A fixing device for a prefabricated building cast-in-place beam-column formwork

Abstract

This utility model relates to the field of prefabricated building technology, and in particular to a fixing device for precast beam templates in prefabricated buildings. The fixing device is used to fix the templates on both sides of the main precast beam. The templates abut against the side walls of the secondary precast beams along their length, and the top of the template abuts against the bottom of the truss plate to close the gap. Since the fixing device includes multiple sets of fixing components spaced apart along the length of the templates, each set containing symmetrically arranged clamping units and connecting units, complex internal scaffolding is not required. Pressure in the width direction of the templates is applied by connecting the clamping units to the two ends of the connecting units and tightening them with threads, thus fixing the two templates relatively to both sides of the main precast beam. This significantly shortens the construction cycle, improves construction efficiency, and reduces production costs. Furthermore, this structure can precisely fix the templates, ensuring a tight fit between the templates and the secondary precast beams and truss plates, avoiding casting quality problems caused by template displacement.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to a fixing device for prefabricated beam templates in prefabricated buildings. Background Technology

[0002] The "heavy industry upstairs" model can effectively alleviate the shortage of industrial land in large cities and promote the clustered development of new construction industries such as modular integrated buildings. This upstairs factory building adopts a structural system combining cast-in-place columns with precast beams and truss slabs. The truss slabs are located between two secondary precast beams, with the bottom of the truss slab flush with the top of the secondary precast beams. Because the floor slab needs to withstand the dynamic load of vehicles, to improve the overall integrity of the floor slab and increase the thickness of the cast-in-place layer of the main precast beam, the position of the secondary precast beams needs to be adjusted, raising them by 15-20cm. This results in a 15-20cm gap between the bottom of the truss slab and the top of the main beam. Traditional methods of closing this gap require erecting an internal formwork frame within the concrete frame structure, followed by sealing and reinforcing the cast-in-place layer using formwork and fixing structures. However, this method has a long construction cycle, low efficiency, and high production costs. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a fixing device for formwork of cast-in-place beams and columns in prefabricated buildings, which solves the technical problems of sealing and reinforcing cast-in-place beams and columns, long construction period, low efficiency and high production cost.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] This utility model provides a fixing device for formwork of cast-in-place beams and columns in prefabricated buildings, used to fix the formwork on both sides of the main precast beam. The two sides of the formwork in the length direction abut against the side walls of the secondary precast beam, and the top of the formwork abuts against the bottom of the truss plate to close the gap. The fixing device includes multiple sets of fixing components spaced apart along the length direction of the formwork. Each set of fixing components includes: two sets of symmetrically arranged clamping units, located on the outside of the two formworks on both sides of the main precast beam, with the clamping units extending along the height direction of the formwork; and multiple connecting units, spaced apart along the height direction of the main precast beam. The two ends of the connecting units are respectively connected to the two clamping units and are tightened by threads to apply pressure in the width direction of the formwork, so that the two formworks are relatively fixed to both sides of the main precast beam.

[0008] Preferably, the clamping unit includes two abutment rods; the two abutment rods are spaced apart along the length of the template, the abutment rods are vertically oriented and extend along the height of the template, and the two abutment rods are abutted against the template by snap-fit ​​members; the two ends of the connecting unit are respectively connected to the snap-fit ​​members on both sides and fastened by threads to make the abutment rods press against the template.

[0009] Preferably, a channel is formed between the outer walls of the two abutment rods for the connecting unit to pass through; after the connecting unit passes through the channel, the abutment rod is pressed against the template by threaded fastening.

[0010] Preferably, the transverse cross-section of the snap-fit ​​component is a U-shaped structure.

[0011] Preferably, the abutment rod is a hollow steel pipe; the outer wall of the abutment rod is provided with anti-slip texture.

[0012] Preferably, the connecting unit includes a screw and a nut; the screw passes through the clamping units on both sides in sequence, and pressure in the width direction of the template is applied by tightening the nut.

[0013] Preferably, each set of fixing components includes two sets of connecting units, located at one-third of the height of the clamping unit at both ends.

[0014] Preferably, a sealing strip is provided between the top of the template and the bottom of the truss plate.

