长江中游燕子窝水道航道整治工程设计

Yanziwo waterway improvement engineering design in the middle reach of the Yangzte River

燕子窝水道是长江中游航道重点碍航浅滩段之一,具备顺直分汊的平面特征,分汊口门易形成碍航浅滩,出现散乱型浅滩时碍航程度最为严重。三峡工程实施后,水道出现了不利调整。已建整治工程实施后,关键部位得到守护,但随着三峡工程的影响程度逐渐加深,燕子窝水道仍出现了不利的调整变化,航道条件仍不稳定。通过对已建工程实施前后燕子窝水道河床演变及碍航特性的分析,提出治理思路及方案,并进行结构设计,重点对新老工程衔接进行细化和优化处理,可为长江航道类似整治工程设计提供经验。

Yanziwo waterway is one of the key navigation-obstructing shoals in the middle reach of the Yangtze River waterway,which has the plane characteristics of straight braided channel,and navigation-obstructing shoals are easily formed at the branched estuary. When the scattered shoal emerges, the navigation-obstructing problem is the most serious. After the implementation of the Three Gorges project, some adverse adjustments appeared.Already running project had guarded the key section. However,with the increasingly impact of the Three Gorges project,the channel condition of Yanziwo waterway is still instable. This paper analyzes the evolution of the river bed and characteristics of the navigation obstruction before and after the construction of the old project and proposes the regulation ideas and solutions. It also puts forward the engineering structure design, focusing on the refinement and optimization processing of the new and old engineering convergence.The research result may provide experience for similar regulation engineering design of the Yangtze River waterway.