基于桥台的冲刷机理，分别按来流情况和桥位河道断面形状对桥台问题进行了归类．根据实测数据，对各种类型的最大冲刷深度计算公式作了比较分析，并进行了评价．最后认为：Dongol公式作为桥台最大清水冲刷深度的计算式较为理想．

Research on the largest clear-water scour depth at bridge abutments

There is no convincing classification of the type of scour around bridge abutments,and the methads for calculation of the largest clear\|water scour depth are numerous and not selected easily. The development mechanism of the scour at abutments,and dassifies the type of scour at abutments on the basis of the approach flow condition and channel geometry. Then various expressions for the largest clear\|water scour depth were analyzed and estimated respectively based on experimental results. At last, the Dongol's expression is proposed for estimating the largest clear\|water scour depth around bridge abutments.