Device for embedding tie bars in secondary structure and construction method

Abstract

The invention relates to a device for embedding a tie bar in a secondary structure and a construction method, belongs to the technical field of building construction, and aims to solve the problem that reworking is caused due to the fact that a pull-out test part of a rear steel bar is qualified in a rear construction mode when the tie bar of the secondary structure is constructed in the prior art. And the direct pre-embedding construction mode has the problems that the mounting and dismounting of the template are influenced, and the later welding quality is difficult to control. The device comprises an embedded pipe, the embedded pipe is of a semi-closed cavity structure with one side open and the interior hollow, and a tie bar is arranged in the embedded pipe from the open side; a pipe body, close to the opening side, of the embedded pipe extends outwards to form an extension pipe; the extension pipe extends towards the opening side, and a pouring opening is formed in the end of the extension pipe. The pipe body where the extension pipe is located is communicated with the hollow cavity of the embedded pipe. The device has no influence on mounting and dismounting of the formwork, can adapt to tie bars with different lengths, fixes the tie bars through pouring and grouting, and is stable in connection. And the device can be used for pre-burying the tie bars at all parts during cast-in-place, and is wide in application range.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a device and construction method for pre-embedded tie bars in secondary structures. Background Technology

[0002] As people's expectations for the built environment continue to rise, their requirements for construction quality are also increasing. In existing building construction, secondary structural tie bars are steel reinforcement components used to connect infill walls with the main structure (such as frame columns, shear walls, etc.), mainly playing a role in enhancing the overall structural integrity of the building.

[0003] In secondary structures, tie bars are often installed using either post-installation or direct pre-embedding methods. However, common problems in actual construction include: post-installation tie bars often fail pull-out tests due to insufficient installation depth, incomplete hole cleaning, and substandard adhesive quality, leading to complete rework. Direct pre-embedding, on the other hand, results in long tie bars that significantly hinder formwork installation and removal. Using shorter pre-embedded bars and welding after formwork removal presents challenges in controlling weld quality. Therefore, a device is needed for pre-embedding tie bars in secondary structures to address the issues of post-installation tie bar failures leading to rework, and direct pre-embedding methods hindering formwork installation and removal and requiring careful control of welding quality. Summary of the Invention

[0004] The purpose of this invention is to provide a device and construction method for pre-embedded tie bars in secondary structures, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for pre-embedded tie bars in secondary structures, comprising a pre-embedded pipe, the pre-embedded pipe being a semi-closed cavity structure with an opening on one side and a hollow interior, the tie bar being inserted into the pre-embedded pipe from the opening side; the pipe body of the pre-embedded pipe extending outward from the opening side to form an extension pipe; the extension pipe extending towards the opening side, and its end being provided with a casting port; the pipe body where the extension pipe is located is connected to the hollow cavity of the pre-embedded pipe.

[0006] Preferably, an installation plate is installed on the open side of the embedded pipe, and the installation plate has installation holes with shapes and sizes that match the shapes and sizes of the tie bars. The tie bars are inserted into the embedded pipe through the installation holes.

[0007] Preferably, a first cap is detachably installed on the open side of the pre-embedded pipe; a second cap is detachably installed on the outside of the pouring port of the extension pipe.

[0008] Preferably, the extension pipe is located above the pre-embedded pipe, and the extension pipe is set at an angle to the pre-embedded pipe. The internal pipe of the extension pipe is provided with at least a pouring channel for the pouring medium to flow into the pre-embedded pipe autonomously under the action of gravity.

[0009] Preferably, the extension pipe is a hollow cavity structure with openings on both sides, with one open side connected to the pre-embedded pipe and the other open side forming the pouring port.

[0010] Preferably, the extension pipe is set at a 45° angle to the pre-embedded pipe.

[0011] Preferably, the horizontal projection of the pouring port of the extension pipe onto the axis of the embedded pipe is consistent with the opening of the embedded pipe.

[0012] Preferably, the first and second covers are made of EPE material, and the cover body of the first cover facing the pre-embedded pipe has a first mounting groove whose shape is adapted to the shape of the pre-embedded pipe, and the cover body of the second cover facing the extension pipe has a second mounting groove whose shape is adapted to the shape of the extension pipe.

