High-low-grade concrete stubble blocking structure for beam-column joint

Abstract

The utility model discloses a beam-column joint high-low grade concrete stubble blocking structure, a beam-column joint comprises a beam-column reinforcing mesh, a floor reinforcing mesh and a wood formwork, the beam-column reinforcing mesh comprises main reinforcements and stirrups, the floor reinforcing mesh comprises transverse reinforcements and longitudinal reinforcements, the longitudinal reinforcements are parallel to the main reinforcements, and the stubble blocking structure comprises an air bag assembly and a stubble blocking assembly. The air bag assembly is arranged at the interface of the high-grade concrete and the low-grade concrete; the air bag assembly comprises air bag single bodies which are inserted between the wood formwork and the main reinforcements and between the adjacent main reinforcements from top to bottom, and the height of the air bag single bodies exceeds the upper side of the floor reinforcing mesh. Air vents are formed in the air bag single bodies; the first fixing assembly is used for connecting the air bag assembly and the beam column reinforcing mesh; the second fixing assembly is used for connecting the air bag assembly and the floor reinforcing mesh. The air bag single bodies are fixed through the first fixing assemblies and the second fixing assemblies, the air bags can be prevented from moving under the impact of concrete, and then the pouring amount of high-grade concrete can be effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of cast-in-place construction engineering, and more specifically, to a high- and low-grade concrete retaining structure for beam-column joints. Background Technology

[0002] In cast-in-place construction projects, high-grade concrete is typically used for columns, while low-grade concrete is used for beams. To prevent the high-grade concrete from flowing in the core area of ​​the beam-column joint, a retaining structure is needed to ensure that all columns are cast with high-grade concrete and to minimize waste. Traditional retaining structures for high- and low-grade concrete involve using dense wire mesh or quick-closing mesh after the reinforcing bars are tied. However, these mesh components have several drawbacks. For example, the material rigidity of the mesh retainers is low, making them easily broken by concrete and prone to grout leakage; due to the large number of reinforcing bars and end anchorages at the column-slab junction, mesh retainers are difficult to place, and if forcibly placed in a designated position, they are easily penetrated and damaged by the reinforcing bars, losing their retaining function; the wire mesh is generally cast as a single unit, meaning it is used only once and consumes a lot of material; and so on.

[0003] Chinese utility model patent CN221896232U discloses an isolation airbag body tube, which involves setting multiple columnar airbags at the interface between high-grade and low-grade concrete. After inflation, the airbags form an isolator for interception, offering advantages such as easy installation, reusability, and environmental friendliness. However, the airbags are lightweight and easily displaced under the impact of concrete, thus affecting the interception effect. Utility Model Content

[0004] The main purpose of this utility model is to provide a high- and low-grade concrete retaining structure for beam-column joints to solve the technical problem of easy displacement of airbags in the prior art.

[0005] To achieve the above objectives, this utility model provides a beam-column joint structure with high and low grade concrete retaining walls, the technical solution of which is as follows:

[0006] A beam-column joint with high and low grade concrete retaining structures is provided. The beam-column joint includes beam-column reinforcement mesh, floor slab reinforcement mesh, and wooden formwork. The beam-column reinforcement mesh includes main bars and stirrups, and the floor slab reinforcement mesh includes transverse bars and longitudinal bars, with the longitudinal bars parallel to the main bars. The retaining structure includes: an airbag assembly located at the interface between the high-grade concrete and the low-grade concrete; the airbag assembly includes individual airbags inserted from top to bottom between the wooden formwork and the main bars, as well as between adjacent main bars, with a height exceeding the upper part of the floor slab reinforcement mesh; each airbag has a vent; a first fixing component for connecting the airbag assembly and the beam-column reinforcement mesh; and a second fixing component for connecting the airbag assembly and the floor slab reinforcement mesh.

[0007] In the beam-column joint high and low grade concrete retaining structure of this utility model, the airbag unit is fixed by the first fixing component and the second fixing component, which can prevent the airbag from shifting under the impact of concrete, thereby effectively ensuring the pouring volume of high grade concrete and avoiding waste of high grade concrete.

