Steel box girder and concrete pier column consolidation structure

By employing a socket-type structure and high-strength concrete connection between the steel box girder and the concrete pier, the problem of welding quality control in the consolidation of the steel box girder and the concrete pier was solved, and the uniformity of stress and durability were improved, making it suitable for bridge construction in complex environments.

CN224314055UActive Publication Date: 2026-06-02CHINA HIGHWAY ENG CONSULTING GRP CO LTD
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Patent Information

Application Number
CN202521488888.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-16
Publication Date
2026-06-02
Estimated Expiration
2035-07-16

AI Technical Summary

Technical Problem

Existing technologies for consolidating steel box girders with concrete piers require on-site welding, which leads to stress concentration at the weld joints, uneven stress distribution on the steel box girders, difficulty in accurate calculations, and insufficient ease of construction and durability.

Method used

The structure adopts a socket-type design, which combines the pre-reserved slot at the bottom of the steel box girder with the top slope of the concrete pier column. Shear studs and high-strength concrete with joint filling are used for connection. The elevation of the steel box girder is adjusted by jacking brackets and jacks, which reduces on-site welding and improves the uniformity of stress and construction accuracy.

Benefits of technology

It simplifies the construction process, reduces stress concentration, improves the reliability and durability of the structure, reduces the difficulty of on-site welding quality control, reduces labor and equipment costs, and is suitable for complex environments.

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Abstract

The utility model relates to the technical field of bridge engineering, and discloses a steel box girder and concrete pier column consolidation structure which comprises a steel box girder, a concrete pier column, shear nails and an adjusting piece used for adjusting the installation elevation of the steel box girder. The bottom of the steel box girder is provided with a notch used for being in socket connection with the top of the concrete pier column, the outer circumferential wall of the top of the concrete pier column is provided with a slope facilitating insertion, and the top of the concrete pier column is located in the notch in an inserted mode. The jacking bracket is connected with a reserved embedded steel bar located on the outer wall of the lower portion of the concrete pier column through a bolt, the jack is installed on the top of the jacking bracket, and the top of the jack abuts against the bottom of the steel box girder. The structure is simple, the factory prefabrication precision is high, the socket-and-spigot design is direct in force transmission, small in stress concentration, accurate in elevation adjustment of the joint pieces, convenient and fast to construct, and suitable for complex environments and large-span bridges.
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