Prestressed laminated slab

Abstract

The utility model discloses a prestressed laminated slab. The laminated slab comprises a bottom plate, a plurality of web member steel bars and a fixed mold, the fixed mold is located above the bottom plate, and the fixed mold is fixedly connected with the bottom plate through web member steel bars; a plurality of lower chord steel bars are laid in the bottom plate, and the length directions of every two adjacent lower chord steel bars are parallel to each other; the web member steel bars are located above the lower chord steel bars, and every two adjacent web member steel bars are located on the two sides of the lower chord steel bars in the length direction of the lower chord steel bars correspondingly. The web member steel bars are in a wave shape, the wave troughs of the web member steel bars are fixedly connected with the lower chord steel bars, and the wave crests of the web member steel bars are fixedly connected with the fixed mold located above the web member steel bars. A plurality of prestressed steel bars are further laid in the bottom plate and fixedly connected with the bottom plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building engineering, and specifically relates to a prestressed composite slab. BACKGROUND

[0002] Prestressed ribbed concrete composite slab (hereinafter referred to as "ribbed composite slab") is an indispensable part of modern fabricated building structure, which is composed of prefabricated prestressed ribbed concrete bottom plate and upper post-cast concrete composite layer. This structural design not only ensures the integrity, crack resistance and bearing capacity of the floor slab, but also expands its applicable span range and performs well in economy.

[0003] The prefabricated prestressed ribbed concrete bottom plate is usually manufactured in the factory. In the production process, no steel is arranged laterally, but high-strength prestressed steel is arranged longitudinally, which helps to enhance the stiffness and bending resistance of the bottom plate. The thickness of the bottom plate is generally not less than 50mm to ensure sufficient strength to resist various loads that may be encountered during construction or use. In addition, the upper part of the bottom plate is designed with rib structure, which can effectively offset the bending moment generated by the prestressed steel and provide necessary compressive stress support when bearing construction or permanent load.

[0004] During the site construction stage, the prefabricated bottom plate serves as a permanent formwork and bears the structure self-weight and temporary load during construction. Once the upper post-cast concrete composite layer solidifies and is tightly combined with the prefabricated bottom plate, the entire composite slab system forms a unified whole, which shares the load transmitted from the upper structure. Such design not only improves the safety and stability of the structure, but also simplifies the site construction process and reduces the demand for traditional formwork.

[0005] At present, there are mainly two kinds of rib forms of ribbed composite slab commonly seen in the market: solid rib and concrete hollow rib. The design of solid rib allows long-line extrusion forming technology to be used for efficient production, but this design often leads to limited space for pipeline arrangement, increasing the complexity of the construction site. On the contrary, although the concrete hollow rib can alleviate the problem of pipeline arrangement to a certain extent, due to its special internal structure, it is difficult to adapt to the long-line extrusion forming process, thereby affecting the production efficiency. SUMMARY

[0006] In view of the above-mentioned deficiencies of the prior art, the utility model discloses a prestressed composite board, through the improvement of the plate rib structure in the prior art, the plate rib structure is composed of the fixed mould upper plate, fixed mould, web steel bar and lower chord steel bar, these parts form the whole, can resist the reverse bending moment formed by the prestressed tendon, can resist the compressive stress when having construction or permanent load, simultaneously, the gap formed between the web steel bar is convenient for the on-site pipeline arrangement, and the fixed mould upper plate and concrete bottom plate can be simultaneously produced efficiently through the long line table extrusion forming process, so as to solve the problems of the ribbed composite board with solid rib form in the prior art, such as the pipeline arrangement being limited by the structure, increasing the construction difficulty and the ribbed composite board with concrete hollow rib being difficult to adapt to the long line table extrusion forming process, and further affecting the production efficiency.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A prestressed composite board, the composite board includes a bottom plate, a plurality of web steel bars and a fixed mould, the fixed mould is located above the bottom plate, and the fixed mould is fixedly connected with the bottom plate through the web steel bars, a plurality of lower chord steel bars are laid in the bottom plate, and the length directions of the adjacent two lower chord steel bars are parallel to each other, the web steel bars are located above the lower chord steel bars, and the adjacent two web steel bars are located on the two sides of the lower chord steel bars along the length directions of the lower chord steel bars, the web steel bars are in a wave shape, the wave troughs of the web steel bars are fixedly connected with the lower chord steel bars, the wave crests of the web steel bars are fixedly connected with the fixed mould located above the web steel bars, and a plurality of prestressed steel bars are also laid in the bottom plate, and the prestressed steel bars are fixedly connected with the bottom plate.

