五指山市毛阳桥工程对毛阳河河道行洪影响的数值模拟

为对比分析不同方案下毛阳桥工程建设对河道行洪影响,构建工程所在河段局部二维水动力模型,采用基于三角形网格的有限体积法求解该模型,模拟毛阳桥工程所在河段的水位和流速流向变化情形。结果表明:原设计方案对水位雍高和流速流态均有较大影响,水位最大雍高值0.593 m,流速最大增加值1.909 m/s;改进方案明显减少了对水位和流速流态的不利影响,水位最大雍高值0.088 m,流速最大增加值0.635 m/s,两者的变化幅度均较小,影响范围局限于工程附近,基本不会对河道行洪安全构成威胁。

Numerical simulation of influence of Maoyang bridge in Wuzhishan on flood control of Maoyang river

In order to analyze and compare the effect of constructiom of Maoyang bridge on river flood in different schemes,the paper built a 2D hydrodynamic model which took FVM of triangle mesh to resolve the model,and simulate the variations of water level and velocity and direction of this project.Result indicated that the original project plan has severe effect on the banked-up of water level,flow velocity and state.The biggest high of banked-up is 59.3 cm, and the largest increase value of flow velocity is 1.909 m/s.The improved scheme obviously reduced the adverse effects of water level,flow velocity and direction.The highest banked-up of water level is 8.8cm.The maximum increase value of flow velocity is 0.635m/s. The change ranges of both are small and can't basically threat the operating safety of the river.