大源渡下游口门区通航水流条件改善措施试验  

Experimental research on improvement measures of navigable flow condition at downstream entrance area of Dayuandu navigation

作　　者：刘晓平[1] 徐大彬[1] 李祥[1] 林宇健[1] 

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2016年第1期56-61,共6页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省交通科技项目(201027)

摘　　要：大源渡航电枢纽扩建二线船闸后将造成下游引航道口门区水流条件复杂,影响船舶(队)安全通航。为解决这一工程问题,在充分搜集地质和水文资料的基础上,采用整体水工模型试验,利用疏挖下游河道一定区域并结合布置通航建筑物的措施进行改善,从而使口门区表面流速符合规范要求。根据相关资料和试验数据,着重分析了疏挖前后地形的改变,以及布置导堤和导流墩后对下游口门区水流流态的影响,并阐述了这些工程措施削弱口门区回流和斜流的机理。研究结果表明,河道疏挖与通航建筑物的结合应用可有效改善大源渡下游口门区水流条件,并为类似工程设计提供参考。After the expansion of the second-line ship lock in Dayuandu navigation-power junction,the flow condition at the downstream entrance area of approach channel will become complicated and will impact safe navigation of ship or fleets.In order to improve the flow condition and make the surface velocity at the entrance area suitable to the requirements of the specification,based on fully collecting geological and hydrological data,the overall hydraulic model test is carried out,including digging the downstream river combined with arranging navigation structures.According to relevant materials and experiment data,the effect produced by the change of the terrain before and after digging,and arranging leading dike and diversion piers on water flow regime is emphatically analyzed,along with describing the mechanism of decreasing recirculation and oblique flow at the downstream entrance area.The results showed that the combination of river digging with navigation structures can effectively improve the flow condition at entrance area of Dayuandu navigation,and it will also provide reference for the similar engineering design.

关 键 词：航电枢纽 模型试验 引航道口门区 河道疏挖 导流墩 

分 类 号：TV691[水利工程—水利水电工程]