二维水动力学模型在东亭河大桥洪水影响评价中应用

Application of two-dimensional hydrodynamic model in flow impact assessment of Dongtinghe Bridge

文章建立基于非结构网格的二维水流数学模型,分析了不同数量桥梁方案下河道水位、流速与局部流场的变化对河道的影响,还对桥梁群中桥墩的布置型式进行了分析。研究结果表明该二维模型能较直观的反应桥址处水流流态,其模拟精度能满足对该河段洪水分析的要求,且工程建设产生的壅水、绕流等影响均为局部范围。

This paper establishes a two-dimensional hydrodynamic model based on unstructured grids.It analyzes the influences of river channel water level,flow velocity and Change of local flow field under different number of bridge schemes.At the same time,arrangement type of piers are analyzed.It can be seen from the results that the two-dimensional model can directly reflect the flow pattern at the bridge site,and its simulation accuracy can meet the flood analysis of this river section.The impacts of the project construction are all within the local scope.