Ultrathin prestressed laminated slab

Abstract

The utility model relates to the technical field of prefabricated parts, in particular to an ultrathin prestressed laminated slab. Comprising a bottom plate, a plurality of first trusses, a plurality of first truss pipes, a plurality of prestressed reinforcements, a plurality of transverse horizontal additional reinforcements and a plurality of transverse horizontal distribution reinforcements, the prestressed reinforcements are all embedded in the bottom plate and are uniformly distributed in the bottom plate, and the transverse horizontal distribution reinforcements are all embedded in the bottom plate and are uniformly distributed in the bottom plate; the first trusses are arranged in the bottom plate, each first truss pipe is fixedly connected with the corresponding first truss and located above the bottom plate, and by means of the mode, the stress requirement of the plate in the transportation and installation process can be met, longitudinal cracks are prevented, the rework and maintenance cost is reduced, and the manufacturing cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of precast component technology, and in particular to an ultra-thin prestressed composite slab. Background Technology

[0002] Composite floor slabs consist of precast slabs and cast-in-place sections. Precast slabs are divided into two main categories: prestressed and non-prestressed. Non-prestressed precast slabs, due to their large thickness and steel consumption, are typically subjected to unidirectional stress and cannot meet the requirements of bidirectional stress in floor slabs. Furthermore, their high cost has led to their limited application in engineering projects. Large-span precast composite slabs, as a new type of prefabricated component, offer significant advantages in improving construction efficiency and ensuring building quality. With the continuous development of building technology and the increasing demand for large-span spaces, the application of large-span composite slab components is becoming more widespread, leading to increasingly higher requirements for their load-bearing performance and assembly technology.

[0003] Existing large-span precast composite slabs are thin, lightweight, and wide. However, they are prone to longitudinal cracks during transportation and installation, requiring rework and repair, which leads to high costs. Utility Model Content

[0004] The purpose of this utility model is to provide an ultra-thin prestressed composite slab, which solves the problems of existing large-span precast composite slabs having small thickness, light weight, and large width, and being prone to longitudinal cracks during transportation and installation, requiring rework and repair, resulting in high costs.

[0005] To achieve the above objectives, this utility model employs an ultra-thin prestressed composite slab, comprising a base plate, multiple first trusses, multiple first truss tubes, multiple prestressed steel bars, multiple transverse horizontal additional bars, and multiple transverse horizontal distribution bars. The multiple prestressed steel bars are all embedded within the base plate and evenly distributed within it. The multiple transverse horizontal distribution bars are also embedded within the base plate and evenly distributed within it. The multiple first trusses are all disposed within the base plate, and each first truss tube is fixedly connected to its corresponding first truss and is located above the base plate.

[0006] Each of the first truss tubes has a fixed connection point with the corresponding first truss, which is a lifting point.

[0007] The thickness of the base plate is 35-40 mm.

[0008] The ultra-thin prestressed composite slab also includes multiple second trusses and multiple second truss tubes. The multiple second trusses are all arranged in the base plate. Each second truss is arranged in a cross shape with the first truss. Each second truss tube is fixedly connected to the corresponding second truss.

[0009] Each of the second truss tubes has a fixed connection point with the corresponding second truss, which is a lifting point.

