A prefabricated building composite floor

Abstract

The utility model relates to the technical field of fabricated building, especially a composite floor for fabricated building. The utility model discloses a bottom plate and a plurality of concrete ribs which are parallel and interval arranged along the length direction of the bottom plate, the concrete ribs are same in structure, each concrete rib comprises a steel formwork, a first concrete layer and two groups of hoisting components, the steel formwork extends along the width direction of the bottom plate, and the bottom of the steel formwork is embedded in the top of the bottom plate, the two groups of hoisting components are same in structure and are respectively located at the two ends of the steel formwork, and the two ends of each group of hoisting components are respectively embedded in the bottom plate, the first concrete layer is cast in the inside of the steel formwork to form an integrated structure with the steel formwork, the bottom plate and the two groups of hoisting components. By embedding a plurality of steel formworks in the top of the bottom plate, the rigidity and strength of the composite floor are improved, the composite floor does not need to be supported by a temporary support structure during assembly, and the assembly efficiency of the composite floor is improved.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to a composite floor slab for prefabricated buildings. Background Technology

[0002] Composite floor slabs in prefabricated buildings have been widely used in practical projects due to their advantages such as reasonable structure, convenient construction, and controllable quality. However, as prefabricated building systems gradually develop towards higher integration and rapid construction, the limitations of traditional composite floor slabs are becoming increasingly apparent, especially in prefabricated buildings.

[0003] Traditional composite floor slabs require temporary support structures (such as steel or wood supports) to be installed underneath them during on-site construction to ensure structural stability and the quality of post-cast layer formation. These support structures often encroach on the internal space of the module, making it impossible to complete the interior decoration work in the prefabrication factory stage in advance. This seriously restricts the core advantages of prefabricated buildings, such as high prefabrication rate and high decoration completion rate.

[0004] Furthermore, during the construction of prefabricated buildings, each module unit often needs to achieve structural closure and spatial shaping within a short period of time. Traditional composite floor slabs, which require support, have relatively low floor slab stiffness. During hoisting, composite floor slabs are prone to cracking and peeling, resulting in low hoisting stability. Especially in high-rise building projects, the layout, dismantling, and reuse of floor slab support systems will greatly increase the complexity of construction procedures and safety risks, which is detrimental to standardized construction management and on-site safety control.

[0005] Therefore, in order to solve the problems of spatial obstruction, low efficiency and impact on decoration caused by the reliance on temporary supports in traditional composite floor slabs in prefabricated buildings, there is an urgent need for a new type of composite floor slab structure with high rigidity, no support required, and good stress performance and installation adaptability. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a composite floor slab for prefabricated buildings, which solves the technical problems of low stiffness and low assembly efficiency of traditional composite floor slabs.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] This utility model provides a composite floor slab for prefabricated buildings, comprising a horizontally arranged base plate and a plurality of structurally identical concrete ribs arranged parallel and spaced along the length of the base plate. Each concrete rib includes a steel formwork, a first concrete layer, and two sets of hoisting assemblies. The steel formwork extends along the width of the base plate, and its bottom is embedded in the top of the base plate. The two sets of hoisting assemblies are structurally identical and located at both ends of the steel formwork, with both ends of each set of hoisting assemblies embedded in the base plate. The middle part of each hoisting assembly is a hoisting point area that protrudes from the top of the steel formwork. The first concrete layer is poured inside the steel formwork to form an integral structure of the steel formwork, the base plate, and the two sets of hoisting assemblies.

[0011] Preferably, the steel formwork includes two long ribs, both of which are C-shaped steel, and multiple stiffening ribs; both long ribs extend along the width direction of the base plate and are arranged opposite to each other; multiple stiffening ribs are fixedly connected between the two long ribs, and the multiple stiffening ribs and the two long ribs form multiple rectangular structures; the bottoms of the two long ribs and the multiple stiffening ribs are all pre-embedded in the top of the base plate, and the first concrete layer is poured into the multiple rectangular structures.

[0012] Preferably, the steel template further includes two angle steels; both angle steels extend along the length of the long ribs and are located on opposite sides of the two long ribs respectively; the vertical sides of the two angle steels are fixedly connected to their corresponding long ribs by self-tapping screws; the horizontal sides of the two angle steels are flush with the bottom edges of the two long ribs; and the bottoms of the two angle steels are embedded in the top of the base plate.

