Prefabricated bottom plate for laminated slab, two-stage forming method of prefabricated bottom plate and laminated slab
Through the two-stage molding method of prefabricated bottom plates with laminated plates, the problem of weakening of concrete ribs caused by traditional laminated plate wire pipe arrangement is solved, an efficient and economical support-free design is achieved, and the bending stiffness and load-bearing capacity of laminated plates are improved.
Patent Information
- Application Number
- CN202411433574.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-02-14
AI Technical Summary
When the traditional concrete ribbed overlapping floor slab is arranged, the concrete ribs are easily weakened, causing ribs to break, and production inconvenient, resulting in technical bias and high costs.
A two-stage molding method of prefabricated bottom plates for laminated plates is adopted, including factory prefabrication and on-site molding. The factory prefabrication stage forms the concrete rib part and the bottom plate part to form the line pipe space; the line pipe is arranged in the line pipe space and the support structure is filled to achieve support-free installation.
The bending stiffness and load-bearing capacity of the prefabricated base plate are improved, the support-free design of the laminated plate is realized, the production costs are reduced, and the technical bias and high cost problems of traditional technologies are solved.
Smart Images
Figure CN119434516A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of prefabricated buildings, and in particular relates to a prefabricated base plate for a composite board and a two-stage forming method thereof, and a composite board. Background Art
[0002] Concrete ribbed composite slabs usually use holes in the ribs to allow the mechanical and electrical conduits to be arranged horizontally. However, this method can easily weaken the concrete ribs and cause rib fractures. In addition, the production is inconvenient, so ribbed composite slabs have not been well promoted.
[0003] There are also schemes that use steel bar trusses or steel pipe trusses to connect the bottom plate and the ribs to form a space for the wire pipe to pass through under the ribs, but this scheme is expensive and troublesome to manufacture. Therefore, the present invention comes into being. Summary of the invention
[0004] The object of the present invention is to provide a composite plate which is convenient for arranging wire tubes, can maintain a large bending rigidity of a prefabricated bottom plate and has a low production cost.
[0005] To this end, the present invention first provides a two-stage forming method for a prefabricated base plate for a composite plate, characterized in that it includes the following steps: The first stage is factory prefabrication: prefabricate the bottom plate part and the concrete rib part, wherein the concrete rib part is formed on the bottom plate part, and a wire pipe space is formed in the concrete rib part; Second stage on-site forming: installing the base plate portion at the construction site, arranging the wire pipes in the wire pipe space, and filling the wire pipe space with a supporting structure to achieve support-free installation of the base plate portion.
[0006] Preferably, the supporting structure is a quick-drying concrete structure or a prefabricated concrete block structure.
[0007] Preferably, the wire conduit space is a wire conduit groove or a wire conduit hole opened in the concrete rib portion.
[0008] Preferably, a first auxiliary support is provided at the notch of the wire tube groove.
[0009] Preferably, the first auxiliary support is a steel plate, and the steel plate is connected to the concrete rib parts on both sides of the wire tube space.
[0010] Preferably, a second auxiliary support is formed on the bottom plate portion and on the side of the wire tube space.
[0011] Preferably, the second auxiliary support is a short truss or a short rib.
[0012] Preferably, the length of the second auxiliary support is not less than the length of the wire tube space.
[0013] The present invention also provides a prefabricated base plate for a composite board, characterized in that it is formed by the above-mentioned two-stage forming method.
[0014] The present invention also provides a composite slab, characterized in that it comprises the above-mentioned prefabricated base plate for composite slabs, a cast-in-place floor slab layer is cast on the prefabricated base plate for composite slabs, and the cast-in-place floor slab layer covers the concrete rib part and the supporting structure.
