Bottom pouring formwork at joint of fabricated building laminated slabs

Abstract

According to the bottom pouring formwork at the joint of the fabricated building laminated slabs, the structural strength of the joint of the laminated slabs is enhanced through fixed connection of the base plate and the bottom formwork, and the problem of cracking caused by infirm connection is effectively solved. A layer of base plate is additionally arranged on the top face of the bottom formwork at the joint to be fixed to the bottom formwork, so that a groove is formed in the plane of the joint of the laminated slabs after floor concrete is poured, ceiling plastering and decoration engineering construction can be conducted without roughening the joint of the laminated slabs, construction cost is reduced, and engineering quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated buildings, in particular to a formwork structure for pouring the bottom of the joint of a composite slab in a prefabricated building. Background Art

[0002] In prefabricated buildings, composite slabs are widely used due to their fast construction speed and high efficiency. However, bosses often occur at the joints of composite slabs due to uneven pressure during the concrete pouring process or formwork deformation, which not only affects the aesthetics of the building but also increases the difficulty and cost of subsequent ceiling plastering and decoration projects. Traditional methods often require roughening the joints, which is a cumbersome and inefficient process.

[0003] The patent with the application number CN202110644833.1 discloses a prestressed composite integral floor slab and construction method applied to prefabricated buildings, which solves the problem that precast floor slabs in the prior art are not suitable for floor slab structures with large spans, and has the beneficial effect of solving the problems of excessive temperature stress and cracking of the floor slab caused by the overlong floor slab structure. The specific scheme is as follows: A prestressed composite integral floor slab applied to prefabricated buildings includes assembled precast bottom slabs, a concrete composite layer is poured on the upper surface of the precast bottom slabs, the precast bottom slabs, the concrete composite layer, and the cast-in-place beam are cast into one body, the cast-in-place beam supports the precast bottom slabs and the concrete composite layer, and prestressed tendons are laid in the concrete composite layer, and the laying direction of the prestressed tendons is perpendicular to the joint direction of the precast bottom slabs.

[0004] However, the above patent does not solve the problem that bosses often occur at the joints of composite slabs due to uneven pressure during the concrete pouring process or formwork deformation, and cannot solve the technical problems existing in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a formwork for pouring the bottom of the joint of a composite slab in a prefabricated building to solve the problems raised in the above background art:

[0006] (1) How to improve the structure of the backing plate and the bottom formwork to achieve efficient and high-quality pouring at the joint of the composite slab, and significantly improve the structural strength and tightness.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A formwork for pouring the bottom of the joint of a composite slab in a prefabricated building;

[0009] It includes a backing plate and a bottom formwork. The bottom formwork is fixed to the lower side of the joint of the two adjacent composite slabs on both sides, the backing plate is arranged on the bottom formwork, and the backing plate is located inside the joint of two adjacent composite slabs.

[0010] Based on the above technical solutions, the utility model can also be improved as follows.

[0011] Further, the backing plate is an aluminum plate.

[0012] Further, the height of the backing plate is 3 - 4 mm.

[0013] Further, it further includes a rubber layer which covers the outside of the backing plate, and both side edges of the rubber layer respectively extend into the space between the bottom formwork and the laminated slab.

[0014] Further, it further includes an adjusting assembly which includes an adjusting bolt and an adjusting nut. The adjusting nut is fixedly connected to the bottom formwork. The adjusting bolt cooperates with the adjusting nut and the end of the adjusting bolt penetrates through the bottom formwork and abuts against the lower end face of the backing plate.

[0015] With such a structure, the bottom formwork is fixedly connected to the lower side of the joint of two adjacent laminated slabs, used to support and position the casting material, ensuring the uniformity and stability of the casting layer. The bottom formwork can be customized according to the size and shape of the laminated slab to meet different construction requirements.

[0016] The backing plate is fixedly connected to the bottom formwork and is located inside the joint of two adjacent laminated slabs. The backing plate is made of aluminum plate, because it is light in weight, high in strength and corrosion - resistant, and is suitable as the supporting structure of the formwork. The height of the backing plate is set to 3 - 4 mm to reduce material consumption and construction difficulty while ensuring the structural strength.

