Prestressed composite floor slab

Abstract

This application provides a prestressed composite floor slab, comprising a precast concrete layer, a cast-in-place concrete layer, multiple prestressed steel wires, and multiple first composite reinforcement bars. The prestressed steel wires are arranged alternately and embedded in the precast concrete layer. The first composite reinforcement bars are also arranged alternately, each including a first truss upper chord and a first curved structure. The top ends of the first truss upper chord and the first curved structure are connected, and the lower parts of each first curved structure are embedded in the precast concrete layer. The upper parts of each first curved structure are embedded in the cast-in-place concrete layer, and the first truss upper chord is also embedded in the cast-in-place concrete layer. The cast-in-place concrete layer and the precast concrete layer are connected. This application solves the problem that the composite reinforcement bars in existing prestressed composite floor slabs are not fully utilized, resulting in wasted material on the upper part of the composite reinforcement bars.

Description

[0001] This application claims priority to Chinese Patent Application No. 202411209198.4, filed on August 30, 2024, entitled “Prestressed Composite Floor Slab”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of building construction, and in particular to a prestressed composite floor slab. Background Technology

[0003] Prestressed composite floor slabs are a type of floor slab that combines precast concrete floor slabs and cast-in-place concrete floor slabs. By applying prestress to the reinforcing steel bars, compressive stress is generated in the concrete before it bears a load, thereby improving the load-bearing capacity and crack resistance of the prestressed composite floor slab.

[0004] Composite reinforcement bars are incorporated into precast concrete floor slabs. The lower part of these bars is embedded within the slab to provide rigidity and prevent cracking during demolding and hoisting. The upper part of the composite reinforcement bars does not bear any load during the subsequent casting of the concrete slab, resulting in its wasted capacity. Therefore, the composite reinforcement bars in existing prestressed composite floor slabs are not fully utilized, leading to a waste of material in the upper portion of the reinforcement bars. Utility Model Content

[0005] The purpose of this application is to provide a prestressed composite floor slab with improved utilization of composite reinforcement materials, comprising a precast concrete layer, a cast-in-place concrete layer, multiple prestressed steel wires, and multiple first composite reinforcements. The prestressed steel wires are arranged alternately and embedded in the precast concrete layer. Each first composite reinforcement is arranged alternately and includes a first truss upper chord and a first curved structure. The top ends of the first truss upper chord and the first curved structure are connected, and the lower part of each first curved structure is embedded in the precast concrete layer. The upper part of each first curved structure is embedded in the cast-in-place concrete layer, and the first truss upper chord is embedded in the cast-in-place concrete layer. The cast-in-place concrete layer and the precast concrete layer are connected.

[0006] Optionally, the first bending structure includes a plurality of first bending units, the top ends of each first bending unit are connected in sequence, the top chord of the first truss is connected to the top ends of each first bending unit, the upper part of each first bending unit is embedded in the cast-in-place concrete layer, and the lower part of each first bending unit is embedded in the precast concrete layer.

[0007] Optionally, the first curved structure is a curved rod, and the plane passing through the central axis of the first curved structure on the first composite reinforcement and the central axis of the upper chord of the first truss is perpendicular to the precast concrete layer.

[0008] Optionally, the prestressed composite floor slab further includes structural reinforcement bars, each of the first composite reinforcement bars being arranged parallel to and aligned with each other, the structural reinforcement bars being inserted through the bottom of the first bending unit at the same position of each of the first composite reinforcement bars, and the structural reinforcement bars being connected to the first bending unit at the same position of each of the first composite reinforcement bars.

[0009] Optionally, the prestressed composite floor slab further includes a plurality of second composite reinforcement bars, which are spaced apart from each other. The arrangement direction of the first composite reinforcement bars is different from that of the second composite reinforcement bars. The second composite reinforcement bars are connected to the first composite reinforcement bars. The upper part of each second composite reinforcement bar is embedded in the cast-in-place concrete layer, and the lower part of each second composite reinforcement bar is embedded in the precast concrete layer.