[0015] The technical effects produced by the above technical solution of the present invention come from one or more of the following combinations: Compared with traditional concrete rib composite slabs, which all use prefabricated door openings and wire pipe grooves on concrete ribs for one-piece molding in the factory, this has become a technical shackle and technical prejudice in this industry. This solution uses secondary molding, and implements wire pipe space support after the wire pipe layout is completed to further improve the bearing capacity of the prefabricated base plate, thereby realizing support-free casting, breaking through the limitations of the inherent ideas of existing technologies and opening up a simple but efficient and economical new method.
[0016] After the precast base plate for the composite slab is in place on the construction site, before the composite layer is poured, the precast base plate mainly bears its own weight and construction live load; when the composite layer concrete is poured, it needs to bear the weight of the composite layer concrete. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the precast base plate before concrete pouring is 100kg / m² of its own weight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary molding solution can not only ensure the convenience of pipeline threading of the precast base plate before the composite layer is poured, but also greatly increase the stiffness and bending bearing capacity of the precast base plate of the composite slab by filling the wire pipe space after the wire pipe is installed, so as to realize the support-free design of the composite slab.
[0017] For the precast base plate of a single-span composite slab, the precast base plate is subjected to positive bending moment during the construction stage and the ribs are subjected to pressure. Therefore, the ribs can be made to bear higher pressure by pouring quick-drying concrete. The construction is simple and the overall cost is low, which is a good economical method. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The present invention shows a schematic diagram of the first-stage structure of the prefabricated base plate for the composite slab.
[0019] Figure 2 The present invention shows a schematic diagram of the two-stage wiring arrangement of the prefabricated base plate for the composite slab.
[0020] Figure 3 The present invention shows a schematic diagram of the two-stage structure of the prefabricated base plate for the composite slab.
[0021] Figure 4The schematic diagram of the structure of the first auxiliary support of the prefabricated bottom plate for the composite slab in the present invention is expressed.
[0022] Figure 5 The schematic diagram of the structure of the second auxiliary support of the prefabricated bottom plate for the composite slab in the present invention is expressed.
[0023] Figure 6 The schematic diagram of the structure of the composite plate in the present invention is expressed. DETAILED DESCRIPTION
[0024] The following description is given to enable those skilled in the art to implement and use the invention and incorporate it into a specific application context. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.
[0025] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the practice of the present invention need not be limited to these specific details. In other words, known structures and devices are shown in block diagram form without detailed display to avoid obscuring the present invention.
[0026] The reader is reminded of all documents and literature filed simultaneously with this specification and open to public inspection, and the contents of all such documents and literature are incorporated herein by reference. Unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) can be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features.
[0027] Note that, where used, the symbols left, right, front, back, top, bottom, forward, reverse, clockwise and counterclockwise are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between the various parts of the object. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Note that, in the case of use, further, preferably, further and more preferably are simple beginnings for explaining another embodiment based on the previous embodiment, and the content of further, preferably, further or more preferably followed by the above embodiment is combined with the previous embodiment as a complete composition of another embodiment. Several further, preferably, further or more preferably settings followed by the same embodiment can be arbitrarily combined to form another embodiment.
[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.
[0031] Embodiment 1: See also Figure 1~Figure 5 , this embodiment provides a two-stage forming method of a prefabricated base plate for a composite panel, which includes two main steps, namely, a first-stage factory prefabrication and a second-stage on-site forming.
[0032] In the first-stage factory prefabrication, the bottom plate portion 1 and the concrete rib portion 2 are first prefabricated in the factory, the concrete rib portion 2 is formed on the bottom plate portion 1 , and the wire conduit space 20 is formed in the concrete rib portion 2 .
[0033] The bottom plate part 1 and the concrete rib part 2 can be formed by mold casting, concrete extruder, etc. Preferably, the bottom plate part 1 is a prestressed bottom plate.
[0034] The wire conduit space 20 is defined as the wiring space for the wire conduits 3 of the floor slab, and is generally used for the arrangement of electrical wires and water pipes. Since there is a positional conflict between the wiring position and the concrete rib part 2, this problem is solved by forming the wire conduit space 20 on the concrete rib.
