港珠澳大桥建设对水沙环境影响数学模型研究——Ⅱ.模型的应用

Mathematical modeling of the effect of constructing Hongkong-Zhuhai-Macao bridge on hydrodynamic sediment environment:Ⅱ.Application of the model

对港珠澳大桥工程方案实施后潮流泥沙进行数值模拟,将桥墩附近网格进行加密处理,把桥墩本身刻画为固边界。根据数值模拟结果,对大桥工程实施后附近海区潮位、流速和潮量变化及水下地形冲淤变化进行了分析,研究结果表明,港珠澳大桥对伶仃洋海域潮流泥沙影响仅限于大桥附近,对伶仃洋滩槽格局没有影响,对伶仃航道没有负面影响。

The numerical simulations of tidal current and sediment are carried out after the implementation of the project of Hongkong-Zhuhai-Macao bridge.The piers are treated as solid boundary and the grids near the piers are enriched.According to the results of the numerical simulation,the changes of tidal level,velocity of tidal current,tidal volume and the siltation and erosion of the underwater topography in nearby sea area after the implementation of the project are analyzed.The results show that the effect of constructing Hongkong-Zhuhai-Macao bridge on the hydrodynamic sediment environment is only limited to the vicinity of the bridge,and it has no negative effect on Lingding navigational channel and has no influence on the patterns of shoal and channels of Lingdingyang bay.