A lath and construction column integrated composite connecting device and a construction method thereof

Abstract

A kind of strip and construction column integrated composite connecting device and its construction method, comprising: U type card body, for being engaged in the side of lightweight concrete strip, long round hole is set up on its web;Hinged seat is fixedly arranged on the outer wall of the U type card body;Bolt head is slidably arranged in the long round hole, its stem is connected with the hinged seat, to realize angle adjustment;Self-locking locknut is connected to the stem end of the bolt;Anchor round steel, one end is rigidly connected with the hinged seat, the other end is used to be fixedly connected with the vertical reinforcement of construction column.Structure is simple and convenient to operate, connection node uplift bearing capacity and the overall seismic stability of wall;Construction column is once cast in the regular cavity formed by strip, its perpendicularity and flatness are effectively guaranteed, eliminate later repair, construction efficiency is high and wall quality is good.

Description

Technical Field

[0001] This application belongs to the field of building construction technology, and in particular relates to an integrated composite connection device for strip panels and structural columns and its construction method. Background Technology

[0002] In the construction of lightweight concrete panel walls, to meet building code requirements and improve the integrity, stability, and seismic performance of the walls, reinforced concrete structural columns must be installed at regular intervals along the wall direction. Traditional construction methods follow a fixed sequence: first, the reinforcing steel frame for the structural columns is tied at predetermined locations; then, formwork is erected, concrete for the structural columns is poured into the formwork, and the formwork is removed only after the concrete has cured to the specified strength. Finally, U-shaped clips and other connectors are used to fix the structural columns to the sides using nail guns, and then the lightweight panels are installed.

[0003] However, this traditional process has revealed many insurmountable defects in practical applications. First, the rigid sequence of procedures means that the installation of lightweight panels must wait until the concrete of the structural columns reaches sufficient strength, resulting in a long technical interval between the two main processes and significantly extending the overall construction period of the wall. Second, the structural columns themselves typically have small cross-sectional dimensions, limiting the operational space for formwork and making formwork difficult. After casting, the structural columns often exhibit large vertical deviations and poor surface flatness, requiring subsequent chiseling and repairs. This not only increases workload but also directly affects the installation accuracy and quality of the lightweight panels connected to them. Third, the U-shaped clips used to connect the panels to the structural columns are mostly fixed with nails. The anchoring force of these nails in the concrete is limited, especially under cyclic loads or vibrations. Their reliability, pull-out resistance, and seismic performance are insufficient, and they risk loosening or even detachment after long-term use. Finally, the entire traditional process involves a large investment in formwork, numerous construction steps, and high labor costs and material waste.

[0004] To address the aforementioned issues, the existing technology lacks a dedicated connection device and supporting construction method that can enable reverse construction by first installing the panel and then pouring the structural column, and can provide reliable connection, simplify the formwork process, and improve the overall performance of the wall. Summary of the Invention

[0005] This application provides an integrated composite connection device for strip panels and structural columns and its construction method, aiming to solve the problems of solidification of structural columns and strip panels, poor connection reliability and low construction efficiency in the construction of traditional lightweight strip panel walls.

[0006] To solve at least one of the above-mentioned technical problems, the technical solution adopted in this application is:

[0007] An integrated composite connection device for strip panels and structural columns includes:

[0008] The U-shaped clip is used to engage with the side of the lightweight concrete slab, and an elongated hole is provided on its web.

[0009] A hinged seat is fixedly mounted on the outer wall of the U-shaped card body;

[0010] A bolt, the head of which is slidably inserted into the elongated hole, and the shank of which is connected to the hinge seat to achieve angle adjustment;

[0011] A self-locking anti-loosening nut is attached to the end of the shank of the bolt;

[0012] Anchor round steel, one end of which is rigidly connected to the hinge seat, and the other end is used to fix it to the vertical reinforcing bar of the structural column.

[0013] Furthermore, the surface of the U-shaped card body connected to the hinge seat is provided with at least one anti-slip tooth pattern; wherein, there are two anti-slip teeth, with a tooth depth of 1.0-2.0 mm and a tooth pitch of 4-6 mm.

[0014] Furthermore, a disc spring washer is provided between the self-locking anti-loosening nut and the side wall of the U-shaped clip away from the hinge seat.

[0015] Furthermore, the free end of the anchoring round steel is provided with a hook.