[0035] In this embodiment, the wire conduit space 20 is implemented as a wire conduit groove or a wire conduit hole. This embodiment is described in detail with a wire conduit groove in a more convenient opening form. It should be noted that the number of wire conduit grooves on the same concrete rib part 2 is not limited; similarly, the number of concrete rib parts 2 on the bottom plate part 1 is not limited.
[0036] In the second stage of on-site forming, the base plate part 1 is installed at the construction site, and the wire pipe 3 is arranged in the wire pipe space 20. After the wire pipe 3 is arranged, the support structure 4 is filled in the wire pipe space 20 to greatly increase the base plate rigidity, so that the base plate part 1 can be poured without scaffolding support when the composite layer concrete is poured. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the prefabricated base plate before concrete pouring is 100kg / m² of self-weight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary forming scheme can not only ensure the convenience of pipeline threading of the prefabricated base plate before the composite layer is poured, but also greatly increase the rigidity and bending bearing capacity of the prefabricated base plate of the composite slab by filling the wire pipe space 20 after the wire pipe 3 is installed, so as to realize the support-free design when the composite slab is poured.
[0037] The support structure 4 is used as a rear reinforcement part of the structure in this embodiment, and the support structure 4 is preferably a quick-drying concrete structure or a prefabricated concrete block structure. Alternatively, it is expected that high-strength foaming materials or high-molecular polymer materials can be selected as a substitute for materials science.
[0038] As a preferred implementation of this embodiment, the notch of the wire pipe groove is provided with a first auxiliary support 5. Preferably, the first auxiliary support 5 is a steel plate, which is connected to the concrete rib part 2 on both sides of the wire pipe space 20. The steel plate can be used as a pressure-bearing member to improve the pressure-bearing capacity of the concrete rib part 2; at the same time, the two ends of the steel plate are connected to the concrete rib part 2 on both sides of the wire pipe groove, which can also play a tensile role. Preferably, the steel plate can be implemented as a U-shaped plate.
[0039] Furthermore, a second auxiliary support 6 is formed on the bottom plate portion 1 and on the side of the wire tube space 20. Preferably, the second auxiliary support 6 is a short truss or a short rib. More preferably, the length of the second auxiliary support 6 is not less than the length of the wire tube space 20, but should be less than the length of the concrete rib portion 2 for economic cost considerations.
[0040] The beneficial effects of this embodiment are: Compared with traditional concrete rib composite slabs, which all use prefabricated door openings and wire pipe grooves on concrete ribs for factory-integrated molding, this has become a technical shackle and technical prejudice in the industry. This solution uses secondary molding, and implements support for the wire pipe space 20 after the layout of the wire pipe 3 is completed to further improve the bearing capacity of the prefabricated base plate, thereby realizing support-free casting, breaking through the limitations of the inherent ideas of the existing technology and opening up a simple but efficient and economical new method.
[0041] After the prefabricated base plate for the composite slab is in place on the construction site, before the composite layer is poured, the prefabricated base plate mainly bears its own weight and construction live load; when the composite layer concrete is poured, it needs to bear the weight of the composite layer concrete. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the prefabricated base plate before concrete pouring is 100kg / m² of its own weight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary molding solution can not only ensure the convenience of pipeline threading of the prefabricated base plate before the composite layer is poured, but also greatly increase the rigidity and bending bearing capacity of the prefabricated base plate of the composite slab by filling the wire pipe space 20 after the wire pipe 3 is installed, so as to realize the support-free design when pouring the cast-in-place layer of the composite slab.
[0042] For the precast base plate of a single-span composite slab, the precast base plate is subjected to positive bending moment during the construction stage and the ribs are subjected to pressure. Therefore, the ribs can be made to bear pressure by pouring quick-drying concrete. The construction is simple and the overall cost is low, which is a good economical method.
[0043] Embodiment 2: See also Figure 1~Figure 5 This embodiment provides a prefabricated base plate for a composite plate, and the prefabricated base plate is formed by the two-stage forming method of Example 1.