[0013] Preferably, the steel template further includes two horizontally arranged steel plates; both steel plates extend along the length of the long ribs and are respectively located at the bottom of the two long ribs, and the two steel plates are respectively fixedly connected to the bottom of their corresponding long ribs by self-tapping screws, and the opposite sides of the two steel plates extend beyond the opposite sides of the two long ribs; both steel plates are pre-embedded in the top of the base plate.

[0014] Preferably, the steel formwork includes two long ribs of Z-shaped steel, multiple stiffening ribs of C-shaped steel, and two angle steels; both long ribs are vertically arranged, extending along the width direction of the base plate, and are arranged opposite to each other; the multiple stiffening ribs are horizontally arranged, perpendicular to the two long ribs and located between them, with both ends of the multiple stiffening ribs fixedly connected to the opposite sidewalls of the two long ribs, and the openings of the multiple stiffening ribs facing the length direction of the base plate and forming multiple rectangular structures with the two long ribs; both angle steels extend along the length direction of the long ribs and are located between them, are arranged opposite to each other, and their vertical sides are fixedly connected to the inner wall of their corresponding long ribs by self-tapping screws, and the horizontal sides of the two angle steels are flush with the bottom edges of the two long ribs; the bottoms of the two long ribs, the multiple stiffening ribs, and the two angle steels are all embedded in the top of the base plate, and the first concrete layer is poured within the multiple rectangular structures.

[0015] Preferably, the hoisting assembly includes at least two identical hoisting rods; the at least two hoisting rods are arranged parallel to each other along the arrangement direction of the plurality of steel templates, the two ends of the hoisting rods are pre-embedded in the top of the base plate and are located inside and outside the steel template respectively, and the middle part of the two hoisting rods protrudes from the steel template and is fixedly connected to each other at the protruding position.

[0016] Preferably, the suspension rod includes a first L-shaped bar, a horizontal bar, and a second L-shaped bar connected sequentially along the width direction of the base plate; the first L-shaped bar is located inside the steel formwork, the horizontal bar is located above the steel formwork, and the second L-shaped bar is located outside the steel formwork; the horizontal sections of the first L-shaped bar and the second L-shaped bar are both embedded in the top of the base plate; the horizontal bar of the two suspension rods is fixedly connected to each other, and it is the suspension point area.

[0017] Preferably, at least two reinforcing bars are tied to the top of both the first L-shaped bars and the top of both second L-shaped bars, and there is a gap between the two first L-shaped bars and between the two second L-shaped bars in the two suspension bars.

[0018] Preferably, the base plate includes a second concrete layer, a reinforcing mesh, and multiple spacers; the multiple spacers extend along the extension direction of the steel formwork and are all tied to the reinforcing mesh and located at the top of the steel mesh; at least two spacers are provided below each steel formwork, and the bottom of each steel formwork is abutted against its corresponding at least two spacers to limit the pre-embedded depth of the bottom of the steel formwork; the second concrete layer encloses the reinforcing mesh, the spacers, the bottom of the steel formwork, the horizontal section of the first L-shaped reinforcement, the horizontal section of the second L-shaped reinforcement, and the reinforcing bar; the horizontal sections of the first L-shaped reinforcement and the horizontal sections of the second L-shaped reinforcement are both tied together with the reinforcing mesh.

[0019] Preferably, the base plate further includes multiple reinforcing ribs; each of the steel templates has at least two reinforcing ribs at its bottom, each reinforcing rib extends along the length of the steel template and is tied together with the steel mesh; the reinforcing ribs are also embedded in the second concrete layer.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this utility model are:

[0022] This utility model discloses a prefabricated composite floor slab for prefabricated buildings. Multiple steel formwork panels are pre-embedded in the top of the base slab, and a first layer of concrete is poured within these panels. This creates an integrated structure between the steel formwork panels and the base slab. The rigidity and strength of the steel formwork panels enhance the rigidity and strength of the composite floor slab, ensuring structural stability during hoisting and improving its hoisting stability. This prevents cracking and spalling during hoisting, significantly improving the structural stability and reducing the damage rate of the composite floor slab. Furthermore, by increasing the rigidity and strength of the composite floor slab, temporary support structures are no longer required during assembly, improving assembly efficiency, reducing spatial obstruction caused by support structures, and lowering safety risks during assembly. By setting a set of lifting components at each end of the steel formwork, and embedding both ends of the lifting components into the base plate, the stress in the lifting point area is more uniform when lifting the composite floor slab, which avoids cracking of the composite floor slab during lifting and reduces safety risks. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a prefabricated building composite floor slab according to the present invention.

