分汊河段船闸扩建对已有建筑物运行影响及改善技术研究  

Influence of ship lock extension over branching channel on existing structures and its improvement measures

作　　者：李君涛 冯小香[1] 王鑫 LI Juntao;FENG Xiaoxiang;WANG Xin(Key Laboratory of Engineering Sediment,Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China)

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456

出　　处：《水资源与水工程学报》2020年第2期129-133,141,共6页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51809130)。

摘　　要：航运的发展促使内河航运枢纽中的船闸扩建工程日益增多,在已建枢纽基础上进行船闸扩建势必会改变现有工程河段的边界条件和水动力特征,从而对已有建筑物运行产生影响。结合富春江船闸扩建工程,采用整体物理模型试验,研究了分汊河段扩建船闸对已有建筑物的影响及相关改善技术。结果表明:富春江船闸位于峡谷分汊河段,扩建船闸及导航墙的兴建,导致汊道分流比发生明显改变,左汊主河道分流量增加、水位壅高,对发电、行洪产生不利影响;为减小扩建船闸的影响,需在右汊船闸隔流墙与江心洲之间开挖一条行洪渠道,以尽量维持河道原有分流比,但行洪渠道紧邻下游口门区,受渠道内集中水流影响,口门区通航水流条件不满足要求,船闸通航条件与发电、行洪相互制约;提出了在汊道进口设置节制闸控制分流的创新技术,通过节制闸调节两汊分流比,能够解决船闸通航与枢纽建筑物运行之间的相互影响问题。The development of shipping increases the number of ship lock extension projects in inland navigation hydro-junctions.The extension of ship locks on the basis of existing structures will inevitably change the boundary conditions and hydrodynamic characteristics of the river reach near the existing project,which in turn will impact the operation of the existing structures.Based on the ship lock extension project in Fuchun River,the impact of ship lock extension project on the existing structures and its improvement measures were analyzed through the overall physical model test.Since the ship lock in Fuchun River is located in the branching channel of gorge area,the diversion ratio of branching channels has changed obviously due to the construction of ship lock extension and the guide wall.The water level and flow of the left branch,which is the main channel,increased and affected the power generation and flood discharge adversely.In order to reduce the adverse influence,it is suggested to excavate a flood channel between the partition wall of the right branch and the mid-channel bar to maintain the original diversion ratio of the river to the fullest extent.However,the flood channel is close to the downstream entrance area,and the navigable flow conditions in this area do not meet the requirements under the influence of concentrated flow in the flood channel.Therefore,navigation condition of the ship lock and the function of power generation and flood discharge are incompatible.Finally,the innovative measure of controlling diversion by setting control gate at the entrance of branching channel is put forward.By regulating the diversion ratio of the two branches,the problem of the interaction between ship lock navigation and hydrojunction operation can be solved.

关 键 词：船闸扩建 分汊河段 改善技术 节制闸 枢纽工程 

分 类 号：U641.1[交通运输工程—船舶及航道工程]