西藏某小型水库施工导流设计及思考

Construction Diversion Design and Reflections on a Small Reservoir in Xizang

摘要:

近年来,西藏地区陆续规划建设了一批水库,该地区具有海拔高、氧含量低等特点。部分小型水库选址在海拔4 500 m 以上,现场年内冰期时间长、场地空间有限,同时受投资限制,导流方案设计难度大。文章以某小型水库为例,通过分析论证选择汛期施工延长年度施工时长,同时采取直立挡墙结构和坝下埋管克服场地空间对分期导流方式的限制,实现了项目施工期间的导流目标,保障了工程建设的经济和安全。

Abstract:

In recent years, a number of reservoirs have been planned and constructed in Xizang. The region is characterized by high altitude and low oxygen content, with some small reservoirs sited at elevations above 4,500 m. The site features a long annual ice period, limited space, and is constrained by investment, making the design of diversion schemes highly challenging. Take a small reservoir as an example, through analysis and demonstration, this paper selects flood-season construction to extend the annual construction duration, and adopts vertical retaining wall structures and buried pipes under the dam to overcome the limitations of site space on stage diversion methods. The approach achieves the diversion objectives during project construction and ensures the economic viability and safety of the engineering works.