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Grout sleeve with function of coordination deformation with concrete for prefabricated components

A technology of prefabricated components and grouting sleeves, applied to building components, structural elements, building reinforcements, etc., can solve problems such as structural damage, large cracks in concrete components, hindering the coordinated deformation of concrete and steel bars, etc., and reduce the shear capacity , the effect of reducing the axial stiffness

Inactive Publication Date: 2018-04-10
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the existing grouting sleeve is that the part where the two parts of the concrete member is connected is reinforced at the same time, which hinders the coordinated deformation of the concrete and the steel bar, and then causes large cracks in the concrete member at both ends of the sleeve, not only Affects aesthetics and may accelerate structural failure

Method used

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  • Grout sleeve with function of coordination deformation with concrete for prefabricated components
  • Grout sleeve with function of coordination deformation with concrete for prefabricated components
  • Grout sleeve with function of coordination deformation with concrete for prefabricated components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a grouting sleeve for prefabricated components that coordinates with the deformation of concrete includes a sleeve body 3, the sleeve body 3 is provided with a grouting port 1 and a grout outlet 2, and the sleeve body 3 Convex grooves 5 and reinforcing ribs 4 are provided on the side walls.

[0026] Made of ductile iron material, the total length of the sleeve body 3 is 240mm, which is used to connect steel bars with a diameter of 12mm. The sleeve body 3 is in the shape of a barrel with an inner diameter of 26mm. The thickness is 1mm, and the protruding part surrounds the sleeve vertically, each section is 10mm wide along the axis, and the groove is 2mm wide along the axis. In order to avoid affecting the strength of the sleeve due to stress concentration, arc smoothing can be used near the junction of the concave and convex parts. In order to maintain the connection ability of the sleeve to the two parts of the steel bars, no groove is prov...

Embodiment 2

[0029] Such as figure 2 As shown, two kinds of materials are used, the grouting sleeve with a total length of 240mm is used to connect steel bars with a diameter of 12mm, and the sleeve body 3 is a PVC drum with an inner diameter of 26mm and a thickness of 2mm. The convex groove 5 is a PVC cylinder surrounded by multi-segment end steel vertical perimeter lines, the steel wall thickness is 5mm, each section is 10mm wide along the axis, and a gap of 2mm width is left between each section of steel.

[0030] In this embodiment, vertical reinforcing ribs 4 are provided. The reinforcing ribs 4 have a width of 5 mm and a thickness of 4 mm, and are evenly distributed along the outside of the sleeve. The rib material can be metal or carbon fiber. The reinforcement ribs can be evenly distributed along the circumference of the sleeve, or can be distributed non-uniformly around the sleeve, so as to meet the different requirements for the tension of the sleeve.

Embodiment 3

[0032] Such as image 3 As shown, the grouting sleeve is made of ductile iron material and has a total length of 320mm, which is used to connect steel bars with a diameter of 16mm. The inner side of the sleeve is in the shape of a barrel with a diameter of 30mm. The wall thickness of the inlet part is 1mm, and the protruding part surrounds the sleeve perpendicular to the circumference of the sleeve. Each section is 10mm wide along the axis, and the groove is 2mm wide along the axis. In order to avoid affecting the strength of the sleeve due to stress concentration, arc smoothing can be used near the junction of the concave and convex parts.

[0033] In order to increase the vertical stiffness of the sleeve, a vertical rib 4 is added in this case. The reinforcing ribs 4 have a width of 5mm and a height of 4mm, and are evenly distributed along the outside of the sleeve.

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Abstract

The invention relates to the field of civil construction engineering, in particular to a grout sleeve with a function of coordination deformation with concrete for prefabricated components. The groutsleeve comprises a sleeve body, a grouting port and a grout outlet are formed in the sleeve body, and a convex groove and a reinforcing rib are arranged on the side wall of the sleeve body. Under thepremise that the ring rigidity of the sleeve is not affected basically, the grout sleeve with the decreased vertical rigidity and shearing rigidity can be used for a connecting position of the concrete prefabricated components. The rigidity of the positions, at the sleeve, of the prefabricated components (plate, beam, column and the like) is prevented from being increased excessively, component deformation is prevented from being excessively concentrated on concrete of the two ends of the sleeve accordingly, and a large crack is prevented from occurring to the concrete at the two ends of the sleeve; and the phenomena of short columns and deep beams can also be avoided.

Description

technical field [0001] The invention relates to the field of civil construction engineering, and more particularly relates to a grouting sleeve for a prefabricated component that deforms in harmony with concrete. 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] The grouting sleeves currently used in the connection of concrete prefabricated components are all solid sleeves, such as figure 1 shown. The disadvantage of the existing grouting sleeve is that the part where the two parts of the concrete member is connected is reinforced at th...

Claims

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Application Information

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IPC IPC(8): E04C5/16
CPCE04C5/165
Inventor 于国友苗青
Owner DONGGUAN UNIV OF TECH
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