Post-cast strip formwork system of assembly type laminated slab

Abstract

The utility model discloses a post-cast strip template system of an assembly type laminated slab, which is characterized by comprising a screw rod, a leveling rod, a bottom template, a sleeve and a first nut, the leveling rod is transversely arranged, the upper end of the screw rod is detachably connected with the middle part of the leveling rod, and the bottom template is provided with a through hole matched with the screw rod; the lower end of the sleeve is in close contact with the bottom template, and the sleeve corresponds to the position of the through hole; the screw rod sequentially penetrates through the sleeve and the through hole from top to bottom and then is connected with the first nut; and the first nut is in close contact with the lower surface of the bottom template. According to the post-cast strip formwork system, the post-cast strip formwork of the laminated slab can be rapidly erected and leveled, newly-poured concrete and the lower portion of the laminated slab are made to be flat, and the post-cast strip formwork system is convenient to erect and disassemble and high in efficiency.

Description

Technical Field

[0001] The utility model relates to the field of building construction, in particular to a post-casting strip formwork system of an assembled superimposed slab. Background Art

[0002] Composite slabs are assembled integral floor slabs made of prefabricated slabs and cast-in-place reinforced concrete layers. Composite slabs have good integrity, and the upper and lower surfaces of the slabs are flat, which is convenient for finishing layer decoration. They are suitable for high-rise buildings and large-span buildings that require high overall rigidity.

[0003] After the composite panels are assembled, concrete needs to be poured at the joints to make the adjacent composite panels tightly bonded and ensure that the concrete poured in the gap is flush with the lower part of the composite panels. For example, a prefabricated composite panel connection device disclosed in the publication number CN106760108A and the publication date May 31, 2017, can pour concrete in the gap between the two composite panels by setting an H-shaped steel beam and a polystyrene board between two adjacent composite panels. However, this method requires the H-shaped steel beam to be set from the bottom, which occupies a large space and is difficult to disassemble after the concrete is poured, which is inefficient. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a post-cast strip formwork system for an assembled composite slab, which can realize the rapid erection and leveling of the post-cast strip formwork of the composite slab, so that the newly poured concrete and the lower part of the composite slab are level, and the assembly and disassembly are convenient and efficient.

[0005] In order to solve the above technical problems, the technical solutions adopted are as follows:

[0006] The post-casting strip formwork system of the assembled composite slab is characterized by comprising a screw rod, a leveling rod, a bottom formwork, a sleeve and a first nut. The leveling rod is arranged horizontally, and the upper end of the screw rod is detachably connected to the middle part of the leveling rod. A through hole matching the screw rod is opened on the bottom formwork; the lower end of the sleeve is in close contact with the bottom formwork, and the positions of the sleeve and the through hole correspond to each other; the screw rod passes through the sleeve and the through hole in sequence from top to bottom and is connected to the first nut, and the first nut is in close contact with the lower surface of the bottom formwork.

[0007] When the above-mentioned post-cast strip formwork system is in use, the bottom formwork is set below the gap between two adjacent composite plates, and the two ends of the bottom formwork are respectively below the lower surfaces of the two composite plates; then the screw rod is passed through the sleeve and the through hole in turn and connected to the first nut until the two ends of the leveling rod are respectively in close contact with the upper surfaces of the two composite plates, and at this time, the two ends of the upper surface of the bottom formwork are also respectively in close contact with the lower surfaces of the two composite plates, thereby completing the rapid erection and leveling of the post-cast strip formwork of the composite plates, and the bottom formwork seals the bottom of the gap between the two composite plates to form a casting cavity; then concrete is poured into the casting cavity, and after the pouring is completed and cured for a specified time, the screw rod and the bottom formwork can be removed after unscrewing the first nut; finally, the hole of the sleeve is filled and sealed with micro-expansive cement mortar to complete the concrete pouring of the gap between the two composite plates, and the newly poured concrete is flush with the lower surface of the composite plate. This type of prefabricated composite slab post-casting strip formwork system can realize the rapid erection and leveling of the composite slab post-casting strip formwork, so that the upper surface of the bottom formwork is in close contact with the lower surface of the composite slab, so that the newly poured concrete and the lower part of the composite slab are level, and it is easy to erect and disassemble with high efficiency. The sleeve wraps the part of the screw in the pouring cavity to prevent the concrete from bonding the connection between the upper end of the screw and the leveling rod, and facilitates the removal of the screw after the concrete pouring is completed.

