三峡库尾礁石子急滩成因分析及航道整治

Analysis of navigation hindering characteristics and channel regulation of rapids of Jiaoshizi in the Three Gorges tail of water reservoir

针对长江上游变动回水区河段在三峡水库消落期表现出的复杂通航环境,以广阳坝礁石子河段整治为例,研究该河段浅滩和急滩复合碍航特性。采用船舶阻力计算方法,确定5000吨级船型的自航上滩水力指标,通过定床物理模型试验,得出该河段滩险成因并提出整体治理思路与滩险整治方案。分析整治效果可知,工程实施后,航道尺度达到通航设计标准,可满足5000吨级船舶通航的水流条件。

Aiming at the complex navigation environment in the fluctuating backwater section of the upper reaches of the Yangtze River during the ebb and flow period of the Three Gorges reservoir,this paper studies the comprehensive navigation characteristics of the shoal by taking the remediation of the regulation of Jiaoshizi channel in Guangyangba as an example.This paper determines the self-propelled beach target of the 5,000 tons ship type by ship resistance calculation method,obtains the cause of the risk of the river section through the physical model test,and proposes the overall management ideas and the beach risk remediation plan.The regulation effect shows that the navigation channel scale has reached the navigation design standard after the implementation of the project,which can meet the navigation flow conditions of the 5,000 tons ship.