Precast concrete member connected by straight thread and pier head lock anchor grouting sleeve, and method for assembling same

Abstract

The invention relates to a precast concrete member connected by a straight thread and a pier head lock anchor grouting sleeve, and a method for assembling the precast concrete member, belonging to the technical field of constructional engineering assembly concrete structures. The method of connecting by the straight thread and the pier head lock anchor grouting sleeve is adopted; one end of a reinforcing steel bar is processed into the straight thread (6), and the other end of the reinforcing steel bar is processed into a pier head (5); the inner wall of the end with smaller diameter of a connecting sleeve is processed into a thread (9) which is connected with the reinforcing steel by the straight thread (6) and is used for transmitting force; the inner wall of the end with larger diameter of the connecting sleeve is processed into a thread (16) which is connected with a matched plug ring (10) by an external thread (17); after grouting is carried out through a grouting hole, the original way that the tensile force of the reinforcing steel bar of a prefabricated part connected by grouting is transmitted mainly by bonding is changed by the reinforcing steel bar through lock anchor extrusion and bonding force transmission among the pier head of the reinforcing steel bar, the plug ring, grouting material and the sleeve. The safety and economical efficiency of the connection of the novel precast concrete member are improved.

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, and the other end is thicker: the inner wall of one end of the connecting sleeve is processed into a thread, and the steel bar is connected through the thread, and the other end is blocked with a ring with an inner diameter smaller than the outer diameter of the steel bar head and grouted, and the steel bar with the head Connected, so that the steel bars can be squeezed and bonded between the pier head, the blocking ring, the grouting material and the sleeve to transmit force, which has changed the previous way that the steel bar tension of the prefabricated components connected by grouting is mainly transmitted through bonding. The prefabricated components are connected by post-pouring...

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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