[0008] Usually, the upper end of the sleeve is in close contact with the middle of the leveling rod.

[0009] In a preferred embodiment, the leveling rod comprises a cross bar and a second nut, the second nut is connected to the middle of the cross bar, and the second nut is threadedly connected to the upper end of the screw rod. The leveling rod and the screw rod are connected by the second nut, which is convenient for subsequent disassembly. Preferably, the cross bar is made of threaded steel. The second nut is usually directly welded to the middle of the cross bar. Usually, the upper end of the sleeve is in close contact with the second nut. The upper end of the screw rod can also be clamped with the middle of the leveling rod.

[0010] In the preferred embodiment, the bottom formwork includes a post-cast strip bottom plate and supporting wood, and the supporting wood is installed on the lower surface of the post-cast strip bottom plate. The supporting wood can support the middle part of the post-cast strip bottom plate to prevent the middle part of the post-cast strip bottom plate from bulging downward during pouring, and ensure that the newly poured concrete can remain flat with the lower part of the composite slab.

[0011] In a further preferred embodiment, the through hole includes a first through hole provided on the bottom plate of the post-casting strip and a second through hole provided on the supporting wood, the lower end of the sleeve is installed in the first through hole, and the aperture of the second through hole is not larger than the inner diameter of the sleeve. Preferably, the outer wall of the lower end of the sleeve is in close contact with the inner wall of the first through hole. In this way, concrete will not enter the through hole during pouring, which is convenient for subsequent disassembly and reuse of the bottom template.

[0012] In a further preferred embodiment, the post-cast strip formwork system also includes a gasket, which has a third through hole corresponding to the position of the through hole, and the gasket is in close contact with the lower surface of the supporting wooden square. The screw passes through the sleeve, the through hole and the third through hole from top to bottom in sequence and is connected to the first nut.

[0013] In a preferred embodiment, the first nut is a butterfly nut, which is more convenient for disassembly and assembly.

[0014] The beneficial effect of the utility model is that the post-cast strip formwork system of the assembled composite slab can realize the rapid erection and leveling of the post-cast strip formwork of the composite slab, so that the newly poured concrete and the lower part of the composite slab are level, and the assembly and disassembly are convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the post-casting strip formwork system in the embodiment of the utility model;

[0016] Figure 2 It is a top view of the post-casting strip formwork system in the embodiment of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] like Figure 1-2 The post-casting strip formwork system of the prefabricated composite slab shown in the figure includes a screw 1, a leveling rod 2, a bottom formwork 3, a sleeve 4 and a first nut 5. The leveling rod 2 is arranged horizontally, and the upper end of the screw 1 is detachably connected to the middle part of the leveling rod 2. A through hole 301 matching the screw 1 is opened on the bottom formwork 3; the lower end of the sleeve 4 is in close contact with the bottom formwork 3, and the position of the sleeve 4 corresponds to the position of the through hole 301; the screw 1 passes through the sleeve 4 and the through hole 301 from top to bottom in sequence and is connected to the first nut 5, and the first nut 5 is in close contact with the lower surface of the bottom formwork 3.

[0019] When the above-mentioned post-cast strip formwork system is in use, the bottom formwork 3 is set below the gap between two adjacent composite plates 6, and the two ends of the bottom formwork 3 are respectively below the lower surfaces of the two composite plates 6; then the screw 1 is passed through the sleeve 4 and the through hole 301 in sequence and connected to the first nut 5 until the two ends of the leveling rod 2 are respectively in close contact with the upper surfaces of the two composite plates 6, at this time, the two ends of the upper surface of the bottom formwork 3 are also in close contact with the lower surfaces of the two composite plates 6, thereby completing the rapid erection and leveling of the post-cast strip formwork of the composite plates 6, and the bottom formwork 3 seals the bottom of the gap between the two composite plates 6 to form a casting cavity; then concrete is poured into the casting cavity, and after the pouring is completed and cured for a specified time, the screw 1 and the bottom formwork 3 can be removed after unscrewing the first nut 5; finally, the hole of the sleeve 4 is filled and sealed with micro-expansive cement mortar to complete the concrete pouring of the gap between the two composite plates 6, and the newly poured concrete is flush with the lower surface of the composite plate 6. This type of prefabricated composite slab 6 post-casting strip formwork system can realize the rapid erection and leveling of the composite slab 6 post-casting strip formwork, so that the upper surface of the bottom formwork 3 is in close contact with the lower surface of the composite slab 6, so that the newly poured concrete and the lower part of the composite slab 6 are level, and the erection and disassembly are convenient and efficient. The sleeve 4 wraps the part of the screw 1 in the pouring cavity to prevent the concrete from bonding the connection part between the upper end of the screw 1 and the leveling rod 2, and facilitates the disassembly of the screw 1 after the concrete pouring is completed.

