Fabricated floor slab

Abstract

The utility model provides an assembly type floor slab. The assembly type floor slab comprises a floor slab body and a supporting assembly arranged in the floor slab body. The floor slab body comprises an assembly type laminated slab, a thermal insulation concrete layer and an ultra-high performance concrete surface layer which are sequentially arranged from bottom to top, and a facing layer is selectively arranged above the ultra-high performance concrete surface layer; the supporting assembly comprises a plurality of truss steel bars arranged at intervals. The truss steel bars comprise upper chord steel bars, lower chord steel bars and web member steel bars; the upper chord steel bars are connected with the ultra-high performance concrete surface layer, and the lower chord steel bars are connected with the assembly type laminated slabs; the middle of the web member steel bar is bent to form a bent end, the web member steel bar penetrates through the thermal insulation concrete layer, the bent end is connected with the upper chord steel bar, and the two ends of the web member steel bar are connected with the lower chord steel bar to be matched with the lower chord steel bar to form a triangular structure. The assembly type floor slab is based on reasonable structural design, and has good physical performance, good bearing capacity and good use experience.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated buildings, and particularly relates to a prefabricated floor slab. Background Art

[0002] With the acceleration of the urbanization process and the deepening of the environmental protection concept, prefabricated buildings, including prefabricated floor slabs, are gradually changing the traditional cast-in-place building method and becoming a new trend in the modern construction industry. A prefabricated floor slab is a floor slab system that adopts industrial production and on-site paving construction. The prefabricated floor slab is prefabricated into standard modules in the factory and then transported to the construction site for assembly and installation. Therefore, it can greatly reduce the construction time-consuming and greatly improve the construction efficiency. The prefabricated floor slab is convenient for installation and disassembly, so it can be recycled and reduce resource consumption.

[0003] However, for the existing prefabricated floor slabs at present, although they have certain advantages in construction efficiency, due to the unreasonable design of their internal structures, problems such as insufficient bearing strength and non-durable floor slabs often occur, which greatly affects the use experience. Therefore, it is urgent to propose a solution to solve at least one of the above problems. Summary of the Utility Model

[0004] In order to overcome the defects of the above-mentioned prior art, the utility model provides a prefabricated floor slab, and the specific technical solution is as follows:

[0005] A prefabricated floor slab provided by the utility model includes a floor slab body and a support component arranged in the floor slab body;

[0006] The floor slab body includes a prefabricated composite slab, a thermal insulation concrete layer and a surface layer which are arranged in sequence from bottom to top; the surface layer includes a UHPC surface layer;

[0007] The support component includes a plurality of truss bars arranged at intervals; the truss bar includes an upper chord bar, a lower chord bar and a web bar; the upper chord bar is connected to the UHPC surface layer, and the lower chord bar is connected to the prefabricated composite slab;

[0008] The middle part of the web bar is bent to form a bent end. The web bar penetrates through the thermal insulation concrete layer, and the bent end is connected to the upper chord bar. Both ends of the web bar are connected to the lower chord bar to form a triangular structure in cooperation with the lower chord bar.

[0009] In a specific embodiment, the support component further includes a plurality of first reinforcing bars and a plurality of second reinforcing bars;

[0010] A plurality of the first reinforcing bars are arranged at intervals along the extending direction of the upper chord bar, and each of the first reinforcing bars is staggeredly connected to the upper chord bars of at least two adjacent truss bars; a plurality of the second reinforcing bars are arranged at intervals along the extending direction of the lower chord bar, and each of the second reinforcing bars is staggeredly connected to the lower chord bars of at least two adjacent truss bars.

[0011] In a specific embodiment, the surface layer further includes a decorative layer disposed on the UHPC surface layer, and the upper chord bar is also connected to the decorative layer.

[0012] In a specific embodiment, the thickness of the precast composite slab ranges from 15 mm to 25 mm; the compressive strength of the precast composite slab is greater than 80 Mpa, and the flexural strength is greater than 10 Mpa.

[0013] In a specific embodiment, the thermal insulation concrete layer includes a polystyrene particle lightweight concrete layer and / or a lightweight high-strength concrete layer.