[0009] Preferably, the wave crests of the adjacent two web steel bars extend in a direction away from each other, are then bent in a direction away from each other, and continue to extend in a direction parallel to the plane where the bottom plate is located to form connecting ends, and the web steel bars are fixedly connected with the fixed mould through the connecting ends.

[0010] Preferably, a fixed mould upper plate is further arranged above the fixed mould, and the fixed mould upper plate is fixedly connected with the fixed mould.

[0011] Preferably, the wave troughs of the web steel bars are inserted into the bottom plate and then fixedly connected with the lower chord steel bars.

[0012] Preferably, the length directions of the prestressed steel bars are parallel to the length directions of the lower chord steel bars.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model discloses an improved plate rib structure in the superimposed board, compared with the traditional solid rib or concrete hollow rib design, the prestressed superimposed board adopts the composite structure that is composed of fixed mould upper plate, fixed mould, web steel bar and lower chord steel bar, the fixed mould upper plate and bottom plate in this structure can be produced efficiently through long line table extrusion forming process at the same time, and the excellent forming quality is guaranteed, and the position and structure of the web steel bar are improved, so that a plurality of gaps are formed between the web steel bars, the gaps are ingeniously utilized, great convenience is provided for the arrangement of on-site pipeline, and the great challenge encountered when the solid rib plate is arranged on site is effectively solved.

[0015] 2. The utility model discloses a fixed mould is arranged in the superimposed board, not only provides necessary support for the fixed mould upper plate, but also serves as the concrete support platform in long line table extrusion process, and the feasibility and stability of production are greatly improved, the problem that the traditional rib plate with hole is difficult to produce through long line table extrusion process is solved, and efficient industrial production process can be realized.

[0016] 3. The fixed mould in the utility model can adopt the form of steel mesh or profiled steel plate, and is fixed together with the web steel bar through the welding mode, so as to enhance the connecting strength between the fixed mould upper plate and the steel bar, in addition, the structure helps to resist the reverse bending moment generated by the prestressed tendon, and further improves the overall stability and carrying capacity of the superimposed board, which not only ensures the safety of the building structure, but also provides greater flexibility for the designer to meet different architectural design requirements.

[0017] 4. The improvement on the superimposed board structure makes it adapt to the continuous extrusion forming process of long line table, the fixed mould provides necessary support for the fixed mould upper plate, and also serves as the concrete support platform in long line table extrusion process, and the feasibility and stability of production are greatly improved, the problem that the traditional rib plate with hole is difficult to produce through long line table extrusion process is solved, the superimposed board can be produced in batches in the mode of continuous extrusion forming, and finally realizes efficient industrial production process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the utility model discloses a prestressed superimposed board.

[0019] Figure 2 It is a structure schematic view of the web steel bar and the bottom plate and the fixed mould after being connected.

[0020] Figure 3 It is a structure schematic view of the web steel bar and the lower chord steel bar after being connected.

[0021] Figure 4 It is a structure schematic view of the connecting end of the web steel bar and the fixed mould after being connected.

[0022] In the figure: bottom plate 1, web reinforcement 2, formwork 3, lower chord reinforcement 4, prestressed reinforcement 5, connecting end 6, formwork upper plate 7, trough 8. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the utility model belong to the protection scope of the utility model.

[0024] The utility model provides a kind of prestressed composite board, the composite board includes bottom plate 1, multiple web reinforcement 2 and formwork 3.The formwork is located above bottom plate, and formwork is fixedly connected with bottom plate by web reinforcement.In the bottom plate, multiple lower chord reinforcements 4 are laid, and the length direction of adjacent two lower chord reinforcements is parallel to each other.The web reinforcement is located above lower chord reinforcement, and adjacent two web reinforcements are respectively located on both sides of lower chord reinforcement along its length direction.The web reinforcement is in wavy shape, the trough of web reinforcement is fixedly connected with lower chord reinforcement, and the crest of web reinforcement is fixedly connected with formwork located above it.In the bottom plate, multiple prestressed reinforcements 5 are also laid, and prestressed reinforcement is fixedly connected with bottom plate.Prestressed reinforcement is constructed by using pre-tensioning method, i.e., prestressed reinforcement is first tensioned to design pre-tensioning force, cooperates with long line table, then forming extruding machine is extruded from one side to the other side along long line table, which can maximize to improve site utilization and improve production efficiency.In addition, the arrangement of prestressed reinforcement can improve the flexural capacity and stiffness of floor, and can further improve the unsupported span of plate, so that the design can reduce or even not need support, improve the construction efficiency of site.

