Reinforcement connection structure and reinforcement treatment method of insufficient beam height of attached cantilever scaffold

Abstract

The application provides a reinforcing connection structure and a reinforcing treatment method for an attached cantilever scaffold under a beam height insufficient condition. The reinforcing structure comprises an L-shaped connection reinforcing piece. The L-shaped connection reinforcing piece has a horizontal wing plate and a vertical wing plate perpendicular to each other, and a ribbed plate is arranged between the horizontal wing plate and the vertical wing plate. During installation, the horizontal wing plate is attached to the bottom surface of the concrete beam and is anchored and connected to the bottom of the beam through an anchor, and the vertical wing plate is attached to the exposed area of the I-beam end plate and is tightly connected to the end plate through a connecting piece, so that the connection between the end plate and the beam body is re-established in the exposed area of the end plate. The application is simple to operate, does not need to be destructively treated on the original structure beam, the reinforcing piece can be disassembled and reused after installation, has good standardization promotion conditions, and effectively ensures the overall stability and construction safety of the attached cantilever scaffold under the beam height insufficient condition.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a reinforcement connection structure and reinforcement treatment method for the case of insufficient height of attached cantilever beams. Background Technology

[0002] Attached cantilever scaffolding is a widely used external scaffolding system in building construction. Compared with ordinary cantilever scaffolding, attached cantilever scaffolding directly anchors the end plates of the I-beam cantilever beams to the sides of the floor structural beams, utilizing the structural beams to support the cantilever structure. It has advantages such as better load-bearing capacity and less impact on external wall waterproofing, and is widely used in high-rise building construction. The installation method of attached cantilever scaffolding dictates certain requirements for the cross-sectional height of the floor structural beams.

[0003] However, in actual engineering construction, due to the diversity of building structures, beam cross-sectional heights vary across floors. When the cross-sectional height of a structural beam at a certain location is less than the vertical height of the I-beam end plate, the end plate cannot fully fit against the beam side, and the lower part of the end plate will be exposed below the bottom surface of the structural beam. Under this condition, the force transmission path between the cantilevered I-beam end plate and the beam is incomplete, and the stress state and overall stability of the cantilevered frame pose certain safety hazards, failing to meet construction safety requirements. Existing technologies cannot effectively solve the problem of insufficient contact area between the end plate and the beam without altering the original structural beam cross-section.

[0004] Therefore, it is of great significance to provide a reinforcement connection structure and reinforcement treatment method for the case of insufficient height of the attached cantilever beam. Summary of the Invention

[0005] The purpose of this invention is to provide a reinforcement connection structure and reinforcement method for the case of insufficient height of the attached cantilever beam, so as to solve the problems existing in the prior art.

[0006] The technical solution adopted to achieve the purpose of this invention is as follows: a reinforcement connection structure for situations where the height of the attached cantilevered external scaffold beam is insufficient. The attached cantilevered I-beam is connected to the side of the concrete beam via an end plate. The vertical height of the end plate is greater than the cross-sectional height of the concrete beam. The lower part of the end plate is exposed below the bottom surface of the concrete beam. The reinforcement connection structure includes L-shaped connecting reinforcement components, anchors, and connectors.

[0007] The L-shaped connecting reinforcement includes mutually perpendicular horizontal and vertical flanges. The horizontal flange is located below and in contact with the bottom surface of the concrete beam. The vertical flange is located on one side of the exposed area of ​​the end plate and in contact with the exposed area of ​​the end plate. A reinforcing plate is provided between the horizontal and vertical flanges. The reinforcing plate is fixedly connected to the two flanges. Bolt holes are provided on both the horizontal and vertical flanges.

[0008] The anchors pass through bolt holes on the horizontal flanges, anchoring the horizontal flanges to the bottom of the concrete beam. The connectors pass through bolt holes on the vertical flanges, securing the vertical flanges to the exposed area of ​​the end plate. The anchoring of the L-shaped connectors to the bottom of the beam and their fastening to the end plate form a complete load transfer path in the exposed area of ​​the end plate, ensuring the stability of the cantilever frame even when the beam height is insufficient.

