Fixing device and assembly of fiber cement board disassembly-free bottom die steel bar truss and construction method

Abstract

The invention relates to the technical field of building construction, in particular to a fixing device and assembly of a fiber cement board disassembly-free bottom die steel bar truss and a construction method.The device comprises a metal embedded plate embedded in a fiber cement board, the embedded plate is provided with an arc-shaped base for bearing the steel bar truss, and the base is connected with an arc-shaped cover plate through a hinge; the fixing buckle at the free end of the cover plate is elastically clamped with the buckle pressing plate of the base to form a closed space for fixing the steel bar truss, anti-sliding structures are arranged on the inner walls of the base and the cover plate, the embedded plate is provided with a structure for enhancing anchoring force, and the base and the embedded plate can be connected in a welded, riveted or bolted mode. During construction, the embedded plate is pre-embedded, the cover plate is rotated after the steel bar truss is placed, and the buckle pressing plate is pressed to complete locking. The device is simple in structure, convenient to install, free of fire operation and punching, capable of achieving rapid and accurate positioning and firm fixing of the steel bar truss, tightly combined with the fiber cement board, free of damage to the bottom die, good in adaptability and practicability, capable of effectively improving the construction efficiency and the structural safety and capable of reducing the construction cost.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a fixing device, component, and construction method for a fiber cement board bottom formwork steel truss that does not require removal. Background Technology

[0002] Fiber cement boards are widely used in the construction of prefabricated buildings without the need for formwork removal due to their high strength, fire resistance, water resistance, and durability. The reliable connection between the steel truss and the fiber cement board formwork is a key link in ensuring the overall stability and construction safety of prefabricated floor slabs, walls, and other structures.

[0003] Currently, in the construction of fiber cement board formwork for non-removable installation and the fixing of steel trusses, traditional fixing methods mostly involve welding, tying with steel wire, or direct bolt fixing. Welding not only requires on-site hot work, which is greatly restricted by the construction environment, but also easily causes heat damage to the fiber cement board, reducing the structural performance of the formwork. Tying with steel wire is cumbersome, has low construction efficiency, and the binding firmness is difficult to guarantee. During subsequent concrete pouring and vibration, the steel truss is prone to displacement and loosening, affecting the structural positioning accuracy. Bolt fixing requires pre-drilling holes in the fiber cement board, which not only damages the integrity of the formwork but also increases the construction process. Furthermore, bolted connections have poor disassembly and assembly flexibility, which is not conducive to adjustments and rework during construction. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a simple, easy-to-install, and reliable fixing device, component, and construction method for fiber cement board bottom formwork steel trusses that do not require dismantling.

[0005] The technical solution adopted by this invention to solve its technical problem is: A fixing device for a fiber cement board bottom formwork-free steel truss includes an embedded plate pre-embedded in the fiber cement board; an arc-shaped base is fixedly installed on the embedded plate, the arc-shaped base is used to support the steel truss, and an arc-shaped cover plate is rotatably connected to one side of the arc-shaped base via a hinge, the arc-shaped cover plate can be rotated to cover the arc-shaped base, thereby forming a closed space together with the arc-shaped base to accommodate and fix the steel truss; a fixing buckle is provided at the free end of the arc-shaped cover plate, and a buckle pressing plate is provided at the corresponding position of the arc-shaped base and the fixing buckle for locking with the fixing buckle.

[0006] As a preferred embodiment, a further technical solution of the present invention is: Preferably, at least one of the fixing buckle and the buckle pressing plate adopts an elastic member, thereby achieving locking through elastic snap-fit.

[0007] Preferably, the inner wall surface of the arc-shaped base and / or arc-shaped cover plate is provided with an anti-slip structure.

[0008] Preferably, the anti-slip structure is a textured surface or an anti-slip rubber layer.

[0009] Preferably, the embedded plate is made of metal plate, and the surface is provided with holes, protrusions or bending structures to enhance the anchoring force with the fiber cement board.

[0010] Preferably, the arc-shaped base and the embedded plate are assembled by detachable connection through welding, riveting or bolting.

[0011] This invention also discloses an assembly for a fiber cement board bottom formwork-free steel truss, including a fiber cement board and at least one of the above-mentioned fixing devices, wherein the embedded plate in the fixing device is pre-embedded in the fiber cement board.

[0012] This invention also discloses a construction method for a fiber cement board bottom formwork steel truss that does not require removal, using the aforementioned fixing device. The specific steps are as follows: S1: The mounting plate of the fixing device is pre-embedded in the fiber cement board; S2: Place the steel truss on the curved base; S3: Rotate the arc-shaped cover plate to cover the steel truss and arc-shaped base; S4: Press the buckle pressing plate to lock the buckle pressing plate and the fixing buckle together, thus completing the fixing.