[0010] Optionally, the arrangement direction of the first composite reinforcement is perpendicular to the arrangement direction of the second composite reinforcement, and each of the first composite reinforcements is parallel to each other and aligned.

[0011] Optionally, each of the second composite reinforcements includes a second truss upper chord and a second curved structure, the top of the second truss upper chord and the top of the second curved structure are connected, the upper part of the second curved structure is embedded in the cast-in-place concrete layer, the lower part of the second curved structure is embedded in the precast concrete layer, the second truss upper chord is embedded in the cast-in-place concrete layer, and the second truss upper chord is connected to the first composite reinforcement.

[0012] Optionally, the second bending structure includes a plurality of second bending units, the top ends of each second bending unit are connected in sequence, the upper chord of the second truss is connected to the top ends of each second bending unit, the upper part of each second bending unit is embedded in the cast-in-place concrete layer, and the lower part of each second bending unit is embedded in the precast concrete layer.

[0013] Optionally, the second curved structure is a curved rod, and the plane passing through the central axis of the second curved structure on the second composite reinforcement and the central axis of the upper chord of the second truss is perpendicular to the precast concrete layer.

[0014] Optionally, each of the first composite reinforcement bars is arranged parallel to and aligned with each other, and the upper chord of the second truss passes through the top of the first bending unit at the same position of each of the first composite reinforcement bars, and the upper chord of the second truss is connected to the top of the first bending unit at the same position of each of the first composite reinforcement bars.

[0015] The beneficial effects of this application are as follows: It involves setting up a precast concrete layer, a cast-in-place concrete layer, multiple prestressed steel wires, and multiple first composite reinforcement bars. The prestressed steel wires are arranged alternately and embedded in the precast concrete layer. The first composite reinforcement bars are also arranged alternately, each including a first truss upper chord and a first curved structure. The top ends of the first truss upper chord and the first curved structure are connected, and the lower parts of each first curved structure are embedded in the precast concrete layer. The upper parts of each first curved structure are embedded in the cast-in-place concrete layer, and the first truss upper chord is also embedded in the cast-in-place concrete layer. The cast-in-place concrete layer and the precast concrete layer are connected.

[0016] Since the lower part of each first curved structure is embedded in the precast concrete layer, the upper part of each first curved structure is embedded in the cast-in-place concrete layer, and the upper chord of each first truss is embedded in the cast-in-place concrete layer, all parts of the upper chord of the first truss and the first curved structure can bear the load in the prestressed composite floor slab. This allows the upper chord of the first truss to be used as the upper reinforcement of the cast-in-place concrete layer. Both the upper chord of the first truss and the first curved structure can be utilized, which improves the material utilization rate of the first composite reinforcement and avoids the idle waste of the upper chord of the first truss.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the following describes the application in detail with reference to the preferred embodiments and accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a front view, a partial sectional view, and a magnified partial sectional view of a prestressed composite floor slab in one embodiment of this application;

[0019] Figure 2 This is a perspective view of a prestressed composite floor slab in one embodiment of this application (the cast-in-place concrete layer is omitted, and each first composite reinforcement bar is marked in purple and each second composite reinforcement bar is marked in red).

[0020] Figure 3 This is a top view of a prestressed composite floor slab in one embodiment of this application (the cast-in-place concrete layer and the second composite reinforcement are omitted).

[0021] Figure 4 This is a front view and a partial enlarged view of the first overlapping reinforcement in one embodiment of this application;

[0022] Figure 5 This is a perspective view of a prestressed composite floor slab in one embodiment of this application (the cast-in-place concrete layer and the precast concrete layer are omitted, each first composite reinforcement is marked in purple, each second composite reinforcement is marked in red, and each structural reinforcement is marked in green).

[0023] Figure 6 This is a front view and a partial enlarged view of the second composite reinforcement in one embodiment of this application.

