摘要
窄深急弯河道下游河道主流偏向凹岸下游一侧,下游已建枢纽在同侧布置引航道则存在上引航道占据河道过流面积较大、流速指标超标严重等问题。采用整体定床物理模型及船模试验,研究窄深河道急弯下游枢纽二线船闸上游引航道的布置及其通航水流条件。结果表明,受窄深河道枢纽上游急弯和长引航道分隔墙占据深泓的影响,设计方案中的船闸上引航道口门区通航水流条件较差,不能满足船舶安全航行要求。优化方案在原方案基础上设置堤头下挑单潜坝,优化右岸河段开挖范围及形式,改变隔流墙长度以及隔流墙透空等措施,较好地改善了口门区通航水流条件并兼顾枢纽的行洪和发电,实现船舶安全通航和枢纽正常运行。
The main flow in the downstream of the narrow and deep channel with sharp turn is inclined to the downstream of concave bank,and approach channel is arranged on the same side of the existing downstream junction,which makes some problems that the upstream approach channel occupies a large flow area and the velocity index exceeds the standard seriously. We study the layout and navigable flow conditions of the upper approach channel of second ship lock at the downstream junction of the sharp turn of a narrow and deep channel by the fixed river bed model and ship model tests. The results show that due to the influence of the sharp turn at the upstream junction of the narrow and deep river and the partition wall of the long approach channel occupying the thalweg,the navigation flow conditions in the entrance area of the approach channel on the lock in the design scheme are poor,which cannot satisfy the requirements of the safe navigation of ships. Based on the original design scheme,the optimization scheme sets a single downstream submarine dike,optimizes the excavation scope and type of the right bank,changes the length and sets holes of the separation wall,improves the navigable flow conditions of the entrance area considering the flood discharge capacity and power generation of junction,and achieves safe navigation of ships and normal operation of the hydro-junction.
作者
刘亚辉
王云莉
张绍培
张绪进
LIU Ya-hui;WANG Yun-li;ZHANG Shao-pei;ZHANG Xu-jin(Southwest Hydraulic Institute for Waterways,Chongqing Jiaotong Unversity,Chongqing 400016,China)
出处
《水运工程》
北大核心
2020年第9期118-125,共8页
Port & Waterway Engineering
关键词
窄深河道
急弯
水利枢纽
上引航道
通航条件
narrow and deep river channel
sharp turn
hydro-junction
upper approach channel
navigable condition
