苏只水电站1号机蜗壳顶板裂缝处理

Treatment of Crack in Concrete Roof of Worm Wheel of No.1 Set,Suzhi Hydropower Station

苏只水电站在厂房1号机组蜗壳顶板混凝土浇筑过程中,发生模板支撑变形造成新浇混凝土下沉,仓面裂缝,混凝土浇筑中断的质量事故。分析了产生事故的原因,采用凿槽回填膨胀混凝土、化学灌浆以及结构补强工程处理措施后,检测资料表明,该部位施工质量总体满足设计和规范要求。

During pouring the concrete roof of worm wheel No.1 set, the poured concrete was sunken, cracks occurred at the surface of storehouse, and construction was interrupted. The cause of the accident was analyzed, the measures of excavating slot for backfill expansive concrete, chemical grouting and consolidating structures were taken. It was shown by inspect data that the local quality of construction up to par of design and national standard.