[0014] In a specific embodiment, the thickness of the thermal insulation concrete layer ranges from 30 mm to 70 mm, the bulk density is 600 - 1000 kg / m 3 , the compressive strength is greater than 5 Mpa, and the flexural strength is greater than 0.5 Mpa.

[0015] In a specific embodiment, the thickness of the UHPC surface layer ranges from 20 mm to 50 mm; the compressive strength of the UHPC surface layer is not less than 60 Mpa, and the flexural strength is not less than 10 Mpa.

[0016] In a specific embodiment, the decorative layer includes any one of a grindstone layer and a floor paint layer.

[0017] In a specific embodiment, the interval distance between adjacent truss bars ranges from 150 mm to 300 mm.

[0018] In a specific embodiment, the interval distances between adjacent first reinforcing bars and between adjacent second reinforcing bars are both in the range of 150 mm to 300 mm; the diameter of the lower chord bar is 6 - 10 mm; the diameter of the upper chord bar is 8 - 12 mm; the diameter of the web bar is 4.5 - 5.5 mm.

[0019] The utility model has at least the following beneficial effects:

[0020] An assembled floor slab provided by the utility model, on the one hand, based on the reasonable structural setting of the support component, through the reasonable structure of the truss reinforcement itself, and the mutual cooperation of the truss reinforcement, the first reinforcement and the second reinforcement, the floor slab body has good load-bearing capacity, overcoming the problem of poor load-bearing capacity of the existing assembled floor slab. Moreover, the support component structure of the utility model is relatively simple, and the construction process of combining prefabrication and cast-in-place is adopted, so the building process is relatively simple, the production efficiency is high, and at the same time, it is more cost-saving and more environmentally friendly. On the other hand, based on the layout design of each structural layer and the reasonable thickness design of each structural layer, the floor slab body achieves light weight while ensuring good load-bearing capacity and durability, and has a good use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a cross-sectional view of the floor slab in one embodiment;

[0023] Figure 2 It is a cross-sectional view of the floor slab in another embodiment;

[0024] Figure 3 It is a structural diagram of the support component in one embodiment;

[0025] Figure 4 It is a structural diagram of the support component in another embodiment.

[0026] REFERENCE MARKS:

[0027] 1 - Support component; 11 - Truss reinforcement; 111 - Upper chord reinforcement; 112 - Lower chord reinforcement; 113 - Web member reinforcement; 1131 - Bent end; 12 - First reinforcement; 13 - Second reinforcement; 2 - Floor slab body; 21 - Assembled composite slab; 22 - Insulating concrete layer; 23 - Surface layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In the following text, various embodiments of the present utility model will be described more comprehensively. The present utility model can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present utility model to the specific embodiments disclosed herein, but the present utility model should be understood to cover all adjustments, equivalents and / or alternative solutions falling within the spirit and scope of the various embodiments of the present utility model.

[0029] In the following, the term "comprising" or "may comprise" that may be used in various embodiments of the present invention indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Further, as used in various embodiments of the present invention, the terms "comprising", "having", and their cognates are only intended to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing items, and should not be construed as precluding the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items first.

[0030] In various embodiments of the present invention, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the recited words. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0031] Expressions (such as "first", "second", etc.) used in various embodiments of the present invention may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present invention, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0032] It should be noted that in the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium; it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Please refer to Figures 1 to 4, the present utility model provides a prefabricated floor slab, which includes a floor slab body 2 and a support component 1 arranged in the floor slab body 2. The support component 1 is used to support the floor slab body 2 to improve the bearing capacity of the floor slab body 2. The floor slab body 2 includes a prefabricated composite slab 21, a thermal insulation concrete layer 22 and a surface layer 23 arranged in sequence from bottom to top. Among them, the surface layer 23 may include a UHPC surface layer, or include a UHPC surface layer and a decorative layer arranged on the UHPC surface layer. UHPC is ultra-high performance concrete (Ultra-High Performance Concrete, UHPC), and the decorative layer may include any one of a grindstone layer and a floor paint layer.