[0013] The present invention also provides a construction method for a device for pre-embedded tie bars in secondary structures, comprising the following construction steps: S1. Device placement location: After the building's steel reinforcement is tied, measure the placement location of the device for the pre-embedded tie bars in the secondary structure at the tied steel reinforcement and locate it. S2. Installation device: According to the device positioning position in S1, the device used for pre-embedded tie bars in the secondary structure is welded and fixed to the building reinforcement. S3. Casting the building body: Enclosing the formwork of the building body to form a casting cavity and pouring concrete; S4. Install tie bars after demolding: After the concrete has solidified, demold and clean out the opening of the embedded pipe and the pouring port of the extension pipe according to the location of the device; install the tie bars to be installed into the embedded pipe through the opening of the embedded pipe. S5. Grouting of embedded pipes: Grouting material is poured through the pouring opening cleaned in S4 until it overflows from the pouring opening, and then cured.

[0014] Preferably, in S2, when installing the device, after welding is completed, the first cap should be installed at the opening of the embedded pipe and the second cap should be installed at the pouring port of the extension pipe of the embedded pipe; in S4, when installing the tie bar after demolding, when cleaning out the opening of the embedded pipe and the pouring port according to the device position, the first cap and the second cap should be removed directly, and the surface of the opening of the embedded pipe and the pouring port should be cleaned.

[0015] Beneficial effects: 1. The device for pre-embedded tie bars in secondary structures of the present invention can pre-fix the reinforcing bars of the building structure by setting up pre-embedded pipes. After demolding, its internal hollow cavity can serve as the installation cavity for the tie bars. Simultaneously, the pre-embedded pipe of the present invention is equipped with an extension pipe for pouring grout into the pre-embedded pipe, and its end is provided with a pouring port to achieve the fixing of the tie bars by pouring grout, thereby meeting the pull-out requirements. The device for pre-embedded tie bars in secondary structures of the present invention will not affect the installation and removal of formwork.

[0016] 2. Based on the foregoing, the pre-embedded pipe of the present invention is a semi-closed cavity structure with an opening on one side and a hollow interior. Its hollow interior serves as the installation cavity for tie bars, and can accommodate tie bars of different lengths according to construction requirements. The tie bars are subsequently fixed by pouring grout, ensuring a stable connection and effectively solving the problem of difficult quality control in the construction of post-installed tie bars.

[0017] 3. Based on the foregoing, the device for pre-embedded tie bars in secondary structures of the present invention uses less material, conforms to the modern construction concept of saving materials, aesthetics, and environmental protection, and has certain practical engineering value.

[0018] 4. Based on the foregoing, the device for pre-embedded tie bars in secondary structures of the present invention pre-seales the opening of the pre-embedded pipe and the pouring port of the extension pipe using a first cap and a second cap. Then, during the tying of the reinforcing bars in the building structure, the device of the present invention is fixedly placed with the reinforcing bars according to construction requirements. This allows for the pre-embedding of tie bars in various locations during cast-in-place construction, resulting in a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the device for pre-embedded tie bars in secondary structures, as shown in the embodiment. Figure 2 The left structural view of the device for pre-embedded tie bars in secondary structures according to the embodiment (with the first and second covers installed). Figure 3 The left structural view of the device for pre-embedded tie bars in the secondary structure according to the embodiment (without the first and second covers installed); Figure 4 This is a schematic diagram of the device for pre-embedded tie bars in secondary structures, used as an example, for fixing the reinforcing bars to the building structure during the binding of the reinforcing bars. Figure 5 This is a schematic diagram of the device for pre-embedded tie bars in secondary structures, as shown in the embodiment, where tie bars are installed after the formwork is removed following the completion of the building's casting. Figure 6 This is a schematic diagram of the device for pre-embedded tie bars in secondary structures, which pours grout into the pre-embedded pipe through the pouring port, as an example.

[0020] In the diagram: 1. Embedded pipe; 2. Extension pipe; 3. Second cap; 4. First cap; 5. Tie bar; 6. Installation hole; 7. Pouring port; 8. Reinforcing bar; 9. Grouting material; 10. Building structure. Detailed Implementation

[0021] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments.

