Prefabricated concrete member, assembled concrete member and fabricating method through straight thread and nut locking anchor grouting sleeve connection

Abstract

The invention discloses a prefabricated concrete member, an assembled concrete member and a fabricating method through straight thread and nut locking anchor grouting sleeve connection and belongs to the technical field of assembled concrete structures of constructional engineering. A method of straight thread and nut locking anchor grouting sleeve connection is applied, one end of a reinforcing steel bar is machined to form a straight thread (6), a nut (5) is connected with the other end of the reinforcing steel bar, the inner wall of a small-diameter end of a connecting sleeve is machined to form a screw thread (9) so as to be connected with the reinforcing steel bar through the straight thread (6) to transmit force, the inner wall of a large-diameter end of the connecting sleeve is machined to form a screw thread (16) so as to be connected with a matched blocking ring (10) through an external thread (17), after grouting through a grouting hole (8), the pulling force of the reinforcing steel bar is transmitted through locking anchor extruding and cementation among the reinforcing steel bar nut, the blocking ring, a grouting material and the sleeve, and traditional methods that pulling forces of reinforcing steel bars of prefabricated members through grouting connection are mainly transmitted through cementation are changed. According to the prefabricated concrete member, the assembled concrete member and the fabricating method through straight thread and nut locking anchor grouting sleeve connection, the connection of the novel prefabricated concrete member is improved in terms of safety and economical efficiency.

Description

technical field [0001] The invention relates to a steel bar connection structure applied to assembled concrete prefabricated components, and belongs to the technical field of assembled concrete structures in construction engineering. One end of the steel bar is processed into a straight thread, put on a nut, and the other end is also processed into a straight thread, and the inner wall of one end of the connecting sleeve is processed into a thread, which is connected with the steel bar through a thread, and the other end of the sleeve adopts a screw whose inner diameter is smaller than the outer diameter of the nut at the corresponding end. Blocking ring, lock the nut, and grout through the sleeve, so that the steel bar can be squeezed and bonded by the locking anchor between the nut, the blocking ring, the grouting material and the sleeve, and the prefabricated components of the previous grouting connection have been changed. The tensile force of the steel bars is mainly tran...

AI Technical Summary

Problems solved by technology

The tensile force of the connecting steel bar is transmitted to the grouting material through shearing force, and then to the interface between the grouting material and the surrounding sleeve, bellows or concrete through the shearing force, mainly relying on the bonding force transmission, and the reliability is not high; Relying on bonded force transmission, the length and diameter of the sleeve, bellows or hole will be relatively large, resulting in a large amount of steel and high cost; due to the relatively large volume of the sleeve, bellows or hole, the special grouting material used The amount is also large, and its durability has not been fully verified, and has not withstood the test of actual earthquakes; the gaps usually reserved between vertically connected prefabricated components are small, and there is a problem that the grouting cannot fill the gaps, resulting in The joint surface is easy to crack and damage under the action of horizontal load, and the building will collapse continuously, which will cause serious loss of life and property

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