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针对新建跨府河伏龙桥桥墩尺寸较大,影响河道行洪的问题,通过优化改造伏龙桥工程河段河道断面形式,来减小建桥引起的不利影响。同时采用二维数学模型模拟分析了断面优化前后的行洪过流情况。结果表明,断面改造后,工程河段桥位区附近流场有所调整,桥墩两侧局部流速有所增加,但总体满足抗冲要求,对河道行洪影响较小,拟建桥梁工程总体可满足200年一遇洪水防洪要求。研究结果可为伏龙桥工程建设提供理论依据,也可为类似工程提供参考。
In view of the large size of the new Fulong Bridge pier across the river and affecting the flood discharge of the river course, the unfavorable impact caused by the bridge construction is reduced by optimizing the cross-section of the river section of the Fulongqiao Project. At the same time, using two-dimensional mathematical model to simulate the cross-section optimization of flood before and after the flood situation. The results show that the flow field near the bridge site of the engineering river section is adjusted after the section reconstruction, and the local flow velocities on both sides of the bridge piers are increased. However, the impact on the flood impact is generally satisfied and the impact on the flood discharge of the river channels is small. Meet flood flood control requirements in 200 years. The results of the study can provide theoretical basis for Fulongqiao project construction and also provide reference for similar projects.