安九铁路特殊结构桥梁设计

Design of Special Bridge Structures on Anqing-Jiujiang High-Speed Railway

时速350 km的安九铁路沿线控制点较多,采用了连续梁、拱桥、斜拉桥和钢-混组合桁架梁等多种特殊结构。本文着重对安九铁路较具代表性的(80+136+80)m连续梁、1-80 m四线系杆拱、(2×50+224+672+174+3×50)m斜拉桥和1-96 m钢-混组合桁架梁四种特殊结构从方案选择、结构设计和设计特点等方面进行了详细论述。无砟轨道大跨度连续梁、双拱肋四线系杆拱、交叉索四线钢箱梁斜拉桥和低高度钢-混组合桁架梁等结构在安九铁路的成功应用,丰富了高速铁路桥梁结构类型,并为该类型桥梁结构在高速铁路上的推广应用提供了宝贵的设计经验。

There are many control points along the Anqing-Jiujiang High-speed Railway with a speed of 350 km/h.A variety of special structures such as continuous beam,arch bridge,cable-stayed bridge and steel-concrete composite truss beam are adopted.This paper focuses on the four special structures of representative(80+136+80)m continuous beam,1-80 m four-line tied arch,(2×50+224+672+174+3×50)m cable-stayed bridge and 1-96 m steel-concrete composite truss beam,and gives a detailed discussion from the aspects of scheme selection,structural design and design characteristics.The successful application of ballastless track long-span continuous beam,double arch rib four-line tied arch,cross cable four-line steel box girder cable-stayed bridge and low height steel-concrete composite truss beam in Anqing-Jiujiang High-speed Railway enriches the structural types of high-speed railway bridges,and provides valuable design experience for the popularization and application of this type of bridge structure in high-speed railway.