接缝构造防水的设计和施工,经多年工程实践考验,证明是一种行之有效的防水做法,目前已在予制外墙板建筑中普遍推广使用。构造防水是在接缝外口设置适当的线型构造,如立缝的沟槽,平缝的挡水台、披水等,形成空腔,截断毛细管通路,利用排水构造将渗入板缝的雨水排出墙外,防止向室内渗漏。设计方案见图1 The design and construction of joint construction waterproofing, after many years of engineering practice tests, proved to be an effective waterproof practice, which has been widely used in prefabricated exterior wallboard construction. Construction waterproofing is to set a suitable linear structure at the outer joint of the joint, such as the groove of the vertical seam, the water-blocking platform of the flat seam, and the water dripping, forming a cavity, cutting off the capillary passage, and using the drainage structure to infiltrate the rainwater that penetrates the panel. Evacuate the wall to prevent leakage into the room. Design scheme shown in Figure 1