A precast concrete bridge deck slab wet joint structure

By introducing trapezoidal shear keyways, three-dimensional truss reinforcement components, ultra-high performance concrete, and slow-release microcapsule curing agents into the wet joint structure of precast concrete bridge decks, the problems of insufficient shear capacity and lack of self-repair in traditional bridge deck wet joint structures have been solved. This has achieved efficient load transfer, improved shear bearing capacity, and enhanced durability, thus promoting the development of precast bridge assembly.

CN224378685UActive Publication Date: 2026-06-19HUAIBEI SETI TRADING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUAIBEI SETI TRADING CO LTD
Filing Date
2025-06-30
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Traditional precast concrete bridge deck wet joint structures suffer from problems such as insufficient shear resistance, low interfacial friction, easy shear slippage, low reinforcement force transmission efficiency, easy cracking at the joint, lack of self-healing ability, and high maintenance costs. In addition, their lack of construction convenience and positioning accuracy limits the development of precast and assembled bridges.

⚗Method used

By employing trapezoidal cross-section shear keyways, three-dimensional truss structure force-transmitting steel reinforcement components, ultra-high performance fiber-reinforced concrete, slow-release microcapsule curing agent, and locking mechanism, the shear bearing capacity, stiffness, and durability of the joints are improved through mechanical interlocking, three-dimensional force transmission, material optimization, and self-healing mechanisms, achieving rapid and precise connection.

🎯Benefits of technology

It significantly improves the shear bearing capacity and overall stiffness of bridge deck joints, achieves efficient load transfer and distribution, inhibits crack propagation, reduces maintenance costs, improves construction convenience and connection reliability, and enhances the durability and service life of the bridge.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a wet joint structure for precast concrete bridge decks, specifically relating to the field of building engineering technology. This utility model incorporates components such as shear keyways, locking mechanisms, and force-transferring steel reinforcement assemblies. Through the cross-sectional matching relationship between the shear keyways and the longitudinal beams in the locking mechanism, and the truss-like connection between the diagonal web reinforcement and the upper and lower layers of steel mesh, the shear keyways increase interfacial friction through their trapezoidal cross-section and inclined groove walls. The locking mechanism locks adjacent bridge decks through the engagement of plug-in locks and limiting side plates. The force-transferring steel reinforcement assemblies form a spatial force-bearing system through a three-dimensional truss structure. This achieves the effect of efficiently transmitting and distributing shear force and bending moment at bridge joints through the synergistic effect of mechanical interlocking, rigid connection, and three-dimensional force transmission, significantly improving the shear bearing capacity and overall stiffness of the joint.
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