[0016] Furthermore, a sealing gasket layer for preventing grout leakage during concrete pouring is also affixed to the side wall of the U-shaped clip body that contacts the hinge seat; the sealing gasket layer is a closed-cell foam strip with a thickness of 3mm.

[0017] Furthermore, the U-shaped card body is formed by stamping steel plate with a thickness of 1.5-2.5mm, and its surface has a galvanized anti-corrosion layer.

[0018] Furthermore, the diameter of the anchoring round steel is Φ6-Φ10mm, and the length is 100-150mm.

[0019] Furthermore, the distance between two adjacent connecting devices is no more than 600mm, and the number of connecting devices provided on a single strip is no less than two.

[0020] Furthermore, in the vertical direction, the connecting devices located at the top and bottom are both 100mm away from the upper and lower ends of the strip.

[0021] A method for constructing the connection device as described above includes the following steps:

[0022] S1. Mark the position with a chalk line and tie the vertical steel bars and stirrups of the structural column;

[0023] S2. Install the lightweight concrete strip on one side of the structural column and correct its verticality;

[0024] S3. Secure the U-shaped clamp of the connecting device to the side of the installed strip, adjust the position of the bolt through the elongated hole on the web of the U-shaped clamp, and rotate the hinge seat to align the anchoring round steel with the vertical reinforcing bar of the structural column.

[0025] S4. Tighten the self-locking anti-loosening nut and tie the anchoring round steel to the vertical steel bar of the structural column;

[0026] S5. Set multiple connecting devices with a vertical spacing of no more than 600mm to ensure that the number of connecting devices on a single strip is no less than 2, and set one connecting device at the upper end of the strip and at the lower end of the strip within 100mm from the end face.

[0027] S6. Install the lightweight concrete strip on the other side of the structural column, and fix the connecting device on the other side according to steps three to five, so that the casting cavity of the structural column is formed between the two strips.

[0028] S7. Seal the junction of the strip and the structural column, and close the formwork at both ends of the structural column. Then pour concrete into the pouring cavity in layers, with each layer not exceeding 500mm in height.

[0029] S8. After the concrete has cured to the design strength, remove the end face formwork to complete the construction.

[0030] This application presents an integrated composite connection device and construction method for strip panels and structural columns. By adopting a reverse process of first installing the strip panels and then pouring the structural columns, and using the strip panels as side formwork, the curing time for the structural columns is eliminated, the amount of formwork used is reduced, and the formwork operation is simplified. With the help of adjustable and self-locking anchoring connections, reliable mechanical anchoring of the strip panels and structural column reinforcement is achieved, which significantly improves the pull-out bearing capacity of the connection nodes and the overall seismic stability of the wall. At the same time, the structural columns are cast in one go within the regular cavity formed by the strip panels, and their verticality and flatness are effectively guaranteed, eliminating the need for later chiseling and repair. This comprehensively improves construction efficiency and wall quality, and reduces construction noise and dust by eliminating the use of nail connections, achieving a safe and environmentally friendly construction effect. Attached Figure Description

[0031] Figure 1 This is a top view of the connecting device in this application;

[0032] Figure 2 This is a side view of the connecting device in this application;

[0033] Figure 3This is a schematic diagram of a partial connection node of the connecting device in this application.

[0034] In the diagram: 1. U-shaped clip; 2. Sealing gasket; 3. Bolt; 4. Decorative surface; 5. Fiber mesh; 6. Structural column; 7. Strip; 8. Self-locking anti-loosening nut; 9. Anchoring round steel; 10. Concrete structure; 11. Oblong hole. Detailed Implementation

[0035] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] This embodiment proposes an integrated composite connection device for strip panels and structural columns, such as... Figure 1 , Figure 2 As shown, it mainly includes a U-shaped clamp 1, a hinge seat, a T-shaped bolt 3, a self-locking anti-loosening nut 8, and an anchoring round steel 9. The U-shaped clamp 1 engages with the side of the lightweight concrete slab 7, and its web has an elongated hole 11 along its horizontal direction (e.g., ...). Figure 3 (As shown in the diagram). The hinge seat is fixedly installed on the outer wall of the U-shaped clamp 1. The head of the bolt 3 is slidably inserted into the elongated hole 11, and its shank passes through the hinge seat. The self-locking anti-loosening nut 8 is screwed onto the end of the shank, thereby pressing the hinge seat against the outer wall of the U-shaped clamp 1. By loosening the self-locking anti-loosening nut 8, the head of the bolt 3 can slide along the elongated hole 11 and the hinge seat can be rotated to adjust the connection angle. One end of the anchoring round steel 9 is rigidly connected to the hinge seat, and the other end is used to fix it to the vertical reinforcing bar of the structural column 6. Overall, this device, through the adjustable and sliding bolt 3 and the hinge seat, achieves flexible alignment and rigid anchoring between the U-shaped clamp 1 and the reinforcing bar of the structural column 6, ensuring connection reliability and adapting to on-site installation deviations.

