Reinforcing device based on beam section enlarging method
By using airbags to expand and compress concrete and formwork around the beam, the problem of pouring concrete in the case where it is impossible to make holes in the upper structural slab was solved by using the beam enlargement method reinforcement device. This achieved the compactness and uniformity of the concrete, improved the structure's cohesive load-bearing capacity and construction efficiency, and reduced safety risks.
Patent Information
- Application Number
- CN202423181000.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing reinforcement devices based on the beam enlargement method are difficult to fill with dense concrete when the upper structural slab cannot be perforated, resulting in the new structure and the existing structure not coordinating their stress, and are prone to problems such as voids and lack of density.
Airbags are inflated around the beam to compress the concrete upwards and downwards, making it densely packed. The new structure is tightly integrated with the existing structure through formwork and wedge-shaped pouring ports. The use of high-pressure airbags and formwork together achieves uniform concrete pouring.
It achieves the compactness and uniformity of concrete without drilling holes, ensuring that the new structure and the existing structure share the load, improving the load-bearing capacity and construction efficiency, reducing safety risks, simplifying the construction process and reducing material costs.
Smart Images
Figure CN223937739U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of structural reinforcement technology, specifically to a device for reinforcement based on the method of increasing the cross-section of beams. Background Technology
[0002] With the continuous development of construction engineering and the ever-increasing demands for engineering quality, the effectiveness and reliability of building structure reinforcement face greater challenges. However, existing reinforcement devices based on the beam enlargement method require openings in the upper structural slab to ensure dense concrete pouring for the enlarged beam section. In practice, this is often limited by the inability to open openings in the upper structural slab. Furthermore, existing reinforcement devices based on the beam enlargement method cannot achieve dense concrete pouring at the top without openings in the upper structural slab. This leads to problems such as the newly poured concrete not fitting tightly against the upper structural slab or even detaching from it if the inability to open openings is encountered. Moreover, when reinforcing new structures using existing beam enlargement method reinforcement devices, the new structure often struggles to coordinate with the existing structure in terms of stress distribution, frequently resulting in uneven stress or even no stress at all. Additionally, problems such as voids, insufficient compaction, and unstable rebar anchorage during concrete pouring can easily occur, leading to reinforcement results far below expectations.
[0003] Therefore, how to mitigate or at least alleviate the above-mentioned problems or defects by providing new or other improvements to the reinforcement device based on the beam enlargement method is an urgent problem to be solved. Utility Model Content
[0004] To address the problems existing in the prior art, this utility model provides a device for strengthening beams based on the method of increasing the cross section. This solves the problem that traditional beam strengthening devices require opening holes in the upper original structural slab to ensure the concrete is poured densely, while in actual engineering projects, the upper structural slab often cannot be opened. The structure of the device for strengthening beams based on the method of increasing the cross section provided by this utility model is as follows: it includes a beam to be strengthened (1), the upper end of which is an upper structural slab (2). The device is characterized in that: new steel bars (3) are tied around the perimeter of the beam to be strengthened (1), an airbag (4) is installed in the gap between the new steel bars (3) and the beam to be strengthened (1), and a template (5) made according to the cross-sectional dimensions of the beam to be strengthened (1) is installed on the outside of the beam to be strengthened (1). The upper side of the template (5) is tightly fitted to the bottom of the upper structural slab (2).
[0005] The airbag (4) is long or strip-shaped and surrounds the surface of the beam (1) to be reinforced. During the pouring, the airbag (4) is inflated, causing the airbag (4) to expand upward and downward while simultaneously squeezing the concrete (7) to make it densely filled.
[0006] As a preferred technical solution, the airbag (4) is a high-pressure airbag, and the airbag (4) is provided with an air valve (9) for inflation, and the airbag (4) is located in the middle of the side of the beam (1) to be reinforced.
[0007] As a preferred technical solution, the template (5) has a pre-reserved injection hole (6) at the top and an installation hole (12) in the middle part during its production.
[0008] As a preferred technical solution, when the template (5) is installed, the valve (9) on the airbag (4) surrounding the surface of the beam (1) to be reinforced can accurately pass through the mounting hole (12) on the template (5).
[0009] As a preferred technical solution, the injection hole (6) is provided with a corresponding injection hole sealing plate (8) to achieve the sealing of the injection hole (6).