[0010] This utility model discloses an ultra-thin prestressed composite slab. The base slab has several first trusses arranged longitudinally in the middle. The prestressed steel bars are high-strength indented steel bars, which, after pre-tensioning, can establish a large prestress within the base slab. The first trusses, arranged longitudinally with a relatively low height, are only for meeting the strength and rigidity requirements of the slab during transportation and installation, and do not directly bear the bending moment generated during the pouring of the concrete slab. Transverse horizontal reinforcement is provided within the base slab, including transverse horizontal additional reinforcement and transverse horizontal distribution reinforcement. The transverse horizontal additional reinforcement and transverse horizontal distribution reinforcement are evenly arranged, which not only prevents cracks in the base slab but also serves as the transverse main reinforcement of the composite slab, enabling the composite slab to bear forces in both directions. In the above method, the composite slab adopts a low-ribbed prestressed thin... The precast slab ensures the load-bearing capacity of the slab during transportation and installation, reduces the thickness of the slab, thereby reducing its self-weight, lowering transportation costs, and improving the efficiency of the prefabrication plant. By incorporating trusses and truss tubes, these serve both as reinforcing steel for the composite slab and prevent longitudinal cracks during transportation and installation, reducing rework and repair costs and saving on overall costs. Furthermore, the prestressed steel reinforcement at the bottom of the base slab not only prevents cracking of the upper part of the slab during transportation and when temporary supports are installed under the base slab, but also reduces cambering of the base slab, preventing downward deflection and cracking during use. Simultaneously, it ensures a flat bottom surface of the composite slab, eliminating the need for plastering. This achieves the goal of ensuring the load-bearing capacity of the slab during transportation and installation, preventing longitudinal cracks, reducing rework and repair costs, and saving on overall costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a structural schematic diagram of the ultra-thin prestressed composite slab of this utility model.

[0013] Figure 2 This is a schematic diagram of the base plate and reinforcement of this utility model.

[0014] Figure 3 This is a side view of the structure of the ultra-thin prestressed composite slab of this utility model.

[0015] Figure 4This is a structural schematic diagram of the ultra-thin prestressed composite slab of this utility model with the addition of a second truss and a second truss tube.

[0016] Figure 5 This is a top view of the structure of the ultra-thin prestressed composite slab of this utility model, with the addition of a second truss and a second truss tube.

[0017] 101-Base plate, 102-First truss, 103-First truss tube, 104-Prestressed steel bar, 105-Horizontal additional reinforcement, 106-Horizontal distribution reinforcement, 107-Lifting point, 108-Second truss, 109-Second truss tube. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] Please see Figures 1-5 This utility model provides an ultra-thin prestressed composite slab: including a base plate 101, multiple first trusses 102, multiple first truss tubes 103, multiple prestressed steel bars 104, multiple transverse horizontal additional bars 105, and multiple transverse horizontal distribution bars 106. The multiple prestressed steel bars 104 are all embedded in the base plate 101 and are evenly distributed within the base plate 101. The multiple transverse horizontal distribution bars 106 are all embedded in the base plate 101 and are evenly distributed within the base plate 101. The multiple first trusses 102 are all arranged in the base plate 101. Each first truss tube 103 is fixedly connected to the corresponding first truss 102 and is located above the base plate 101.

[0020] In this embodiment, a plurality of first trusses 102 are longitudinally arranged in the middle of the base slab 101. The prestressed steel bars 104 are high-strength indented steel bars, which can establish a large prestress in the base slab 101 after pre-tensioning. The first trusses 102 with a relatively low height are arranged longitudinally only to meet the strength and rigidity requirements of the slab during transportation and installation, and do not directly bear the bending moment generated during the pouring of the floor slab concrete. Transverse horizontal steel bars are arranged in the base slab 101. The transverse horizontal steel bars include transverse horizontal additional bars 105 and transverse horizontal distribution bars 106. The transverse horizontal additional bars 105 and transverse horizontal distribution bars 106 are evenly arranged, which can prevent cracks in the base slab 101 and also serve as the transverse main reinforcement of the composite slab, so that the composite slab can bear forces in both directions. In the above method, the composite slab adopts low The prestressed thin slab with ribs ensures the load-bearing capacity of the slab during transportation and installation, reduces the thickness of the precast slab, thereby reducing its self-weight, lowering transportation costs, and improving the efficiency of the prefabrication plant. By setting trusses and truss tubes, they can serve as reinforcing steel for the composite slab and prevent longitudinal cracks during transportation and installation, reducing rework and maintenance costs and saving costs. In addition, the prestressed steel bars 104 at the bottom of the base slab 101 not only prevent cracking of the upper part of the slab during transportation and when temporary supports are installed under the base slab 101, but also reduce the arching of the base slab 101, preventing the composite slab from deflecting downwards and cracking during use. At the same time, it makes the bottom surface of the composite slab flat, eliminating the need for plastering. This achieves the goal of ensuring the load-bearing capacity of the slab during transportation and installation, preventing longitudinal cracks, reducing rework and maintenance costs, and saving costs.