[0044] Specifically, the bottom plate portion 1 and the concrete rib portion 2 are prefabricated in a factory, the concrete rib portion 2 is formed on the bottom plate portion 1, and the wire pipe space 20 is formed in the concrete rib portion 2. The bottom plate portion 1 and the concrete rib portion 2 can be formed by mold casting, concrete extruder, etc. Preferably, the bottom plate portion 1 is a prestressed bottom plate.
[0045] The wire conduit space 20 is defined as the wiring space for the wire conduits 3 of the floor slab, and is generally used for the arrangement of electrical wires and water pipes. Since there is a positional conflict between the wiring position and the concrete rib part 2, this problem is solved by forming the wire conduit space 20 on the concrete rib.
[0046] In this embodiment, the wire conduit space 20 is implemented as a wire conduit groove or a wire conduit hole. This embodiment is described in detail with a wire conduit groove in a more convenient opening form. It should be noted that the number of wire conduit grooves on the same concrete rib part 2 is not limited; similarly, the number of concrete rib parts 2 on the bottom plate part 1 is not limited.
[0047] In the second stage of on-site forming, the base plate part 1 is installed at the construction site, and the wire pipe 3 is arranged in the wire pipe space 20. After the wire pipe 3 is arranged, the support structure 4 is filled in the wire pipe space 20 to greatly increase the base plate rigidity, so that the base plate part 1 can be poured without scaffolding support when the composite layer concrete is poured. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the prefabricated base plate before concrete pouring is 100kg / m² of self-weight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary forming scheme can not only ensure the convenience of pipeline threading of the prefabricated base plate before the composite layer is poured, but also greatly increase the rigidity and bending bearing capacity of the prefabricated base plate of the composite slab by filling the wire pipe space 20 after the wire pipe 3 is installed, so as to realize the support-free design when the composite slab is poured.
[0048] The support structure 4 is used as a rear reinforcement part of the structure in this embodiment, and the support structure 4 is preferably a quick-drying concrete structure or a prefabricated concrete block structure. Alternatively, it is expected that high-strength foaming materials or high-molecular polymer materials can be selected as a substitute for materials science.
[0049] As a preferred implementation of this embodiment, the notch of the wire pipe groove is provided with a first auxiliary support 5. Preferably, the first auxiliary support 5 is a steel plate, which is connected to the concrete rib part 2 on both sides of the wire pipe space 20. The steel plate can be used as a pressure-bearing member to improve the pressure-bearing capacity of the concrete rib part 2; at the same time, the two ends of the steel plate are connected to the concrete rib part 2 on both sides of the wire pipe groove, which can also play a tensile role. Preferably, the steel plate can be implemented as a U-shaped plate.
[0050] Furthermore, a second auxiliary support 6 is formed on the bottom plate portion 1 and on the side of the wire tube space 20. Preferably, the second auxiliary support 6 is a short truss or a short rib. More preferably, the length of the second auxiliary support 6 is not less than the length of the wire tube space 20, but should be less than the length of the concrete rib portion 2 for economic cost considerations.
[0051] The beneficial effects of this embodiment are: Compared with traditional concrete rib composite slabs, which all use prefabricated door openings and wire pipe grooves on concrete ribs for factory-integrated molding, this has become a technical shackle and technical prejudice in the industry. This solution uses secondary molding, and implements support for the wire pipe space 20 after the layout of the wire pipe 3 is completed to further improve the bearing capacity of the prefabricated base plate, thereby realizing support-free casting, breaking through the limitations of the inherent ideas of the existing technology and opening up a simple but efficient and economical new method.