[0010] As a preferred technical solution, after the airbag (4) is removed, a fixed part is left in the solidified concrete around the beam (1) to be reinforced. The fixed part is an outward-opening long groove-shaped cavity (10). A pouring baffle is installed at the lower outer edge of the cavity (10) to form a wedge-shaped pouring port (13).
[0011] As a preferred technical solution, the upper end of the wedge-shaped pouring port (13) is 100mm higher than the top of the cavity (10) to facilitate subsequent pouring.
[0012] The method of using the above-mentioned beam reinforcement device includes the following steps:
[0013] S1. Clean the surface of the beam to be reinforced (1) according to the design requirements, roughen the bottom section area of the beam to be reinforced (1) and its upper structural plate (2), and tie new steel bars (3) around the beam to be reinforced (1) according to the design requirements.
[0014] S2. Install the airbag (4) into the gap between the newly added steel bar (3) and the beam (1) to be reinforced, and position the airbag (4) in the middle of the side of the beam (1) to be reinforced;
[0015] S3. Make template (5) according to the cross-sectional dimensions of the beam (1) to be reinforced and install it. During installation, the valve (9) on the airbag (4) surrounding the surface of the beam (1) to be reinforced can accurately pass through the mounting hole (12) on the template (5). After installation, the upper side of the template (5) is tightly attached to the bottom of the upper structural plate (2).
[0016] S4. Before pouring, use cement mortar of the same grade as concrete (7) to seal the installation hole (12) and cure it; after completion, pour concrete (7) through the grouting hole (6).
[0017] S5. After the concrete (7) is poured, the grouting hole (6) is sealed with the grouting hole sealing plate (8), and the air compressor pipe is connected to the valve (9) of the air bag (4) and inflated, so that the air bag (4) gradually expands and squeezes the concrete (7) upward and downward until the concrete fills the gap (14) completely and compacts it. Then stop inflating and seal the valve (9).
[0018] S6. After the concrete (7) has completely solidified, remove the upper template (5) of the airbag (4), clean the concrete on the outside of the airbag (4) and take out the airbag (4), and roughen and clean the cavity (10) around the airbag (4) where it is embedded.
[0019] S7. An inclined pouring baffle is installed on the lower edge of the outer side of the cavity (10) to form a wedge-shaped pouring port (13). Self-compacting stone concrete (11) is poured through the wedge-shaped pouring port (13) to fill the cavity (10) and then cured.
[0020] S8. After the self-compacting stone concrete (11) has completely solidified, remove the formwork (5), clean up the excess self-compacting stone concrete (11) at the wedge-shaped pouring port (13) and cure it. Construction is complete.
[0021] As a preferred technical solution, the liquid level of the concrete (7) poured in step S4 is consistent with the bottom height of the grouting hole (6).
[0022] As a preferred technical solution, the volume of the airbag (4) after inflation in step S5 is greater than the volume of the gap (14), so as to achieve the filling and compaction of the gap (14) by the concrete (7).
[0023] Beneficial effects of this utility model
[0024] This utility model discloses a device for beam reinforcement based on the method of enlarging the beam cross-section. It solves the problem that traditional beam reinforcement devices require drilling holes in the existing upper structural slab to ensure dense concrete pouring. This new device eliminates the need for drilling holes while maintaining the density and uniformity of the reinforced concrete, resulting in a tighter bond between the new and existing structures. Simultaneously, it ensures that the new structure at the enlarged cross-section and the existing structure share the load, coordinate deformation, and jointly bear the load, thus improving the structural bearing capacity. This fundamentally solves the problem of uneven or unloaded new structures in traditional pouring devices. In particular, it addresses the difficulty of requiring drilling holes in the existing upper structural slab for dense concrete pouring in traditional beam reinforcement devices, protecting the building's function and usability while reducing safety risks. Furthermore, the structural design of this utility model is simple and intuitive, with a clear and convenient construction process. Whether it's component assembly, concrete pouring, or subsequent disassembly and maintenance, the steps are simple and easy to control, significantly improving construction efficiency, greatly shortening the construction period, and enabling the reinforcement project to be completed quickly and efficiently, restoring the building to its normal usability as soon as possible. All components are reusable and can be disassembled and reassembled, significantly reducing material purchase costs. They can be widely used in projects related to the reinforcement of existing building structures, and have high application value and economic benefits. Attached Figure Description
[0025] Figure 1 This is a flowchart illustrating the installation process of a device for strengthening beams based on the method of increasing beam cross-section.