[0024] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the steel formwork for a prefabricated building composite floor slab according to Embodiment 1 of the present invention.

[0025] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the steel formwork in Embodiment 2 of the present invention for a prefabricated building composite floor slab;

[0026] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the steel formwork in Embodiment 3 of the present invention for a prefabricated building composite floor slab;

[0027] Figure 5 This is a schematic diagram of the overall three-dimensional structure of the steel formwork in Embodiment 4 of the present invention, which is a composite floor slab for prefabricated buildings.

[0028] Figure 6 This is a schematic diagram of the overall three-dimensional structure of a hoisting assembly for a prefabricated building composite floor slab according to the present invention.

[0029] Figure 7 A schematic diagram of the overall three-dimensional structure of a prefabricated building composite floor slab excluding the second concrete layer, according to this utility model.

[0030] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point A in the middle.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1: Base plate; 11: Second concrete layer; 12: Steel mesh; 13: Spacing bar; 14: Reinforcing bar; 2: Concrete rib; 21: Steel formwork; 211: Long rib; 212: Stiffening rib; 213: Angle steel; 214: Steel plate; 22: First concrete layer; 23: Lifting assembly; 231: Lifting bar; 2311: First L-shaped bar; 2312: Horizontal bar; 2313: Second L-shaped bar; 3: Stamping bar. Detailed Implementation

[0033] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0034] Example 1

[0035] like Figure 1As shown, a prefabricated composite floor slab for prefabricated buildings in this embodiment includes a horizontally arranged base plate 1 and a plurality of structurally identical concrete ribs 2 arranged parallel to each other along the length of the base plate 1, and each concrete rib 2 is laid on the top of the base plate 1. Each concrete rib 2 includes a steel formwork 21, a first concrete layer 22, and two sets of hoisting assemblies 23.

[0036] Specifically, such as Figure 1 As shown, the steel formwork 21 extends along the width of the base plate 1, and its bottom is embedded in the top of the base plate 1. Two sets of lifting components 23 have identical structures and are located at both ends of the steel formwork 21, with both ends of each set of lifting components 23 embedded in the base plate 1. The middle part of the lifting component 23 is the lifting point area, which protrudes from the top of the steel formwork 21 and is used as a lifting point when the crane lifts the composite floor slab. The first concrete layer 22 is poured inside the steel formwork 21 to form an integrated structure of the steel formwork 21, the base plate 1, and the two sets of lifting components 23. By pre-embedding multiple steel formwork 21s on the top of the base slab 1 and pouring a first layer of concrete 22 inside the steel formwork 21s, the multiple steel formwork 21s and the base slab 1 form an integrated structure. The rigidity and strength of the steel formwork 21s are used to improve the rigidity and strength of the composite floor slab, ensuring structural stability during hoisting and improving the hoisting stability of the composite floor slab. This prevents cracking and spalling during hoisting, significantly improving the structural stability of the composite floor slab and reducing its damage rate. Furthermore, by increasing the rigidity and strength of the composite floor slab, temporary support structures are no longer needed during assembly, thus improving assembly efficiency, reducing spatial obstruction from support structures, and lowering safety risks during assembly. By setting a set of lifting components 23 at each end of the steel formwork 21, and embedding both ends of the lifting components 23 into the base plate 1, the stress on the lifting point area is more uniform when lifting the composite floor slab, avoiding cracking of the composite floor slab during lifting and reducing safety risks. Preferably, the depth of the steel formwork 21 embedded in the top of the base plate 1 is between 15mm and 25mm.

