开敞式粉砂淤泥质航道维护技术

Maintenance technology for open silty silt channel

开敞式粉砂淤泥质航道常年淤积,如何在维护方案优化中考虑淤积特性的影响,兼顾通航安全性与疏浚工程经济性,是业界关注的热点问题。采用实测资料分析与数值模拟相结合,针对某开敞式粉砂淤泥质航道建立考虑波流耦合的泥沙数学模型,对比多种维护疏浚方案年回淤量,评估不同疏浚指标对航道回淤量的敏感性。结果表明,开敞式粉砂淤泥质航道疏浚宽度的增加可有效减小年回淤量。研究成果可为开敞式粉砂淤泥质航道的维护方案优化提供参考。

The open silty silt channel is silted all the year long.How to balance navigational safety and the economic feasibility of dredging projects while considering the influence of sedimentation characteristics has become a focal point of concern in the industry.Based on the analysis of measured data and numerical simulation,this paper establishes a mathematical sediment model considering the coupling of wave and current for an open silty silt channel,and compares the annual re-sedimentation rates of various maintenance dredging schemes to evaluate the sensitivity of these rates to different dredging indexes.The results show that the increase of dredging width of open silty silt channel can effectively reduce the annual re-sediment.The research results can provide reference for the optimization of the maintenance scheme of the open silty silt channel.