A self-anchoring structure and method for integral lifting of a steel box girder

CN117587713BActive Publication Date: 2026-06-26WUHAN YIYE STEEL STRUCTURE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN YIYE STEEL STRUCTURE
Filing Date
2023-12-15
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

When the steel box girder is lifted as a whole in water with limited space, the stress is concentrated at the lifting point, and it is impossible to set up a separate support, which makes the installation difficult and may affect the navigation of the river and the integrity of the slope protection.

Method used

The structure adopts a self-anchoring structure, including a ring-shaped self-anchoring support, a self-anchoring truss, and lifting equipment. The ring-shaped self-anchoring support is connected to the adjacent constructed steel box girder to form an integral support, avoiding direct connection between the lifting point and the bridge tower. Anchor bolts and angle steel are used for fixing to ensure the integrity of the steel box girder.

Benefits of technology

This achieved an economical and reasonable lifting of the steel box girder, ensuring river navigation and the integrity of the riverbank protection, avoiding the influence of bending moment at the lifting point, preserving the integrity of the steel box girder, and avoiding the problem of subsequent hole filling.

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Abstract

The application discloses a self-anchoring structure for integral lifting of a steel box girder, comprising a bridge tower and a constructed steel box girder, wherein the bridge tower is provided with a ring-shaped self-anchoring support body, the bottom of the bridge tower is provided with a support bottom embedded steel plate, the ring-shaped self-anchoring support body is connected with the support bottom embedded steel plate and the constructed steel box girder, the top of the constructed steel box girder is provided with a self-anchoring truss, and the end of the self-anchoring truss towards a mounting surface is provided with lifting equipment. The application further discloses a self-anchoring method for integral lifting of a steel box girder, and the steps are as follows: 1, fixing the support bottom embedded steel plate at the bottom of the bridge tower; 2, installing the ring-shaped self-anchoring support body; 3, hoisting the prefabricated steel box girder in situ, and welding adjacent prefabricated steel box girders to make them into the constructed steel box girder; 4, installing the steel box girder inner support circular pipe and the self-anchoring truss on the constructed steel box girder; and 5, installing the steel box girder to be hoisted. The application can economically and rationally lift the steel box girder to a specified position, and can be widely applied in the field of building construction steel structure installation.
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