[0008] As a further improvement to the aforementioned beam-column joint high-low grade concrete retaining structure: the first fixing component includes a first limiting part located on one or both sides of the airbag component and connected to the beam-column steel mesh. The airbag component is installed between the stirrups and the first limiting part or between two first limiting parts. Therefore, the composition of the first fixing component can be adaptively adjusted according to the installation position.

[0009] As a further improvement to the aforementioned beam-column joint high- and low-grade concrete retaining structure: the first limiting part is a C-shaped member or hoop surrounding the outer side of the main reinforcement bar on the upper side of the beam-column steel mesh. Therefore, the structure is simple, easy to operate, and provides good limiting effect.

[0010] As a further improvement to the aforementioned beam-column joint high-low grade concrete retaining structure: the second fixing component includes a second limiting part located on one or both sides of the airbag component and connected to the floor slab reinforcement mesh. The airbag component is installed between the transverse reinforcement and the second limiting part, or between two second limiting parts. Thus, the composition of the first fixing component can be adaptively adjusted according to the installation position.

[0011] As a further improvement to the aforementioned beam-column joint high- and low-grade concrete retaining structure, the second limiting part is a C-shaped member or hoop surrounding the outer side of the longitudinal reinforcement on the upper side of the floor slab reinforcement mesh. This results in a simple structure, easy operation, and good limiting effect.

[0012] As a further improvement to the aforementioned beam-column joint high-low grade concrete retaining structure, the second fixing component further includes a third limiting part, which connects to the transverse reinforcement and the second limiting part, or connects two second limiting parts. This limits the airbag assembly around its perimeter, significantly improving the fixing effect of the airbag assembly.

[0013] As a further improvement to the aforementioned beam-column joint high- and low-grade concrete retaining structure, the third limiting part is a C-shaped member or hoop that surrounds the outside of the transverse reinforcement and the second limiting part, or surrounds the outside of both second limiting parts. Therefore, the structure is simple, easy to operate, and has a good limiting effect.

[0014] As a further improvement to the aforementioned beam-column joint high-low grade concrete retaining structure: the installation width formed by the first fixing component is smaller than the installation width formed by the second fixing component. This ensures that the portion of the airbag assembly located within the beam-column reinforcing mesh can better fill the gap, allowing the first fixing component to better prevent displacement of the airbag assembly.

[0015] In summary, the beam-column joint high and low grade concrete retaining structure of this utility model is simple in structure, easy to install, and not easily displaced under concrete impact, ensuring a good interception effect. It effectively solves the technical problem of airbag easy displacement in the prior art and has strong practicality.

[0016] The embodiments of the invention provided in this specification will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the embodiments of the invention provided in this specification will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the embodiments of the invention provided in this specification. Attached Figure Description

[0017] The accompanying drawings, which form part of the embodiments of the invention provided in this specification, are used to aid in understanding the embodiments of the invention provided in this specification. The content provided in the drawings and the related descriptions in the embodiments of the invention provided in this specification can be used to explain the embodiments of the invention provided in this specification, but do not constitute an undue limitation on the embodiments of the invention provided in this specification. In the drawings:

[0018] Figure 1 This is a side view of the beam-column steel reinforcement mesh and the floor slab steel reinforcement mesh in the high-low grade concrete retaining structure of the beam-column joint of Embodiment 1 of this utility model.

[0019] Figure 2 This is a top view of the beam-column steel reinforcement mesh and floor slab steel reinforcement mesh in the high-low grade concrete retaining structure of the beam-column joint of Embodiment 1 of this utility model.

[0020] Figure 3 This is a side view of the beam-column joint high and low grade concrete retaining structure of Embodiment 1 of this utility model (the airbag unit is in a deflated state).

[0021] Figure 4 This is a side view of the beam-column joint high and low grade concrete retaining structure of Embodiment 1 of this utility model (the airbag unit is in an inflated state).

[0022] Figure 5 This is a top view of the first fixing component in the high and low grade concrete retaining structure of the beam-column joint of Embodiment 1 of this utility model (the airbag unit is in an inflated state).

[0023] Figure 6 This is a top view of the second fixing component in the high and low grade concrete retaining structure of the beam-column joint of Embodiment 1 of this utility model (the airbag unit is in an inflated state).

[0024] Figure 7 This is a side view of the beam-column joint high and low grade concrete retaining structure of Embodiment 2 of this utility model (the airbag unit is in an inflated state).

