EVA卷材在浅埋暗挖PBA工法地铁车站中的铺设工艺

Paving Technology of EVA Membrane in Subway Stations of Shallow-buried and Underground Excavation PBA Method

北京地铁3号线某换乘车站采用暗挖PBA工法逆筑施工,车站主体结构采用防水混凝土进行结构自防水,外包EVA防水板柔性防水层,并对阴阳角、甩槎接槎、施工缝等细部节点部位进行了防水处理,刚柔结合、细部节点保障的施工方案确保了防水效果。

Underground excavation PBA construction method is adopted for reverse construction of some transfer station of Beijing Subway Line 3.The main structure of the station employs waterproofing concrete for structural self-waterproofing,wrapped with flexible waterproofing layer of EVA waterproofing board.Waterproofing treatment is carried out on the details such as internal and external corners,reserved connecting sections,construction joints etc.This combined construction plan of rigid and flexible ensures the waterproofing effect of the project.