A hollow inner mold anti-floating fixing device for reducing the superposition of floor slab

Abstract

The application discloses a hollow inner mold anti-floating fixing device for a weight-reducing composite floor, and relates to the field of building construction.The hollow inner mold anti-floating fixing device comprises a prefabricated composite slab, a plurality of corresponding light hollow inner molds are arranged on the prefabricated composite slab, and an anti-floating fixing mechanism is arranged on the prefabricated composite slab.A "several" inverted steel pressing plate is placed at a position close to the middle of the light hollow inner mold, and the steel pressing plate can be slightly adjusted leftward and rightward during installation, and the steel pressing plate can avoid the steel bars.At this time, a steel threaded draw hook can be passed through a waist hole reserved in the "several" inverted steel pressing plate, and the end hook of the steel threaded draw hook can be hooked on a steel pipe truss.A washer and a butterfly screw are sequentially pre-installed at a threaded end of the tail of the steel threaded draw hook, the butterfly screw is fastened after installation, and the plate surface steel bars can be installed at this time, and the composite layer concrete can be poured.The hollow inner mold anti-floating fixing device has the advantages of simple structure, good fixing effect, easy material taking, convenient construction, and the like, can effectively eliminate the floating influence caused by the pouring of the concrete, and improves the construction quality.

Description

Technical Field

[0001] This application relates to the field of building construction, and particularly to an anti-floating fixing device for hollow internal molds of a reduced-overlap composite floor slab. Background Art

[0002] With the continuous development of China's economy and the continuous advancement of the industrialization wave, the requirements for building projects in terms of large space, large span, high bearing capacity, and fast construction speed are getting higher and higher. The structural form of the lightweight hollow composite floor slab is used in more and more projects.

[0003] The main method of the reduced-overlap composite floor slab is to, on the basis of the traditional cast-in-place floor slab, set steel pipe truss prestressed concrete composite slabs as the "bottom form" of the floor slab, and place lightweight hollow internal molds inside the concrete slab. Finally, a cast-in-place concrete composite layer is formed, thereby forming a cavity-like structure inside the floor slab, which can reduce the amount of concrete used, reduce the self-weight of the floor slab, and has good spatial stress performance, and its economy and environmental protection are very excellent. Due to the use of lightweight hollow internal molds, it is very easy to cause floating during the concrete pouring process, resulting in problems such as overall steel bar deviation and uneven slab thickness of the floor slab.

[0004] In view of the above problems, this patent designs a fixing device to fix the hollow internal mold on the steel pipe truss prestressed concrete composite slab, thereby forming an integral structure to eliminate the floating influence generated by the hollow internal mold during concrete pouring. Utility Model Content

[0005] In order to solve the technical problems in the construction process of the reduced-overlap composite floor slab, this application provides an anti-floating fixing device for hollow internal molds of a reduced-overlap composite floor slab.

[0006] An anti-floating fixing device for hollow internal molds of a reduced-overlap composite floor slab provided by this application adopts the following technical solution: An anti-floating fixing device for hollow internal molds of a reduced-overlap composite floor slab includes a precast composite slab, and a plurality of corresponding lightweight hollow internal molds are provided on the precast composite slab, and an anti-floating fixing mechanism is provided on the precast composite slab;

[0007] The anti-floating fixing mechanism includes a plurality of steel pipe trusses, a plurality of rib beam steel bars, and a plurality of slab surface steel bars corresponding to the lightweight hollow internal molds and the precast composite slab. An inverted "U" - shaped fixing steel pressing plate is provided on the precast composite slab. A kidney-shaped hole is opened on the inverted "U" - shaped fixing steel pressing plate, and a steel threaded hook is provided in the kidney-shaped hole, and a butterfly screw is provided on the steel threaded hook.

[0008] By adopting the above technical solution, the precast composite slabs are hoisted and the rib reinforcement is installed on site according to the engineering construction drawings. The lightweight hollow inner mold is placed according to the reserved position on the slab surface. The inverted "V" shaped fixing steel pressure plate is placed near the middle position of the lightweight hollow inner mold. During installation, it can be slightly adjusted left and right to avoid the reinforcement. At this time, the steel thread hook can be passed through the reserved waist hole of the inverted "V" shaped fixing steel pressure plate and the end hook is hooked to the steel pipe truss.

