开敞式钢桁梁桥在桥梁改扩建工程中的应用

Application of Open Steel Truss Bridge in Reconstruction and Expansion Project

改建桥梁位于苏州吴中区中心城区,老桥跨越京杭大运河,车道规模为双向2车道,桥上交通严重拥堵,桥下通航净空不足,亟待改建。新建桥梁主桥跨径布置为39.5 m+88m+39.5 m,结构为开敞式钢桁梁桥,主桥结构方案新颖,景观造型优美。主要就主桥的桥梁选型、总体布置,主体结构等方面的设计和施工方案进行介绍,促进新型钢桁梁结构在城市桥梁建设中的应用。

The rebuilt bridge is located in the central urban area of Wuzhong District,Suzhou.The old bridge crossed the Beiing-Hangzhou canal with two lanes.The traffie on the bridge was seriously congested,and the navigation clearance under the bridge was insufficient,which needed to be recon-structed.The main spans of the new bridge are 39.5m+88m+39.5m,and the structure is an open steel truss girder bridge.The main bridge has novel structural scheme and beautiful landscape shape.This paper mainly introduced the design of the main bridge type selection,general layout,main structure and construction scheme,so as to promote the application of the new steel truss beam structure in the urban bridge constructions.