CN215977753U

CN215977753U - Prefabricated concrete assembled structure restraint overlap joint pore-forming device tied in a bundle

Info

Publication number: CN215977753U
Application number: CN202122397618.4U
Authority: CN
Inventors: 周建; 吴栋; 黄志诚; 赵福令; 刘斌; 王云飞
Original assignee: Nanjing Architectural Design & Research Institute Co ltd
Current assignee: Nanjing Architectural Design & Research Institute Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-03-08
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a prefabricated concrete assembled structure bundling restraint lap joint pore-forming device, which belongs to the technical field of building construction and comprises a spiral stirrup, wherein a steel wire mesh sleeve is fixedly sleeved on the outer surface of the spiral stirrup, the steel wire mesh sleeve and the spiral stirrup are integrally pre-embedded at the bottom end of a prefabricated concrete shear wall, and the steel wire mesh sleeve can enable peripheral mortar to partially leak to the inner wall of the steel wire mesh sleeve in the pouring process of the prefabricated concrete shear wall so as to form a connecting pore channel with a rough surface in the steel wire mesh sleeve. The steel wire net cover and the spiral stirrup are fixedly sleeved to form a cylindrical whole, and the cylindrical whole is equally divided along the length direction of the precast concrete shear wall and is provided with a plurality of groups. The utility model has the advantages of reducing secondary pipe drawing construction procedures, reducing production and construction difficulty, ensuring the molding quality and integrity of the pore canal, and strengthening the connection effect between the grouting material and the precast concrete due to rough inner wall of the pore canal.

Description

Prefabricated concrete assembled structure restraint overlap joint pore-forming device tied in a bundle

Technical Field

The utility model relates to the technical field of construction and building, in particular to a prefabricated concrete assembly type structure bundling restraint lap joint hole forming device.

Background

Chinese patent CN204876199U discloses a vertical reinforcement centralized constraint lap joint structure of a prefabricated shear wall, which specifically comprises: in the precast concrete shear wall, the upper vertical reinforcing steel bars of the lower shear wall extend into a connecting pore channel reserved at the lower part of the upper shear wall after being bent at equal angles, spiral stirrups with equal screw pitches are arranged outside the pore channel, the vertical reinforcing steel bars and additional vertical reinforcing steel bars are distributed in the pore channel in multiple rows along the wall thickness direction, and the vertical reinforcing steel bars of the upper shear wall and the lower shear wall are in centralized constraint lap joint connection through grouting materials injected later.

In the precast concrete shear wall structure, the metal corrugated pipe is used as a forming die to manufacture the connecting pore canal in the traditional method, and when the metal corrugated pipe is taken out in the initial setting stage of concrete in the construction process, the concrete around the pore canal is easily damaged and collapsed, so that the forming quality of the pore canal is difficult to ensure, the reworking times are more, and the construction progress and the production efficiency of precast components are seriously influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the prefabricated concrete assembled structure bundling restraint lap joint pore-forming device which has the advantage of being capable of avoiding the damage and the collapse of concrete in the pore channel forming process so as to improve the pore channel forming quality.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a prefabricated concrete assembled structure restraint overlap joint pore-forming device tied in a bundle, includes the spiral stirrup, the surface of spiral stirrup cup joints and is fixed with the wire net cover, the wire net cover is as whole pre-buried in the bottom of precast concrete shear force wall with the spiral stirrup, just the wire net cover can make the partial seepage of peripheral mortar to the wire net cover inner wall at the precast concrete shear force wall pouring in-process, and then is in form the coarse connecting hole in surface in the wire net cover.

In order to optimize the technical scheme, the specific measures adopted further comprise:

further, the steel wire net cover and the spiral stirrup are fixedly sleeved to form a cylindrical whole, and the cylindrical whole is equally divided along the equal distance of the length direction of the precast concrete shear wall to form multiple groups.

Further, the diameter of the spiral stirrup in the cylindrical whole body is not less than 6mm, the integral pitch of the spiral stirrup is not more than 100mm, and the pitch of the spiral stirrup at the lower half part extending towards the outer side of the precast concrete shear wall is not more than 50 mm.

Furthermore, the diameter of the steel wires of the steel wire mesh sleeve is not less than 1.0mm, and the diameter of the pores of the steel wire mesh is not more than 20 mm.

Further, the size gap between the inner surface of the welded steel wire mesh sleeve and the outer surface of the spiral stirrup is not larger than 2mm, and the one-side gap between the steel wire mesh sleeve and the spiral stirrup is not larger than 3 mm.

Furthermore, the steel wire net cover is connected with the spiral stirrup in a binding mode through steel wires.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the steel wire mesh replaces the metal corrugated pipe to serve as a pore-forming die in the construction of the prefabricated shear wall, so that the phenomenon that local concrete collapses and is damaged when the metal corrugated pipe is taken out in the initial setting stage of the concrete in the construction process can be avoided, the process is formed in one step, secondary pipe drawing construction procedures are reduced, the production and construction difficulty is reduced, the forming quality and integrity of the pore channel are ensured, and the connection effect between the grouting material and the prefabricated concrete is increased due to the rough inner wall of the pore channel.

2. According to the utility model, the steel wire mesh sleeve is combined with the spiral stirrup and is embedded into the lower end of the prefabricated shear wall to form centralized constraint vertical connection; compared with the traditional construction method, the method has the advantages of one-step forming, convenient construction and better economy.