[0015] (III) Beneficial Effects

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses a fixing device for cast-in-place beams and columns in prefabricated buildings. It is used to fix the formwork on both sides of the main precast beam. The two sides of the formwork along its length abut against the side walls of the secondary precast beam, and the top of the formwork abuts against the bottom of the truss plate to close the gap. Since the fixing device includes multiple sets of fixing components spaced apart along the length of the formwork, each set containing symmetrically arranged clamping units and connecting units, complex internal scaffolding is unnecessary. Pressure in the width direction of the formwork is applied by connecting the clamping units at both ends of the connecting units and tightening them with threads, thus fixing the two formworks relatively to both sides of the main precast beam. This significantly shortens the construction cycle, improves construction efficiency, and reduces production costs. Furthermore, this structure can precisely fix the formwork, ensuring a tight fit between the formwork and the secondary precast beam and truss plate, avoiding casting quality problems caused by formwork displacement. Attached Figure Description

[0018] Figure 1 A first-view structural diagram of the formwork fixing device for cast-in-place beams and columns in prefabricated buildings in use;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure with one truss plate removed;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0021] Figure 4 A second-view structural diagram showing the use of the formwork fixing device for cast-in-place beams and columns in prefabricated buildings;

[0022] Figure 5 A transverse sectional view of the fixing device for the formwork of cast-in-place beams and columns in prefabricated buildings.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1. Fixing device; 11. Fixing component; 111. Clamping unit; 1111. Snap-fit ​​component; 1112. Abutment rod; 112. Connecting unit; 1121. Screw; 1122. Nut; 2. Main precast beam; 3. Secondary precast beam; 4. Formwork; 5. Truss plate. Detailed Implementation

[0025] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-3 As shown, this embodiment of the utility model provides a fixing device for formwork of cast-in-place beams and columns in prefabricated buildings, used to fix the formwork 4 on both sides of the main prefabricated beam 2. A formwork 4 is set between two adjacent secondary prefabricated beams 3. The two sides of the formwork 4 in the length direction abut against the side walls of the secondary prefabricated beam 3 respectively. The bottom end of the truss plate 5 is flush with the top end of the secondary prefabricated beam 3. The top end of the formwork 4 abuts against the bottom end of the truss plate 5 to close the gap between the bottom end of the truss plate 5 and the top end of the main prefabricated beam. In this embodiment, as... Figure 1 As shown, the vertical direction represents the height, and the horizontal direction represents the thickness. Figure 4 As shown, the left and right directions represent the length direction.

[0027] like Figure 4 As shown, the fixing device 1 includes multiple sets of fixing components 11 spaced apart along the length of the template 4, such as... Figure 5As shown, each fixing component 11 includes two symmetrically arranged clamping units 111 and multiple connecting units 112. The two clamping units 111 are located on the outer sides of the two templates 4 on both sides of the main precast beam 2. The clamping units 111 extend along the height direction of the template 4, and the multiple connecting units 112 are spaced apart along the height direction of the main precast beam 2. Since the two ends of the connecting units 112 are connected to the two clamping units 111 respectively and the pressure in the width direction of the template is applied by threaded fastening, so that the two templates 4 are relatively fixed on both sides of the main precast beam 2, there is no need for complex internal scaffolding construction. This achieves the relative fixing of the two templates 4 on both sides of the main precast beam 2, significantly shortening the construction cycle, improving construction efficiency, and reducing production costs. Moreover, this structure can accurately fix the templates 4, ensuring a tight fit between the templates 4 and the secondary precast beam 3 and truss plate 5, avoiding casting quality problems caused by template 4 displacement. Figure 5 As shown, the connecting unit 112 passes through the connection hole reserved in the main precast beam 2 and is connected to the two clamping units 111 at both ends.

[0028] like Figure 5 As shown, the clamping unit 111 includes two abutment rods 1112. The two abutment rods 1112 are spaced apart along the length of the template 4 and extend along the height of the template 4. They abut against the template 4 through snap-fit ​​pieces 1111. The vertical orientation of the abutment rods 1112 increases the contact area with the template 4, allowing the clamping unit 111 to more stably position and fix the template 4, further improving the reliability of the template 4 fixation. This makes the template 4 less prone to deformation or displacement during the pouring process, ensuring the quality of the pouring. Each clamping unit 111 includes two snap-fit ​​pieces 1111. In the clamping units 111 on both sides of the main precast beam 2, the snap-fit ​​pieces 1111 are arranged opposite each other to facilitate the connection of the connecting unit 112. A channel is formed between the outer walls of the two abutment rods 1112 for the connecting unit 112 to pass through. After the connecting unit 112 passes through the channel, the abutment rods 1112 are pressed against the template 4 by threaded fastening.