[0009] Furthermore, the L-shaped connecting reinforcement is welded from a 12mm thick Q235 steel plate. The reinforcing rib is a 10mm thick Q235 steel plate.

[0010] Furthermore, the vertical wing plate has one bolt hole, and the horizontal wing plate has two bolt holes, each bolt hole being 22mm wide and not less than 50mm long.

[0011] Furthermore, the anchor is an A8.8 grade M20 semi-embedded high-strength bolt, equipped with a washer with a specification of 80mm×80mm×10mm, and a double bolt fixing method.

[0012] Furthermore, the connector is an M20 bolt, equipped with a washer with specifications of 80mm×80mm×10mm, and uses a double bolt fixing method.

[0013] This invention also discloses a reinforcement method for beams with insufficient height when attached cantilever scaffolding is in operation, comprising the following steps:

[0014] S1) Install and align the attached cantilevered I-beam end plate with the concrete beam to complete the initial fixation.

[0015] S2) Place the L-shaped connecting reinforcement at the lower part of the end plate, where it is exposed below the bottom surface of the concrete beam. Adjust the L-shaped connecting reinforcement so that the horizontal flange is flush with the bottom surface of the concrete beam and the vertical flange is in close contact with the exposed area of ​​the I-beam end plate. Anchor the L-shaped connecting reinforcement to the bottom of the concrete beam using anchors that pass through the bolt holes on the horizontal flange.

[0016] S3) Secure the L-shaped connecting reinforcement to the exposed area of ​​the I-beam end plate by passing the connector through the bolt holes on the vertical flange.

[0017] S4) For each part with insufficient beam height, repeat steps S2) to S3) in sequence to complete the reinforcement installation at each point one by one until all exposed end plates are reliably connected to the concrete beam through L-shaped connecting reinforcements.

[0018] The technical effects of this invention are beyond doubt:

[0019] A. The connection between the end plate and the beam was re-established in the area where the contact was originally missing, so that the cantilevered I-beam end plate can still form a complete load transfer path under the condition of insufficient beam height, fundamentally eliminating the weak link caused by insufficient contact surface.

[0020] B. The reinforcement method of the external components does not involve any destructive treatment such as chiseling, enlarging the cross section or installing rebar on the concrete structural beams throughout the process. The construction operation causes minimal disturbance to the original structure, effectively reducing the construction difficulty and impact on the construction period while ensuring safety.

[0021] C. After the completion of the phased construction tasks, it can be completely dismantled and transferred to other areas with insufficient beam height for continued use, realizing the recycling of materials and effectively saving construction costs.

[0022] D. The installation steps are simple and clear, and ordinary construction workers can complete the process by following the procedure. No special trades or complex equipment are required. It is highly adaptable to site conditions and easy to promote and apply in different engineering projects. Attached Figure Description

[0023] Figure 1 A schematic diagram showing the connection between the attached cantilever and the beam;

[0024] Figure 2 Front elevation view of the reinforced component;

[0025] Figure 3 Side elevation view of the reinforced component;

[0026] Figure 4 Side view of the reinforced component.

[0027] In the diagram: L-shaped connecting reinforcement 1, anchor 2, connector 3. Detailed Implementation

[0028] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0029] Example 1:

[0030] See Figures 1-4 This embodiment provides a reinforcement connection structure for situations where the height of the attached cantilevered scaffold beam is insufficient. The attached cantilevered I-beam is connected to the side of the concrete beam via an end plate. The vertical height of the end plate is greater than the cross-sectional height of the concrete beam. The lower part of the end plate is exposed below the bottom surface of the concrete beam. The reinforcement connection structure includes an L-shaped connecting reinforcement 1, an anchor 2, and a connector 3.