[0009] Preferably, the steel threaded hook consists of a threaded post and a bent hook, and the threaded post and the bent hook are fixedly installed.

[0010] By adopting the above technical solution, the steel threaded hook is composed of a threaded post and a bent hook, and the threaded post and bent hook are fixedly installed, which facilitates installation and use.

[0011] Preferably, the steel threaded hook is provided with a washer, and the washer is located below the wing screw.

[0012] By adopting the above technical solution and setting shims, the installation and positioning can be assisted.

[0013] Preferably, the width of the gasket is greater than the width of the kidney hole.

[0014] By adopting the above technical solution and setting the kidney hole, an auxiliary installation function can be achieved.

[0015] Preferably, the width of the kidney hole is greater than the width of the bottom hook of the steel threaded hook.

[0016] By adopting the above technical solution, the width of the kidney hole must be greater than the width of the bottom hook of the steel threaded hook, thus facilitating installation and positioning.

[0017] Preferably, the prefabricated composite slab has multiple mounting holes on one side, and corresponding reinforcing ribs are fixedly installed in each of the multiple mounting holes.

[0018] By adopting the above technical solution, the installation holes facilitate the fixing of the reinforcing ribs, and the reinforcing ribs can improve the strength during positioning and installation.

[0019] Preferably, the mounting holes and reinforcing ribs are of the same size.

[0020] By adopting the above technical solution, and by setting the same size for the mounting holes and reinforcing ribs, installation and use are facilitated.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. This application utilizes steel threaded hooks and other components. By placing an inverted "V"-shaped fixing steel pressure plate near the center of a lightweight hollow inner mold, slight adjustments can be made left and right during installation to avoid reinforcing bars. At this point, the steel threaded hook can be passed through the pre-drilled holes in the inverted "V"-shaped fixing steel pressure plate, and the end hook can be hooked onto the steel pipe truss. Washers and wing screws are pre-installed at the threaded ends of the steel threaded hooks. After installation, the wing screws are tightened. At this point, the slab reinforcement can be installed, and the composite layer concrete can be poured. The structure is simple, the fixing effect is good, the materials are readily available, and the construction is convenient. It can effectively eliminate the floating effect caused by concrete pouring and improve the construction quality.

[0023] 2. This application utilizes steel pipe trusses and the like, which, through the steel pipe trusses, rib reinforcement, and slab reinforcement, can be used to position and install in conjunction with the anti-buoyancy fixing mechanism. This allows for the positioning and installation of multiple lightweight hollow inner molds, thereby further improving the convenience and flexibility of positioning and installing lightweight hollow inner molds. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an anti-buoyancy fixing device for hollow inner mold of composite floor slabs according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram illustrating the anti-buoyancy fixing structure, which is the main feature of the embodiments of this application.

[0026] Figure 3 This is a schematic diagram illustrating the installation of the anti-buoyancy fixing structure, which is the main feature of this embodiment.

[0027] Figure 4 This is a schematic diagram illustrating the fixing part of the anti-buoyancy fixing structure, which is the main feature of this application embodiment;

[0028] Reference numerals in the attached diagram: 1. Inverted "V" shaped fixing steel pressure plate; 2. Steel threaded hook; 3. Washer; 4. Wing screw; 5. Kidney hole; 6. Lightweight hollow inner mold; 7. Steel pipe truss; 8. Precast composite slab; 9. Rib beam reinforcement; 10. Slab surface reinforcement; 11. Reinforcing rib; 12. Anti-buoyancy fixing mechanism; 13. Threaded column; 14. Hook; 15. Mounting hole. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0030] This application discloses an anti-buoyancy fixing device for hollow inner molds of composite floor slabs to reduce overlap.

