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××立交桥是我国第一座桥上行驶飞机,桥下通行汽车的预应力箱型连续梁立交桥(见图1)。桥梁载重按综合机型500吨设计。桥长51.96米,桥宽60米。全桥由10根箱型梁组成,每根箱梁重310吨,分三段预制,中段梁长20.82米,重130吨,边段梁长15.07米,重90吨。分段接缝用环氧树脂胶浆粘结。预应力体系采用7φ12钢绞线,星形钢锚。箱梁预制场按架梁方案设在桥位南侧的拟修建高速公路路基上。每根预制梁的轴线均与桥位每根梁的轴线相互并行(见图2)。
×× Overpass is the first prestressed box-type continuous beam overpass that runs on the first bridge in China and passes under the bridge (see Figure 1). Bridge load by the comprehensive model of 500 tons of design. Bridge length 51.96 meters, 60 meters wide bridge. The bridge consists of 10 box beams with a weight of 310 tons per box girder. It is prefabricated in three sections with a length of 20.82 meters and a weight of 130 tons. The side length is 15.07 meters long and weighs 90 tons. Seam seams are bonded with epoxy glue. Prestressed system using 7φ12 strand, the star steel anchor. Box girder prefabricated by girder scheme located in the south side of the bridge to be built expressway embankment. The axis of each precast beam is parallel to the axis of each beam at the bridge (see Figure 2).