超长结构温度预应力筋控制裂缝施工技术

On crack control construction technology with temperature prestressing tendon of super-long structure

针对工程超长结构裂缝问题,采取设置后浇带方法及布设温度预应力筋技术,结合后浇带与预应力技术的优势,在后浇带封闭以前,张拉预应力筋,使得预应力效应得以充分建立;后浇带封闭以后,结构形成受力整体,从而对确保工程质量起到了重要作用。

According to the adopted post-pouring band method and the layout of the temperature prestressing tendon technique in the cracks problems of the super-long structure,the paper combining with the advantages of the post-pouring band and the prestressing technique,fully establishes the prestressing effect by stretching the prestressing tendon before sealing the post-pouring band,and forms the stress integration in the structure after the sealing of the post-pouring band,so as to ensure the important role of the engineering quality.