Heavy steel structure truss high-altitude bulk construction method

Abstract

This invention discloses a method for high-altitude assembly of heavy steel trusses, relating to the field of steel structure construction technology. The method includes the following steps: S1, Pre-construction preparation: Using finite element software to simulate the entire construction process, determining a reasonable construction sequence, theoretical values ​​of component internal forces and deflection, generating a construction simulation analysis report, and conducting detailed design of the steel truss components, numbering them according to the hoisting sequence; S2, Ground segmental assembly: Dividing the overall truss into reasonable segments, erecting temporary support frames for component assembly; S3, Segmented high-altitude assembly construction, etc. This invention reduces the amount of high-altitude work by adopting "ground segmental assembly + segmented high-altitude assembly + staggered ladder construction," solving the construction limitations of traditional overall hoisting in confined spaces. Large-span steel beams achieve displacement deviations ≤5mm through "uneven span segmented sliding in mid-air," improving synchronous control accuracy and enhancing the level and quality of bridge sliding construction.

Images