[0029] The transverse cross-section of the snap-fit ​​component 1111 is U-shaped, which can better fix the abutment rod 1112 and enhance the constraint effect on the abutment rod 1112.

[0030] In this embodiment, the abutment rod 1112 is a hollow steel pipe, which reduces the weight of the device while ensuring sufficient strength, making it easier to install and transport. The outer wall of the abutment rod 1112 is provided with anti-slip texture. The anti-slip texture on its outer wall increases the friction between it and the template 4, further improving the fixing effect on the template 4 and preventing the template 4 from sliding during construction.

[0031] like Figure 5As shown, the connecting unit 112 includes a screw 1121 and a nut 1122. The screw 1121 passes through the clamping units 111 on both sides in sequence, and pressure in the width direction of the template is applied by tightening the nut 1122. This connection method is simple and convenient to operate, and can quickly realize the fixing and disassembly of the template 4. Moreover, the threaded fastening method can adjust the pressure according to actual needs to ensure the stability and reliability of the template 4. It should be noted that after the screw 1121 passes through the clamping unit 111 on one side, it passes through the connecting hole on the main precast beam 2 to connect to the clamping unit 111 on the other side.

[0032] like Figure 4 As shown, each set of fixing components 11 includes two sets of connecting units 112, which are respectively located at the two ends of the clamping unit 111 at each 1 / 3 of the height direction, so that the template 4 is subjected to uniform force in the height direction, avoiding deformation of the template 4 due to uneven force, further improving the stability and reliability of the template 4 fixing, and ensuring the pouring quality.

[0033] A sealing strip is provided between the top of the template 4 and the bottom of the truss plate 5, which enhances the sealing between the two, effectively prevents concrete slurry leakage during the pouring process, avoids subsequent repair work caused by leakage, improves construction quality and efficiency, and also ensures the waterproof performance of the building structure.

[0034] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fixing device for formwork of cast-in-place beams and columns in prefabricated buildings, used to fix formwork (4) on both sides of a main prefabricated beam (2), wherein the two sides of the formwork (4) in the length direction respectively abut against the side walls of a secondary prefabricated beam (3), and the top end of the formwork (4) abuts against the bottom end of a truss plate (5) to close the gap, characterized in that, The fixing device (1) includes multiple sets of fixing components (11) spaced apart along the length of the template (4), each set of fixing components (11) including: Two sets of symmetrically arranged clamping units (111) are located on the outside of the two templates (4) on both sides of the main precast beam (2), and the clamping units (111) extend along the height direction of the templates (4); Multiple connecting units (112) are spaced apart along the height direction of the main precast beam (2). The two ends of the connecting unit (112) are respectively connected to two clamping units (111) and pressure in the width direction of the template (4) is applied by threaded fastening so that the two templates (4) are relatively fixed to the two sides of the main precast beam (2).

2. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 1, characterized in that: The clamping unit (111) includes two abutment rods (1112); Two abutment rods (1112) are spaced apart along the length of the template (4). The abutment rods (1112) are vertically oriented and extend along the height of the template (4). The two abutment rods (1112) are abutted against the template (4) by snap-fit ​​(1111). The two ends of the connecting unit (112) are respectively connected to the snap-fit ​​members (1111) on both sides and fastened by threads so that the abutment rod (1112) presses against the template (4).

3. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 2, characterized in that: A channel is formed between the outer walls of the two abutment rods (1112) for the connecting unit (112) to pass through; After the connecting unit (112) passes through the channel, the abutment rod (1112) is pressed against the template (4) by threaded fastening.

4. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 3, characterized in that: The transverse cross-section of the snap-fit ​​component (1111) is a U-shaped structure.

5. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 3, characterized in that: The abutment rod (1112) is a hollow steel pipe; The outer wall of the abutment rod (1112) is provided with anti-slip texture.

6. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 1, characterized in that: The connecting unit (112) includes a screw (1121) and a nut (1122); The screw (1121) passes through the clamping units (111) on both sides in sequence, and applies pressure in the width direction of the template (4) by tightening the nut (1122).

7. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 1, characterized in that: Each set of fixing components (11) includes two sets of connecting units (112), located at one-third of the height of the clamping unit (111).

8. The fixing device for cast-in-place beams and columns in prefabricated buildings as described in claim 1, characterized in that: A sealing strip is provided between the top of the template (4) and the bottom of the truss plate (5).

Images