[0026] The meanings of the markings in the attached diagram are as follows: 1. Beam to be reinforced, 2. Upper structural slab, 3. Newly added reinforcing steel, 4. Airbag, 5. Formwork, 6. Grouting hole, 7. Concrete, 8. Grouting hole sealing plate, 9. Air valve, 10. Cavity, 11. Self-compacting concrete, 12. Installation hole, 13. Wedge-shaped pouring port, 14. Void. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.
[0029] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.
[0030] In the embodiments, by Figure 1 As shown, Figure 1 This is an installation flowchart of a device for strengthening beams based on the method of increasing the cross section. It includes a beam to be strengthened 1, an upper structural plate 2 at the upper end of the beam to be strengthened 1, new steel bars 3 tied around the perimeter of the beam to be strengthened 1, an airbag 4 installed in the gap between the new steel bars 3 and the beam to be strengthened 1, and a template 5 made according to the cross-sectional dimensions of the beam to be strengthened 1 after strengthening is installed on the outside of the beam to be strengthened 1. The upper side of the template 5 is tightly attached to the bottom of the upper structural plate 2.
[0031] The airbag 4 is long and strip-shaped, and it is placed around the surface of the beam 1 to be reinforced. During the pouring, the airbag 4 is inflated, causing the airbag 4 to expand upward and downward and simultaneously squeeze the concrete 7, making it densely filled.
[0032] The airbag 4 is a high-pressure airbag, and the airbag 4 is equipped with an air valve 9 for inflation. The airbag 4 is located in the middle of the side of the beam 1 to be reinforced, and it simultaneously compresses the concrete 7 upward and downward.
[0033] The template 5 has a pre-drilled injection hole 6 at the top and an installation hole 12 in the middle.
[0034] When the template 5 is installed, the valve 9 on the airbag 4 surrounding the surface of the beam 1 to be reinforced can accurately pass through the mounting hole 12 on the template 5, which facilitates the subsequent inflation of the airbag 4.
[0035] The injection hole 6 is provided with a corresponding injection hole sealing plate 8, which is used to seal the injection hole 6.
[0036] After the airbag 4 is removed, a fixed part is left in the solidified concrete around the beam 1 to be reinforced. The fixed part is an outward-opening long groove-shaped cavity 10. A pouring baffle is installed at the lower outer edge of the cavity 10 to form a wedge-shaped pouring port 13.
[0037] The upper end of the wedge-shaped pouring port 13 is 100mm higher than the top of the cavity 10 to facilitate subsequent pouring.
[0038] The specific usage process of the beam-enlargement reinforcement device described in this embodiment is as follows:
[0039] S1. Clean the surface of the beam to be reinforced 1 according to the design requirements, and roughen the bottom enlarged section area of the beam to be reinforced 1 and its upper structural plate 2 according to the design, and tie the newly added steel bars 3 of the beam to be reinforced 1 according to the design requirements.
[0040] S2. Install the airbag 4 into the gap between the newly added steel bar 3 and the beam 1 to be reinforced, and position the airbag 4 at the middle of the height of the beam 1 to be reinforced.
[0041] S3. Make template 5 according to the cross-sectional dimensions of the beam 1 to be reinforced and install it. When installing template 5, the valve 9 can accurately pass through the mounting hole 12. After installation, the upper side of template 5 is tightly attached to the bottom of the upper structural plate 2.
[0042] S4. Before pouring, use cement mortar of the same grade as concrete 7 to seal the installation hole 12 and cure it; after curing, pour concrete 7 through the grouting hole 6, and the liquid level of the concrete 7 is consistent with the bottom height of the grouting hole 6.
[0043] S5. After the concrete 7 is poured, the filling hole 6 is sealed with the filling hole sealing plate 8, and the air compressor pipe is connected to the valve 9 of the air bag 4 and inflated, so that the air bag 4 gradually expands until the concrete completely fills the gap 14. Then, the inflation is stopped and the valve 9 is sealed. The volume of the air bag 4 is greater than the gap 14.
[0044] S6. After the concrete 7 has completely solidified, remove the upper formwork 5 of the airbag 4, clean the concrete on the outside of the airbag 4 and take out the airbag 4, and roughen and clean the cavity 10 around the embedded part of the airbag 4.