[0031] The L-shaped connecting reinforcement 1 includes a horizontal wing plate and a vertical wing plate that are perpendicular to each other. The horizontal wing plate is located below the bottom surface of the concrete beam and is in contact with the bottom surface of the concrete beam. The vertical wing plate is located on one side of the exposed area of ​​the end plate and is in contact with the exposed area of ​​the end plate. A reinforcing plate is provided between the horizontal wing plate and the vertical wing plate. The reinforcing plate is fixedly connected to the two wing plates. Bolt holes are provided on both the horizontal wing plate and the vertical wing plate.

[0032] The anchors pass through bolt holes on the horizontal flanges, anchoring the horizontal flanges to the bottom of the concrete beam. The connectors pass through bolt holes on the vertical flanges, fastening the vertical flanges to the exposed area of ​​the end plate. The anchoring of the L-shaped connecting reinforcement 1 to the bottom of the beam and its fastening to the end plate form a complete load transfer path in the exposed area of ​​the end plate, ensuring the stability of the cantilever frame under conditions of insufficient beam height.

[0033] Example 2:

[0034] The main content of this embodiment is the same as that of Embodiment 1, wherein the L-shaped connecting reinforcement 1 is welded from a 12mm thick Q235 steel plate. The reinforcing plate is a 10mm thick Q235 steel plate.

[0035] Example 3:

[0036] The main content of this embodiment is the same as that of Embodiment 1 or 2, wherein the vertical wing plate has one bolt hole. The horizontal wing plate has two bolt holes, each bolt hole being 22mm wide and not less than 50mm in length.

[0037] Example 4:

[0038] The main content of this embodiment is the same as any one of embodiments 1 to 3. The anchor 2 is an A8.8 grade M20 semi-embedded high-strength bolt, equipped with a washer with a specification of 80mm×80mm×10mm, and a double bolt fixing method is adopted.

[0039] Example 5:

[0040] The main content of this embodiment is the same as any one of embodiments 1 to 4. In this embodiment, the connecting part 3 is an M20 bolt, with a washer of 80mm×80mm×10mm, and a double bolt fixing method is used.

[0041] Example 6:

[0042] This embodiment provides a reinforcement method for insufficient height of attached cantilever beams, using the reinforcement connection structure described in any one of embodiments 1-5, and performing the reinforcement treatment according to the following steps:

[0043] S1) Install and align the attached cantilevered I-beam end plate with the concrete beam to complete the initial fixation.

[0044] S2) Place the L-shaped connecting reinforcement 1 on the lower part of the end plate, exposed below the bottom surface of the concrete beam. Adjust the L-shaped connecting reinforcement 1 so that the horizontal flange is flush with the bottom surface of the concrete beam and the vertical flange is in close contact with the exposed area of ​​the I-beam end plate. Anchor the L-shaped connecting reinforcement 1 to the bottom of the concrete beam through the bolt holes on the horizontal flange using the anchor 2.

[0045] S3) The L-shaped connecting reinforcement 1 is fastened to the exposed area of ​​the I-beam end plate by passing the connector 3 through the bolt hole on the vertical wing plate.

[0046] S4) For each part with insufficient beam height, repeat steps S2) to S3) in sequence to complete the reinforcement installation at each point until all exposed end plates are reliably connected to the concrete beam through L-shaped connecting reinforcement 1.

[0047] Example 7:

[0048] This embodiment is similar in content to any one of Embodiments 1-6, but uses the construction of attached cantilever scaffolding for the main structure and supporting facilities of Buildings 65# and 66# in Phase VI, Section 3 of the Evergrande Tianfu Peninsula as its application background. During construction, the cross-sectional height of some floor structural beams was insufficient, causing the lower part of the attached cantilever I-beam end plates to protrude below the bottom surface of the structural beams after installation. The actual contact area between the end plates and the beam sides did not meet the safety requirements for the attached cantilever scaffolding. To solve this problem, the reinforcement connection structure and reinforcement method described in any one of Embodiments 1-6 were used. After the reinforcement connection structure was installed, the attached cantilever scaffolding was in good stress condition, and the overall stability of the scaffolding met the construction safety requirements. After passing on-site acceptance, it was put into normal use. After construction, the L-shaped connection reinforcement components could be removed entirely by unbolting the bolts and transferred to other beams with insufficient height for repeated installation and reuse, realizing the recycling of reinforcement components. This embodiment verifies the feasibility and reliability of the reinforcement connection structure and treatment method described in this invention, and has the conditions for widespread application in similar projects.