[0024] In the attached figures, the following labels are used:

[0025] 1. Precast concrete layer

[0026] 2. Cast-in-place concrete layer

[0027] 3. Prestressed steel wire

[0028] 4 First layer of composite reinforcement

[0029] 40 First truss upper chord

[0030] 41 First bending structure

[0031] 410 First Bending Unit

[0032] 4100 First Truss Web Member

[0033] 4101 Second Truss Web Member

[0034] 5. Reinforcing steel bars

[0035] 6 Second composite reinforcement

[0036] 60 Second truss upper chord

[0037] 61 Second Bending Structure

[0038] 610 Second Bending Unit

[0039] 6100 Third Truss Web Member

[0040] 6101 Fourth Truss Web Member Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present application will now be described in detail with reference to the accompanying drawings and embodiments. To enable those skilled in the art to better understand the solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0044] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] For ease of explanation, a rectangular coordinate system O-XYZ is used in some of the attached drawings. The X-axis of the coordinate system is parallel to the length direction of the first composite reinforcement 4, the Y-axis is parallel to the length direction of the second composite reinforcement 6, and the Z-axis is parallel to the thickness direction of the precast concrete layer 1 and the cast-in-place concrete layer 2. The positive directions of the X-axis, Y-axis, and Z-axis remain the same in all the attached drawings with coordinate systems.

[0046] Please also refer to Figures 1 to 3 This embodiment provides a prestressed composite floor slab, including a precast concrete layer 1, a cast-in-place concrete layer 2, multiple prestressed steel wires 3, and multiple first composite reinforcement bars 4. The prestressed steel wires 3 are arranged alternately and embedded in the precast concrete layer 1. The first composite reinforcement bars 4 are also arranged alternately, each including a first truss upper chord 40 and a first bending structure 41. The top ends of the first truss upper chord 40 and the first bending structure 41 are connected, and the lower part of each first bending structure 41 is embedded in the precast concrete layer 1. The upper part of each first bending structure 41 is embedded in the cast-in-place concrete layer 2, and the first truss upper chord 40 is embedded in the cast-in-place concrete layer 2. The cast-in-place concrete layer 2 and the precast concrete layer 1 are connected.

[0047] like Figure 1As shown, since the lower part of each first curved structure 41 is embedded in the precast concrete layer 1, and the upper part of each first curved structure 41 is embedded in the cast-in-place concrete layer 2, and the upper chord of each first truss 40 is embedded in the cast-in-place concrete layer 2, both the upper chord of the first truss 40 and the first curved structure 41 can bear the load in the prestressed composite floor slab. This allows the upper chord of the first truss 40 to be used as the upper reinforcement of the cast-in-place concrete layer 2. All parts of the upper chord of the first truss 40 and the first curved structure 41 can be utilized, improving the material utilization rate of the first composite reinforcement 4 and avoiding the idle waste of the upper chord of the first truss 40. At the same time, using the first composite reinforcement 4 with the first curved structure 41 can also prevent the prestressed composite floor slab from arching.

[0048] Please also refer to Figure 1 and Figure 2 The precast concrete layer 1 can be precast on-site, and the lower part of each prestressed steel wire 3 and each first composite reinforcement 4 can be covered by the concrete of the precast concrete layer 1. After the precast concrete layer 1 is cast, it can be hoisted onto the building together with the first composite reinforcement 4 and the second composite reinforcement 6 using a crane.

[0049] Please also refer to Figure 1 and Figure 2 After the precast concrete layer 1 is hoisted into place, the layer formed by pouring concrete on the precast concrete layer 1 is the cast-in-place concrete layer 2. The length directions of each of the first composite reinforcement bars 4 can be parallel to each other. Each prestressed steel wire 3 can be parallel to each other and parallel to the X-axis. The top ends of the first truss upper chord 40 and the first bending structure 41 can be connected by binding or welding with wire. The first composite reinforcement bar 4 can be composed of the first truss upper chord 40 and the first bending structure 41.

[0050] Please also refer to Figure 1 and Figure 4 Optionally, the first bending structure 41 includes multiple first bending units 410, with the tops of each first bending unit 410 connected sequentially. The upper chord of the first truss 40 is connected to the tops of each first bending unit 410. The upper part of each first bending unit 410 is embedded in the cast-in-place concrete layer 2, and the lower part of each first bending unit 410 is embedded in the precast concrete layer 1. Each first bending unit 410 can be connected by welding or integral molding. The first bending structure 41 can be composed of multiple first bending units 410. The shape and size of each first bending unit 410 can be identical. The first bending unit 410 can be V-shaped. The upper chord of the first truss 40 and the tops of each first bending unit 410 can be connected by wire binding or welding.