[0037] At least one anti-slip serration, preferably two, is provided on the inner surface of the U-shaped clamp 1 on the side connecting to the hinge seat (i.e., the engagement surface in contact with the side of the strip). The tooth depth is controlled at 1.0-2.0 mm, and the tooth pitch is 4-6 mm. This anti-slip serration is directly pressed against the side of the lightweight concrete strip 7. When the U-shaped clamp 1 is engaged, the serration is embedded in the surface of the strip, significantly increasing the friction and preventing the clamp from slipping under stress or vibration. This effectively improves the anti-slip capability between the U-shaped clamp 1 and the strip 7, ensuring that the connection device remains stable under long-term use and seismic action, and preventing loosening.

[0038] In a preferred embodiment, the exposed side surface of the panel 7 is the decorative surface 4. After the panel is installed, this side surface no longer needs to be additionally smoothed or leveled and can be directly used as a decorative layer. To enhance the crack resistance of the wall surface, a layer of fiber mesh 5 can be laid across the area between the two U-shaped clips 1 in the decorative surface 4. This mesh is usually fixed to the decorative surface of the panel with adhesive mortar and covers the U-shaped clips 1.

[0039] A disc spring washer is added between the self-locking anti-loosening nut 8 and the side wall of the U-shaped clamp 1 away from the hinge seat. During assembly, the self-locking anti-loosening nut 8 compresses the disc spring washer after tightening, generating a continuous elastic restoring force. This elastic force acts in the opposite direction on the threaded joint of the self-locking anti-loosening nut 8, automatically compensating for bolt preload loosening caused by concrete shrinkage, temperature changes, or vibration. The disc spring washer and the self-locking anti-loosening nut 8 work together to form a dual anti-loosening mechanism, significantly improving the vibration and anti-loosening performance of the connection joint under dynamic loads and ensuring the reliability of the long-term connection.

[0040] The free end of the anchor round steel 9 (i.e., the end not connected to the hinge seat) is equipped with a hook, with a bending angle typically of 135°. This hook is used for binding or hooking the vertical reinforcement of the structural column 6. The hook structure greatly enhances the mechanical interlocking and anchoring capacity between the anchor round steel and the structural column reinforcement, preventing relative slippage during concrete pouring or under stress, thereby reliably transferring the load on the strip to the structural column reinforcement cage.

[0041] A sealing gasket 2, made of 3mm thick closed-cell foam strip, is adhered to the side wall of the U-shaped clamp 1 that contacts the hinge seat (i.e., the side of the U-shaped clamp 1 facing the cavity of the structural column 6). When the U-shaped clamp 1 clamps the strip, the sealing gasket 2 is compressed and filled into the gaps between the U-shaped clamp 1 and the side of the strip 7, as well as between the U-shaped clamp 1 and the end face template of the structural column 6. During subsequent pouring of the structural column concrete, this effectively prevents cement grout from leaking out of the gaps, avoiding wall contamination, material waste, and quality defects caused by grout leakage, while ensuring the structural column is densely formed.

[0042] The U-shaped clamp body 1 is made of Q235B steel plate with a thickness of 1.5-2.5mm, formed by stamping, and the surface is galvanized for corrosion protection. This thickness range ensures that the clamp body has sufficient structural strength and resistance to deformation, while the galvanized layer makes it resistant to rust in humid or alkaline concrete environments. This ensures that the connecting device maintains its mechanical properties and durability during long-term service, extending its service life and reducing maintenance costs.

[0043] The diameter of the anchoring round steel bar 9 is selected from Φ6-Φ10mm, and the length is controlled between 100-150mm. This size range takes into account both compatibility with commonly used structural column reinforcement (usually Φ10-Φ14mm) and sufficient anchorage length. This design provides sufficient pull-out bearing capacity while avoiding installation difficulties or material waste caused by excessively thick or long round steel bars, achieving a balance between economy and reliability.