[0022] Please see Figures 1-6 This embodiment provides a device for pre-embedded tie bars in secondary structures, including a pre-embedded pipe 1. The pre-embedded pipe is a semi-closed cavity structure with an opening on one side and a hollow interior. Tie bars 5 are inserted into the pre-embedded pipe from the opening side. The pipe body of the pre-embedded pipe 1 extends outward from the opening side to form an extension pipe 2. The extension pipe extends towards the opening side, and its end is provided with a casting port 7. In this embodiment, the extension pipe is a cavity structure with openings on both sides and a hollow interior. One opening side is connected to the pre-embedded pipe, and the other opening side forms a casting port. The horizontal projection of the casting port of the extension pipe in the axial direction of the pre-embedded pipe coincides with the opening of the pre-embedded pipe. The pipe body where the extension pipe is located is connected to the hollow cavity of the pre-embedded pipe. In this embodiment, the pre-embedded pipe is selected as a 20mm diameter iron pipe, and the extension pipe is selected as a 20mm diameter iron pipe. One end of the pre-embedded pipe is sealed by welding an iron sheet to form a closed end, and the other opening forms the opening of the pre-embedded pipe.

[0023] In this embodiment, an installation plate is mounted on the open side of the embedded pipe. The installation plate has mounting holes whose shape and size match the shape and size of the tie bars. The installation plate has a diameter of 20mm, and an 8mm diameter mounting hole 6 is located at its center. The tie bars are inserted into the embedded pipe through the mounting holes. A first cap 4 is detachably mounted on the open side of the embedded pipe; a second cap 3 is detachably mounted on the outside of the pouring port of the extension pipe. Both the first and second caps are 30mm thick pearl rods made of EPE material. The first cap has a first mounting groove on the side facing the embedded pipe, matching the shape of the embedded pipe, and the second cap has a second mounting groove on the side facing the extension pipe, matching the shape of the extension pipe. The first and second caps are fitted onto the open side of the embedded pipe and the pouring port side of the extension pipe through the mounting grooves to prevent concrete from entering the embedded pipe or blocking the opening and pouring port.

[0024] In this embodiment, the extension pipe is located above the pre-embedded pipe, and the extension pipe is set at a 45° angle to the pre-embedded pipe. The inner tube of the extension pipe forms a casting channel for the casting medium to flow into the pre-embedded pipe autonomously under the action of gravity.

[0025] This embodiment also provides a construction method for a device for pre-embedded tie bars in secondary structures, including the following construction steps: S1. Device placement location: After the building's steel reinforcement is tied, measure the placement location of the device for the pre-embedded tie bars in the secondary structure at the tied steel reinforcement and locate it. S2. Installation device: According to the device positioning position in S1, the device for pre-embedded tie bars of secondary structure is welded and fixed to the 10 steel bar 8 of the building body; after welding, the first cap needs to be installed at the opening of the pre-embedded pipe and the second cap needs to be installed at the pouring port of the extension pipe of the pre-embedded pipe. S3. Casting the building body: Enclosing the formwork of the building body to form a casting cavity and pouring concrete; S4. Install tie bars after demolding: After the concrete has solidified, demold and clean out the opening of the embedded pipe and the pouring port of the extension pipe according to the location of the device. When installing tie bars after demolding, directly remove the first and second caps and clean the surface of the embedded pipe opening and the pouring port. Then, install the tie bars to be installed into the embedded pipe by measuring the installation hole of the installation plate through the opening of the embedded pipe. S5. Grouting of embedded pipes: Grout material 9 is poured through the pouring port cleaned out in S4 until it overflows from the pouring port, and then cured.

[0026] Working Principle: The device for pre-embedded tie bars in secondary structures in this embodiment can pre-fix the reinforcing bars of the building structure by setting up a pre-embedded pipe. After demolding, its internal hollow cavity can serve as the installation cavity for the tie bars. Simultaneously, the pre-embedded pipe in this embodiment is equipped with an extension pipe for pouring grout into the pre-embedded pipe, with a pouring port at its end, to fix the tie bars by pouring grout, achieving the pull-out requirements without affecting the installation and removal of the formwork. The internal hollow cavity of the pre-embedded pipe, as the installation cavity for the tie bars, can accommodate tie bars of different lengths according to construction requirements. The tie bars are subsequently fixed by pouring grout, ensuring a stable connection and effectively solving the problem of difficult quality control in post-installed tie bars. The device in this embodiment can be fixedly placed with the reinforcing bars of the building structure according to construction requirements, enabling the pre-embedding of tie bars in various parts during cast-in-place construction, thus having a wide range of applications.

