Active powder concrete composite slab base plate

Abstract

The utility model provides a kind of active powder concrete composite slab bottom plate, it is related to the field of construction engineering, including base plate, support framework, anchoring strip and prestressed steel wire;The base plate and the anchoring strip are all poured by active powder concrete, and the support framework is made of reinforcing steel, steel pipe or active powder concrete;The lower end of the support framework is connected to the base plate, and the upper end of the support framework is connected to the anchoring strip;The prestressed steel wire is arranged inside the active powder concrete base plate.The utility model alleviates the technical problems that the ordinary reinforced concrete composite slab component is heavy in the prior art, the transportation and installation efficiency is low, the formwork consumption is large, and it is not conducive to the implementation of construction engineering construction, at the same time, the bearing capacity and durability of the composite slab are increased, the workload can be reduced without support installation, and the effect of saving construction period is achieved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering, and in particular to a base plate for an active powder concrete composite slab. Background Technology

[0002] Precast composite slab components are widely used in building construction projects due to their good integrity, saving on formwork, and stable quality.

[0003] In existing technologies, the base slab of composite slabs is mostly made of reinforced concrete composite slabs. Reinforced concrete composite slabs usually consist of two parts - a precast base slab and a cast-in-place layer. In terms of construction process, the precast base slab is transported to the construction site after it is produced in the factory. Scaffolding and formwork systems are erected to support the precast base slab and the cast-in-place layer. After the precast base slab is installed, the concrete of the cast-in-place layer is poured (post-cast section). After that, the support system is removed after the concrete hardens.

[0004] Using ordinary reinforced concrete composite slabs as the base slab of composite slabs presents at least the following problems:

[0005] (1) The construction process includes a post-cast section, that is, after the precast base plate is installed, the concrete of the cast-in-place layer must be poured, which increases the construction time.

[0006] (2) During the construction process, scaffolding and formwork systems need to be erected to support the precast base slab and cast-in-place layer, especially in the post-cast section, where the amount of formwork and support is large.

[0007] (3) The main material of the bottom plate of ordinary reinforced concrete composite slab is traditional grade concrete, which has relatively low crack resistance and durability. In particular, cracks may appear under long-term load. The quality of its post-cast section directly affects the performance of the entire floor slab. If the quality control of the cast-in-place concrete is not properly implemented, it may lead to structural safety hazards.

[0008] (4) The extensive use of steel and cement in ordinary reinforced concrete composite slab bottom plates consumes a lot of materials, pollutes the environment, and increases carbon emissions.

[0009] (5) In order to ensure the effective connection between the precast base slab and the cast-in-place layer, ordinary reinforced concrete composite slabs are usually provided with outward reinforcing bars on all four sides, which makes transportation and installation very difficult, and there are potential construction quality hazards due to improper arrangement of outward reinforcing bars.

[0010] (6) The thickness of the bottom plate components of ordinary reinforced concrete composite slabs is more than 60mm, and the self-weight is large, which leads to low transportation efficiency, difficulty in on-site hoisting and construction, low installation efficiency, and long construction period. Utility Model Content

[0011] The purpose of this utility model is to provide a base plate for an active powder concrete composite slab to alleviate the above-mentioned technical problems existing in the prior art.

[0012] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0013] This utility model provides a reactive powder concrete composite slab base plate, including a base plate, a support frame, anchoring strips, and prestressed steel wires; the base plate and the anchoring strips are both cast from reactive powder concrete, and the support frame is made of steel bars, steel pipes, or reactive powder concrete; the lower end of the support frame is connected to the base plate, and the upper end of the support frame is connected to the anchoring strips; the prestressed steel wires are disposed inside the base plate.

[0014] In an optional technical solution of this utility model, the prestressed steel wires are distributed in a mesh pattern inside the substrate.

[0015] In this optional technical solution, the prestressed steel wires are distributed in a diamond-shaped or square-shaped mesh inside the substrate; optionally, the substrate includes a length direction, a width direction, and a thickness direction, with the sides containing the width direction side and the thickness direction side of the substrate being the left and right sides of the substrate; the connecting ends of the prestressed steel wires extend from the left and right sides of the substrate.

[0016] In an optional technical solution of this utility model, the upper end of the support frame is cast inside the anchoring strip plate, and the lower end of the support frame is cast inside the substrate.

[0017] In an optional technical solution of this utility model, the prestressed steel wire is cast into an integral structure with the substrate by pre-tensioning.

[0018] In the optional technical solution of this utility model, the anchoring strip plate is provided with at least one.

[0019] In an optional technical solution of this utility model, the thickness of the substrate is greater than or equal to 30 mm and less than or equal to 50 mm.

[0020] The beneficial effects that the reactive powder concrete composite slab base plate provided in this embodiment of the invention can achieve include:

[0021] The reactive powder concrete composite slab base plate provided in this embodiment of the utility model includes a base plate, a support frame, an anchoring strip plate, and prestressed steel wires; the base plate and the anchoring strip plate are both cast from reactive powder concrete, and the support frame is made of steel bars, steel pipes, or reactive powder concrete; the lower end of the support frame is connected to the base plate, and the upper end of the support frame is connected to the anchoring strip plate; the prestressed steel wires are located inside the base plate.

[0022] The active powder concrete composite slab base plate provided in this embodiment of the invention can achieve at least the following beneficial effects:

[0023] (1) The construction process eliminates on-site pouring (post-pouring section), which helps to reduce construction costs and save construction time. Compared with existing technologies, the installation period can be reduced by 50%.

[0024] (2) The construction process has no post-pouring section. Multiple active powder concrete composite slabs are spliced ​​together with tight joints to achieve supportless installation, which reduces the amount of formwork and support used, and can further reduce labor and save construction time.