[0044] like Figure 2As shown, concrete structures 10 are provided above and below the structural column 6 along the vertical direction of the strip 7; the center-to-center distance between two adjacent connecting devices is no more than 600mm, and the total number of connecting devices on a single strip is no less than two. This provision is based on seismic design codes and installation experience of the strip 7. This ensures that there are sufficient constraint points along the height direction between the strip 7 and the structural column 6, effectively controlling the deformation of the strip 7 under lateral forces, ensuring that the overall integrity of the wall meets seismic requirements, and preventing local instability.

[0045] In the vertical direction, the uppermost connecting device is 100mm from the top surface of panel 7, and the lowermost connecting device is also 100mm from the bottom surface of panel 7. This position avoids the vulnerable area at the end of panel 7, while being close to the area where the panel end is subjected to greater stress; this arrangement can further strengthen the connection rigidity between the panel end and the structural column, preventing the panel end from warping or cracking under load, and is especially crucial for the fixation of the top of the wall and the bottom of the beam slab.

[0046] A method for constructing the connection device as described above, characterized by comprising the following steps:

[0047] S1. Mark the location with chalk lines and tie the vertical steel bars and stirrups of the structural column.

[0048] S2. Install the lightweight concrete strip 7 on one side of the structural column 6 and correct its verticality.

[0049] S3. Secure the U-shaped clamp 1 of the connecting device to the side of the installed strip 7, adjust the position of the bolt 3 through the elongated hole 11 on the web of the U-shaped clamp 1, and rotate the hinge seat to align the anchoring round steel 9 with the vertical reinforcing bar of the structural column 6.

[0050] S4. Tighten the self-locking anti-loosening nut 8 and tie the anchoring round steel 9 to the vertical steel bar of the structural column 6.

[0051] S5. Set multiple connecting devices with a vertical spacing of no more than 600mm to ensure that there are no less than 2 connecting devices on a single strip 7, and set one connecting device at the upper end of the strip 7 and at the lower end of the strip 7 within 100mm from the end face.

[0052] S6. Install the lightweight concrete strip 7 on the other side of the structural column 6, and fix the connecting device on the other side according to steps S3-S5, so that the casting cavity of the structural column 6 is formed between the two strips 7.

[0053] S7. The junction of the strip 7 and the structural column 6 is sealed with a sealing gasket 2, and the front and rear end faces of the structural column 6 are closed. Then, concrete is poured into the pouring cavity in layers, with each layer not exceeding 500mm in height, and the distance between the vibrator and the inner wall of the strip 7 is not less than 100mm.

[0054] S8. After the concrete has cured to the design strength, remove the end face formwork to complete the construction.

[0055] The integrated composite connection device for strip panels and structural columns designed in this application completely eliminates the waiting period for the concrete strength of the structural columns by realizing the reverse construction process of first installing the strip panels and then pouring the structural columns. This shortens the overall construction period by more than 30%. At the same time, by using the strip panels themselves as lateral formwork for the structural columns, the amount of formwork used is reduced by more than 50%, which greatly reduces the difficulty and cost of formwork support.

[0056] Meanwhile, by adopting a composite connection device with anti-slip teeth, adjustable hinge angle and self-locking anti-loosening structure, a firm mechanical anchorage between the strip and the structural column reinforcement is achieved. Its joint pull-out force can reach more than 3.0kN, which can meet the seismic fortification requirements of 8 degrees and significantly improve the reliability of the connection and the overall stability of the wall.

[0057] Furthermore, since the structural columns can be cast within the regular cavities formed by the slabs, their verticality and flatness after forming are fundamentally guaranteed. This eliminates the secondary chiseling and repair work that is indispensable in traditional processes, resulting in a first-time acceptance rate of no less than 98% for the walls. While comprehensively improving construction quality and efficiency, it also eliminates nail shooting operations, reduces noise and dust pollution, and achieves safe, environmentally friendly, and efficient building construction.