[0013] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: Easy to install and highly efficient in construction: The device uses hinges to rotate and open the arc-shaped cover plate. After the steel truss is placed, simply rotate the cover plate and press the buckle to lock and fix it. No open flame, binding or drilling is required throughout the process. The operation steps are simple, which greatly shortens the construction time, reduces the operation requirements of construction personnel, and improves the overall construction efficiency. Reliable connection and strong structural stability: The arc-shaped base and arc-shaped cover plate work together to form a closed space, which can fully wrap and support the steel truss. The anti-slip structure of the inner wall further enhances the gripping force on the steel truss, effectively preventing it from shifting or loosening during construction. At the same time, the elastic snap-fit ​​structure of the fixing buckle and the buckle pressing plate has a good locking effect, which can ensure the firmness of the connection and improve the overall structural stability and construction safety after the fiber cement board non-removable bottom formwork is connected to the steel truss. Tightly bonded to fiber cement board with no structural damage: The device is bonded to the fiber cement board through a pre-embedded metal plate. The holes, protrusions or bending structures on the surface of the plate greatly enhance the anchoring force and adhesion to the fiber cement board, making the device and the bottom mold a solid whole that is not easy to fall off under stress. Moreover, the pre-embedding method does not require additional drilling in the fiber cement board, avoiding damage to the bottom mold structure and ensuring the integrity and original performance of the fiber cement board. Simple structure, reasonable material selection, and controllable cost: The device has few overall components, a compact design, and is easy to mass-produce; the main components can be made of metal materials, which have high strength and good durability, can meet the stress requirements of building construction, and the processing and manufacturing cost of metal components is controllable; Overall improvement in construction quality: The device enables rapid and accurate positioning of steel trusses, effectively ensuring the installation accuracy of the steel trusses and avoiding subsequent concrete structure construction quality problems caused by displacement. It improves the construction quality of prefabricated buildings from the source. At the same time, the reliable connection between the bottom formwork and the steel truss without dismantling also ensures the smooth progress of subsequent concrete pouring, vibration and other processes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the component structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the fixing device in an embodiment of the present invention; Figure 3 This is a three-dimensional schematic diagram of the component structure in an embodiment of the present invention.

[0015] Explanation of reference numerals in the attached diagram: 1. Hinge; 2. Fixing buckle; 3. Buckle pressing plate; 4. Arc-shaped base; 5. Fiber cement board; 6. Arc-shaped cover plate; 7. Embedded plate. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0017] like Figure 2 As shown in the figure, this embodiment provides a fixing device for a fiber cement board bottom formwork steel truss without dismantling, including an embedded plate 7 pre-embedded in the fiber cement board 5; an arc-shaped base 4 is fixedly installed on the embedded plate 7, the arc-shaped base 4 is used to support the steel truss, and an arc-shaped cover plate 6 is rotatably connected to one side of the arc-shaped base 4 through a hinge 1. The arc-shaped cover plate 6 can be rotated to cover the arc-shaped base 4, thereby forming a closed space together with the arc-shaped base 4 to accommodate and fix the steel truss; a fixing buckle 2 is provided at the free end of the arc-shaped cover plate 6, and a buckle pressing plate 3 is provided at the corresponding position of the arc-shaped base 4 and the fixing buckle 2 for locking with the fixing buckle 2.

[0018] In practice, at least one of the fixing buckle 2 and the buckle pressing plate 3 adopts an elastic component, thereby achieving locking through elastic snap-fit, having a certain elastic deformation capacity, and facilitating fastening and disassembly.

[0019] The inner wall surface of the arc-shaped base 4 and / or the arc-shaped cover plate 6 is provided with an anti-slip structure; the anti-slip structure is a textured surface or an anti-slip rubber layer to enhance the grip on the steel truss.

[0020] The embedded plate 7 is made of metal plate, and its surface is provided with holes, protrusions or bending structures to enhance the anchoring force with the fiber cement board 5.

[0021] The arc-shaped base 4 and the embedded plate are detachably connected by welding, riveting or bolts to achieve assembly.

[0022] Hinge 1 is a movable hinge, allowing the arc-shaped cover plate 6 to be fully opened toward the outside of the arc-shaped base 4.

[0023] The fixing device is made entirely of metal, or the arc-shaped base 4 and the arc-shaped cover plate 6 are made of metal.

[0024] like Figure 1 and 3 As shown, this embodiment of the invention also provides an assembly of a fiber cement board bottom formwork steel truss that does not require dismantling, including a fiber cement board and at least one of the above-mentioned fixing devices, wherein the embedded plate in the fixing device is pre-embedded in the fiber cement board.

[0025] This invention also provides a construction method for a fiber cement board bottom formwork steel truss that does not require removal, using the aforementioned fixing device. The specific steps are as follows: S1: The mounting plate of the fixing device is pre-embedded in the fiber cement board; S2: Place the steel truss on the curved base; S3: Rotate the arc-shaped cover plate to cover the steel truss and arc-shaped base; S4: Press the buckle pressing plate to lock the buckle pressing plate and the fixing buckle together, thus completing the fixing.

