Detachable sleeve for hole forming during steel bar mortar anchoring inserting and construction method

Abstract

The invention discloses a detachable sleeve for hole forming during steel bar mortar anchoring inserting and a construction method. The sleeve comprises an external sleeve body (1) and an internal core piece (2), the external sleeve body (1) is composed of four arc-shaped pieces (1.1) and is a circular table body with a small upper portion and a large lower portion, a center hole (1.2) of the external sleeve body (1) is provided with an internal conical surface with a large upper portion and a small lower portion, the internal conical surface is provided with an internal thread, a ring-shaped limiting step (1.3) of the external sleeve body (1) is sleeved with a clamp (3), and the ring-shaped surface (1.4) of the external sleeve body (1) is sleeved with a roll rim (4.1); and according to the keys of the method, the four arc-shaped pieces (1.1) are temporarily bundled into the external sleeve body (1), a lower circular table (2.2) of the internal core piece (2) is screwed into the center hole (1.2) of the external sleeve body (1), then external sleeve body (1) is sleeved with the clamp (3) and a seal cover (4), and then the internal core piece (2) is rotated. According to the detachable sleeve for hole forming during steel bar mortar anchoring inserting and the construction method, the anchoring quality can be improved, detaching is convenient, and mortar does not leak.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a detachable sleeve for forming a hole when a steel grout anchor is plugged in and a construction method for forming a hole by using the sleeve. Background technique [0002] Reinforcement anchor insertion is an important way to realize the connection of concrete structures. Reinforcement anchor insertion refers to forming holes in concrete structure A such as concrete columns, and pre-embedding connecting steel bars in concrete structure B, and extending the connecting steel bars out of the concrete structure The part B is inserted into the installation hole of the concrete structure A, and then the installation hole is grouted to make it anchor. The plugging of steel grout anchors requires the use of detachable sleeves to form holes. [0003] The detachable sleeve in the prior art is a straight cylinder, which is made of four circular arc plates, and a cylindrical inner core i...

AI Technical Summary

Problems solved by technology

[0006] However, there are several defects in the detachable sleeve used for forming the hole when the steel grout anchor is plugged in the above prior art and the construction method utilizing the detachable sleeve to form the hole: first, in order to strengthen the bonding and anchoring, the straight sleeve The outer wall of the cylinder is provided with concave and convex ring teeth, but after pouring concrete, the bond between the outer wall of the straight sleeve and the installation hole is too strong, and it is difficult to disassemble; It is still difficult to guarantee the anchoring quality; moreover, since the straight sleeve is assembled by four arc plates, in other words, the four arc plates are cut by a complete straight sleeve, and the joints cut between the arc plates are very small. Difficult to completely seal, there is a hidden danger of slurry leakage

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