[0031] Reference Figure 1 , Figure 3 and Figure 4, An anti-floating fixing device for hollow internal molds of a reduced-overlap composite floor slab, including a precast composite slab 8, multiple corresponding lightweight hollow internal molds 6 provided on the precast composite slab 8, and an anti-floating fixing mechanism 12 provided on the precast composite slab 8;

[0032] Among them, the anti-floating fixing mechanism 12 includes multiple steel pipe trusses 7, multiple rib beam steel bars 9, and multiple slab surface steel bars 10 provided correspondingly on the lightweight hollow internal mold 6 and the precast composite slab 8. There is an inverted "V" - shaped fixed steel pressing plate 1 provided on the precast composite slab 8. A kidney - shaped hole 5 is opened on the inverted "V" - shaped fixed steel pressing plate 1. A steel threaded hook 2 is provided in the kidney - shaped hole 5. A butterfly screw 4 is provided on the steel threaded hook 2. The steel threaded hook 2 is composed of a threaded column 13 and a hook 14, and the threaded column 13 and the hook 14 are fixedly installed. A gasket 3 is provided on the steel threaded hook 2. The gasket 3 is located below the butterfly screw 4. The width of the gasket 3 is greater than the width of the kidney - shaped hole 5. The width of the kidney - shaped hole 5 is greater than the width of the bottom hook 14 of the steel threaded hook 2.

[0033] During use, the precast composite slab 8 is hoisted on - site according to the engineering construction drawing and the rib beam steel bars 9 are installed. The lightweight hollow internal mold 6 is placed according to the reserved position on the slab surface. The inverted "V" - shaped fixed steel pressing plate 1 is placed near the middle position of the lightweight hollow internal mold 6. During installation, it can be finely adjusted left and right to avoid the steel bars. At this time, the steel threaded hook 2 can be passed through the reserved kidney - shaped hole 5 of the inverted "V" - shaped fixed steel pressing plate 1, and the end hook 14 is hooked on the steel pipe truss 7. The gasket 3 and the butterfly screw 4 are pre - installed on the threaded end of the tail of the steel threaded hook 2 in sequence. After installation, the butterfly screw 4 is tightened. At this time, the slab surface steel bars 10 can be installed and the composite layer concrete can be poured.

[0034] Refer to Figure 1-2 , The anti - floating fixing mechanism 12 further includes multiple installation holes 15 opened on one side of the precast composite slab 8, and corresponding reinforcing ribs 11 are fixedly installed in the multiple installation holes 15. The sizes of the installation holes 15 and the reinforcing ribs 11 are the same.

[0035] During use, the installation holes 15 are provided to facilitate the fixed installation of the reinforcing ribs 11, and the reinforcing ribs 11 are provided to improve the strength during positioning installation.

[0036] In this application, the thickness of the inverted "V" - shaped fixed steel pressing plate 1 is 3 - 5 mm. Five flat steels are welded and fixed to form the inverted "V" - shaped fixed steel pressing plate 1 by welding; the height of the inverted "V" - shaped fixed steel pressing plate 1 is generally 100 - 150 mm, and the specific height can be determined according to the height of the hollow inner mold in different projects. The lengths of the two side wing plates can be left the same or different according to the installation position, generally 150 - 250 mm; the length of the middle horizontal steel plate of the inverted "V" - shaped fixed steel pressing plate 1 is determined according to the spacing between the hollow inner molds 6, generally 100 - 150 mm, and an oblong hole 5 with a width of 8 - 10 mm and a length of 80 - 100 mm is opened in the middle; the steel threaded hook 2 passes through the oblong hole 5 in the middle of the inverted "V" - shaped fixed steel pressing plate and hooks the steel pipe truss 7 on the prestressed composite slab; the steel threaded hook 2 is made of round steel with a diameter of 6 - 8 mm, the overall length is about 150 - 350 mm, and there is a thread with a length of 150 - 200 mm at the tail. The angle of the hook is generally not less than 135°; the gasket 3 passes through the steel threaded hook 2 and is fastened to the tail of the steel threaded hook 2 with the butterfly screw 4, so that the inverted "V" - shaped fixed steel pressing plate 1 tightly presses the lightweight hollow inner mold 6, thereby being fixed with the precast composite slab 8 to form an integral body to eliminate the floating influence.