[0052] After the prefabricated base plate for the composite slab is in place on the construction site, before the composite layer is poured, the prefabricated base plate mainly bears its own weight and construction live load; when the composite layer concrete is poured, it needs to bear the weight of the composite layer concrete. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the prefabricated base plate before concrete pouring is 100kg / m² of its own weight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary molding solution can not only ensure the convenience of pipeline threading of the prefabricated base plate before the composite layer is poured, but also greatly increase the rigidity and bending bearing capacity of the prefabricated base plate of the composite slab by filling the wire pipe space 20 after the wire pipe 3 is installed, so as to realize the support-free design when pouring the cast-in-place layer of the composite slab.
[0053] For the precast base plate of a single-span composite slab, the precast base plate is subjected to positive bending moment during the construction stage and the ribs are subjected to pressure. Therefore, the ribs can be made to bear pressure by pouring quick-drying concrete, which makes the construction simple and the overall cost low.
[0054] Embodiment 3: See also Figure 1 to Figure 6 The present invention further provides a composite slab, including a prefabricated base plate for the composite slab, on which a cast-in-place floor slab layer 7 is cast and formed, and the cast-in-place floor slab layer 7 covers the concrete rib part 2 and the supporting structure 4.
[0055] Specifically, the bottom plate portion 1 and the concrete rib portion 2 are prefabricated in a factory, the concrete rib portion 2 is formed on the bottom plate portion 1, and the wire pipe space 20 is formed in the concrete rib portion 2. The bottom plate portion 1 and the concrete rib portion 2 can be formed by mold casting, concrete extruder, etc. Preferably, the bottom plate portion 1 is a prestressed bottom plate.
[0056] The wire conduit space 20 is defined as the wiring space for the wire conduits 3 of the floor slab, and is generally used for the arrangement of electrical wires and water pipes. Since there is a positional conflict between the wiring position and the concrete rib part 2, this problem is solved by forming the wire conduit space 20 on the concrete rib.
[0057] In this embodiment, the wire conduit space 20 is implemented as a wire conduit groove or a wire conduit hole. This embodiment is described in detail with a wire conduit groove in a more convenient opening form. It should be noted that the number of wire conduit grooves on the same concrete rib part 2 is not limited; similarly, the number of concrete rib parts 2 on the bottom plate part 1 is not limited.
[0058] The bottom plate part 1 is installed at the construction site, and the wire pipe 3 is arranged in the wire pipe space 20. After the wire pipe 3 is arranged, the support structure 4 is filled in the wire pipe space 20 to greatly increase the bottom plate rigidity, so that the bottom plate part 1 can be poured without scaffolding support when the composite layer concrete is poured. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the prefabricated bottom plate before concrete pouring is 100kg / m² of deadweight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary molding solution can not only ensure the convenience of pipeline threading of the prefabricated bottom plate before the composite layer is poured, but also greatly increase the rigidity and bending bearing capacity of the prefabricated bottom plate of the composite slab by filling the wire pipe space 20 after the wire pipe 3 is installed, so as to realize the support-free design when the composite slab is poured into the composite layer.
[0059] The support structure 4 is used as a rear reinforcement part of the structure in this embodiment, and the support structure 4 is preferably a quick-drying concrete structure or a prefabricated concrete block structure. Alternatively, it is expected that high-strength foaming materials or high-molecular polymer materials can be selected as a substitute for materials science.
[0060] As a preferred implementation of this embodiment, the notch of the wire pipe groove is provided with a first auxiliary support 5. Preferably, the first auxiliary support 5 is a steel plate, which is connected to the concrete rib part 2 on both sides of the wire pipe space 20. The steel plate can be used as a pressure-bearing member to improve the pressure-bearing capacity of the concrete rib part 2; at the same time, the two ends of the steel plate are connected to the concrete rib part 2 on both sides of the wire pipe groove, which can also play a tensile role. Preferably, the steel plate can be implemented as a U-shaped plate.
[0061] Furthermore, a second auxiliary support 6 is formed on the bottom plate portion 1 and on the side of the wire tube space 20. Preferably, the second auxiliary support 6 is a short truss or a short rib. More preferably, the length of the second auxiliary support 6 is not less than the length of the wire tube space 20, but should be less than the length of the concrete rib portion 2 for economic cost considerations.