[0037] Furthermore, such as Figure 2As shown, the steel formwork 21 includes two long ribs 211, both C-shaped steel, and multiple stiffening ribs 212, which have excellent bending and torsional resistance. The two long ribs 211 extend along the width of the base plate 1 and are arranged opposite each other. Multiple stiffening ribs 212 are fixedly connected between the two long ribs 211, and the opening of each stiffening rib 212 faces the length direction of the base plate 1. The multiple stiffening ribs 212 and the two long ribs 211 form multiple rectangular structures. The multiple stiffening ribs 212 form the skeleton of the steel formwork 21 to improve its rigidity and strength. The bottoms of the two long ribs 211 and the multiple stiffening ribs 212 are pre-embedded in the top of the base plate 1, and the first concrete layer 22 is poured within the multiple rectangular structures. By setting two long ribs 211 and multiple stiffening ribs 212, with the stiffening ribs 212 serving as the skeleton of the steel formwork 21, and being poured into multiple rectangular structures through a first concrete layer 22, each concrete rib 2 forms an integral structure with the base slab 1, allowing the multiple concrete ribs 2 to more evenly distribute the stress on the floor slab. That is, during the pouring of the first concrete layer 22, the rectangular structure can restrict the flow of the first concrete layer 22, avoiding localized voids. After molding, the overall structure of the C-shaped steel long ribs 211, stiffening ribs 212, and the first concrete layer 22 can significantly enhance the crack resistance of the concrete ribs 2, effectively preventing cracking and deformation of the floor slab due to stress concentration, even during large-span hoisting in high-rise buildings.

[0038] Furthermore, such as Figure 1 , Figures 6-8 As shown, the lifting assembly 23 includes two identical lifting rods 231. Both lifting rods 231 are arranged parallel to the direction of the multiple steel templates 21. Both ends of the lifting rods 231 are embedded in the top of the base plate 1, located inside and outside the steel template 21 respectively. This enhances the strength of the two lifting rods 231 embedded in the top of the base plate 1, preventing the lifting rods 231 from detaching, peeling, or the base plate 1 from cracking due to insufficient connection strength when the crane lifts the composite floor slab through the lifting rods 231, thus further improving the lifting stability of the composite floor slab. The middle of the two lifting rods 231 protrudes from the steel template 21 and is fixedly connected to each other at the protruding position, forming an integral structure to share the force when the crane lifts the composite floor slab through the two lifting rods 231. Furthermore, this also prevents the composite floor slab from tilting or swaying during lifting, further improving the lifting stability of the composite floor slab.

[0039] Specifically, such as Figure 6As shown, the suspension rod 231 includes a first L-shaped bar 2311, a horizontal bar 2312, and a second L-shaped bar 2313 connected sequentially along the width direction of the base slab 1. The first L-shaped bar 2311 is located inside the steel formwork 21, the horizontal bar 2312 is located above the steel formwork 21, and the second L-shaped bar 2313 is located outside the steel formwork 21. The horizontal sections of the first L-shaped bar 2311 and the second L-shaped bar 2313 are both pre-embedded in the top of the base slab 1 to achieve an effective connection between the suspension rod 231 and the base slab 1. Furthermore, the first L-shaped bar 2311 and the second L-shaped bar 2313 are respectively pre-embedded in the top of the base slab 1 outside the steel formwork 21 and inside the steel formwork 21 to improve the connection strength between the suspension rod 231 and the base slab 1 and prevent the suspension rod 231 from falling off the base slab 1 when lifting the composite floor slab. The horizontal bars 2312 in the two lifting bars 231 are fixedly connected to each other, and they are the lifting point area, so as to realize the integrated structure of the two lifting bars 231, so as to share the force when the crane lifts the composite floor slab through the two lifting bars 231.

[0040] It should be noted that the stirrup 231 is formed by bending a single steel bar using a bending machine. Bending machines are commonly used equipment in engineering for bending steel bars. For example... Figure 6 As shown, the horizontal rib 2312 is shaped like a "<" and bends toward another adjacent hanger rib 231. The second L-shaped rib 2313 is inclined toward another hanger rib 231.

