在装配式楼面、屋面中,常常产生沿板跨方向的裂缝,特别是在阳台或外挑梁端部,顺板方向的裂缝尤为普遍,这种裂缝一般都是沿板通长、上下贯通,楼面积水时向下层渗漏,给使用者造成很大的心理压力。 In prefabricated floors and roofs, cracks are often generated along the direction of the board, especially at the ends of the balconies or the outer beams. Cracks along the direction of the board are particularly common. These cracks are generally along the length of the board. When the water in the floor area leaks into the lower floor, it will cause great psychological pressure on the user.