[0017] The rubber layer covers the outside of the backing plate and is used as a sealing layer. The rubber layer has good elasticity and sealing performance, can effectively prevent the slurry from leaking during the casting process, and ensure the sealing effect at the joint. Both side edges of the rubber layer respectively extend into the space between the bottom formwork and the laminated slab to form a tightly - fitting sealing structure.

[0018] The beneficial technical effects of the bottom casting formwork at the joint of the prefabricated building laminated slabs are as follows:

[0019] (1) Improve the structural strength: Through the fixed connection between the backing plate and the bottom formwork, the structural strength of the joint of the laminated slab is enhanced, effectively preventing the cracking problem caused by loose connection.

[0020] (2) Improve the sealing performance: The addition of the rubber layer significantly improves the sealing performance at the joint, effectively preventing problems such as water seepage and ensuring the overall quality of the building.

[0021] (3) Improve the construction efficiency: Adopting the prefabricated formwork structure simplifies the construction process, shortens the construction period, and improves the construction efficiency.

[0022] (4) Reduce the cost: The backing plate is made of aluminum plate material, which not only ensures the structural strength but also reduces the material cost; at the same time, due to the improvement of the construction efficiency, the labor and time costs are also indirectly reduced. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the first embodiment of the bottom casting formwork at the joint of the composite slab of the prefabricated building.

[0024] Figure 2 is a schematic structural diagram of the second embodiment of the bottom casting formwork at the joint of the composite slab of the prefabricated building.

[0025] Figure 3 is Figure 2 an enlarged view of part A of

[0026] Explanation of the reference numerals in the drawings:

[0027] Composite slab - 100; Bottom formwork - 200; Aluminum plate - 300; Concrete - 400; Rubber layer - 500; Adjusting bolt - 610; Adjusting nut - 620. Detailed Embodiment

[0028] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0029] The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent the only embodiment.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Embodiment 1

[0032] Please refer to Figure 1 as shown in

[0033] The bottom casting formwork at the joint of the composite slab of the prefabricated building includes a backing plate and a bottom formwork.

[0034] The bottom formwork is fixed to the lower side of the joint of the two side composite slabs, the backing plate is arranged on the bottom formwork, and the backing plate is located inside the joint of two adjacent composite slabs. The backing plate is an aluminum plate. The height of the backing plate is 3 - 4 mm.

[0035] Using the bottom casting formwork at the joint of the composite slab of the prefabricated building above to implement the construction method for preventing convex platforms at the joint of the composite slab of the prefabricated building, including the following steps:

[0036] I. Construction preparation

[0037] Material preparation:

[0038] Base plate: Select a 4mm thick aluminum plate 300 as the base plate, ensuring that the surface of the aluminum plate 300 is flat and without deformation, and the dimensions are accurate.

[0039] Special self-tapping screws: Select a suitable fixing method according to the material of the bottom formwork 200 and the on-site conditions.

[0040] Other conventional construction materials: Such as the bottom formwork 200, concrete pouring materials 400, etc.

[0041] Tool preparation:

[0042] Measuring tools: Such as tape measures, spirit levels, etc., for accurate measurement and positioning.

[0043] Installation tools: Such as screwdrivers, wrenches, etc., for fixing the aluminum plate 300 and the bottom formwork 200.

[0044] On-site investigation:

[0045] Investigate the joint of the composite slab 100 to determine the construction scope and specific location. Check the flatness and stability of the bottom formwork 200 to ensure that it meets the construction requirements.

[0046] II. Transformation of the bottom formwork

[0047] Positioning and measurement:

[0048] On the top surface of the bottom formwork 200 at the joint of the composite slab 100, accurately measure and position the installation position of the aluminum plate 300 according to the design requirements.

[0049] Laying of the aluminum plate 300:

[0050] Lay the prepared 4mm thick aluminum plate 300 on the top surface of the bottom formwork 200 according to the measured position, ensuring that the aluminum plate 300 is in close contact with the bottom formwork 200 without gaps.

[0051] Fixing of the aluminum plate 300:

[0052] Use special self-tapping screws (or use an adhesive. If an adhesive is used, ensure that the adhesive is evenly applied and firmly adhered) to firmly fix the aluminum plate 300 to the bottom formwork 200.

[0053] III. Concrete pouring

[0054] Inspection of the bottom formwork:

[0055] Before pouring the concrete 400, check the fixation of the bottom formwork 200 and the aluminum plate 300 again to ensure there is no loosening or deformation.