[0034] Specifically, the prefabricated composite slab 21, the thermal insulation concrete layer 22 and the UHPC surface layer are fixedly connected in sequence. In practical applications, the prefabricated composite slab 21 is laid integrally, and the thermal insulation concrete layer 22 is poured on the prefabricated composite slab 21 to achieve fixed connection. After the thermal insulation concrete layer 22 is poured and cured, the UHPC surface layer is cast again to achieve the fixed connection between the UHPC surface layer and the thermal insulation concrete layer 22. Whether to set a decorative layer on the UHPC surface layer can be determined according to the actual elevation and space, and no specific limitation is made.

[0035] Further, the support component 1 includes a plurality of truss steel bars 11 arranged at intervals. The truss steel bar 11 includes an upper chord steel bar 111, a lower chord steel bar 112 and a web member steel bar 113. Among them, the upper chord steel bar 111 is connected to the UHPC surface layer, and the lower chord steel bar 112 is connected to the prefabricated composite slab 21. In the case of including a decorative layer, the upper chord steel bar 111 is also connected to the decorative layer. The middle part of the web member steel bar 113 is bent to form a bent end 1131. The web member steel bar 113 penetrates through the thermal insulation concrete layer 22, and its bent end 1131 is connected to the upper chord steel bar 111. The web member steel bar 113 has two ends, and both ends are connected to the lower chord steel bar 112. Based on the bending of the web member steel bar 113, it can cooperate with the lower chord steel bar 112 to form a triangular structure. It can be understood that through the formed triangular structure, the bearing strength of the prefabricated floor slab of the present utility model is improved.

[0036] In this embodiment, please refer to Figure 1 and Figure 3, the upper chord steel bars 111 and the lower chord steel bars 112 are parallel and have the same extension direction. The upper chord steel bars 111 extend in the surface layer 23 (which can be between the UHPC surface layer and the decorative surface layer) and are fixedly connected to the surface layer 23. The lower chord steel bars 112 extend in the precast composite slab 21 and are fixedly connected to the precast composite slab 21. Each truss steel bar 11 includes one upper chord steel bar 111, two lower chord steel bars 112, and multiple web steel bars 113. Each lower chord steel bar 112 is respectively connected to multiple web steel bars 113 in the manner described above. The bent ends 1131 of all the web steel bars 113 are connected to the upper chord steel bar 111. The multiple web steel bars 113 are arranged at intervals along the extension direction of the upper chord steel bar 111 and the lower chord steel bar 112. The adjacent web steel bars 113 can be connected to each other or not.

[0037] In a specific embodiment, the support assembly 1 further includes multiple first reinforcing steel bars 12 and multiple second reinforcing steel bars 13. Specifically, please refer to Figure 2 and Figure 4 , the multiple first reinforcing steel bars 12 are arranged at intervals along the extension direction of the upper chord steel bar 111, and each first reinforcing steel bar 12 is at least staggeredly connected to the upper chord steel bars 111 of the adjacent two truss steel bars 11. Exemplarily, each first reinforcing steel bar 12 can be staggeredly connected to the upper chord steel bars 111 of all the truss steel bars 11, and the staggering angle between the first reinforcing steel bar 12 and the upper chord steel bar 111 can be 90°. The connection manner between the first reinforcing steel bar 12 and the upper chord steel bar 111 can be welding or binding.

[0038] The multiple second reinforcing steel bars 13 are arranged at intervals along the extension direction of the lower chord steel bar 112, and each second reinforcing steel bar 13 is at least staggeredly connected to the lower chord steel bars 112 of the adjacent two truss steel bars 11. Exemplarily, each second reinforcing steel bar 13 can be staggeredly connected to the lower chord steel bars 112 of all the truss steel bars 11, and the staggering angle between the second reinforcing steel bar 13 and the lower chord steel bar 112 can be 90°. The connection manner between the second reinforcing steel bar 13 and the lower chord steel bar 112 can be welding or binding.

[0039] In addition, the spacing distance between adjacent first reinforcing steel bars 12 and the spacing distance between adjacent second reinforcing steel bars 13 can both be between 150 mm and 300 mm. The spacing distance can be flexibly set according to actual requirements and specific application scenarios and is not specifically limited herein. In actual applications, the spacing distance between adjacent truss steel bars 11 can also be between 150 mm and 300 mm, and preferably the same as the spacing distance between adjacent first reinforcing steel bars 12 and adjacent second reinforcing steel bars 13.

