大跨度铁路桥梁桥型方案构思与设计

Conception and Design of Proposed Bridge Types for Long-Span Railway Bridge

介绍了京沪高速铁路南京长江大桥2 个桥位的桥型方案,分析研究了钢桁架-箱梁组合加劲梁斜拉桥、连续钢桁拱-桁梁组合桥梁对大跨度铁路桥梁的适应性。2 个桥位的桥型方案兼顾通航对主、辅通航孔的不同要求,分别采取的钢桁架-箱梁组合加劲梁斜拉桥与连续钢桁拱-桁梁组合桥梁,静动力性能好,满足列车高速运行要求,是大跨度铁路桥梁合理的结构形式。

This paper presents the proposed bridge types for the two planned bridge sites of Nanjing Changjiang River Bridge on Beijing-Shanghai High-Speed Railway, and analytically studies the applicability of the bridge types like the composite steel truss and box girder cable-stayed bridge, and the composite continuous steel truss arch and truss girder bridge to long-span railway bridge. Both the bridge types proposed for the two bridge sites take account of different requirements for navigation under the main and secondary navigable spans, and the bridge types to be respectively adopted at the different bridge sites have good static and dynamic behavior, can meet the requirements for high-speed train operation and are reasonable structure types for the long-span railway bridge.