[0025] In the specific implementation, the crests of the two adjacent web steel bars extend in the direction away from each other, then are bent in the direction away from each other, and then continue to extend in the direction parallel to the plane of the bottom plate to form the connecting end 6, and the web steel bar is connected with the fixed mold through the connecting end. In this way, not only the gap between the two adjacent web steel bars is formed, but also the wave-shaped structure of the single web steel bar forms many gaps, and these gaps are connected with each other and can be used to facilitate the arrangement of the pipeline on site, thereby effectively solving the great challenge of the solid ribbed slab in the pipeline arrangement on site. The fixed mold upper plate 7 is further arranged above the fixed mold, and the fixed mold upper plate is connected with the fixed mold. The fixed mold provides necessary support for the fixed mold upper plate and also serves as a concrete support platform in the long-line table extrusion process, thereby greatly improving the feasibility and stability of the production. This design solves the problem that the traditional ribbed slab with holes cannot be produced by the long-line table extrusion process, and can realize the efficient industrial production process. The fixed mold can be made of steel mesh or profiled steel plate, and the fixed mold is connected with the web steel bar by welding, thereby enhancing the connection between the fixed mold upper plate and the web steel bar and resisting the bending moment generated by the prestressed steel bar. The bottom plate is a concrete bottom plate formed by pouring concrete, and the trough of the web steel bar is inserted into the bottom plate and then connected with the lower chord steel bar. The concrete bottom plate and the fixed mold upper plate are simultaneously produced by the long-line table extrusion forming process, thereby being higher in production efficiency and better in forming quality and security. The length direction of the prestressed steel bar is parallel to the length direction of the lower chord steel bar, and the prestressed steel bar can be arranged between the two adjacent lower chord steel bars or multiple prestressed steel bars can be arranged between the two adjacent lower chord steel bars. The prestressed steel bar arranged in the bottom plate improves the bending bearing capacity and stiffness of the floor and the unsupported span of the floor. Therefore, the arrangement position of the prestressed steel bar is not limited.

[0026] The utility model is not limited to the above-mentioned embodiment, and the same or similar structure as the above-mentioned embodiment of the utility model is adopted, and all falls within the protection scope of the utility model.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and do not limit the technical solutions. Those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, and all should be covered in the scope of the claims of the utility model.

Claims

1. A prestressed composite slab, characterized by, The laminated slab comprises a bottom plate (1), a plurality of web steel bars (2) and a fixed mold (3); the fixed mold is located above the bottom plate and is fixedly connected with the bottom plate through the web steel bars; A plurality of lower chord steel bars (4) are laid in the bottom plate, and the length directions of the adjacent two lower chord steel bars are parallel to each other; the web steel bars are located above the lower chord steel bars, and the adjacent two web steel bars are respectively located on the two sides of the lower chord steel bars along the length directions thereof; the web steel bars are in a wave shape, the wave troughs (8) of the web steel bars are fixedly connected with the lower chord steel bars, and the wave crests of the web steel bars are fixedly connected with the fixed mold located above the web steel bars; A plurality of prestressed steel bars (5) are also laid in the bottom plate, and the prestressed steel bars are fixedly connected with the bottom plate.

2. The prestressed composite slab according to claim 1, wherein The wave crests of the adjacent two web steel bars extend in a direction away from each other, are then bent in a direction away from each other, and continue to extend in a direction parallel to the plane where the bottom plate is located to form connecting ends (6), and the web steel bars are fixedly connected with the fixed mold through the connecting ends.

3. The prestressed composite slab as claimed in claim 1, wherein, A fixed mold upper plate (7) is also arranged above the fixed mold, and the fixed mold upper plate is fixedly connected with the fixed mold.

4. The prestressed composite slab as claimed in claim 1, wherein, The wave troughs of the web steel bars are inserted into the bottom plate and are then fixedly connected with the lower chord steel bars.

5. The prestressed composite slab as claimed in claim 1, wherein, The length directions of the prestressed steel bars are parallel to the length directions of the lower chord steel bars.

Images