[0051] Please also refer to Figure 1 and Figure 4Each first bending unit 410 can be formed by a first truss web member 4100 and a second truss web member 4101. The bottom ends of the first truss web member 4100 and the bottom ends of the second truss web member 4101 of the same first bending unit 410 can be connected by welding or integral molding. The top ends of the first truss web member 4100 and the top ends of the second truss web member 4101 of adjacent first bending units 410 can be connected by welding or integral molding.

[0052] Please also refer to Figure 1 and Figure 4 The top ends of the first truss upper chord 40 and each of the first truss web members 4100 and the top ends of each of the second truss web members 4101 are connected by welding or wire binding. The upper parts of each of the first truss web members 4100 and each of the second truss web members 4101 can be embedded in the cast-in-place concrete layer 2, and the lower parts of each of the first truss web members 4100 and each of the second truss web members 4101 can be embedded in the precast concrete layer 1.

[0053] Please also refer to Figure 1 and Figure 4 Optionally, the first curved structure 41 is a curved rod, and the plane passing through the central axis of the first curved structure 41 on the first composite reinforcement 4 and the central axis of the upper chord of the first truss 40 is perpendicular to the precast concrete layer 1. The vertical plane passing through the central axis of the first curved structure 41 on the first composite reinforcement 4 and the vertical plane passing through the central axis of the upper chord of the first truss 40 can be coplanar and perpendicular to the precast concrete layer 1.

[0054] With this configuration, when multiple first composite reinforcement bars 4 are arranged, adjacent first composite reinforcement bars 4 can be arranged more densely without interfering with each other, thereby allowing for more rows of first composite reinforcement bars 4 to increase the stiffness of the precast concrete layer 1 and the cast-in-place concrete layer 2. For each first composite reinforcement bar 4, the vertical plane passing through the central axis of the first curved structure 41 on the first composite reinforcement bar 4 and the central axis of the upper chord 40 of the first truss can be parallel to the XOZ plane. The first curved structure 41 can be in the form of a wavy rod.

[0055] Please also refer to Figure 1 , Figure 4 and Figure 5Optionally, the prestressed composite floor slab also includes structural reinforcement bars 5. Each of the first composite reinforcement bars 4 is arranged parallel and aligned with each other. The structural reinforcement bars 5 pass through the bottom of the first bending unit 410 at the same position of each of the first composite reinforcement bars 4, and are connected to the first bending unit 410 at the same position of each of the first composite reinforcement bars 4. The structural reinforcement bars 5 passing through the bottom of the first bending unit 410 at the same position of each of the first composite reinforcement bars 4 allows for positioning of the structural reinforcement bars 5 using the first bending unit 410 at the same position of each of the first composite reinforcement bars 4, facilitating the connection between the structural reinforcement bars 5 and the first bending unit 410. The structural reinforcement bars 5 can be embedded in the precast concrete layer 1.

[0056] Please also refer to Figure 4 and Figure 5 For example, when the first composite reinforcement bars 4 are aligned and arranged in parallel to each other, the rightmost structural reinforcement bar 5 can be inserted into the bottom of the second first bending unit 410 starting from the right side of each first bending structure 41 (only the first truss web member 4100 is shown in the first first bending unit 410 starting from the right side of each first bending structure 41).

[0057] Please also refer to Figure 1 and Figure 2 Optionally, the prestressed composite floor slab also includes multiple second composite reinforcement bars 6, which are spaced apart from each other. The arrangement direction of the first composite reinforcement bars 4 is different from that of the second composite reinforcement bars 6. The second composite reinforcement bars 6 are connected to the first composite reinforcement bars 4. The upper part of each second composite reinforcement bar 6 is embedded in the cast-in-place concrete layer 2, and the lower part of each second composite reinforcement bar 6 is embedded in the precast concrete layer 1. The different arrangement directions of the first composite reinforcement bars 4 and the second composite reinforcement bars 6 can prevent the prestressed composite floor slab from arching in different directions (e.g., in the direction parallel to the X-axis and the Y-axis). The length directions of each second composite reinforcement bar 6 can be parallel to each other.

