I have analyzed it with the method of the scouring mechanism of pier s descending water flow be shaped into U-type volution and the retaining wall is regarded as circular erosion.

• 在分析影响路基结构局部冲刷的因素时，认为有三个方面：即，水流因素（水深、流速及水流冲击角），床沙因素（粒径、级配）、几何边界条件（边坡坡率、结构的型式、几何尺寸等）。