A two-way jacking process applied to large-tonnage long-distance steel box girders

Abstract

The invention discloses a two-way pushing process applied to large-tonnage long-distance steel box girders. and the lifting beam mechanism; step 2, using the corresponding lifting beam mechanism and the assembled platform to push the two middle header beams towards the direction close to the center of the bridge until the two are closed; adjust and use the assembled platform and the assembled platform The beam lifting mechanism is used to push the steel box girder of the approach bridge along the direction away from the center of the bridge until the adjacent intermediate box girder and the steel box girder of the approach bridge are separated by a preset distance to form a space, and the steel box girder is hoisted To the vacant position and assemble, realize full-line closing at this moment. The construction technology of the present invention adopts a construction method of pushing and closing at one time, reducing segmentation and assembly positions, which can improve construction quality and work efficiency, and reduce investment in temporary structures on site.

Description

technical field [0001] The invention relates to the technical field of two-way jacking of steel box girders. More specifically, the present invention relates to a two-way jacking process applied to large-tonnage long-distance steel box girders. Background technique [0002] In bridge construction, the steel box girder jacking process is widely used when crossing obstacles or constructing long distances. However, due to the different design of the jacking bridge structure, there are certain requirements for the layout of the temporary structure of the jacking equipment, the process and the overall stress safety for the steel box girder jacking of multi-connected, multi-segment and different cross-section types, so as to meet the safety requirements. construction requirements. [0003] The traditional steel box girder jacking construction technology is often limited to pushing from one side to the other side of the steel box girder of the same section, or pushing from both s...

AI Technical Summary

Problems solved by technology

[0003] The traditional steel box girder jacking construction technology is often limited to pushing from one side to the other side of the steel box girder of the same section, or pushing from both sides to the middle. If the section changes or the expansion joint at the branch joint is broken, Sectional jacking is often used, which increases the difficulty of steel box girder assembly work surface and quality control, and also increases the investment in jacking temporary structures and equipment

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