[0058] By adopting a reverse process of first installing the strip panels and then pouring the structural columns, and using the strip panels as side formwork, the curing time for the structural columns is eliminated, the amount of formwork used is reduced, and the formwork operation is simplified. Combined with adjustable, self-locking anchoring connections, reliable mechanical anchoring of the strip panels and structural column reinforcement is achieved, significantly improving the pull-out bearing capacity of the connection joints and the overall seismic stability of the wall. Simultaneously, the structural columns are cast in one piece within the regular cavity formed by the strip panels, effectively ensuring their verticality (deviation ≤3mm) and flatness, eliminating the need for later chiseling and repair. This comprehensively improves construction efficiency and wall quality, and by eliminating the need for nail connections, construction noise and dust are reduced, achieving a safe and environmentally friendly construction effect. This application also proposes a construction method for an integrated composite connection device for strip panels and structural columns.

[0059] The embodiments of this application have been described in detail above. These descriptions are merely preferred embodiments and should not be construed as limiting the scope of this application. All equivalent variations and modifications made within the scope of this application should still fall within the patent coverage of this application.

Claims

1. A composite connection device for strip panels and structural columns, characterized in that, include: The U-shaped clip is used to engage with the side of the lightweight concrete slab, and an elongated hole is provided on its web. A hinged seat is fixedly mounted on the outer wall of the U-shaped card body; A bolt, the head of which is slidably inserted into the elongated hole, and the shank of which is connected to the hinge seat to achieve angle adjustment; A self-locking anti-loosening nut is attached to the end of the shank of the bolt; Anchor round steel, one end of which is rigidly connected to the hinge seat, and the other end is used to fix it to the vertical reinforcing bar of the structural column.

2. The connecting device according to claim 1, characterized in that, The U-shaped card body has at least one anti-slip tooth pattern on the surface of the side connected to the hinge seat; wherein, there are two anti-slip teeth, with a tooth depth of 1.0-2.0 mm and a tooth pitch of 4-6 mm.

3. The connecting device according to claim 1 or 2, characterized in that, A disc spring washer is also provided between the self-locking anti-loosening nut and the side wall of the U-shaped clamp body away from the hinge seat.

4. The connecting device according to claim 3, characterized in that, The free end of the anchoring round steel is provided with a hook.

5. The connecting device according to any one of claims 1-2 and 4, characterized in that, A sealing gasket layer for preventing grout leakage during concrete pouring is also attached to the side wall of the U-shaped clip that contacts the hinge seat; the sealing gasket layer is a closed-cell foam strip with a thickness of 3mm.

6. The integrated composite connection device for strip panels and structural columns according to claim 1, characterized in that, The U-shaped card body is formed by stamping steel plate with a thickness of 1.5-2.5mm, and its surface has a galvanized anti-corrosion layer.

7. The connecting device according to claim 6, characterized in that, The diameter of the anchoring round steel is Φ6-Φ10mm, and the length is 100-150mm.

8. The connecting device according to any one of claims 1-2, 4, 6-7, characterized in that, The distance between two adjacent connecting devices shall not exceed 600mm, and the number of connecting devices provided on a single strip shall not be less than two.

9. The connecting device according to claim 8, characterized in that, In the vertical direction, the connecting devices located at the top and bottom are both 100mm away from the upper and lower ends of the strip.

10. A construction method for the connecting device as described in claims 1-9, characterized in that, Includes the following steps: S1. Mark the position with a chalk line and tie the vertical steel bars and stirrups of the structural column; S2. Install the lightweight concrete strip on one side of the structural column and correct its verticality; S3. Secure the U-shaped clamp of the connecting device to the side of the installed strip, adjust the position of the bolt through the elongated hole on the web of the U-shaped clamp, and rotate the hinge seat to align the anchoring round steel with the vertical reinforcing bar of the structural column. S4. Tighten the self-locking anti-loosening nut and tie the anchoring round steel to the vertical steel bar of the structural column; S5. Set multiple connecting devices with a vertical spacing of no more than 600mm to ensure that the number of connecting devices on a single strip is no less than 2, and set one connecting device in the upper 100mm range and one in the lower 100mm range of the strip. S6. Install the lightweight concrete strip on the other side of the structural column, and fix the connecting device on the other side according to steps three to five, so that the casting cavity of the structural column is formed between the two strips. S7. Seal the junction of the strip and the structural column, and close the formwork at both ends of the structural column. Then pour concrete into the pouring cavity in layers, with each layer not exceeding 500mm in height, and the distance between the vibrator and the inner wall of the strip not less than 100mm. S8. After the concrete has cured to the design strength, remove the end face formwork to complete the construction.

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