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1.工程概况 某高速公路沿线中小桥梁较多,桥梁的结构形式均采用交通部通用标准图集的预应力箱型钢筋混凝土空心简支板,空心板长16～20m,板宽1.25m(边板宽1.74m),板高0.75～0.9m,板端支承在桥墩或桥台顶部的系梁上,每块板设4个园型聚四氟乙烯橡胶板(下简称四氟板)支座,桥面空心板间用钢筋焊连后灌注混凝土形成铰接,每10块板铰成半幅,半幅桥宽13.5m,行车分隔带宽1m,全桥宽28m。
1. Engineering Overview There are more medium and small bridges along a highway. The structural forms of the bridges are all prefabricated reinforced concrete hollow simple support plates of the Ministry of Communications General Atlas, the hollow slab is 16 ~ 20m in length and 1.25m in width Plate width 1.74m), the plate height of 0.75 ~ 0.9m, board-side support at the top of the piers or bridge abutments beam, each plate is set 4 Park Teflon rubber (hereinafter referred to as PTFE plate) support , The bridge between the hollow plate welded with steel after the formation of perfusion concrete hinge, each 10 panels hinged half-width, half bridge width 13.5m, traffic separation bandwidth 1m, full bridge width 28m.