[0041] Furthermore, such as Figure 8 As shown, two reinforcing bars 3 are tied to the tops of the two first L-shaped reinforcing bars 2311 and the tops of the two second L-shaped reinforcing bars 2313, and the two reinforcing bars 3 are also embedded in the top of the base plate 1. The reinforcing bars 3 can apply resistance to the first L-shaped reinforcing bars 2311 and the second L-shaped reinforcing bars 2313, so that when the crane lifts the composite floor slab through the lifting bars 231, the reinforcing bars 3 can prevent the horizontal sections of the first L-shaped reinforcing bars 2311 and the second L-shaped reinforcing bars 2313 from separating from the base plate 1, thereby further improving the connection strength between the lifting bars 231 and the base plate 1 and the lifting stability. There is a gap between the two first L-shaped bars 2311 and the two second L-shaped bars 2313 in the two lifting bars 231, which allows the contact points between each reinforcing bar 3 and the horizontal sections of the two first L-shaped bars 2311 and the two second L-shaped bars 2313 to be spaced, thereby increasing the torque between each reinforcing bar 3 and its corresponding first L-shaped bar 2311 and second L-shaped bar 2313, so as to further improve the stability of the combined floor slab when lifted.

[0042] Furthermore, such as Figure 1 , Figure 7 and Figure 8As shown, the base slab 1 includes a second concrete layer 11, a steel mesh 12, and multiple reinforcing bars 13. The multiple reinforcing bars 13 extend along the extension direction of the steel formwork 21 and are all tied to the steel mesh 12 and located at the top of the steel mesh. At least two reinforcing bars 13 are provided below each steel formwork 21, and the bottom of each steel formwork 21 is abutted against its corresponding two reinforcing bars 13 to limit the pre-embedded depth of the bottom of the steel formwork 21. This prevents the steel formwork 21 from being too deeply embedded, which would weaken the strength and rigidity of the base slab 1 and may even cause deformation of the steel mesh 12, affecting the overall stress distribution of the base slab 1. The second concrete layer 11 encloses the steel mesh 12, the reinforcing bars 13, the bottom of the steel formwork 21, the horizontal section of the first L-shaped reinforcement 2311, the horizontal section of the second L-shaped reinforcement 2313, and the reinforcing bars 3. The horizontal sections of the first L-shaped reinforcement 2311 and the second L-shaped reinforcement 2313 are tied together with the steel mesh 12, so that the second concrete layer 11 can wrap the steel mesh 12, the pad reinforcement 13, the steel formwork 21, the horizontal sections of the first L-shaped reinforcement 2311, the horizontal sections of the second L-shaped reinforcement 2313 and the reinforcing bars 3 into a whole, thereby improving the stability and integrity of the overall structure of the composite wall panel.

[0043] Furthermore, such as Figure 8 As shown, the base slab 1 also includes multiple reinforcing ribs 14. Each steel formwork 21 has at least two reinforcing ribs 14 at its bottom, each extending along the length of the steel formwork 21 and bound together with the reinforcing mesh 12. The reinforcing ribs 14 are also embedded in the second concrete layer 11, which improves the strength and rigidity of the base slab 1, enabling the composite wall panel to achieve a support-free effect, further enhancing the shear resistance of the base slab 1 along its length, preventing longitudinal cracks in the base slab 1 under load, and improving the overall structural stability of the base slab 1.

[0044] It should be noted that both the first concrete layer 22 and the second concrete layer 11 are concrete layers, that is, they are formed by pouring concrete.

[0045] Based on the above structure, the manufacturing principle of a prefabricated composite floor slab for prefabricated buildings in this embodiment is as follows:

[0046] like Figure 7As shown, first, the steel mesh 12 is laid out. Two reinforcing bars 14 are tied to the steel mesh 12 at each location where the steel formwork 21 needs to be embedded. Two spacer bars 13 are placed on both sides of the two reinforcing bars 14 and tied to the steel mesh 12. The assembled steel formwork 21 is placed on top of the spacer bars 13. Then, two hanging bars 231 are placed on the steel formwork 21, and the first L-shaped bar 2311 and the second L-shaped bar 2313 of the hanging bars 231 are tied to the steel mesh 12 outside the steel formwork 21 and the steel mesh 12 inside the steel formwork 21, respectively. Then, two pressure bars 3 are tied to the top of the first L-shaped bar 2311 and the second L-shaped bar 2313 of the two hanging bars 231.

