Abstract: Hening high speed railway super major bridge is a flexible arch bridge with steel truss beam．It has three spans (1 14．75+229．5+1 14．75)m，the main span is the longest in the same style bridge in China．Structure construction，con- ponent design and steel gieder installation method of the main bridge are introduced

Key words: flexible arch bridge with steel truss, structure design, steel truss beam

摘要： 合肥铁路枢纽南环线跨合宁高速特大桥是一座铁路上跨高速公路的特大桥，该桥采用(114．75+229．5+ 114．75)m柔性拱刚性梁，主跨跨度在国内同类型桥梁中居于首位。介绍了该桥的总体设计、结构构造及总体施工 方法。

关键词: 柔性拱刚性梁, 结构设计, 钢桁梁