Extruded semi-grouting reinforced sleeve with built-in casing, connective structure, and construction method

Abstract

Disclosed are an extruded semi-grouting reinforced sleeve with a built-in casing, a connective structure, and a construction method. The sleeve is a hot-rolled seamless steel tube. The wall of the sleeve is provided with a grout inlet and a grout outlet. The sleeve is provided with circular inner projections. One end of the sleeve is an extruded end, and the rest is a grout-anchoring end. The built-in casing is arranged inside the extruded end. The inner diameter of the built-in casing is equal to the outer diameter of a rebar to be connected, and less than the inner diameter of the grout-anchoring end. All of the grout inlet, the grout outlet and the circular inner projections are located at the grout-anchoring end. By the use of the built-in casing, the deformation of the extruded end is lessened to avoid the extruded end being damaged during crimping; the sleeve is widely applicable to the rebar connection of prefabricated concrete columns in multi-storey and high-rise prefabricated assembled concrete frame structures, shear wall structures or frame shear wall structures, as well as the connection of horizontal rebars in prefabricated concrete beams, the connection of rebars in prefabricated concrete shear walls and the connection of rebars in existing reinforcement projects.

Description

technical field [0001] The invention relates to a half-grouting sleeve, its connecting structure and construction method. Background technique [0002] At present, the half-grouted reinforcement sleeve connections widely used in the field of prefabricated concrete structures are generally made by casting or metal steel bar cutting process, and this mode has the following disadvantages: [0003] 1. Most of the non-grouting connection ends of the existing half-grouting reinforcement sleeves are threaded. This type of connection requires matching threads on the end of the connected reinforcement and the sleeve, which requires high processing accuracy and low processing efficiency. A more accurate pre-tightening force is required during the connection, the construction quality is not easy to guarantee, and the construction cost is high. [0004] 2. The non-grouting connection end of the existing semi-grouting reinforcement sleeve is connected by a cold-extruded sleeve. Due to t...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an extruded semi-grouting steel bar sleeve with an inner sleeve, a connection structure and a construction method, to solve the technical problems of low processing efficiency and complicated process of the existing grouting sleeve; question of reliability

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