[0058] like Figure 2 As shown, the arrangement direction of the first composite reinforcement 4 can be parallel to the Y-axis, and the arrangement direction of the second composite reinforcement 6 can be parallel to the X-axis. The second composite reinforcement 6 and the first composite reinforcement 4 can be connected by binding with wire or welding.

[0059] Please also refer to Figure 4 and Figure 5Optionally, the arrangement direction of the first overlapping reinforcement 4 and the arrangement direction of the second overlapping reinforcement 6 are perpendicular to each other, and the first overlapping reinforcement 4 are arranged parallel to each other and aligned. This arrangement facilitates the passage of each row of second overlapping reinforcement 6 through the first bending unit 410 at the same position of each first overlapping reinforcement 4. Because when the first overlapping reinforcement 4 are parallel to each other and aligned, the first bending unit 410 at the same position of each first overlapping reinforcement 4 is also aligned. At this time, the arrangement direction of the first overlapping reinforcement 4 is perpendicular to the arrangement direction of the second overlapping reinforcement 6, so the second overlapping reinforcement 6 can just pass through the first bending unit 410 at the same position of each first overlapping reinforcement 4.

[0060] Please also refer to Figure 1 and Figure 6 Optionally, each second composite reinforcement 6 includes a second truss upper chord 60 and a second curved structure 61. The top ends of the second truss upper chord 60 and the second curved structure 61 are connected. The upper part of the second curved structure 61 is embedded in the cast-in-place concrete layer 2, and the lower part of the second curved structure 61 is embedded in the precast concrete layer 1. The second truss upper chord 60 is embedded in the cast-in-place concrete layer 2, and the second truss upper chord 60 is connected to the first composite reinforcement 4. The second composite reinforcement 6 can be composed of the second truss upper chord 60 and the second curved structure 61.

[0061] Please also refer to Figure 1 and Figure 6 Since the lower part of each second curved structure 61 is embedded in the precast concrete layer 1, the upper part of each second curved structure 61 is embedded in the cast-in-place concrete layer 2, and the upper chord of each second truss 60 is embedded in the cast-in-place concrete layer 2, both the upper chord of the second truss 60 and the second curved structure 61 can bear the load in the prestressed composite floor slab, allowing the upper chord of the second truss 60 to also be used as the upper reinforcement of the cast-in-place concrete layer 2. All parts of the upper chord of the second truss 60 and the second curved structure 61 can be utilized, improving the material utilization rate of the second composite reinforcement 6 and avoiding the idle waste of the upper chord of the second truss 60.

[0062] Please also refer to Figure 1 , Figure 4 and Figure 6The top ends of the second truss upper chord 60 and the second curved structure 61 can be connected by binding or welding with wire. The second truss upper chord 60 and the first composite reinforcement 4 can be connected by binding or welding with wire. The upper part of the first curved structure 41, the upper part of the second curved structure 61, the first truss upper chord 40 and the second truss upper chord 60 can be embedded in the cast-in-place concrete layer 2, and the lower part of the first curved structure 41 and the lower part of the second curved structure 61 can be embedded in the precast concrete layer 1. This allows the first composite reinforcement 4 and the second composite reinforcement 6 to be embedded in the precast concrete layer 1 and the cast-in-place concrete layer 2, thereby using concrete to prevent the first composite reinforcement 4 and the second composite reinforcement 6 from rusting. The prestressed steel wire 3 and each of the first composite reinforcement 4 are arranged alternately. The prestressed steel wire 3 and each of the second composite reinforcement 6 are arranged alternately. The material of the first composite reinforcement 4 and the second composite reinforcement 6 can be steel.

