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钢筋混凝土桥梁的桥面铺装的防水设施,对延长桥梁使用年限起着重大作用,早已引起国内外技术工作者的重视。但是,国内外很多标准图、设计图却仍然规定带有防水层的多层桥面铺装结构来防止渗水。其实,这种结构设计,施工时工序繁复、工期长、投资多、防水层均赖人工操作等等,预期效果很不易达到。因此,我们于1962年、1963年在新建北京市近郊两座装配式钢筋混凝土桥梁中(跨径均为10米+20米+10米三孔,桥面行车道宽分别为14～18米),经市政工程局批准,对原设计的带有防水层的多层桥面铺装结构(见图一)改变为双层式沥青混凝土桥面铺装
Reinforced concrete bridge deck pavement waterproofing facilities, to extend the useful life of the bridge plays a significant role, has drawn the attention of domestic and foreign technical workers. However, many standard drawings and design drawings at home and abroad still stipulate a multi-layer bridge deck structure with a waterproof layer to prevent water seepage. In fact, this structure design, construction process complicated, long duration, more investment, waterproof layer depends on manual operation, etc., the expected effect is not easy to achieve. Therefore, in 1962 and 1963, we built two prefabricated reinforced concrete bridges in the outskirts of Beijing (three meters in diameter of 10 meters +20 meters +10 meters and the widths of the bridge deck lanes of 14-18 meters respectively) , Approved by the Municipal Engineering Bureau, the original design of the multi-deck deck with waterproof layer structure (see Figure 1) changed to double-decker asphalt concrete deck pavement