西宁市文汇路跨湟水河大桥混凝土自锚式悬索桥设计

Design of Concrete Self-Anchored Suspension Bridge of Huangshui River Bridge on Wenhui Road in Xining City

西宁市文汇路跨湟水河大桥为(24+65+158+65+24)m双塔五跨连续混凝土梁自锚式悬索桥,综述该桥设计与计算。该桥采用纵向半漂浮体系,设置纵向阻尼器控制梁端位移;主梁采用单箱三室混凝土截面,梁高2.2 m;桥塔采用门形框架混凝土结构,塔顶横梁采用矩形空心截面并设置预应力钢绞线;桥塔墩下部采用分离式承台,单个承台布置6根直径2.2 m钻孔灌注桩;主缆采用φ5.25 mm镀锌高强平行钢丝,吊索采用φ7.0 mm镀锌高强平行钢丝。计算分析结果表明该桥的各项检算均满足规范要求。

The Huangshui River Bridge on Wenhui Road in Xining City is a double-pylon 5-span(24+65+158+65+24)-m continuous concrete self-anchored suspension bridge.The article summarizes the design and calculation of this bridge.The semi-floating system is used for this bridge with the longitudinal dampers to control the displacement at the end of the girder.The single-box three-cell concrete section is used for the main girder.The height of the girder is 2.2 m.The bridge pylon is a concrete portal frame structure.The cross beam at the top of the pylons is a rectangular hollow section in which the pre-stressing steel strands are used.The separated base slab is used at the lower of pylon pier.Each base slab is supported by 6 bored cast-in-place piles with 2.2-m diameter.The main cables are respectively made up of φ5.25mm galvanized high strength parallel steel wires.The suspension cables are of φ7.0mm galvanized high strength parallel steel wires.The results of the calculation and analysis indicate that all checking calculations of this bridge can satisfy the relevant requirements in the codes.