[0063] Please also refer to Figure 1 , Figure 4 and Figure 6 Optionally, the second bending structure 61 includes a plurality of second bending units 610, the top ends of each second bending unit 610 are connected in sequence, the upper chord of the second truss 60 is connected to the top ends of each second bending unit 610, the upper part of each second bending unit 610 is embedded in the cast-in-place concrete layer 2, and the lower part of each second bending unit 610 is embedded in the precast concrete layer 1.

[0064] Please also refer to Figure 1 , Figure 4 and Figure 6 The second bending structure 61 can be composed of multiple second bending units 610. Each second bending unit 610 can be connected by welding or integral molding. The shape and size of each second bending unit 610 can be identical. The second bending unit 610 can be V-shaped. The shape and size of the second bending unit 610 can be the same as those of the first bending unit 410. The top of the second truss upper chord 60 and the tops of each second bending unit 610 can be connected by wire binding or welding.

[0065] Please also refer to Figure 1 and Figure 6 Each second bending unit 610 can be formed by a third truss web member 6100 and a fourth truss web member 6101. The bottom ends of the third truss web member 6100 and the bottom ends of the fourth truss web member 6101 of the same second bending unit 610 can be connected by welding or integral molding. The top ends of the third truss web member 6100 and the top ends of the fourth truss web member 6101 of adjacent second bending units 610 can be connected by welding or integral molding.

[0066] Please also refer to Figure 1 and Figure 6 The top ends of the second truss upper chord 60, the web members 6100 of each third truss, and the web members 6101 of each fourth truss are connected by welding or wire binding. The upper parts of each third truss web member 6100 and the upper parts of each fourth truss web member 6101 are embedded in the cast-in-place concrete layer 2, and the lower parts of each third truss web member 6100 and the lower parts of each third truss web member 6100 are embedded in the precast concrete layer 1.

[0067] Please also refer to Figure 1 and Figure 6 Optionally, the second curved structure 61 is a curved rod, and the plane passing through the central axis of the second curved structure 61 on the second composite reinforcement 6 and the central axis of the upper chord of the second truss 60 is perpendicular to the precast concrete layer 1. The vertical plane passing through the central axis of the second curved structure 61 on the second composite reinforcement 6 and the vertical plane passing through the central axis of the upper chord of the second truss 60 can be coplanar and perpendicular to the precast concrete layer 1.

[0068] With this configuration, when multiple second composite reinforcement bars 6 are arranged, adjacent second composite reinforcement bars 6 can be arranged more densely without interfering with each other, thereby allowing for more rows of second composite reinforcement bars 6 to increase the stiffness of the precast concrete layer 1 and the cast-in-place concrete layer 2. For each second composite reinforcement bar 6, the vertical plane passing through the central axis of the second curved structure 61 on the second composite reinforcement bar 6 and the central axis of the upper chord 60 of the second truss can be parallel to the YOZ plane. The second curved structure 61 can be in the form of a wavy rod.

[0069] Please also refer to Figure 4 , Figure 5 and Figure 6 Optionally, the first composite reinforcement bars 4 are arranged parallel and aligned with each other, and the second truss upper chord 60 passes through the top of the first bending unit 410 at the same position of each of the first composite reinforcement bars 4. The second truss upper chord 60 and the top of the first bending unit 410 at the same position of each of the first composite reinforcement bars 4 are connected. With this arrangement, the first bending unit 410 can be used to position the second truss upper chord 60, which facilitates the connection between the second truss upper chord 60 and the first bending unit 410.

[0070] Please also refer to Figure 4 , Figure 5 and Figure 6Since the tops of adjacent first bending units 410 can be connected to form a bend, the second truss upper chord 60 can be positioned through this bend. The tops of the second truss upper chord 60 and the first bending units 410 at the same position as each of the first composite reinforcements 4 can be connected by wire binding or welding. When the first composite reinforcements 4 are aligned and arranged parallel to each other, the rightmost second truss upper chord 60 can be inserted below the connection (i.e., the bend) of each second first bending unit 410 and the corresponding third first bending unit 410 starting from the right of each first bending structure 41 (only the first truss web members 4100 are shown in the first bending unit 410 starting from the right of each first bending structure 41).

