龙滩水电站左岸地下厂房蜗壳二期混凝土施工

对蜗壳二期混凝土施工工艺流程,蜗壳支墩顶部、座环和基础环底部、蜗壳底部混凝土浇筑,蜗壳二期混凝土回填灌浆施工方法以及施工计划和工期进行了探讨,决定采用蜗壳二期混凝土分层分块薄层浇筑方案,并较好的解决了蜗壳位移,变形问题,浇筑完成后基本无脱空现象。

Second-stage Concrete Construction of Spiral Case of Left-bank Underground Powerhouse of Longtan Hydropower Station

This paper discusses the construction technique flow of the second-stage concrete of the spiral case, the concrete pouring of the top buttress of spiral case, base ring and foundation ring bottom and the bottom of spiral case, the construction method and schedule of concrete backfill grouting for the second-stage concrete of spiral case, The alternative of thin layer pouring by section and by layer was adopted in the second-stage concrete construction of spiral case,which solves the displacement and deformation problems of spiral case.After the completion of pouring.no cavity situation is found.