Anti-crack fabricated floor slab

Abstract

The utility model belongs to the technical field of assembly type floor slabs, and discloses an anti-crack assembly type floor slab which comprises an open web, and the top and the bottom of the open web are connected with a top concrete slab and a bottom concrete slab respectively. A first fiber reinforced composite material layer is arranged on the outer surface of the top concrete plate, and a second fiber reinforced composite material layer is arranged on the outer surface of the bottom concrete plate, and a third fiber reinforced composite material layer is arranged on the outer surface of the bottom concrete plate. The characteristics of high strength and high elastic modulus of fiber reinforced composite materials are utilized, tensile stress generated in the using process of the floor slab can be effectively borne, deformation of concrete is limited, occurrence and expansion of cracks are delayed, and the third fiber reinforced composite material layer can enhance the tensile strength of the concrete around the hollow holes. The anti-cracking performance of the floor is greatly improved through double protection of the inner surface and the outer surface of the overall floor structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of assembly type floor, specifically is a kind of anti-cracking assembly type floor. BACKGROUND

[0002] Under the background of vigorously promoting assembly type building in construction industry, assembly type floor is widely applied with the advantages of high construction efficiency and high industrialization degree, however, traditional assembly type floor exposes many problems in actual use process.

[0003] Firstly, since assembly type floor is mostly spliced by prefabricated component, its integrity is relatively poor compared with cast-in-place floor, under the influence of temperature change, concrete shrinkage and other factors, crack is easily generated, which reduces the durability and safety of floor, and even affects the normal use function of building;Secondly, the sound insulation and thermal insulation performance of ordinary assembly type floor is limited, which is difficult to meet the requirements of modern building on comfort and energy saving;For example, in residential building, poor floor sound insulation effect will lead to mutual interference between tenants;In public building, insufficient thermal insulation performance will increase air conditioning energy consumption.

[0004] In addition, although the hollow structure of traditional assembly type floor can reduce self weight, stress concentration is easily generated around hollow hole when stressed, which further aggravates the risk of crack generation.

[0005] Therefore, an anti-cracking assembly type floor is proposed for the above problems. CONTENT OF UTILITY MODEL

[0006] To solve the problems proposed in the above background technology, the utility model provides an anti-cracking assembly type floor, which has the advantages of enhancing the crack resistance and sound insulation and thermal insulation performance of assembly type floor.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: an anti-cracking assembly type floor, comprising a hollow slab, a top concrete slab and a bottom concrete slab are connected to the top and bottom of the hollow slab respectively, a first fiber reinforced composite material layer and a second fiber reinforced composite material layer are arranged on the outer surfaces of the top concrete slab and the bottom concrete slab respectively, a hollow hole is formed on the hollow slab, and a third fiber reinforced composite material layer is arranged on the inner wall of the hollow hole.

[0008] Preferably, a middle steel reinforcement frame is arranged in the hollow slab, and the end of the middle steel reinforcement frame penetrates the hollow slab.

[0009] Preferably, a top steel reinforcement frame is arranged in the top concrete slab, and the end of the top steel reinforcement frame penetrates the top concrete slab.

[0010] Preferably, a bottom steel reinforcement frame is arranged in the bottom concrete slab, and the end of the bottom steel reinforcement frame penetrates the bottom concrete slab.

[0011] Preferably, the middle steel reinforcement frame is connected to the top steel reinforcement frame, and the middle steel reinforcement frame is connected to the bottom steel reinforcement frame by multiple evenly distributed connecting steel bars.

[0012] Preferably, the hollow hole is filled with sound-insulating and heat-insulating filler.

[0013] Preferably, a tension rod is fixedly connected to the inner wall of the hollow hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by setting a first fiber-reinforced composite material layer and a second fiber-reinforced composite material layer, utilizes the high strength and high elastic modulus of fiber-reinforced composite materials to effectively bear the tensile stress generated by the floor slab during use. When the floor slab is subjected to external loads, temperature changes, or concrete shrinkage, the fiber-reinforced composite material layer can limit the deformation of the concrete and delay the appearance and propagation of cracks. At the same time, a third fiber-reinforced composite material layer is set on the inner wall of the hollow hole of the web slab, which can enhance the tensile strength of the concrete around the hollow hole and avoid cracks caused by stress concentration at the hollow hole. With double protection from the inner and outer surfaces of the overall structure of the floor slab, the crack resistance of the floor slab is greatly improved and the service life of the floor slab is extended.

