Double-layer reinforcement cage with positioning function

By combining a double-layer steel cage structure with an epoxy resin coating, the problem of insufficient tensile, bending, and shear resistance of traditional single-layer steel cages under heavy loads is solved, thereby improving the load-bearing capacity and seismic performance of concrete structures and preventing positional displacement and deformation.

CN224078141UActive Publication Date: 2026-04-03LIANYUNGANG PORT ENG DESIGN & RES INST CO LTD
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Patent Information

Application Number
CN202520500226.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-20
Publication Date
2026-04-03
Estimated Expiration
2035-03-20

AI Technical Summary

Technical Problem

Traditional single-layer steel cages are insufficient in tensile, bending, and shear resistance when subjected to large loads, which makes concrete structures prone to diagonal cracks and limits the load-bearing capacity and shear performance of the structure.

Method used

The structure employs a double-layer steel cage structure, including an outer ring of stirrups and an inner ring of stirrups. A three-dimensional spatial truss is formed by welding reinforcing bars. Combined with top, bottom, and inner and outer ring positioning bars, the structure's stability and impact resistance are enhanced. An epoxy resin coating is applied to the surface of the steel bars to improve corrosion resistance.

Benefits of technology

It improves the tensile, bending and shear strength of concrete structures, enhances the load-bearing capacity and seismic performance of structures, prevents positional displacement and deformation, ensures the quality of pile foundations, delays crack development and improves durability.

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Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a double-layer reinforcement cage with a positioning function, which comprises a framework steel bar, and a reinforcing mechanism is welded on the side wall of the framework steel bar. The outer-ring stirrups and the inner-ring stirrups can enhance the punching resistance of the pile top and restrain the core concrete to improve the bearing capacity of a pile body, the double-layer stirrups act synergistically to resist water and soil pressure, local loads can be evenly dispersed to an overall framework, the anti-seismic and anti-impact capacity is improved, meanwhile, the core concrete is restrained by the inner ring, and the outer-layer concrete is restrained by the outer ring; the gradient constraint effect is formed, crack development is delayed, ductility is improved, the top fixing ribs can make the structure of the reinforcement cage more stable, and meanwhile a platform can be provided for follow-up equipment installation.
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