[0027] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A device for embedding a tie bar in a secondary structure comprising an embedding tube, characterized in that, The pre-embedded pipe is a semi-closed cavity structure with one open side, and the tie bar is installed in the pre-embedded pipe from the open side; the pipe body near the open side of the pre-embedded pipe extends outward to form an extension pipe; the extension pipe extends toward the open side, and the end of the extension pipe is provided with a pouring opening; the pipe body where the extension pipe is located is in communication with the hollow cavity of the pre-embedded pipe.

2. A device for embedding a tie bar in a secondary structure according to claim 1, wherein, The open side of the pre-embedded pipe is provided with a mounting plate, and the mounting plate is provided with a mounting hole with a shape and size matched with those of the tie bar; the tie bar is installed in the pre-embedded pipe through the mounting hole.

3. A device for embedding a tie bar in a secondary structure according to claim 1, wherein, The open side of the pre-embedded pipe is detachably provided with a first cover; the pouring opening side of the extension pipe is detachably provided with a second cover.

4. A device for embedding a tie bar in a secondary structure according to claim 1, wherein, The extension pipe is located on the upper side of the pre-embedded pipe, and the extension pipe and the pre-embedded pipe are arranged at an angle; the inner pipe body of the extension pipe is provided with at least a pouring channel through which the pouring medium flows into the pre-embedded pipe under the action of gravity.

5. A device for embedding a tie bar in a secondary structure according to claim 4, wherein, The extension pipe is a cavity structure with two open sides, and one open side is in communication with the pre-embedded pipe, and the other open side constitutes the pouring opening.

6. A device for embedding a tie bar in a secondary structure according to claim 4, wherein, The extension pipe and the pre-embedded pipe are arranged at an angle of 45°.

7. A device for embedding a tie bar in a secondary structure according to claim 1, wherein The horizontal projection of the pouring opening of the extension pipe in the axial direction of the pre-embedded pipe is consistent with the opening of the pre-embedded pipe.

8. A device for embedding a tie bar in a secondary structure according to claim 3, wherein, The first cover and the second cover are made of EPE material, and the cover body on the side of the first cover facing the pre-embedded pipe is provided with a first mounting groove matched with the shape of the pre-embedded pipe; the cover body on the side of the second cover facing the extension pipe is provided with a second mounting groove matched with the shape of the extension pipe.

9. A method of construction of a device for embedding a tie bar in a secondary structure as claimed in any one of claims 1 to 8, characterised in that, The construction steps include: S1, device placement position positioning: after the steel bars of the building body are bound, the placement position of the device for embedding the tie bar of the secondary structure is measured and positioned on the bound steel bars of the building body; S2, installing the device: according to the device positioning position in S1, the device for embedding the tie bar of the secondary structure is welded and fixed to the steel bars of the building body; S3, pouring the building body: the building body formwork is closed to form a pouring cavity, and concrete is poured; S4, installing the tie bar after removing the formwork: after the concrete is solidified, the formwork is removed, the opening of the pre-embedded pipe and the pouring opening of the extension pipe are cleaned according to the device position; the tie bar to be installed is installed in the pre-embedded pipe through the opening of the pre-embedded pipe; S5, pouring and grouting the pre-embedded pipe: pouring and grouting material is poured through the pouring opening cleaned in S4 until it overflows, and maintenance is performed.

10. The construction method of a device for embedding a tie bar in a secondary structure according to claim 9, wherein In S2, when the device is installed, the first cover is installed on the opening of the pre-embedded pipe after welding, and the second cover is installed on the pouring opening of the extension pipe of the pre-embedded pipe; in S4, when the tie bar is installed after removing the formwork, the first cover and the second cover are directly removed when the opening of the pre-embedded pipe and the pouring opening are cleaned according to the device position, and the surface of the opening of the pre-embedded pipe and the pouring opening is cleaned.

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