用预制空心板建造的楼面或走廊经常会发现在预制楼板的搁置处端头有通长的裂缝,裂缝上口宽约2～4mm。这些楼面上的裂缝,破坏建筑物的整洁,影响美观,影响使用功能。裂缝原因分析:预制钢筋混凝土楼板为单向简支饭,在使用荷载作用下,板中产生挠曲引起板端 Buildings or corridors constructed with prefabricated hollow slabs are often found to have long cracks at the end of the prefabricated floor where the shelving is located. The upper crack opening is about 2 to 4 mm wide. The cracks on these floors destroy the cleanliness of buildings, affect the appearance, and affect the use of functions. Cause analysis of cracks: The prefabricated reinforced concrete floor is a one-way simple-support rice, under the use of load, the board produces a deflection caused by the end of the board