Bridge prefabricated assembly structure and bridge

By introducing L-shaped precast structures and shear key components into the precast beam structure, the problems of insufficient shear key bearing capacity and positioning difficulties were solved, achieving efficient connection and improved durability of the bridge.

CN223576921UActive Publication Date: 2025-11-21HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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Patent Information

Application Number
CN202423193970.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-11-21
Estimated Expiration
2034-12-24

AI Technical Summary

Technical Problem

Existing precast beam structures suffer from insufficient shear key bearing capacity and difficulty in positioning during connection, making it difficult to guarantee overall performance. This leads to problems such as stress concentration and concrete cracking, affecting the safety and durability of bridges.

Method used

The structure employs an L-shaped prefabricated structure and shear key components, including a top plate, web plate, bottom plate, and transverse positioning shear keys. Combined with pre-embedded ducts in the prefabricated sections, the connection is achieved through steel strands, enhancing the load-bearing performance and positioning effect.

Benefits of technology

It improves the stress performance of the connection parts, enhances the overall load-bearing capacity of the precast beams, improves construction accuracy and efficiency, avoids cracking of the connection surface, and extends the service life of the bridge.

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Abstract

The bridge prefabricated assembly structure comprises an L-shaped prefabricated structure and a shear convex key assembly, the L-shaped prefabricated structure comprises a prefabricated horizontal section and a prefabricated vertical section, the prefabricated vertical section is arranged at the end, away from an existing bridge, of the prefabricated horizontal section, and the shear convex key assembly is arranged at the end, away from the existing bridge, of the prefabricated horizontal section. The shearing force convex key assembly comprises a plurality of top plate shearing force convex keys, web plate shearing force convex keys, bottom plate shearing force convex keys and transverse positioning shearing force convex keys. The prefabricated horizontal section and the prefabricated vertical section are each provided with a prefabricated section embedded hole channel allowing a steel beam to penetrate through. In this way, the stress performance of the L-shaped prefabricated structure after assembly and connection is improved by arranging the shear keys in different areas, and meanwhile, the pre-positioning capacity of the structure during assembly and connection can be enhanced through the transverse positioning shear convex keys, so that the construction efficiency and accuracy are improved; and by combining the steel beam prestress penetrating through the pre-buried hole channel of the prefabricated section, the structure connecting quality and the overall performance of the assembled structure can be improved, the concrete cracking risk is reduced, and the service life of the structure is prolonged.
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