A lifting structure for a long-span steel box girder

CN224337145UActive Publication Date: 2026-06-09CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD
Filing Date
2025-05-19
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The existing technology for bridge construction with large-span steel box girders has low construction efficiency. The construction efficiency is insufficient because the steel box girder segments are lifted and assembled by a bridge deck crane and closed from the abutments on both sides of the river to the mid-span.

Method used

The system employs components such as bridge abutments, main longitudinal steel beams, continuous jacks, and segmental lifting jacks. Steel strands connect the steel-concrete composite section and the steel box girder segments. Continuous jacks and segmental lifting jacks are used for lifting, and the steel strands evenly distribute the gravity, enabling direct lifting of the steel box girder segments and reducing the number of hoisting equipment.

Benefits of technology

It improves the construction efficiency of long-span steel box girders, reduces construction difficulty, effectively lifts heavy steel box girders, and the lifting process is stable and highly practical.

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Abstract

The utility model relates to the technical field of steel box girder hoisting, specifically a lifting structure for large-span steel box girder, comprising: an abutment, the abutment is located on both sides of a river, a steel structure main longitudinal beam, the steel structure main longitudinal beam is arranged at the top of the abutment, the setting of sectional lifting jack, sectional lifting jack is connected with steel box girder segment through steel box girder steel strand, and the steel box girder segment is composed of multiple steel box girder small segments, and the assembling work is carried out on a flat barge, the steel box girder steel strand is fixed at the top four corners of the steel box girder segment, so that the gravity of the steel box girder segment is evenly dispersed, and then the sectional lifting jack lifts the steel box girder segment, so that the whole steel box girder segment can be directly lifted, the number of hoisting equipment is reduced, the construction difficulty is reduced, the bridge construction efficiency is improved, and the steel box girder of large weight and large span can be lifted, and the utility model has high practicability.
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