有粘结预应力在252m地下室顶板中的应用

Application of the Cohesive Prestress Technology in Construction of a 252m Basement Head Plate

在总长度 2 5 2m的超长不设缝地下室顶板中 ,采用了预应力、设置后浇带等综合抗裂技术 ,并对有粘结预应力平板的设计理论、施工工艺、锚固体系及超长结构预应力损失控制和抗裂控制作了深入研究。

In construction of the 252m no-seam basement head plate, engineers adopted many comprehensive anti-crack technologies such as prestress, post-pouring zone and so forth, studied some aspects of a cohesive prestressed flat plate such as design principles, construction methods, anchor systems and so on, and researched prestressed loss control methods and anti-crack control methods of ultra-long structures.