超长地下室顶板后张预应力法施工

为有效地增加地下室净空,解决地下室超长结构温度应力问题,提高结构抗裂性能和节省造价,地下室顶板设计采用预应力结构,施工过程中采用后张预应力法施工技术,成功实现了超长地下室结构不设变形缝的设计意图。文章对超长地下室顶板后张预应力法施工方法、控制要点及施工中关键技术问题的处理进行归纳、总结,为超长地下室结构不设变形缝的施工提供一定的参考。

Posttension-Prestress techonilogy for overlong basement ceiling construction

To increase space capacity of basement,relieve temperature stress cased by overlong structure of basement,enhance antibreak structure property and save cost,we design the ceiling with Prestress structure. By using Posttension-Prestress tenchnology in the construction,we have acheived the design intent of removing the deform gap from the design of overlong basement. In this paper,we sumrized the method,key techinique of Posttension-Prestress technology for overlong basement ceiling construction. This tenchol...