四平市东丰路跨铁路立交主桥设计

Design of Main Bridge of Dongfeng Road Cross-railway Interchange in Siping City

四平市东丰路跨铁路立交桥主桥结构形式采用独塔单索面混合梁斜拉桥,跨径布置为90 m+169 m。斜拉桥采用转体施工,设计转体总重量2.55万t。该桥目前为国内转体跨径最大的斜拉桥,同时也是首座转体施工的混合梁斜拉桥,结构构造及受力复杂,设计技术难度大,采用了一系新技术、新工艺。该桥的设计研究对于跨越铁路的大跨度桥梁建设和设计提供了新思路,可供相关专业人员参考。

The main bridge structure of Dongfeng Road Cross-railway Interchange in Siping City is a single-pylon single-plane composite girder cable-stayed bridge.Its span arrangement is 90m+169m.The cable-stayed bridge adopts the rotation construction.Its total weight of.design rotation is 25500t.This bridge is currently the longes.t span cable-stayed bridge by the rotation construction and is the first composite girder cable-stayed bridge by the rotation construction in China.The structure and stress are complex.The design technology is more difficult.A series of new technique and technology are used.The design study of this bridge on the construction and design of long-span bridge crossing the railway,provides the new thought, which can be referred for the similar projects.