[0037] The implementation principle of an anti - floating fixing device for the hollow inner mold of a reduced - overlap composite floor slab in an embodiment of this application is as follows: During use, on - site, the precast composite slab 8 is hoisted according to the engineering construction drawing and the rib beam steel bars 9 are installed. The lightweight hollow inner mold 6 is placed according to the reserved position on the slab surface. The inverted "V" - shaped fixed steel pressing plate 1 is placed near the middle position of the lightweight hollow inner mold ⑥. During installation, it can be finely adjusted left and right to avoid the steel bars. At this time, the steel threaded hook 2 can be passed through the oblong hole 5 reserved in the inverted "V" - shaped fixed steel pressing plate 1, and the end hook 14 is hooked to the steel pipe truss 7. The gasket 3 and the butterfly screw 4 are pre - installed at the threaded end of the tail of the steel threaded hook 2 in sequence. After installation, the butterfly screw 4 is tightened. At this time, the slab surface steel bars 10 can be installed and the composite layer concrete can be poured;

[0038] It solves the technical problems in the construction process of the reduced - overlap composite floor slab, and provides an anti - floating fixing device for the hollow inner mold of the reduced - overlap composite floor slab, which solves the problems such as uneven floor slab structure, inaccurate elevation control, steel bar deviation, and concrete hollowing caused by the buoyancy of a large number of lightweight hollow inner molds 6 in the hollow floor slab during the concrete pouring process of the reduced - overlap composite floor slab. Its structure is simple, the fixing effect is good, the materials are easy to obtain, the construction is convenient, it can effectively eliminate the floating influence caused by concrete pouring, and improve the construction quality.

[0039] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A device for reducing the buoyancy of hollow inner molds in composite floor slabs, comprising prefabricated composite slabs (8), characterized in that: A plurality of corresponding lightweight hollow inner molds (6) are provided on the precast composite slab (8), and an anti-floating fixing mechanism (12) is provided on the precast composite slab (8); The anti-floating fixing mechanism (12) includes a plurality of corresponding steel pipe trusses (7), a plurality of rib beam steel bars (9) and a plurality of slab surface steel bars (10) provided on the lightweight hollow inner mold (6) and the precast composite slab (8). A reverse "U" shaped fixed steel pressing plate (1) is provided on the precast composite slab (8). A kidney-shaped hole (5) is formed in the reverse "U" shaped fixed steel pressing plate (1). A steel threaded hook (2) is provided in the kidney-shaped hole (5), and a butterfly screw (4) is provided on the steel threaded hook (2).

2. The anti-buoyancy fixing device for hollow inner mold of composite floor slabs according to claim 1, characterized in that: The steel threaded hook (2) is composed of a threaded column (13) and a hook (14), and the threaded column (13) and the hook (14) are fixedly installed.

3. The anti-buoyancy fixing device for hollow inner mold of composite floor slabs according to claim 1, characterized in that: A gasket (3) is provided on the steel threaded hook (2), and the gasket (3) is located below the butterfly screw (4).

4. The anti-buoyancy fixing device for hollow inner mold of composite floor slabs according to claim 3, characterized in that: The width of the gasket (3) is greater than the width of the kidney-shaped hole (5).

5. A device for fixing and preventing buoyancy of hollow inner mold in composite floor slabs according to claim 3, characterized in that: The width of the kidney-shaped hole (5) is greater than the width of the bottom hook (14) of the steel threaded hook (2).

6. The anti-buoyancy fixing device for hollow inner mold of composite floor slabs according to claim 1, characterized in that: A plurality of installation holes (15) are formed on one side of the precast composite slab (8), and corresponding reinforcing ribs (11) are fixedly installed in the plurality of installation holes (15).

7. A device for fixing and preventing buoyancy of hollow inner mold for reducing overlapping composite floor slabs according to claim 6, characterized in that: The installation holes (15) and the reinforcing ribs (11) are of the same size.

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