上游引航道透空隔流堤布置与通航水流条件优化  

Layout of open-type separation levee and optimization of navigation flow conditions in upstream approach channel

作　　者：郑红杰 ZHENG Hong-jie(No.4 Engineering Branch Company of CRCC Harbor&Engineering Bureau Group Co.,Ltd.,Chongqing 400025,China)

机构地区：[1]中国铁建港航局集团有限公司第四工程分公司,重庆400025

出　　处：《水运工程》2022年第12期146-151,共6页Port & Waterway Engineering

基　　金：国家自然科学基金项目(52109076)。

摘　　要：针对急弯下游布设的上游引航道口门区通航水流条件复杂等问题,依托某航电工程通航水力学模型试验,对比分析不同流量和不同隔流堤与导流墙夹角条件下的上游口门区的流场分布,探究隔流堤与导流墙夹角和上游引航道口门区水流条件之间的关系。结果表明,隔流堤可以有效减小上游引航道内与主航道中存在的流速梯度,减小主流对口门区水流的挤压和摩擦,进而减小口门区横流和回流流速,消除不利于通航的流态。隔流堤与导流墙之间夹角存在阈值,当小于该值时,纵向流速和横向流速均随着夹角的增大而减小;进一步增大则会导致部分主流流入,恶化口门区流态。The navigation flow conditions at the entrance area of the upstream approach channel laid at the downstream of sharp turns are complex.In order to address this issue,this paper carries out a hydraulic model navigation test for a navigation-power project to compare and analyze the flow field distribution at the upstream entrance area under different flow rates and different angles between the separation levee and the guide wall.In addition,the paper explores the relationship between the flow conditions at the entrance area of the upstream approach channel and the angles between the separation levee and the guide wall.The results indicate that the separation levee can effectively reduce the flow velocity gradient in the upstream approach channel and the main channel,alleviate the squeezing and friction caused by the main flow on flows at the entrance area,and then slow the transverse flow and backflow velocities at the entrance area to eliminate flow patterns not conducive to navigation.Furthermore,there is a threshold value for the angle between the separation levee and the guide wall.Specifically,when the angle is smaller than this value,both the longitudinal and transverse flow velocities decrease as the angle increases.On the contrary,once the angle is larger than this value,a partial inflow of mainstream appears,and flow patterns at the entrance area get worse.

关 键 词：上游引航道 流速分布 通航水流条件 流场优化 

分 类 号：U612[交通运输工程—船舶及航道工程]