[0040] In this embodiment, the dimensions of the prefabricated composite slab 21, the thermal insulation concrete layer 22, and the surface layer 23 can all reach 1.2 m × 3.6 m. The extension lengths of the upper chord reinforcement 111 and the lower chord reinforcement 112 are adapted to 3.6 m (slightly shorter than 3.6 m), and the extension lengths of the first reinforcing bars 12 and the second reinforcing bars 13 are adapted to 1.2 m (slightly shorter than 1.2 m). In one case, the first reinforcing bars 12 and the second reinforcing bars 13 can include a number of sub-reinforcing bars, and the first reinforcing bars 12 and the second reinforcing bars 13 are formed by connecting the heads and tails of the number of sub-reinforcing bars. The way of connecting the heads and tails can be welding, for example.

[0041] In a specific embodiment, the prefabricated composite slab 21 can adopt a high-performance thin composite slab to achieve the lightweight of the floor slab on the basis of not reducing the bearing capacity, which is convenient for the transportation of the floor slab. Optionally, the thickness range of the prefabricated composite slab can be between 15 mm and 25 mm, preferably 20 mm. Preferably, the compressive strength of the prefabricated composite slab is greater than 80 Mpa, and the flexural strength is greater than 10 Mpa.

[0042] In a specific embodiment, the thermal insulation concrete layer 22 can include a polystyrene particle lightweight concrete layer and / or a lightweight high-strength concrete layer. Specifically, the polystyrene particle lightweight concrete is a new type of thermal insulation product formed by adding polystyrene particles to the modified ordinary concrete and solidifying through cement. The relative density of the polystyrene particles is extremely low, only 8 - 21 kg / m 3 , which makes the density of the polystyrene particle lightweight concrete much lower than that of the traditional concrete, facilitating the reduction of the self-weight of the floor slab and the load of the prefabricated composite slab 21. The lightweight high-strength concrete refers to adding a certain proportion of lightweight aggregates and admixtures to the ordinary concrete. By optimizing the mix ratio and preparation process, the concrete can have a lower density and weight while ensuring strength and durability.

[0043] Exemplarily, the thermal insulation concrete layer 22 can include one or more of the polystyrene particle lightweight concrete layer and the lightweight high-strength concrete layer, and the final thickness range is between 30 mm and 70 mm, the bulk density is 600 - 1000 kg / m 3 , the compressive strength is greater than 5 Mpa, and the flexural strength is greater than 0.5 Mpa.

[0044] In a specific embodiment, the thickness range of the UHPC surface layer is between 20 mm and 50 mm, and the compressive strength of the UHPC surface layer is not less than 60 Mpa, and the flexural strength is not less than 10 Mpa. In practical applications, by pouring the thermal insulation concrete layer 22 and the ultra-high performance concrete layer in sequence, the ultra-high performance concrete layer and the thermal insulation concrete layer 22 are fixedly connected to each other, and the ultra-high performance concrete layer wraps the upper chord reinforcement 111. It should be noted that ultra-high performance concrete is a special concrete with high strength, high durability, low porosity, and strong erosion resistance. Based on the setting of the ultra-high performance concrete layer, the overall floor has higher physical properties, stronger load-bearing capacity, and the overall strength can reach the strength of C60 concrete, allowing vehicles to pass through; the Mohs hardness can also reach 5-6 levels, making it more wear-resistant and having a longer service life.

[0045] In a specific embodiment, through the 15-mm precast composite slab 21, the 75-mm thermal insulation concrete layer 22, and the 30-mm UHPC surface layer, the finally formed floor slab body 2 has a thickness of 12 cm. Moreover, based on the structural properties of the high-performance thin composite slab, the polystyrene particle lightweight concrete layer or the lightweight high-strength concrete layer, and the ultra-high performance concrete layer, the weight of the finally formed floor slab body 2 is about 140 kg / ㎡, while the weight of the traditional precast concrete slab is about 280 kg / ㎡. Compared with the traditional technology, the weight of this application is reduced by about 50%, making it lighter.