[0047] A second concrete layer 11 is poured into the formwork to enclose the reinforcing mesh 12, reinforcing bars 14, pad bars 13, the bottom of the steel formwork 21, the first L-shaped bars 2311, the second L-shaped bars 2313, and the reinforcing bars 3 within the second concrete layer 11. After the second concrete layer 11 solidifies, a first concrete layer 22 is poured into each rectangular structure within the steel formwork 21, ensuring that the top of the first concrete layer 22 is flush with the top of the stiffening ribs 212, thus forming concrete ribs 2. The other steel formwork sections 21 are also filled with a first concrete layer 22 to form multiple concrete ribs 2, such as... Figure 1 As shown.

[0048] Once the second concrete layer 11 has solidified, the composite floor slab is complete and can be lifted into place by a crane.

[0049] Example 2

[0050] Unlike Example 1, as Figure 3As shown, since the base plate 1 is made of poured concrete, and the bottom of the steel formwork 21 needs to be embedded in the top of the base plate 1, the connection between the base plate 1 and the steel formwork 21 is prone to thermal expansion and contraction due to weather conditions, which can lead to cracking and leakage between the base plate 1 and the steel formwork 21. Therefore, the steel formwork 21 in this embodiment also includes two angle steels 213. Both angle steels 213 extend along the length of the long ribs 211 and are located on opposite sides of the two long ribs 211. The vertical sides of the two angle steels 213 are fixedly connected to their corresponding long ribs 211 by multiple self-tapping screws, and the horizontal sides of the two angle steels 213 are flush with the bottom edges of the two long ribs 211. The bottoms of both angle steels 213 are pre-embedded in the top of the base plate 1. This ensures that even if cracks or leaks occur between the base plate 1 and the long rib 211, the angle steels 213 can strengthen the anchoring strength of the steel formwork 21 and improve the connection rigidity between the steel formwork 21 and the base plate 1. Furthermore, the angle steels 213 can prevent water from seeping into the interior of the base plate 1 through the gap between the long rib 211 and the base plate 1 after cracks occur, thus preventing water seepage and further improving the stability of the composite floor slab.

[0051] Example 3

[0052] Unlike Embodiment 1 and Embodiment 2, as Figure 4 As shown, the steel template 21 in this embodiment also includes two horizontally arranged steel plates 214. That is, the two angle steels 213 of the first embodiment are replaced by two steel plates 214. Both steel plates 214 extend along the length of the long ribs 211 and are located at the bottom of the two long ribs 211 respectively. The two steel plates 214 are fixedly connected to the bottom of their respective long ribs 211 by self-tapping screws, and the opposite sides of the two steel plates 214 extend beyond the opposite sides of the two long ribs 211. Both steel plates 214 are embedded in the top of the base plate 1. The arrangement of the two steel plates 214 ensures that even if cracking or leakage occurs between the base plate 1 and the long ribs 211, the steel plates 214 can strengthen the anchoring strength of the steel template 21 and improve the connection rigidity between the steel template 21 and the base plate 1. Furthermore, the steel plate 214 can also prevent water from seeping into the interior of the base plate 1 through the gap between the long rib 211 and the base plate 1 after cracks occur between the base plate 1 and the long rib 211, thereby preventing water seepage and further improving the stability of the composite floor slab.

[0053] Example 4

[0054] Unlike Embodiment 1, Embodiment 2, and Embodiment 3, as Figure 5As shown, the steel formwork 21 includes two long ribs 211 of Z-shaped steel, multiple stiffening ribs 212 of C-shaped steel, and two angle steels 213. The top edge of each long rib 211 extends towards the other long rib 211, the vertical edges of each long rib 211 are vertically aligned, and the bottom edge of each long rib 211 extends away from the other long rib 211. Both long ribs 211 are vertically aligned, extending along the width of the base plate 1, and are positioned opposite each other. The multiple stiffening ribs 212 are horizontally aligned, perpendicular to the two long ribs 211 and located between them. The ends of each stiffening rib 212 are fixedly connected to the opposite sidewalls of the two long ribs 211, and the openings of the multiple stiffening ribs 212 face the length of the base plate 1, forming multiple rectangular structures with the two long ribs 211.

