跨府河伏龙桥工程的行洪论证分析

Flood-discharge Capability Analysis of Fulong Bridge Across Fuhe River

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 order to solve the problem of river flood which is induced by the big pier of new Fulong Bridge across the River Fu,this article reduced the adverse impact by optimizing the local section.And then two-dimensional mathematical model was adopted to simulate and analyze the flood discharge situation of the planning river course before and after building the bridge.The results show that the flow field near the bridge in the engineering reach is adjusted.After building the bridge,the local velocity of flow near the pier will increase,but it reaches the requirements of erosion in generally.In totally,the project satisfies the flood control requirements of two-hundred-year return period flood.The research results can provide theoretical basis for Fulong bridge construction as well as a reference for similar projects.