[0056] Concrete pouring:

[0057] Carry out operations according to the normal concrete 400 pouring process, pay attention to controlling the pouring speed and vibration intensity, and avoid impacting the aluminum plate 300.

[0058] Curing:

[0059] After the concrete 400 is poured, carry out curing according to the specification requirements to ensure that the concrete 400 reaches the specified strength.

[0060] IV. Subsequent treatment

[0061] Form removal and aluminum plate 300 recycling:

[0062] After the concrete 400 solidifies and reaches the specified strength, remove the bottom formwork 200 and the aluminum plate 300. The aluminum plate 300 needs to be properly stored for future use.

[0063] Groove inspection:

[0064] Check whether the size and depth of the groove formed at the joint of the composite slab 100 meet the design requirements.

[0065] Subsequent construction:

[0066] There is no need to roughen the joint of the composite slab 100, and subsequent construction steps such as ceiling plastering and decorative coating can be directly carried out.

[0067] V. Quality control and acceptance

[0068] Quality control:

[0069] During the construction process, strengthen the quality control of key links such as the transformation of the bottom formwork 200, the fixation of the aluminum plate 300, and the pouring of the concrete 400 to ensure that the construction quality meets the design requirements.

[0070] Acceptance:

[0071] After the construction is completed, organize relevant personnel for acceptance, and check whether the groove size, depth, and subsequent construction quality meet the specification requirements.

[0072] Through the above step-by-step construction introduction, it can ensure the smooth implementation of the construction method for preventing convex platforms at the joint of the composite slab 100 of the prefabricated building and achieve the expected construction effect.

[0073] Example 2

[0074] Please refer to Figures 2 to 3 as shown.

[0075] The difference between this embodiment and the first embodiment is only that: the bottom casting formwork at the joint of the composite slab of this prefabricated building further includes a rubber layer 500 and an adjusting assembly.

[0076] The rubber layer 500 covers the outside of the thick aluminum plate 300 (backing plate), and the two side edges of the rubber layer 500 respectively extend into the space between the bottom formwork 200 and the composite slab 100.

[0077] The adjusting assembly includes an adjusting bolt 610 and an adjusting nut 620. The adjusting nut 620 is fixedly connected to the bottom formwork 200. The adjusting bolt 610 is matched with the adjusting nut 620, and the end of the adjusting bolt 610 penetrates through the bottom formwork 200 and abuts against the lower end surface of the thick aluminum plate 300 (backing plate).

[0078] The usage method of this embodiment is the same as that of the first embodiment, and similar technical effects can also be achieved. Moreover, in this embodiment, the position of the thick aluminum plate 300 (backing plate) can be adjusted through the adjusting assembly, and thus the depth of the formed groove can be adjusted.

[0079] The above are only two implementation manners of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several variations and improvements can still be made, and these should also be regarded as belonging to the protection scope of the present utility model.

Claims

1. A bottom casting formwork at the joint of precast building composite slabs, characterized in that: It includes a backing plate and a bottom formwork (200). The bottom formwork (200) is fixed to the lower side of the joint of two adjacent composite slabs (100). The backing plate is arranged on the bottom formwork (200), and the backing plate is located inside the joint of two adjacent composite slabs (100).

2. The bottom casting formwork at the joint of the composite slab of the prefabricated building according to claim 1, wherein: The backing plate is an aluminum plate (300).

3. The bottom casting formwork at the joint of the composite slab of the prefabricated building according to claim 2, characterized in that: The height of the backing plate is 3 - 4 mm.

4. The bottom casting formwork at the joint of precast building composite slabs according to claim 1, characterized in that: It further includes a rubber layer (500). The rubber layer (500) covers the outer side of the backing plate, and the two side edges of the rubber layer (500) respectively extend into the space between the bottom formwork (200) and the composite slab (100).

5. The bottom casting formwork at the joint of precast building composite slabs according to claim 4, characterized in that: It further includes an adjusting assembly. The adjusting assembly includes an adjusting bolt (610) and an adjusting nut (620). The adjusting nut (620) is fixedly connected to the bottom formwork (200). The adjusting bolt (610) is matched with the adjusting nut (620), and the end of the adjusting bolt (610) penetrates through the bottom formwork (200) and abuts against the lower end face of the backing plate.

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