[0021] Furthermore, each of the first truss tubes 103 and the corresponding first truss 102 is a suspension point 107.

[0022] In this embodiment, the lifting point 107 facilitates the movement of the plate.

[0023] Furthermore, the thickness of the base plate 101 is 35-40 mm.

[0024] In this embodiment, the base plate 101 is 35-40mm thick, the first truss tube 103 protrudes more than 67mm from the plate surface, the concrete grade is C50 or higher, the plate width is more than 1.0m, and the plate length is more than 6m. The upper surface of the base plate 101 is pressed with a concave-convex surface or an artificially roughened surface. High-strength prestressed thin slabs with C50 or higher concrete are typically used for composite slabs with large spans, requiring a span of more than 6m to fully utilize the advantages of prestressed composite slabs. The wider the plate, the fewer the plate joints, the higher the efficiency of fabrication and installation, and the less lap reinforcement is needed. The plate width is 2.0m-2.5m, and the plate thickness should be as thin as possible while meeting transportation and installation requirements, with a thickness of 35-40m. The height of the steel pipe truss meets the strength and deflection requirements under its own weight and small construction loads, while also meeting the thickness requirements for passing through pipelines.

[0025] Furthermore, the ultra-thin prestressed composite slab also includes a plurality of second trusses 108 and a plurality of second truss tubes 109. The plurality of second trusses 108 are all disposed within the base plate 101. Each second truss 108 is arranged in a cross shape with the first truss 102. Each second truss tube 109 is fixedly connected to the corresponding second truss 108.

[0026] In this embodiment, by setting the second truss 108 and the second truss tube 109 as the reinforcing steel of the composite slab, the performance of the slab can be improved, and longitudinal cracks in the slab can be further prevented during transportation and installation.

[0027] Furthermore, each of the second truss tubes 109 is fixedly connected to the corresponding second truss 108 at a lifting point 107.

[0028] In this embodiment, the lifting point 107 facilitates the movement of the plate.

[0029] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. An ultra-thin prestressed composite slab, characterized in that, The system includes a base plate, multiple first trusses, multiple first truss tubes, multiple prestressed steel bars, multiple transverse horizontal additional bars, and multiple transverse horizontal distribution bars. The multiple prestressed steel bars are all embedded in the base plate and are evenly distributed within the base plate. The multiple transverse horizontal distribution bars are all embedded in the base plate and are evenly distributed within the base plate. The multiple first trusses are all arranged in the base plate. Each first truss tube is fixedly connected to the corresponding first truss and is located above the base plate.

2. The ultra-thin prestressed composite slab as described in claim 1, characterized in that, Each of the first truss tubes has a fixed connection point with the corresponding first truss, which is a lifting point.

3. The ultra-thin prestressed composite slab as described in claim 2, characterized in that, The thickness of the base plate is 35-40 mm.

4. The ultra-thin prestressed composite slab as described in claim 1, characterized in that, The ultra-thin prestressed composite slab also includes multiple second trusses and multiple second truss tubes. The multiple second trusses are all arranged inside the base plate. Each second truss is arranged in a cross shape with the first truss. Each second truss tube is fixedly connected to the corresponding second truss.

5. The ultra-thin prestressed composite slab as described in claim 4, characterized in that, Each of the second truss tubes has a fixed connection point with the corresponding second truss, which is a lifting point.

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