预应力在超长地下室外墙裂缝控制中的应用

Prestress construction for controlling the cracking of exterior overlength wall of basement

预应力施工技术在工程梁、板、柱中的应用已经很普遍,但是在墙体中的应用还比较少见。在结构长度超长的墙体中采用无黏结预应力技术,可以抵消混凝土的收缩应力和温度应力,提高墙体的抗裂性能。

The prestress construction is commonly used on the beams,slabs and columns,but it is not the same on wall.In the construction of wall with structrual overlength, the unbonded prestress technology can cancell the shrinkage stress and temperature stress of concrete and enhance the cracking resistance of the wall.