[0055] To prevent interference between the stiffening ribs 212 and the angle steel 213, a groove is cut at each end of the stiffening rib 212. The inner wall of the groove fits against the top inner wall and top wall of the angle steel 213, thus ensuring that the installation of the stiffening ribs 212 and angle steel 213 is not affected. Both angle steels 213 extend along the length of the long ribs 211 and are located between the two long ribs 211. The two angle steels 213 are positioned opposite each other, and their vertical sides are fixed to the inner wall of their corresponding long ribs 211 using self-tapping screws. The horizontal sides of both angle steels 213 are flush with the bottom edges of the two long ribs 211. The bottoms of the two long ribs 211, multiple stiffening ribs 212, and two angle steels 213 are all pre-embedded in the top of the base plate 1. The first concrete layer 22 is poured within multiple rectangular structures. By arranging the long ribs 211 in a Z-shape, even if cracks or leaks occur between the base plate 1 and the long ribs 211, the bottom edge of the long ribs 211 can strengthen the anchoring strength of the steel formwork 21 and improve the connection rigidity between the steel formwork 21 and the base plate 1. Furthermore, the bottom edge of the long ribs 211 can also prevent water from seeping into the interior of the base plate 1 through the gap between the vertical edge of the long ribs 211 and the base plate 1 after cracks occur, thus preventing water seepage and further improving the stability of the composite floor slab.

[0056] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A composite floor slab for prefabricated buildings, characterized in that, It includes a horizontally arranged base plate (1) and a plurality of structurally identical concrete ribs (2) arranged parallel to each other along the length of the base plate (1). Each concrete rib (2) includes a steel formwork (21), a first concrete layer (22) and two sets of hoisting components (23). The steel template (21) extends along the width direction of the base plate (1), and its bottom is embedded in the top of the base plate (1); The two sets of hoisting components (23) have the same structure and are located at both ends of the steel template (21). The two ends of each set of hoisting components (23) are embedded in the base plate (1). The middle part of the hoisting component (23) is the hoisting point area, which protrudes from the top of the steel template (21). The first concrete layer (22) is poured inside the steel formwork (21) to form an integral structure of the steel formwork (21), the base plate (1) and the two sets of hoisting components (23).

2. The prefabricated composite floor slab for prefabricated buildings as described in claim 1, characterized in that: The steel template (21) includes two long ribs (211) that are both C-shaped steel and multiple stiffening ribs (212). Both of the long ribs (211) extend along the width direction of the base plate (1), and the two long ribs (211) are arranged opposite to each other; Multiple stiffening ribs (212) are fixedly connected between two long ribs (211), and the multiple stiffening ribs (212) and the two long ribs (211) form multiple rectangular structures; The bottoms of the two long ribs (211) and the multiple stiffening ribs (212) are all pre-embedded in the top of the base plate (1), and the first concrete layer (22) is poured into the multiple rectangular structures.

3. The prefabricated composite floor slab for prefabricated buildings as described in claim 2, characterized in that: The steel template (21) also includes two angle steels (213); Both angle steels (213) extend along the length of the long rib (211) and are located on opposite sides of the two long ribs (211). The vertical sides of the two angle steels (213) are fixedly connected to their corresponding long ribs (211) by self-tapping screws. The horizontal sides of the two angle steels (213) are flush with the bottom sides of the two long ribs (211). The bottoms of both angle steels (213) are embedded in the top of the base plate (1).

4. The prefabricated composite floor slab for prefabricated buildings as described in claim 2, characterized in that: The steel formwork (21) also includes two horizontally arranged steel plates (214). Both steel plates (214) extend along the length of the long ribs (211) and are located at the bottom of the two long ribs (211) respectively. The two steel plates (214) are fixedly connected to the bottom of their respective long ribs (211) by self-tapping screws, and the opposite sides of the two steel plates (214) extend beyond the opposite sides of the two long ribs (211). Both steel plates (214) are embedded in the top of the base plate (1).

