天津港外航道水动力条件及工程泥沙淤积研究

Research on Hydrodynamic Conditions and Siltation in Outer Channel of Tianjin Port

依据最新的水文、泥沙实测资料,利用风浪潮流泥沙数值模型对开挖深水航道泥沙淤积情况进行了计算。根据近年来现场实测水文、泥沙资料,结合本项研究工作进行了统计分析,为数模计算提供参数;建立了多重嵌套潮流数学模型,计算正常天气下工程实施前、后的海域潮流场分布情况;建立了海域风浪过程计算模型和泥沙运动模型,将波浪、潮流、泥沙模型耦合,计算了在年均含沙量的风浪条件作用下所造成的回淤情况,给出了航道建成后的年淤积分布情况。提出了天津港南、北防波堤延伸到16+0后的航道的淤强分布特征,从泥沙方面为航道的开挖提供了设计依据。

By using wind, wave, tidal current, sediment numerical models based on the up-to-data hydrology, sediment data of field observation and remote sensing data, sediment siltation in the deep channel is computed. According to the hydrological and sediment data of field observation in recent years, statistical analysis is done for the research and the parameters for the numerical model is Provided. By building up the multiple nested tidal numerical models, current field before or after the execution of a project under regular weather is simulated. By building up the wind-wave numerical models of the sea and the sediment transport model, wave, tide and sediment models are coupled. The yearly averaged sediment concentration is first computed under the wind and wave action, then the sediment siltation is computed and the annual deposition distribution is also obtained after the channel is built. This paper proposes the characteristics of the deposition distribution in the deep channel after the south and north breakwaters extend to 16＋0 km and provides design basis for the excation of the channel.