湘祁二线船闸平面布置方案及设计优化创新

Layout plan and optimal design innovation of Xiangqi second-line ship lock

扩建二线船闸应综合考虑地形、施工、通航、征拆、投资等制约因素。以湘祁二线船闸工程为例,重点论述二线船闸设计原则、选址及平面布置思路及方法,比选得出布置在一线船闸左岸、两闸轴线间距80 m、船舶直进曲出的方案。通过物理模型试验对口门区通航水流条件进行分析与优化,提出延长上、下游隔流墙、疏浚电站下游河床、优化调度方式等措施,改善了口门区水流条件。针对浮式检修门库、靠船墩、隔流墙,提出了具有较强通用性的创新与优化设计理念。

During the expansion of a second-line ship lock,constraints such as the terrain,construction,navigation,land acquisition and demolition,and investment should be comprehensively considered.Taking the Xiangqi second-line ship lock project as an example,this paper focuses on the design principles,site selection,and layout ideas and methods of the second-line ship lock and comparatively selects a layout scheme:It should be on the left bank of the first-line ship lock,and the distance between the axes of the two locks is 80 m,with the ship going straight in and curving out.We use the physical model test to analyze and optimize the navigable flow conditions of the entrance area and put forward the measures to improve the navigable flow conditions,such as extending the upstream and downstream partition walls,dredging the downstream riverbed of the power station,and optimizing the dispatching mode.Moreover,we propose the innovation and optimal design concept with strong universality for the floating access gates,breasting dolphins,and partition walls.