Grouting sleeve and prefabricated piece

Abstract

The invention belongs to the field of constructional engineering, and particularly discloses a grouting sleeve and a prefabricated piece. The grouting sleeve comprises a sleeve body, wherein a grouting opening and an air outlet are formed in the sleeve body; an opening is formed in one end of the sleeve body; the other end of the sleeve body adopts a connecting end; steel flaps are arranged on the inner wall of the sleeve body; the thicknesses of the steel flaps are gradually increased from the opening end to the interior. The arrangement of the steel flaps improves the integral rigidity of the sleeve body, the wall thickness of the sleeve body can be properly reduced on the premise of ensuring rigidity, and materials are saved. Meanwhile the wall thickness is reduced in the condition of the same external diameter, grouting materials are increased, slurry is more compacted, and the overall bonding property between a rebar and the sleeve body is better. In addition, grouted slurry forms a locking structure matched with the inner space of the sleeve body and the steel flaps in the sleeve body, and the anchoring reliability of the rebar is greatly improved; the grouting sleeve can realize the accurate axial control and radial positioning of the rebar, and guarantees the positioning accuracy between the rebar and the grouting sleeve.

Description

technical field [0001] The invention belongs to the field of construction engineering, in particular to a grouting sleeve and a prefabricated part. Background technique [0002] In the traditional cast-in-place concrete structure, the steel bars are often connected by mechanical connection methods such as lap joints, welded joints or extrusion sleeves. The construction of the steel bar connection is relatively complicated, and the steel bar connection must be completed before pouring the concrete, which cannot The connection of steel bars between prefabricated parts makes it impossible to carry out prefabricated construction. [0003] In the prior art, the steel bar connection between the prefabricated concrete building parts needs to be connected by sleeve grouting. The two connected steel bars are inserted into the metal sleeve and high-performance cement mortar is poured into the gap between the sleeve and the steel bar. After the cement mortar is hardened, the three are...

AI Technical Summary

Problems solved by technology

However, the setting of the tapered tube in the above-mentioned grouting sleeve makes the inner diameter of this part suddenly smaller. Because the steel bar has a certain rigidity, it is difficult to make the steel bar to be connected on the same straight line, and it is even impossible to extend the steel bar to the end of the sleeve. Inside, there is a defect in the force

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