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项目概况某特大桥为195m+438m+195m双塔预应力混凝土斜拉桥,主桥平面均位于直线段,纵坡为±0.6%,中跨设R=50000m凸曲线,主梁断面为∏形梁,桥面宽度24.1m,梁高2.7 m,主梁顶板厚0.32m,设双向2%横坡。主梁边肋内设有预应力钢绞线,顶板设有Φ32精扎螺纹预应力钢筋。主梁横梁的基本间距是7.8m、6.5m、5.5m,横梁间距与斜拉索相对应,横梁均设有预应力钢绞线。除辅助墩附近横梁厚度为0.45m外,其余横梁厚度均按0.35~0.3m变化。
Project Overview The special bridge is a 195m + 438m + 195m double-tower prestressed concrete cable-stayed bridge with the main bridges on the straight line with a longitudinal slope of ± 0.6% and a mid-span R = 50000m convex curve. The main girder section is Π-shaped Beam, deck width of 24.1m, beam height of 2.7 m, the main beam roof thickness 0.32m, set up two-way 2% side slope. Prestressed steel strands are provided in the side ribs of the main girder, and the top plate is provided with Φ32 fine-thread pre-stressed steel bars. The basic spacing of girder beams is 7.8m, 6.5m, 5.5m, the beam spacing corresponds to the stay cables, and the beams are equipped with prestressed steel strands. In addition to the auxiliary pier near the beam thickness of 0.45m, the remaining beam thickness by 0.35 ~ 0.3m change.