Claims

1. A reinforcement connection structure for situations where the height of an attached cantilevered scaffold beam is insufficient, wherein the attached cantilevered I-beam is connected to the side of a concrete beam via an end plate; the vertical height of the end plate is greater than the cross-sectional height of the concrete beam; the lower part of the end plate is exposed below the bottom surface of the concrete beam; characterized in that: The reinforced connection structure includes an L-shaped connection reinforcement member (1), an anchor member (2), and a connector (3); The L-shaped connecting reinforcement (1) includes a horizontal wing plate and a vertical wing plate that are perpendicular to each other; the horizontal wing plate is located below the bottom surface of the concrete beam and is in contact with the bottom surface of the concrete beam; the vertical wing plate is located on one side of the exposed area of ​​the end plate and is in contact with the exposed area of ​​the end plate; a reinforcing plate is provided between the horizontal wing plate and the vertical wing plate; the reinforcing plate is fixedly connected to the two wing plates; bolt holes are provided on both the horizontal wing plate and the vertical wing plate. The anchor passes through the bolt holes on the horizontal wing plate to anchor the horizontal wing plate to the bottom of the concrete beam; the connector passes through the bolt holes on the vertical wing plate to fasten the vertical wing plate to the exposed area of ​​the end plate; the anchoring of the L-shaped connecting reinforcement (1) to the bottom of the beam and the fastening to the end plate form a complete load transfer path in the exposed area of ​​the end plate, so that the cantilever frame remains stable under the condition of insufficient beam height.

2. The reinforcement connection structure for insufficient height of the attached cantilever external scaffold beam as described in claim 1, characterized in that: The L-shaped connecting reinforcement (1) is welded from a 12mm thick Q235 steel plate; the rib plate is a 10mm thick Q235 steel plate.

3. The reinforcement connection structure for insufficient height of the attached cantilever external scaffold beam as described in claim 1, characterized in that: The vertical wing plate has one bolt hole; the horizontal wing plate has two bolt holes, each bolt hole being 22mm wide and not less than 50mm long.

4. The reinforcement connection structure for insufficient height of the attached cantilever external scaffold beam as described in claim 1, characterized in that: The anchor (2) is an A8.8 grade M20 semi-embedded high-strength bolt, equipped with a washer with a specification of 80mm×80mm×10mm, and is fixed by a double bolt.

5. The reinforcement connection structure for insufficient height of the attached cantilever external scaffold beam as described in claim 1, characterized in that: The connector (3) is an M20 bolt, equipped with a washer with a specification of 80mm×80mm×10mm, and is fixed by a double bolt.

6. A reinforcement method for insufficient height of attached cantilevered external scaffold beams, characterized in that, The reinforcement treatment is carried out using the reinforcement connection structure described in any one of claims 1 to 5 according to the following steps: S1) Install and align the attached cantilevered I-beam end plate with the concrete beam to complete the initial fixing; S2) Place the L-shaped connecting reinforcement (1) on the lower part of the end plate, which is exposed below the bottom surface of the concrete beam; adjust the L-shaped connecting reinforcement (1) so that the horizontal flange is flush with the bottom surface of the concrete beam and the vertical flange is in close contact with the exposed area of ​​the I-beam end plate; anchor the L-shaped connecting reinforcement (1) to the bottom of the concrete beam by passing the anchor (2) through the bolt holes on the horizontal flange. S3) The L-shaped connecting reinforcement (1) is fastened to the exposed area of ​​the I-beam end plate by passing the connecting piece (3) through the bolt hole on the vertical wing plate; S4) For each part with insufficient beam height, repeat steps S2) to S3) one by one to complete the reinforcement installation of each point until all exposed end plates are reliably connected to the concrete beam through L-shaped connecting reinforcement (1).

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