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对缅甸宛江桥桥墩周围的冲刷、桥梁通车时的稳定性及其对通航条件的影响进行分析.HEC-RAS模型用来对河道中的水流状况尤其是在桥正常运营时航道内的水流条件进行实际分析,旨在预测桥墩周围可能发生的最大冲刷,并将结论用于缅甸将来的桥梁建设事业之中.模型计算的结果与实测冲刷作了比较,在急流时,使用相同糙率的情况下,一维数值模拟得较好,数值模拟得到的水位与观测的结果一致,表明HEC-RAS模型预测冲刷深度是可行的.
The erosion around the pier of Wanjiang Bridge in Myanmar, the stability of the bridge when it is open to traffic and its influence on the navigation conditions are analyzed.The HEC-RAS model is used to analyze the water flow conditions in the river channel, especially the water flow conditions in the channel when the bridge is in normal operation The actual analysis is aimed at predicting the maximum scour that may occur around the piers and to apply the conclusions to future bridge construction in Myanmar.The results of the model comparisons are compared with the measured scour in the case of the same roughness , The one-dimensional numerical simulation is better, and the water level obtained by numerical simulation is consistent with the observation results, which shows that it is feasible to predict the erosion depth by HEC-RAS model.