[0016] 2. This utility model fills the hollow holes with sound-insulating and heat-insulating materials, such as polystyrene foam board and polyurethane foam. These materials have good sound insulation and heat insulation properties. The sound insulation material can effectively absorb and block the transmission of sound, reduce noise interference between floors, and create a quiet and comfortable indoor environment for users. The heat insulation material can reduce heat transfer, reduce the energy loss of the building, improve the energy efficiency of the building, and meet the requirements of modern buildings for green energy saving.

[0017] 3. This utility model, by setting up a composite structure consisting of a hollow web slab and concrete slabs at its top and bottom, combined with a fiber-reinforced composite material layer, enables the floor slab to reduce its self-weight while possessing high structural strength and stability. The hollow web slab design reduces the weight of the floor slab itself, thereby reducing the bearing pressure on the building foundation; the concrete slabs at the top and bottom and the fiber-reinforced composite material layer ensure the overall stress performance of the floor slab when bearing loads. This structural form can effectively distribute the load, allowing the floor slab to maintain good mechanical properties even under large spans or heavy loads, meeting the usage requirements of various buildings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the separation structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the middle steel reinforcement frame, the top steel reinforcement frame, and the bottom steel reinforcement frame of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the hollow web plate of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the tension rod of this utility model.

[0023] In the diagram: 1. Hollow web slab; 2. Top concrete slab; 3. Bottom concrete slab; 4. First fiber-reinforced composite material layer; 5. Second fiber-reinforced composite material layer; 6. Hollow hole; 7. Third fiber-reinforced composite material layer; 8. Middle steel reinforcement frame; 9. Top steel reinforcement frame; 10. Bottom steel reinforcement frame; 11. Connecting steel bars; 12. Sound insulation and heat insulation filler; 13. Tie rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 5As shown, this utility model provides a crack-resistant prefabricated floor slab, including a hollow slab 1. A top concrete slab 2 and a bottom concrete slab 3 are respectively connected to the top and bottom of the hollow slab 1. A first fiber-reinforced composite material layer 4 and a second fiber-reinforced composite material layer 5 are respectively disposed on the outer surfaces of the top concrete slab 2 and the bottom concrete slab 3. Hollow holes 6 are formed in the hollow slab 1, and a third fiber-reinforced composite material layer 7 is disposed on the inner wall of the hollow holes 6. The tensile strength of fiber-reinforced composite materials is typically much higher than that of ordinary building materials. For example, the tensile strength of carbon fiber reinforced composite materials can reach over 3000 MPa, several times that of ordinary steel bars. This allows it to effectively bear the tensile stress generated during the use of the floor slab, reducing the occurrence of cracks. Furthermore, fiber-reinforced composite materials have a high elastic modulus, enabling them to withstand large loads with relatively small deformations. When working in conjunction with concrete, they can limit concrete deformation, improve the overall stiffness of the floor slab, and thus enhance crack resistance. When the floor slab is subjected to external loads, temperature changes, or concrete shrinkage, the fiber-reinforced composite material layer can limit concrete deformation and delay the appearance and propagation of cracks. At the same time, the third fiber-reinforced composite material layer 7 is provided on the inner wall of the hollow hole 6 of the web slab 1, which can enhance the tensile strength of the concrete around the hollow hole 6 and prevent cracks from forming at the hollow hole 6 due to stress concentration. With double protection from the inner and outer surfaces of the overall floor slab structure, the crack resistance of the floor slab is greatly improved, and the service life of the floor slab is extended.

[0026] Specifically, a central steel reinforcement frame 8 is provided inside the hollow slab 1, and the end of the central steel reinforcement frame 8 penetrates through the hollow slab 1. The central steel reinforcement frame 8 enhances the stress strength of the hollow slab 1.

[0027] Furthermore, a top steel reinforcement frame 9 is provided inside the top concrete slab 2, and the end of the top steel reinforcement frame 9 penetrates through the top concrete slab 2, thereby enhancing the load-bearing strength of the top concrete slab 2.

[0028] Furthermore, a bottom steel reinforcement frame 10 is provided inside the bottom concrete slab 3, and the end of the bottom steel reinforcement frame 10 penetrates through the bottom concrete slab 3, thereby enhancing the load-bearing strength of the bottom concrete slab 3.

