A prefabricated laminated slab connecting joint structure

By combining reverse threaded double-ended bolts and U-shaped stirrups with L-shaped support steel plates and inverted V-shaped reinforcing bars, the loosening problem of precast composite slab connection nodes under vibration and temperature changes was solved, improving the rigidity and stability of the nodes and reducing maintenance difficulty and fatigue failure risk.

CN224412912UActive Publication Date: 2026-06-26HAILI GREEN BUILDING TECHNOLOGY (WANNING) CO LTD
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Patent Information

Application Number
CN202521594110.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-29
Publication Date
2026-06-26
Estimated Expiration
2035-07-29

AI Technical Summary

Technical Problem

Existing precast composite slab connection node structures are prone to loosening under vibration or temperature changes, and the steel wire bindings and ordinary bolts are easily worn, making maintenance difficult and prone to causing concrete splitting.

Method used

The double-ended bolts with reverse threads and U-shaped stirrups work together to achieve a self-locking effect through the reverse rotation of the left-hand and right-hand nuts. Combined with L-shaped support steel plates and inverted V-shaped steel bars, the rigidity and stability of the joint are enhanced.

Benefits of technology

It effectively prevents vibration-induced loosening, reduces thread wear, improves the load-bearing capacity, seismic performance, and overall stability of the joint, reduces the risk of fatigue failure, and is simple to operate and easy to maintain.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to prefabricated building technical field, and disclose a kind of prefabricated composite board connecting joint structure, including multiple U hoop embedded in prefabricated composite board, by the cooperation of sliding hole, stud bolt, left-handed nut and right-handed nut, when installing, after two prefabricated composite boards are in position, the middle section of stud bolt is inserted into sliding hole, then left-handed nut and right-handed nut are respectively screwed to the threaded end corresponding to stud bolt, then clockwise turn right-handed nut, anticlockwise turn left-handed nut, make two and tighten along axial direction, reverse rotation can loosen, it can prevent loosening caused by vibration using self-locking effect, middle section of light pole can disperse stress, reduce thread wear, and only need to disassemble one end nut to be able to replace or maintain accessory, can improve the integrity of main thread, the structure is simple, convenient to operate, and practicality is strong.
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