北京地铁工程防水的总原则是“以防为主、多道防线、刚柔结合、综合治理” ,它的核心是结构自防水。地铁结构的底板、顶板和侧墙均采用防水混凝土 ,防水等级为Ｓ8,兼具承重、围护、防水三重作用。防水混凝土的质量控制需设计、施工、质控 3方密切配合 ,共同把好质量关。地铁防 The general principle of waterproofing of Beijing Metro project is “to prevent the main, multi-line defense, rigid and soft combination, comprehensive management”, its core is self-waterproof structure. Subway structure of the floor, roof and side walls are made of waterproof concrete, water level of S8, both bearing, enclosure, waterproof triple play. Quality control of waterproof concrete to be designed, construction, quality control 3 closely cooperate with the common good quality. Metro defense