Drawings

FIG. 1 is a schematic view of the structure of a lower end duct of a prefabricated shear wall according to the present invention;

FIG. 2 is a schematic sectional view of the portion A-A in FIG. 1;

fig. 3 is a schematic view of the wire netting of fig. 1.

The label names in the figure: a steel wire mesh sleeve 1 and a spiral stirrup 2; and reserving the diameter d of the pore passage.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the utility model, and the relative relationship between the terms and the terms is not limited by the scope of the utility model.

Referring to fig. 1-2, the prefabricated concrete assembly structure bundle restraint lap joint pore-forming device of the present embodiment includes a spiral stirrup 2, a steel wire mesh sleeve 1 is fixedly sleeved on an outer surface of the spiral stirrup 2, the steel wire mesh sleeve 1 and the spiral stirrup 2 are embedded in a bottom end of a prefabricated concrete shear wall as a whole, and the steel wire mesh sleeve 1 can make a part of peripheral mortar leak to an inner wall of the steel wire mesh sleeve 1 in a pouring process of the prefabricated concrete shear wall, so as to form a connection pore with a rough surface in the steel wire mesh sleeve 1.

In this embodiment, the spiral stirrup 2 is used as a framework, the steel wire mesh sleeve 1 and the spiral stirrup 2 are fixedly sleeved to form a cylindrical whole, and a connecting channel with a corresponding specification is formed in the precast concrete shear wall pouring process through the cylindrical entity.

Wherein, cylindrical whole just equally divide along precast concrete shear wall's length direction equidistance and set up the multiunit, wherein 2 diameters of spiral stirrup among the cylindrical whole are not less than 6mm, and its whole pitch is not more than 100mm, and 2 pitches of the latter half spiral stirrup that extend towards the precast concrete shear wall outside are not more than 50 mm.

Referring to fig. 3, in order to ensure the mortar to partially leak during the concrete pouring process, the diameter of the steel wires of the steel wire mesh cover 1 is not less than 1.0mm, and the diameter of the pores of the steel wire mesh is not more than 20 mm.

In this embodiment, for steel wire netting 1 and spiral stirrup 2 guarantee reliable connection, guarantee that there is the concrete bond between the two to wrap up, welding forming's 1 internal surface of steel wire netting and 2 external surface size clearances of spiral stirrup are not more than 2mm, and the unilateral clearance between overlapping forming's steel wire netting 1 and the spiral stirrup 2 is not more than 3 mm.

Wherein, the steel wire net cover 1 is connected with the spiral stirrup 2 by steel wire binding.

It should be noted that the steel wire mesh sleeve 1 is adopted to replace a metal corrugated pipe used in the traditional method to serve as a pore channel forming die, so that the phenomena of local concrete collapse and damage caused when the metal corrugated pipe is taken out in the initial setting stage of concrete in the construction process are avoided, the process is formed in one step, secondary pipe drawing construction procedures are reduced, the production and construction difficulty is reduced, the forming quality and integrity of the pore channel are ensured, the connection effect between grouting material and precast concrete is enhanced due to the rough inner wall of the pore channel, and the steel wire mesh sleeve can be widely applied to the concentrated restraining and lap joint of vertical reinforcing steel bars of a shear wall in a precast concrete assembly structure of a multi-story and high-rise building.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may be made by those skilled in the art without departing from the principle of the utility model.

Claims

1. The utility model provides a prefabricated concrete assembled structure restraint overlap joint pore-forming device tied in a bundle which characterized in that, includes spiral stirrup (2), the surface cup joints and is fixed with wire netting cover (1) spiral stirrup (2), wire netting cover (1) and spiral stirrup (2) are as whole pre-buried in the bottom of precast concrete shear force wall, just wire netting cover (1) can make the partial seepage of peripheral mortar to wire netting cover (1) inner wall at precast concrete shear force wall pouring in-process, and then form the rough surface connected pore in wire netting cover (1).

2. The precast concrete assembled structure bundling restraint lap joint pore-forming device of claim 1, characterized in that, the wire mesh sleeve (1) and the spiral stirrup (2) are sleeved and fixed to form a cylindrical whole, and the cylindrical whole is equally spaced and provided with multiple groups along the length direction of the precast concrete shear wall.

3. The precast concrete fabricated structure bundle constraint lap joint pore-forming device according to claim 2, wherein the diameter of the spiral stirrup (2) in the cylindrical whole body is not less than 6mm, the overall pitch of the spiral stirrup is not more than 100mm, and the pitch of the spiral stirrup (2) in the lower half part extending towards the outer side of the precast concrete shear wall is not more than 50 mm.

4. The preformed concrete fabricated structure bundling restraint lap joint pore-forming device of claim 1, wherein the diameter of the steel wire mesh cover (1) is not less than 1.0mm, and the diameter of the steel wire mesh pore is not more than 20 mm.

5. The precast concrete assembled structure bundling restraint lap joint pore-forming device of claim 1, characterized in that the dimensional clearance between the inner surface of the welded steel wire mesh cover (1) and the outer surface of the spiral stirrup (2) is not more than 2mm, and the unilateral clearance between the welded steel wire mesh cover (1) and the spiral stirrup (2) is not more than 3 mm.

6. The preformed concrete assembled structure bundling restraint lap joint pore-forming device according to any one of claims 2-3, characterized in that the wire mesh cover (1) and the spiral stirrup (2) are connected by wire binding.