在大模板建筑和砖混结构建筑中,楼板一般都采用预制的预应力圆孔板。这种楼板在吊装之前,要将板孔堵严。堵孔操作虽很简单,却很重要。因为圆孔板端头直接承受由上边墙体传递下来的结构重量(图1),能不能处理好圆孔板堵头,也就将直接影响工程质量和结构安全。过去的传统作法是将圆孔板端头用碎 In large formwork buildings and brick-concrete buildings, prefabricated prestressed circular orifice plates are generally used for floor slabs. Before this kind of floor slab is hoisted, it is necessary to block the hole. Although the hole blocking operation is very simple, it is very important. Because the end of the circular hole plate directly bears the weight of the structure transferred from the upper wall (Figure 1), it can directly handle the quality of the project and the safety of the structure. The traditional practice of the past was to use the ends of round hole plates