[0045] S7. Install a wedge-shaped pouring port 13 on the cavity 10. The upper end of the wedge-shaped pouring port 13 is 100mm higher than the top of the cavity 10. Pour the dense stone concrete 11 into the cavity 10 through the wedge-shaped pouring port 13 and cure it.
[0046] S8. After the self-compacting stone concrete 11 has completely solidified, remove the formwork 5, clean up the excess self-compacting stone concrete 11 at the wedge-shaped pouring port 13 and cure it. Construction is complete.
[0047] In summary, this utility model presents a beam reinforcement device based on the enlarged cross-section method. It solves the problem that traditional beam reinforcement devices require drilling holes in the existing upper structural slab to ensure dense concrete pouring. This new device eliminates the need for drilling holes while maintaining the density and uniformity of the reinforced concrete, resulting in a tighter bond between the new and existing structures. Simultaneously, it ensures that the new structure at the enlarged cross-section and the existing structure share the load, coordinate deformation, and jointly bear the load, thus improving the structural bearing capacity. This fundamentally solves the problem of uneven or unloaded new structures in traditional pouring devices. In particular, it addresses the difficulty of requiring holes in the existing upper structural slab for dense concrete pouring in traditional beam reinforcement devices, protecting the building's function and usability while reducing safety risks. Furthermore, the structural design of this utility model is simple and intuitive, with a clear and convenient construction process. Whether it's component assembly, concrete pouring, or subsequent disassembly and maintenance, the steps are simple and easy to control, significantly improving construction efficiency, greatly shortening the construction cycle, and enabling the reinforcement project to be completed quickly and efficiently, restoring the building to its normal usability as soon as possible. All components are reusable and can be disassembled and reassembled, significantly reducing material purchase costs. They can be widely used in projects related to the reinforcement of existing building structures, and have high application value and economic benefits.
[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. Furthermore, it should be understood that although this specification describes embodiments, it does not encompass only one technical solution. This method of description is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A device for strengthening beams based on the method of increasing the cross section, comprising a beam to be strengthened (1), wherein the top of the beam to be strengthened (1) is an upper structural plate (2), characterized in that: The beam to be reinforced (1) is surrounded by newly added steel bars (3), and an airbag (4) is installed in the gap between the newly added steel bars (3) and the beam to be reinforced (1). A template (5) made according to the cross-sectional dimensions of the beam to be reinforced (1) is installed on the outside of the beam to be reinforced (1), and the upper side of the template (5) is tightly fitted to the bottom of the upper structural plate (2). The airbag (4) is long or strip-shaped and surrounds the surface of the beam (1) to be reinforced. During the pouring, the airbag (4) is inflated, causing the airbag (4) to expand upward and downward while simultaneously squeezing the concrete (7) to make it densely filled.
2. The device for strengthening beams based on the method of increasing beam cross-section as described in claim 1, characterized in that... The airbag (4) is a high-pressure airbag, and the airbag (4) is provided with an air valve (9) for inflation. The airbag (4) is located in the middle of the side of the beam (1) to be reinforced.
3. The device for strengthening beams based on the method of increasing beam cross-section as described in claim 1, characterized in that... The template (5) has a pre-drilled injection hole (6) at the top and an installation hole (12) in the middle.
4. The device for strengthening beams based on the method of increasing beam cross-section as described in claim 1, characterized in that... When the template (5) is installed, the valve (9) on the airbag (4) surrounding the surface of the beam (1) to be reinforced can accurately pass through the mounting hole (12) on the template (5).
5. The device for strengthening beams based on the method of increasing beam cross-section according to claim 3, characterized in that... The injection hole (6) is provided with a corresponding injection hole sealing plate (8) to achieve the sealing of the injection hole (6).
6. The device for strengthening beams based on the method of increasing beam cross-section as described in claim 1, characterized in that... After the airbag (4) is removed, there is a fixed part in the solidified concrete around the beam (1) to be reinforced. The fixed part is a long groove-shaped cavity (10) with an outward opening. A pouring baffle is installed at the lower outer edge of the cavity (10) to form a wedge-shaped pouring port (13).
7. The device for strengthening beams based on the method of increasing beam cross-section as described in claim 6, characterized in that... The upper end of the wedge-shaped pouring port (13) is 100mm higher than the top of the cavity (10) to facilitate subsequent pouring.