[0071] The foregoing has provided a detailed description of the prestressed composite floor slabs provided in the embodiments of this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application. All equivalent modifications or changes made in accordance with the spirit and technical concept of this application should still be covered by the claims of this application.

Claims

1. A prestressed composite floor slab, characterized in that, include: Precast concrete layer; Multiple prestressed steel wires are arranged alternately with each other and each prestressed steel wire is embedded in the precast concrete layer. Multiple first composite reinforcement bars are arranged alternately with each other. Each first composite reinforcement bar includes a first truss upper chord and a first bending structure. The top ends of the first truss upper chord and the first bending structure are connected. The lower part of each first bending structure is embedded in the precast concrete layer. as well as The concrete cast-in-place layer, the upper part of each of the first curved structures is embedded in the concrete cast-in-place layer, the upper chord of each of the first trusses is embedded in the concrete cast-in-place layer, and the concrete cast-in-place layer and the concrete precast layer are connected.

2. The prestressed composite floor slab according to claim 1, characterized in that, The first bending structure includes multiple first bending units, the top ends of each first bending unit are connected in sequence, the top chord of the first truss is connected to the top ends of each first bending unit, the upper part of each first bending unit is embedded in the cast-in-place concrete layer, and the lower part of each first bending unit is embedded in the precast concrete layer.

3. The prestressed composite floor slab according to claim 2, characterized in that, The first curved structure is a curved rod, and the plane passing through the central axis of the first curved structure on the first composite reinforcement and the central axis of the upper chord of the first truss is perpendicular to the precast concrete layer.

4. The prestressed composite floor slab according to claim 2, characterized in that, It also includes structural reinforcement bars, each of the first composite reinforcement bars being arranged parallel to and aligned with each other, the structural reinforcement bars being inserted through the bottom of the first bending unit at the same position of each of the first composite reinforcement bars, and the structural reinforcement bars being connected to the first bending unit at the same position of each of the first composite reinforcement bars.

5. The prestressed composite floor slab according to claim 2, characterized in that, It also includes multiple second composite reinforcement bars, which are spaced apart from each other. The arrangement direction of the first composite reinforcement bars is different from that of the second composite reinforcement bars. The second composite reinforcement bars are connected to the first composite reinforcement bars. The upper part of each second composite reinforcement bar is embedded in the cast-in-place concrete layer, and the lower part of each second composite reinforcement bar is embedded in the precast concrete layer.

6. The prestressed composite floor slab according to claim 5, characterized in that, The arrangement direction of the first composite reinforcement is perpendicular to the arrangement direction of the second composite reinforcement, and each of the first composite reinforcements is parallel to each other and aligned.

7. The prestressed composite floor slab according to claim 5, characterized in that, Each of the second composite reinforcements includes a second truss upper chord and a second curved structure. The top ends of the second truss upper chord and the second curved structure are connected. The upper part of the second curved structure is embedded in the cast-in-place concrete layer, and the lower part of the second curved structure is embedded in the precast concrete layer. The second truss upper chord is embedded in the cast-in-place concrete layer, and the second truss upper chord is connected to the first composite reinforcement.

8. The prestressed composite floor slab according to claim 7, characterized in that, The second bending structure includes multiple second bending units, the top ends of each second bending unit are connected in sequence, the upper chord of the second truss is connected to the top ends of each second bending unit, the upper part of each second bending unit is embedded in the cast-in-place concrete layer, and the lower part of each second bending unit is embedded in the precast concrete layer.

9. The prestressed composite floor slab according to claim 7, characterized in that, The second curved structure is in the shape of a curved rod, and the plane passing through the central axis of the second curved structure on the second composite reinforcement and the central axis of the upper chord of the second truss is perpendicular to the precast concrete layer.

10. The prestressed composite floor slab according to claim 7, characterized in that, Each of the first composite reinforcement bars is arranged parallel to and aligned with each other. The upper chord of the second truss passes through the top of the first bending unit at the same position of each of the first composite reinforcement bars. The upper chord of the second truss is connected to the top of the first bending unit at the same position of each of the first composite reinforcement bars.

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