多层住宅楼采用预应力多孔板,由于灌缝工艺问题,导致顶棚裂缝渗漏,这是施工中的难题。近4年来,我们改进了几次灌缝工艺,基本消除了顶棚纵向裂缝和渗漏。灌缝工艺如下。1.吊装多孔板前要排板,确定板的安装住置。吊装时一次就位,避免二次就位影响坐浆效果。板下口缝以20～40mm为宜。靠纵墙 The multi-story residential building adopts prestressed porous plates. Due to the problem of pouring seams, leakage of cracks in the roof is caused. This is a problem in construction. In the past four years, we have improved several grouting processes and basically eliminated longitudinal cracks and leakage in the roof. The filling process is as follows. 1. Before lifting the perforated plate, arrange the plate and confirm the installation and residence of the plate. Once in the hoisting position, to avoid the second seat in place affect the siting effect. It is advisable to sew 20~40mm under the plate. By vertical wall