[0025] The relevant markings in the above figures are:

[0026] 110-Wooden formwork, 120-Main reinforcement, 130-Stirrups, 140-Horizontal reinforcement, 150-Longitudinal reinforcement, 200-Airbag unit, 210-Ventilation port, 300-First limiting part, 400-Second limiting part, 500-Third limiting part. Detailed Implementation

[0027] The embodiments of the invention provided in this specification will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the embodiments of the invention provided in this specification based on these descriptions. Before describing the embodiments of the invention provided in this specification in conjunction with the accompanying drawings, it should be particularly noted that:

[0028] The technical solutions and features provided in the embodiments of the invention provided in this specification, including the following description, can be combined with each other without conflict.

[0029] Furthermore, the embodiments of the inventions provided in this specification mentioned below are generally only a portion of the embodiments of the inventions provided in this specification, and not all of them. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the inventions provided in this specification without creative effort should fall within the scope of protection of the embodiments of the inventions provided in this specification.

[0030] Regarding the terminology and units in the embodiments of the invention provided in this specification: The terms "comprising," "including," "having," and any variations thereof in the description, claims, and related parts of the embodiments of the invention provided in this specification are intended to cover non-exclusive inclusion. Furthermore, other relevant terms and units in the embodiments of the invention provided in this specification can be reasonably interpreted based on the relevant content of the embodiments of the invention provided in this specification.

[0031] Example 1

[0032] Figure 1 This is a side view of the beam-column reinforcement mesh and floor slab reinforcement mesh in the high- and low-grade concrete retaining structure of the beam-column joint in this embodiment. Figure 2 This is a top view of the beam-column reinforcement mesh and floor slab reinforcement mesh in the high- and low-grade concrete retaining structure of the beam-column joint in this embodiment.

[0033] like Figure 1-2As shown, the beam-column joint includes beam-column steel mesh, floor slab steel mesh, and wooden formwork 110. The beam-column steel mesh includes main bars 120 and stirrups 130. The floor slab steel mesh includes transverse bars 140 and longitudinal bars 150. The longitudinal bars 150 are parallel to the main bars 120.

[0034] Figure 3 This is a side view of the high and low grade concrete retaining structure at the beam-column joint in this embodiment (the individual airbags are in a deflated state). Figure 4 This is a side view of the high and low grade concrete retaining structure of the beam-column joint in this embodiment (the airbag unit is in an inflated state). Figure 5 This is a top view of the first fixing component in the high and low grade concrete retaining structure of the beam-column joint in this embodiment (the airbag unit is in an inflated state). Figure 6 This is a top view of the second fixing component in the high and low grade concrete retaining structure of the beam-column joint in this embodiment (the airbag unit is in an inflated state).

[0035] like Figure 3-6 As shown, the beam-column joint high- and low-grade concrete retaining structure of this embodiment includes an airbag assembly, a first fixing assembly, and a second fixing assembly. The airbag assembly is located at the interface between the high-grade and low-grade concrete; the airbag assembly includes an airbag unit 200 inserted from top to bottom between the wooden formwork 110 and the main reinforcement 120, and between adjacent main reinforcement 120, with its height exceeding the upper side of the floor slab reinforcement mesh; the airbag unit 200 is provided with a vent 210. The first fixing assembly is used to connect the airbag assembly and the beam-column reinforcement mesh. The second fixing assembly is used to connect the airbag assembly and the floor slab reinforcement mesh.

[0036] The first fixing component includes a first limiting part 300 disposed on one side of the airbag component and connected to the beam and column steel mesh. The airbag component is installed between the stirrup 130 and the first limiting part 300. The first limiting part 300 is a stirrup that surrounds the outer side of the upper main bar 120 of the beam and column steel mesh.

[0037] The second fixing component includes second limiting portions 400 disposed on both sides of the airbag assembly and connected to the floor slab reinforcement mesh, the airbag assembly being installed between the two second limiting portions 400; the second limiting portions 400 are hoop members surrounding the outer side of the upper longitudinal reinforcement 150 of the floor slab reinforcement mesh. The second fixing component also includes a third limiting portion 500, the third limiting portion 500 connecting the two second limiting portions 400; the third limiting portion 500 is a hoop member surrounding the outer side of the two second limiting portions 400.

