我参加过一幢中学实验楼的施工,其屋面檐口部分如图1所示。工程竣工后,每逢大暴雨或连雨天,就会发现楼板与连系梁交接处、挑梁与楼板阴角处以及楼板灌缝处有渗水现象。起初以为是屋面防水有问题,但对屋面防水处理了2次以后,渗水现象仍然存在。我通过雨后多次观察发现,檐板内侧总有一块块的返潮迹象,最后对檐板饰面面砖的勾缝进行了防水 I participated in the construction of a middle school experimental building. The roof of the building is shown in Figure 1. After the completion of the project, whenever there is heavy rain or even rain, it will be found that there is water seepage at the intersection of the floor slab and the connecting beam, the corner of the cantilever beam and the floor of the floor, and the filling seam of the floor slab. At first, it was thought that there was a problem with the waterproofing of the roof, but after the roof was treated twice with water, the seepage phenomenon still existed. After many observations after the rain, I found that there was always a sign of dampness on the inside of the seesaw. Finally, waterproofing was performed on the joints of the seesaw facing tile.