[0062] Beneficial effects of this embodiment: Compared with traditional concrete rib composite slabs, which all use prefabricated door openings and wire pipe grooves on concrete ribs for factory-integrated molding, this has become a technical shackle and technical prejudice in the industry. This solution uses secondary molding, and implements support for the wire pipe space 20 after the layout of the wire pipe 3 is completed to further improve the bearing capacity of the prefabricated base plate, thereby realizing support-free casting, breaking through the limitations of the inherent ideas of the existing technology and opening up a simple but efficient and economical new method.
[0063] After the prefabricated base plate for the composite slab is in place on the construction site, before the composite layer is poured, the prefabricated base plate mainly bears its own weight and construction live load; when the composite layer concrete is poured, it needs to bear the weight of the composite layer concrete. For a conventional prestressed composite slab with a base plate thickness of 40mm and a cast-in-place layer of 90mm, the weight of the prefabricated base plate before concrete pouring is 100kg / m² of its own weight and 150kg / m² of construction live load. After pouring, the weight of cast-in-place concrete needs to be increased by 225kg / m², and the load is almost doubled. Therefore, the secondary molding solution can not only ensure the convenience of pipeline threading of the prefabricated base plate before the composite layer is poured, but also greatly increase the rigidity and bending bearing capacity of the prefabricated base plate of the composite slab by filling the wire pipe space 20 after the wire pipe 3 is installed, so as to realize the support-free design when pouring the cast-in-place layer of the composite slab.
[0064] For the precast base plate of a single-span composite slab, the precast base plate is subjected to positive bending moment during the construction stage and the ribs are subjected to pressure. Therefore, the ribs can be made to bear pressure by pouring quick-drying concrete, which makes the construction simple and the overall cost low. Furthermore, the present invention is described in detail above in conjunction with the embodiments of the accompanying drawings, and a person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the present invention shall be protected by the scope defined by the attached claims.
Claims
1. A two-stage forming method of a prefabricated base plate for a composite plate, characterized in that: The following steps are involved: The first stage is factory prefabrication: prefabricate the bottom plate part and the concrete rib part, wherein the concrete rib part is formed on the bottom plate part, and a wire pipe space is formed in the concrete rib part; Second stage on-site forming: installing the base plate portion at the construction site, arranging the wire pipes in the wire pipe space, and filling the wire pipe space with a supporting structure to achieve support-free installation of the base plate portion.
2. The two-stage forming method according to claim 1, characterized in that: The supporting structure is a quick-drying concrete structure or a prefabricated concrete block structure.
3. The two-stage forming method according to claim 1, characterized in that: The wire conduit space is a wire conduit groove or a wire conduit hole opened in the concrete rib part.
4. The two-stage forming method according to claim 3, characterized in that: A first auxiliary support is provided at the notch of the wire tube groove.
5. The two-stage forming method according to claim 4, characterized in that: The first auxiliary support is a steel plate, and the steel plate is connected to the concrete rib parts on both sides of the wire pipe space.
6. The two-stage forming method according to claim 3, characterized in that: A second auxiliary support is formed on the bottom plate portion and on the side of the wire tube space.
7. The two-stage forming method according to claim 6, characterized in that: The second auxiliary support is a short truss or a short rib.
8. The two-stage forming method according to claim 7, characterized in that: The length of the second auxiliary support is not less than the length of the wire tube space.
9. A prefabricated base plate for a composite slab, characterized in that: The invention is formed by the two-stage molding method according to any one of claims 1 to 8.
10. A composite plate, characterized in that: It comprises the prefabricated bottom plate for composite slabs as claimed in claim 9, wherein a cast-in-place floor slab layer is cast on the prefabricated bottom plate for composite slabs, and the cast-in-place floor slab layer covers the concrete rib part and the supporting structure.