[0029] It is worth noting that the middle steel reinforcement frame 8 and the top steel reinforcement frame 9, as well as the middle steel reinforcement frame 8 and the bottom steel reinforcement frame 10, are connected by multiple evenly distributed connecting steel bars 11, so that the middle steel reinforcement frame 8, the top steel reinforcement frame 9, and the bottom steel reinforcement frame 10 are connected to each other, thereby enhancing the connection strength between the hollow slab 1, the top concrete slab 2, and the bottom concrete slab 3, and making them form a stable whole.

[0030] It is worth noting that the hollow hole 6 is filled with sound-insulating and heat-insulating filler 12. The sound-insulating and heat-insulating filler 12 can be made of polystyrene foam board or extruded polystyrene foam board, polyurethane foam, perlite concrete or ceramsite concrete, etc. The sound insulation material can effectively absorb and block the transmission of sound, reduce noise interference between floors, and create a quiet and comfortable indoor environment for users; the heat insulation material can reduce heat transfer, reduce the energy loss of the building, improve the energy efficiency of the building, and meet the requirements of modern buildings for green energy saving.

[0031] It is worth mentioning that the inner wall of the hollow hole 6 is fixedly connected with a tie rod 13. The tie rod 13 can enhance the overall structural performance of the hollow floor slab and improve its bending and shear resistance. Especially under large loads, it can effectively prevent cracking and other damage phenomena in the concrete around the hollow hole 6, thereby improving the safety and reliability of the floor slab.

[0032] Working principle and process: By setting a first fiber-reinforced composite material layer 4 and a second fiber-reinforced composite material layer 5, the high strength and high elastic modulus of fiber-reinforced composite materials can effectively bear the tensile stress generated by the floor slab during use. When the floor slab is subjected to external loads, temperature changes, or concrete shrinkage, the fiber-reinforced composite material layer can limit the deformation of the concrete and delay the appearance and propagation of cracks. At the same time, a third fiber-reinforced composite material layer 7 is set on the inner wall of the hollow hole 6 of the web slab 1, which can enhance the tensile strength of the concrete around the hollow hole 6 and prevent cracks from forming at the hollow hole 6 due to stress concentration. This dual approach from the inner and outer surfaces of the overall floor slab structure... The protective structure greatly enhances the crack resistance of the floor slab and extends its service life. The composite structure, consisting of a hollow web slab 1 and concrete slabs at its top and bottom, combined with fiber-reinforced composite material layers, allows the floor slab to maintain high structural strength and stability while reducing its own weight. The hollow web slab 1 design reduces the floor slab's own weight, lowering the load-bearing pressure on the building foundation; the top and bottom concrete slabs and fiber-reinforced composite material layers ensure the overall stress performance of the floor slab under load. This structural form effectively distributes the load, allowing the floor slab to maintain good mechanical properties even under large spans or heavy loads, meeting the usage requirements of various buildings.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crack-resistant prefabricated floor slab, comprising a hollow web slab (1), characterized in that: The top and bottom of the hollow board (1) are respectively connected to a top concrete board (2) and a bottom concrete board (3). The outer surfaces of the top concrete board (2) and the bottom concrete board (3) are respectively provided with a first fiber reinforced composite material layer (4) and a second fiber reinforced composite material layer (5). A hollow hole (6) is formed on the hollow board (1), and a third fiber reinforced composite material layer (7) is provided on the inner wall of the hollow hole (6).

2. The crack-resistant prefabricated floor slab according to claim 1, characterized in that: A central steel reinforcement frame (8) is provided inside the hollow web plate (1), and the end of the central steel reinforcement frame (8) penetrates through the hollow web plate (1).

3. The crack-resistant prefabricated floor slab according to claim 2, characterized in that: A top steel reinforcement frame (9) is provided inside the top concrete slab (2), and the end of the top steel reinforcement frame (9) penetrates through the top concrete slab (2).

4. The crack-resistant prefabricated floor slab according to claim 3, characterized in that: A bottom steel reinforcement frame (10) is provided inside the bottom concrete slab (3), and the end of the bottom steel reinforcement frame (10) penetrates through the bottom concrete slab (3).

5. The crack-resistant prefabricated floor slab according to claim 4, characterized in that: The middle steel frame (8) and the top steel frame (9), as well as the middle steel frame (8) and the bottom steel frame (10), are connected by multiple evenly distributed connecting steel bars (11).

6. The crack-resistant prefabricated floor slab according to claim 1, characterized in that: The hollow hole (6) is filled with sound-insulating and heat-insulating filler (12).

7. The crack-resistant prefabricated floor slab according to claim 1, characterized in that: A tension rod (13) is fixedly connected to the inner wall of the hollow hole (6).

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