采用预制钢筋混凝土板的楼地面往往沿楼板拼缝方向产生纵向裂缝,这一问题在国内普遍存在,并已成为地面工程中的一项质量通病。据沈阳市区内调查,在近三万平方米的住宅中(其中包括已住人二年以上及已交付使用但未住人的住宅),普遍存在着数量不等,程度不同的纵向裂缝。调查情况见表1。这些裂缝的存在,不仅影响建筑物外观质量,降低使用效果,而且影响了结构的内在质量,甚至 The use of prefabricated reinforced concrete slabs tends to produce longitudinal cracks along the seams of the floor slabs. This problem is widespread in China and has become a common problem in surface engineering. According to investigations in Shenyang, in the nearly 30,000 square meters of houses (including residences that have been inhabited for more than two years and have been delivered but not yet occupied), there are widespread longitudinal cracks of varying degrees. The survey status is shown in Table 1. The existence of these cracks not only affects the appearance quality of the building, reduces the use effect, but also affects the internal quality of the structure, even