桥墩局部冲刷数值模拟及冲刷深度计算方法对比研究OACSTPCD

With the promotion of the national marine power strategy,the construction of deep-water cross-sea bridge has become the key to connect regional economic development.Pier scour is an important factor threatening the safety of bridge.The correct understanding of scour process and prediction of scour depth can provide guidance for the actual engineering design.Based on the REEF 3D numerical model,the local scour process of three engineering piers was simulated,and the flow field and scour characteristics around the piers were analyzed.On the basis of numerical simulation results,the scour depth of bridge pier was predicted by using national norms,empirical formulas and scour formulas of offshore fan under different conditions.Through the comparison and analysis of scour process and scour depth results under different calculation methods,the selection suggestions of scour depth calculation methods under different water depths are given.