Abstract: The diversion tunnel No. 2 of a hydropower station in Tibet was inspected after flood exceeding the design standard. For the damage of tunnel bottom slab, the repair methods of fine stone concrete pouring and epoxy mortar plastering were used to achieve good repair effect. The repair methods of this tunnel floor can be used for reference for similar projects.

Key words: post-flood inspection, repair of tunnel bottom slab, epoxy mortar

摘要： 西藏某水电站对遭遇超标准洪水的2号导流隧洞进行了汛后检修，针对隧洞底板破坏情况，采用细石混凝土浇筑和环氧砂浆抹面的修复方法，取得了良好的修复效果，可供类似工程借鉴参考。

关键词: 汛后检查, 隧洞底板修复, 环氧砂浆