[0026] The technical solution of this invention is easy to install and has high construction efficiency: the device realizes the rotation and opening of the arc-shaped cover plate through the hinge. After the steel truss is placed, it is only necessary to rotate the cover plate and press the buckle pressing plate to complete the locking and fixing. No open flame, binding or drilling work is required throughout the process. The operation steps are simple, which greatly shortens the construction time, reduces the operation requirements of construction personnel, and improves the overall construction efficiency. Reliable connection and strong structural stability: The arc-shaped base and arc-shaped cover plate work together to form a closed space, which can fully wrap and support the steel truss. The anti-slip structure of the inner wall further enhances the gripping force on the steel truss, effectively preventing it from shifting or loosening during construction. At the same time, the elastic snap-fit ​​structure of the fixing buckle and the buckle pressing plate has a good locking effect, which can ensure the firmness of the connection and improve the overall structural stability and construction safety after the fiber cement board non-removable bottom formwork is connected to the steel truss. Tightly bonded to fiber cement board with no structural damage: The device is bonded to the fiber cement board through a pre-embedded metal plate. The holes, protrusions or bending structures on the surface of the plate greatly enhance the anchoring force and adhesion to the fiber cement board, making the device and the bottom mold a solid whole that is not easy to fall off under stress. Moreover, the pre-embedding method does not require additional drilling in the fiber cement board, avoiding damage to the bottom mold structure and ensuring the integrity and original performance of the fiber cement board. Simple structure, reasonable material selection, and controllable cost: The device has few overall components, a compact design, and is easy to mass-produce; the main components can be made of metal materials, which have high strength and good durability, can meet the stress requirements of building construction, and the processing and manufacturing cost of metal components is controllable; Overall improvement in construction quality: The device enables rapid and accurate positioning of steel trusses, effectively ensuring the installation accuracy of the steel trusses and avoiding subsequent concrete structure construction quality problems caused by displacement. It improves the construction quality of prefabricated buildings from the source. At the same time, the reliable connection between the bottom formwork and the steel truss without dismantling also ensures the smooth progress of subsequent concrete pouring, vibration and other processes.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A fixing device for a fiber cement board bottom formwork steel truss that does not require dismantling, characterized in that, Includes an embedded plate (7) pre-embedded in fiber cement board (5); an arc-shaped base (4) is fixedly installed on the embedded plate (7), the arc-shaped base (4) is used to support the steel truss, and an arc-shaped cover plate (6) is rotatably connected to one side of the arc-shaped base (4) through a hinge (1). The arc-shaped cover plate (6) can rotate to cover the arc-shaped base (4), thereby forming a closed space together with the arc-shaped base (4) to accommodate and fix the steel truss; a fixing buckle (2) is provided at the free end of the arc-shaped cover plate (6), and a buckle pressing plate (3) is provided at the corresponding position of the arc-shaped base (4) and the fixing buckle (2) for locking with the fixing buckle (2).

2. The fixing device for the fiber cement board bottom formwork steel truss according to claim 1, characterized in that, At least one of the fixing buckle (2) and the buckle pressing plate (3) adopts an elastic member, thereby achieving locking through elastic snap-fit.

3. The fixing device for the fiber cement board bottom formwork steel truss according to claim 1, characterized in that, The inner wall surfaces of the arc-shaped base (4) and / or the arc-shaped cover plate (6) are provided with anti-slip structures.

4. The fixing device for the fiber cement board bottom formwork steel truss according to claim 3, characterized in that, The anti-slip structure consists of textured surfaces or an anti-slip rubber layer.

5. The fixing device for the fiber cement board bottom formwork steel truss according to claim 1, characterized in that, The embedded plate (7) is made of metal plate and has holes, protrusions or bends on its surface to enhance the anchoring force with the fiber cement board (5).

6. The fixing device for the fiber cement board bottom formwork steel truss according to claim 1, characterized in that, The arc-shaped base (4) and the embedded plate are detachably connected by welding, riveting or bolts to achieve assembly.

7. A component for a fiber cement board formwork-free steel truss, characterized in that, It includes a fiber cement board (5) and at least one fixing device as described in any one of claims 1-6, wherein the embedded plate (7) of the fixing device is pre-embedded in the fiber cement board.

8. A construction method for a fiber cement board bottom formwork steel truss without the need for formwork removal, characterized in that, The fixing device described in any one of claims 1 to 6 is used, and the specific steps are as follows: S1: The mounting plate (7) of the fixing device is pre-embedded in the fiber cement board (5); S2: Place the steel truss on the arc-shaped base (4); S3: Rotate the arc-shaped cover plate (6) to cover the steel truss and the arc-shaped base (4); S4: Press the buckle pressing plate (3) to lock the buckle pressing plate (3) and the fixing buckle (2) to complete the fixing.

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