5. The prefabricated composite floor slab for prefabricated buildings as described in claim 1, characterized in that: The steel template (21) includes two long ribs (211) of Z-shaped steel, multiple stiffening ribs (212) of C-shaped steel, and two angle steels (213). Both of the long ribs (211) are arranged vertically, and both extend along the width direction of the base plate (1), and the two long ribs (211) are arranged opposite to each other; Multiple stiffening ribs (212) are arranged laterally, each of which is arranged perpendicularly to the two long ribs (211) and located between the two long ribs (211). The two ends of the multiple stiffening ribs (212) are respectively fixedly connected to the opposite sidewalls of the two long ribs (211). The openings of the multiple stiffening ribs (212) face the length direction of the base plate (1) and form multiple rectangular structures with the two long ribs (211). Both angle steels (213) extend along the length of the long rib (211) and are located between the two long ribs (211). The two angle steels (213) are arranged opposite to each other, and their vertical sides are fixedly connected to the inner wall of their corresponding long ribs (211) by self-tapping screws. The horizontal sides of the two angle steels (213) are flush with the bottom edges of the two long ribs (211). The bottoms of the two long ribs (211), the multiple stiffening ribs (212) and the two angle steels (213) are all pre-embedded in the top of the base plate (1), and the first concrete layer (22) is poured into the multiple rectangular structures.

6. The prefabricated composite floor slab for prefabricated buildings as described in claim 1, characterized in that: The hoisting assembly (23) includes at least two identical hoisting rods (231); At least two of the suspension rods (231) are arranged parallel to each other along the arrangement direction of the plurality of steel templates (21). Both ends of the suspension rods (231) are embedded in the top of the base plate (1) and are located inside and outside the steel template (21) respectively. The middle part of the two suspension rods (231) protrudes from the steel template (21) and is fixedly connected to each other at the protruding position.

7. The prefabricated composite floor slab for prefabricated buildings as described in claim 6, characterized in that: The suspension rod (231) includes a first L-shaped bar (2311), a horizontal bar (2312), and a second L-shaped bar (2313) connected sequentially along the width direction of the bottom plate (1). The first L-shaped rib (2311) is located inside the steel template (21), the horizontal rib (2312) is located above the steel template (21), and the second L-shaped rib (2313) is located outside the steel template (21). The horizontal sections of the first L-shaped reinforcement (2311) and the second L-shaped reinforcement (2313) are both pre-embedded in the top of the base plate (1); The horizontal bars (2312) in the two suspension bars (231) are fixedly connected to each other, and they form the suspension point area.

8. The prefabricated composite floor slab for prefabricated buildings as described in claim 7, characterized in that: At least two reinforcing bars (3) are tied to the top of the two first L-shaped bars (2311) and the top of the two second L-shaped bars (2313), and there is a gap between the two first L-shaped bars (2311) and between the two second L-shaped bars (2313) in the two hanging bars (231).

9. The prefabricated composite floor slab for prefabricated buildings as described in claim 8, characterized in that: The base plate (1) includes a second concrete layer (11), a steel mesh (12), and multiple reinforcing bars (13). Multiple of the aforementioned reinforcing bars (13) extend along the extension direction of the steel template (21), and are all tied to the steel mesh (12) and located at the top of the steel mesh; Each of the steel templates (21) is provided with at least two of the pads (13) below it, and the bottom of each of the steel templates (21) is attached to the corresponding at least two pads (13) to limit the pre-embedded depth of the bottom of the steel template (21); The second concrete layer (11) wraps the steel mesh (12), the pad reinforcement (13), the bottom of the steel formwork (21), the horizontal section of the first L-shaped reinforcement (2311), the horizontal section of the second L-shaped reinforcement (2313), and the pressure reinforcement (3). The horizontal sections of the first L-shaped bar (2311) and the second L-shaped bar (2313) are both tied together with the steel mesh (12).

10. The prefabricated composite floor slab for prefabricated buildings as described in claim 9, characterized in that: The base plate (1) also includes multiple reinforcing ribs (14); Each of the steel templates (21) has at least two reinforcing ribs (14) at its bottom. Each reinforcing rib (14) extends along the length of the steel template (21) and is tied together with the steel mesh (12). The reinforcing bar (14) is also embedded in the second concrete layer (11).

Images