[0046] In summary, for the precast floor slab provided by the present utility model, on the one hand, based on the reasonable structural setting of the support component 1, through the reasonable structure of the truss reinforcement 11 itself, and the mutual cooperation of the truss reinforcement 11, the first reinforcement 12, and the second reinforcement 13, the floor slab body 2 has good load-bearing capacity, overcoming the problem of poor load-bearing capacity of the existing precast floor slabs. Moreover, the structure of the support component 1 of the present utility model is relatively simple, and a construction process combining prefabrication and in-situ casting is adopted. Therefore, the construction process is relatively simple, the production efficiency is high, and at the same time, it is more cost-saving and more environmentally friendly. On the other hand, based on the layout design of each structural layer of the floor slab body 2 and the reasonable thickness design of each structural layer, while achieving lightweight, it also ensures good load-bearing capacity and durability, providing a good user experience.

[0047] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily essential for implementing the present utility model.

[0048] Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more devices different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0049] The above serial numbers of the present utility model are only for description and do not represent the advantages or disadvantages of the implementation scenario.

[0050] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An assembled floor slab, characterized in that, It includes a floor slab body and a support component arranged in the floor slab body; The floor slab body includes a prefabricated composite slab, a thermal insulation concrete layer, and a surface layer arranged in sequence from bottom to top; the surface layer includes a UHPC surface layer; The support component includes a plurality of truss steel bars arranged at intervals; the truss steel bars include upper chord steel bars, lower chord steel bars, and web steel bars; the upper chord steel bars are connected to the UHPC surface layer, and the lower chord steel bars are connected to the prefabricated composite slab; The middle of the web steel bar is bent to form a bent end. The web steel bar penetrates through the thermal insulation concrete layer, and the bent end is connected to the upper chord steel bar. Both ends of the web steel bar are connected to the lower chord steel bar to cooperate with the lower chord steel bar to form a triangular structure.

2. The prefabricated floor slab according to claim 1, characterized in that, The support component further includes a plurality of first reinforcing steel bars and a plurality of second reinforcing steel bars; The plurality of first reinforcing steel bars are arranged at intervals along the extension direction of the upper chord steel bars, and each first reinforcing steel bar is at least staggeredly connected to the upper chord steel bars of two adjacent truss steel bars; the plurality of second reinforcing steel bars are arranged at intervals along the extension direction of the lower chord steel bars, and each second reinforcing steel bar is at least staggeredly connected to the lower chord steel bars of two adjacent truss steel bars.

3. The prefabricated floor slab according to claim 1, characterized in that, The surface layer further includes a decorative surface layer arranged on the UHPC surface layer, and the upper chord steel bar is also connected to the decorative surface layer.

4. A prefabricated floor slab according to claim 1, characterized in that, The thickness of the prefabricated composite slab ranges from 15 mm to 25 mm; the compressive strength of the prefabricated composite slab is greater than 80 Mpa, and the flexural strength is greater than 10 Mpa.

5. A prefabricated floor slab according to claim 1, characterized in that, The thermal insulation concrete layer includes a polystyrene particle lightweight concrete layer and / or a lightweight high-strength concrete layer.

6. The prefabricated floor slab according to claim 1, characterized in that, The thickness range of the thermal insulation concrete layer is between 30 mm and 70 mm, the bulk density is 600 - 1000 kg / m 3 , the compressive strength is greater than 5 Mpa, and the flexural strength is greater than 0.5 Mpa.

7. The prefabricated floor slab according to claim 1, characterized in that, The thickness of the UHPC surface layer ranges from 20 mm to 50 mm; the compressive strength of the UHCP surface layer is not less than 60 Mpa, and the flexural strength is not less than 10 Mpa.

8. The prefabricated floor slab according to claim 3, characterized in that, The decorative surface layer includes any one of a grindstone layer and a floor paint layer.

9. A prefabricated floor slab according to claim 1, characterized in that, The spacing distance between adjacent truss steel bars is between 150 mm and 300 mm.

10. The prefabricated floor slab according to claim 2, characterized in that, The spacing distances between adjacent first reinforcing steel bars and between adjacent second reinforcing steel bars are both between 150 mm and 300 mm; the diameter of the lower chord steel bar is 6 - 10 mm; the diameter of the upper chord steel bar is 8 - 12 mm; the diameter of the web steel bar is 4.5 - 5.5 mm.

Images