Prefabricated concrete components, assembled concrete components and methods of pier head lock anchor grouting straight sleeve connection

Abstract

The invention provides a precast concrete component and an assembly concrete component connected with a pier head locking anchor grouting straight sleeve and a production method thereof and belongs to the technical field of construction engineering assembly concrete structures. A method of sleeve connection based on extrusion and binding force transfer is adopted and a pier head (5) and a pier head (6) are machined at two ends of steel bars respectively; the sleeve inner diameter of one end of a connecting sleeve (7) is smaller than the outer diameter of the corresponding end of steel bar pier head (6); the inner diameter of the other end of the connecting sleeve is large and the other end of the connecting sleeve is provided with threads; a blocking ring (10) is connected with the connecting sleeve, wherein the inner diameter of the blocking ring (10) is smaller than the outer diameter of the corresponding end of steel bar pier head (5); the locking anchor extrusion and binding force transfer among the steel bar pier heads, the blocking ring, the sleeve and grouting materials is utilized through the steel bars due to the sleeve grouting and accordingly the mode that the steel bar tension of the previous grouting connection precast component is mainly transferred through bonding is changed. According to the production method, the safety and the economy of the connection of the novel precast concrete component are improved.

Description

technical field [0001] The invention relates to a steel bar connection structure applied to prefabricated concrete components. The two ends of the steel bar are pier thickened, and one end of the sleeve adopts a sleeve inner diameter smaller than the outer diameter of the steel bar pier head at the corresponding end. The pier head is locked and put into the sleeve The other end of the barrel adopts a blocking ring with an inner diameter smaller than the outer diameter of the steel bar pier head at the corresponding end, locks the pier head, and grouts through the sleeve, so that the steel bar is squeezed by the locking anchor between the pier head, the blocking ring, the sleeve and the grouting material. Compression and bonding force transmission, changing the previous way that the tension of the prefabricated components connected by grouting is mainly transmitted through bonding, and using cast-in-place belts to connect the prefabricated components, so that the connection of t...

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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