三官堂大桥主桥设计要点

摘要:

三官堂大桥主桥为(160+465+160)m连续钢桁梁桥。主桁为两片带竖腹杆和斜杆的“N”形桁,上、下弦杆及腹杆均采用箱型截面,在上弦杆平面内设置菱形上平联,采用正交异性钢桥面板,板桁结合,基础采用钻孔灌注桩。采用中跨节段悬臂拼装、边跨散拼的施工方案。本桥的设计对同类型桥梁的设计具有重要的理论意义和工程实用价值。

Abstract:

The main bridge of Sanguantang bridge is designed as a steel truss bridge with a span arrangement of 160+465+160 m. The main truss of the bridge is the N-shape web member system with vertical and diagonal members. Box sections are used in upper and lower chords. In the plane of the upper chords, the diamond-shaped top lateral bracing are arranged and the bridge deck is the steel orthotropic deck, which is the plate-truss composite structural. The type of the bridge foundation is bored pile. The steel truss is constructed by the cantilever assembly of mid span truss segment and scattered assembly of side span truss segment. The design results of design have great theoretical and practical values for the design of similar type bridge．