[0038] The installation width formed by the first fixing component is smaller than the installation width formed by the second fixing component. Specifically, the installation width formed by the first fixing component is 5 to 20 mm smaller than the installation width formed by the second fixing component.

[0039] Example 2

[0040] Figure 7 This is a side view of the high and low grade concrete retaining structure of the beam-column joint in this embodiment (the airbag unit is in an inflated state).

[0041] Compared with Example 1, the difference between the high and low grade concrete retaining structure of the beam-column joint in this example is that the first limiting part 300 is a C-shaped member surrounding the outer side of the upper main reinforcement 120 of the beam-column steel reinforcement mesh; the second limiting part 400 is a C-shaped member surrounding the outer side of the upper longitudinal reinforcement 150 of the floor slab steel reinforcement mesh.

[0042] In practical use, the number of retaining structures of the above embodiment used for each beam-column node is 2-4, depending on the shape of the beam-column node (I-shaped, T-shaped, or cross-shaped).

[0043] The terms "high-grade concrete" and "low-grade concrete" refer to the strength grade of concrete. According to the "Standard for Design of Concrete Structures" GB / T 50010-2010, concrete strength grades include C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, and C80. The higher the number, the higher the strength grade.

[0044] The embodiments of the invention provided in this specification have been described above. Those skilled in the art will be able to implement the embodiments of the invention provided in this specification based on these descriptions. All other preferred embodiments and implementations obtained by those skilled in the art based on the above description of the embodiments of the invention provided in this specification without inventive effort should fall within the protection scope of the embodiments of the invention provided in this specification.

Claims

1. A beam-column joint with high and low grade concrete retaining structure, the beam-column joint including beam-column steel mesh, floor slab steel mesh and wooden formwork (110), the beam-column steel mesh including main bars (120) and stirrups (130), the floor slab steel mesh including transverse bars (140) and longitudinal bars (150), the longitudinal bars (150) being parallel to the main bars (120), characterized in that: The stubble-blocking structure includes: An airbag assembly is provided at the interface between high-grade concrete and low-grade concrete; the airbag assembly includes an airbag unit (200) inserted from top to bottom between the wooden formwork (110) and the main reinforcement (120) and between adjacent main reinforcement (120), and whose height exceeds the upper side of the floor slab reinforcement mesh; the airbag unit (200) is provided with a vent (210); The first fixing component is used to connect the airbag assembly and the beam-column steel mesh; The second fixing component is used to connect the airbag assembly and the floor slab steel mesh.

2. The beam-column joint high and low grade concrete retaining structure as described in claim 1, characterized in that: The first fixing component includes a first limiting part (300) disposed on one or both sides of the airbag component and connected to the beam and column steel mesh. The airbag component is installed between the stirrup (130) and the first limiting part (300) or between two first limiting parts (300).

3. The beam-column joint high and low grade concrete retaining structure as described in claim 2, characterized in that: The first limiting part (300) is a C-shaped part or hoop that surrounds the outer side of the main reinforcement (120) on the upper side of the beam and column steel reinforcement mesh.

4. The beam-column joint high and low grade concrete retaining structure as described in claim 2, characterized in that: The second fixing component includes a second limiting part (400) disposed on one or both sides of the airbag component and connected to the floor slab steel mesh. The airbag component is installed between the horizontal reinforcement (140) and the second limiting part (400) or between two second limiting parts (400).

5. The beam-column joint high and low grade concrete retaining structure as described in claim 4, characterized in that: The second limiting part (400) is a C-shaped part or hoop that surrounds the outer side of the longitudinal reinforcement (150) on the floor slab reinforcement mesh.

6. The beam-column joint high and low grade concrete retaining structure as described in claim 4, characterized in that: The second fixing component further includes a third limiting part (500), which connects the transverse rib (140) and the second limiting part (400) or connects two second limiting parts (400).

7. The beam-column joint high and low grade concrete retaining structure as described in claim 6, characterized in that: The third limiting part (500) is a C-shaped part or hoop that surrounds the outside of the transverse rib (140) and the second limiting part (400) or surrounds the outside of the two second limiting parts (400).

8. The beam-column joint high and low grade concrete retaining structure as described in claim 1, characterized in that: The mounting width formed by the first fixing component is smaller than the mounting width formed by the second fixing component.

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