西津二线船闸工程上游引航道及口门区围堰设计

Design of Cofferdam in Upstream Approach Channel and Entrance Area of Second Line Lock Project of Xijin Hydro Complex

在西津二线船闸工程上游引航道及口门区围堰设计中,笔者根据主体工程结构特点、地形地质条件以及河流水文特性等因素,对围堰布置及结构形式进行比较分析,完成了围堰设计方案。设计方案中的纵向围堰与永久隔流堤结合,上游横向围堰采用预留坎围堰,施工期堰顶作为施工主干道满足场内交通需要,临建工程投资较省。此设计方案符合规范,经济合理,被工程所采用。

In the design of cofferdam in upstream approach channel and entrance area of Second Line Lock Project of Xijin Hydro Complex, the layout and structure of cofferdam are compared and analyzed according to the structural characteristics of main project, topographic and geological conditions and hydrological characteristics of the river, and the design scheme of cofferdam is completed. The longitudinal cofferdam in the design scheme is combined with the permanent separation dike.Reserved sill cofferdam is used for upstream transverse cofferdam. During the construction period, the top of the cofferdam serves as the main road to meet the traffic demand in the construction site, and the investment in temporary works is relatively low. The design scheme conforms to the specifications, is economical and reasonable, and is adopted by the project.