[0020] The leveling rod 2 includes a cross bar 201 and a second nut 202, wherein the second nut 202 is connected to the middle of the cross bar 201, and the second nut 202 is threadedly connected to the upper end of the screw rod 1. The leveling rod 2 and the screw rod 1 are connected by the second nut 202, which is convenient for subsequent disassembly. The cross bar 201 is made of threaded steel. The second nut 202 is directly welded to the middle of the cross bar 201. The upper end of the sleeve 4 is in close contact with the second nut 202.

[0021] The bottom formwork 3 includes a post-cast strip bottom plate 302 and a supporting wood 303, and the supporting wood 303 is installed on the lower surface of the post-cast strip bottom plate 302. The supporting wood 303 can support the middle part of the post-cast strip bottom plate 302 to prevent the middle part of the post-cast strip bottom plate 302 from bulging downward during pouring, and ensure that the newly poured concrete can be kept flat with the lower part of the composite plate 6.

[0022] The through hole 301 includes a first through hole 3011 opened on the bottom plate 302 of the post-casting strip and a second through hole 3012 opened on the supporting wood 303. The lower end of the sleeve 4 is installed in the first through hole 3011, and the outer wall of the lower end of the sleeve 4 is in close contact with the inner wall of the first through hole 3011. The aperture of the second through hole 3012 is not larger than the inner diameter of the sleeve 4. In this way, concrete will not enter the through hole 301 during pouring, which is convenient for subsequent disassembly and reuse of the bottom template 3.

[0023] The post-casting strip formwork system also includes a gasket 7, which has a third through hole 301 corresponding to the position of the through hole 301. The gasket 7 is in close contact with the lower surface of the supporting wood 303. The screw 1 passes through the sleeve 4, the through hole 301 and the third through hole 301 from top to bottom in sequence and is connected to the first nut 5.

Claims

1. The post-casting strip formwork system of the assembled composite slab is characterized by It includes a screw, a leveling rod, a bottom template, a sleeve and a first nut. The leveling rod is arranged horizontally. The leveling rod includes a cross bar and a second nut. The second nut is connected to the middle part of the cross bar, and the second nut is threadedly connected to the upper end of the screw. A through hole matching the screw is opened on the bottom template. The upper end of the sleeve is in close contact with the second nut, the lower end of the sleeve is in close contact with the bottom template, and the positions of the sleeve and the through hole correspond to each other. The screw passes through the sleeve and the through hole from top to bottom in sequence and is connected to the first nut. The first nut is in close contact with the lower surface of the bottom template.

2. The post-casting strip formwork system of the assembled composite slab according to claim 1, characterized in that: The bottom template comprises a post-cast strip bottom plate and supporting wood blocks, and the supporting wood blocks are installed on the lower surface of the post-cast strip bottom plate.

3. The post-casting strip formwork system of the assembled composite slab according to claim 2, characterized in that: The through holes include a first through hole opened on the bottom plate of the post-casting belt and a second through hole opened on the supporting wood. The lower end of the sleeve is installed in the first through hole, and the aperture of the second through hole is not larger than the inner diameter of the sleeve.

4. The post-casting strip formwork system of the assembled composite slab according to claim 3, characterized in that: The outer side wall of the lower end of the sleeve is in close contact with the inner wall of the first through hole.

5. The post-casting strip formwork system of the assembled composite slab according to claim 2, characterized in that: The post-casting strip formwork system also includes a gasket, which has a third through hole corresponding to the position of the through hole. The gasket is in close contact with the lower surface of the supporting wood, and the screw passes through the sleeve, the through hole and the third through hole from top to bottom in sequence and is connected to the first nut.

6. The post-casting strip formwork system of the assembled composite slab according to claim 1, characterized in that: The first nut is a butterfly nut.

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