潘口水电站厂房蜗壳二期混凝土施工技术

为了控制和减小潘口水电站厂房二期混凝土浇筑过程中蜗壳的变形，经研究，决定采用通仓浇筑方案。由于电站厂房二期混凝土具有体型尺寸大、结构复杂、钢筋密集、温控要求高，以及浇筑难度大等特点。为了保证混凝土浇筑质量，施工前对混凝土浇筑施工的重点和难点进行了分析，并提出了有针对性的施工方案。由于浇筑方案合理有效，实际施工过程中严格组织实施，使二期混凝土浇筑取得了施工质量高、施工进度快的效果。

Stage II concrete construction technology for spiral case of powerhouse of Pankou Hydropower Station

In order to control and mitigate the spiral case deformation of powerhouse of Pankou Hydropower Station in stage II concrete placement,the scheme of concrete placement without longitudinal joint is taken after discussion.Due to large size,complicated structure,dense steel bar,high temperature control requirement of the concrete,the concrete placement is difficult.In order to guarantee the concrete placement quality,the key points and difficulties of concrete placement are analyzed before construction and the targeted reasonable construction scheme is put forward.Due to reasonable and effective placement scheme and strict implementation in the practical construction,the high construction quality and fast construction progress for stage II concrete placement are achieved.