Key Construction Technologies for Integral Lifting of Large-Span Steel Truss Arch Bridge
The Qingshuiping Wujiang Bridge is a submerged steel truss girder flexible arch bridge with a main span of 240 me-ters,characterized by its large-span arch rib structure,substantial self-weight,and complex construction processes.The main arch rib adopts a construction scheme that involves"in-situ assembly at both ends and horizontal assembly of intermediate sec-tions followed by integral lifting".During the integral lifting process,horizontal cables are installed to control the forces and de-formations of the main arch ribs.Multi-stage lifting and horizontal tensioning methods are adopted based on the actual force re-quirements at different construction stages.This paper specifically details the arrangement of the assembly brackets and the structural design of the lifting brackets.Finite Element Analysis(FEA)software is utilized for simulation to ensure the safety of the overall structural forces and wind stability.Additionally,computer-controlled hydraulic synchronous lifting technology is implemented during construction to efficiently,economically,and smoothly complete the erection of the main arch ribs.
steel truss-archflexible archmain arch ribintegral liftingassembly bracketfinite element analysisoverturning resistance
万方数据
维普