[0025] (3) Both the base plate and the anchor plate are made of reactive powder concrete. Reactive powder concrete (RPC) is a high-performance concrete that is widely used in modern construction projects due to its excellent mechanical properties and durability. Reactive powder concrete has the characteristics of ultra-high strength, high durability and good volume stability. In addition, the microstructure of reactive powder concrete is very dense with almost no pores, so it has excellent crack resistance and can effectively prevent the generation and development of cracks, thus extending the service life of buildings. The base plate of the reactive powder concrete composite slab made in this way has extremely high compressive strength and tensile strength, which can provide sufficient load-bearing capacity with a relatively thin thickness. It is not easy to crack, and its casting process is relatively simple and easy to process. At the same time, it is lightweight and easy to transport and hoist.

[0026] (4) The production process of reactive powder concrete uses high-efficiency raw materials and production technology. Compared with traditional reinforced concrete, it has lower carbon emissions and is in line with the development trend of green building.

[0027] The embodiments of this utility model can also achieve other beneficial effects to solve other technical problems described in the background art of this application. For details, please refer to the detailed description of the specific implementation method section of this application specification. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A front view or rear view of the bottom plate of the reactive powder concrete composite slab provided in an embodiment of this utility model;

[0030] Figure 2A side view of the bottom plate of the reactive powder concrete composite slab provided in an embodiment of this utility model;

[0031] Figure 3 This is a top view of the bottom plate of the active powder concrete composite slab provided in an embodiment of the present invention, wherein the right side is shown as a normal top view and the left side is shown as a perspective schematic diagram of the distribution of prestressed steel wires inside the substrate.

[0032] Icons: 1-Baseboard; 2-Support frame; 3-Anchoring strip; 4-Prestressed steel wire; 41-Connecting end. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, the terms "horizontal" and "vertical" do not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] This embodiment provides a substrate for an active powder concrete composite slab, comprising at least a substrate. The substrate includes a length direction, a width direction, and a thickness direction. The sides containing the width and thickness directions of the substrate are designated as the left and right sides of the substrate, respectively. The sides containing the length and thickness directions of the substrate are designated as the front and rear sides of the substrate. (Refer to...) Figures 1 to 3 The base plate of the reactive powder concrete composite slab specifically includes a base plate 1, a supporting frame 2, anchoring strips 3, and prestressed steel wires 4. The base plate 1 and anchoring strips 3 are both cast from reactive powder concrete, while the supporting frame 2 is made of reinforcing steel, steel pipes, or reactive powder concrete. The lower end of the supporting frame 2 is connected to the base plate 1, and the upper end of the supporting frame 2 is connected to the anchoring strips 3. The prestressed steel wires 4 are located inside the base plate 1.

[0041] The reactive powder concrete composite slab base plate provided in this embodiment is a precast base plate. In terms of construction process, multiple precast reactive powder concrete composite slab base plates are directly and seamlessly connected (tightly spliced) without the need for additional concrete pouring on site, that is, there is no post-pouring section.

[0042] The reactive powder concrete composite slab base plate provided in this embodiment can achieve at least the following beneficial effects:

[0043] (1) The construction process eliminates on-site pouring (post-pouring section), which helps to reduce construction costs and save construction time. Compared with existing technologies, the installation period can be reduced by 50%.

[0044] (2) The construction process has no post-pouring section. Multiple active powder concrete composite slabs are spliced ​​together with tight joints to achieve supportless installation, which reduces the amount of formwork and support used, and can further reduce labor and save construction time.

[0045] (3) Both the base plate 1 and the anchor plate 3 are made of reactive powder concrete. Reactive powder concrete (RPC) is a high-performance concrete that is widely used in modern construction projects due to its excellent mechanical properties and durability. Reactive powder concrete has the characteristics of ultra-high strength, high durability and good volume stability. In addition, the microstructure of reactive powder concrete is very dense with almost no pores, so it has excellent crack resistance and can effectively prevent the generation and development of cracks, thus extending the service life of buildings. The base plate of the reactive powder concrete composite slab made therefrom has extremely high compressive strength and tensile strength, which can provide sufficient load-bearing capacity with a relatively thin thickness. It is not easy to crack, and its casting process is relatively simple and easy to process. At the same time, it is lightweight and easy to transport and hoist.

[0046] (4) The production process of reactive powder concrete uses high-efficiency raw materials and production technology. Compared with traditional reinforced concrete, it has lower carbon emissions and is in line with the development trend of green building.

[0047] In the optional technical solution of this embodiment, the prestressed steel wires 4 are distributed in a grid pattern inside the substrate 1. Specifically, they can be distributed in a diamond grid pattern or a square grid pattern inside the substrate 1, but are not limited to this. By providing prestressed steel wires 4 in a grid pattern inside the substrate 1, the structural strength of the substrate 1 can be further improved.

[0048] In this optional technical solution, the substrate 1 includes a length direction, a width direction, and a thickness direction, with the sides containing the width direction side and the thickness direction side of the substrate 1 as the left and right sides of the substrate 1. The connecting ends 41 of the prestressed steel wire 4 extend from the left and right sides of the substrate 1. This achieves at least the following beneficial effects: the extended steel wire connecting ends 41 are only provided on the two short sides, which simplifies the workload of on-site steel wire binding, speeds up the installation, reduces construction quality problems caused by improper arrangement of the extended steel wire, and is more conducive to transportation.

[0049] In the optional technical solution of this embodiment, the upper end of the support frame 2 is cast inside the anchor plate 3, and the lower end of the support frame 2 is cast inside the substrate 1. This manufacturing method can further improve the overall structural strength of the active powder concrete composite slab bottom plate.

[0050] In an optional technical solution of this embodiment, the prestressed steel wire 4 is cast into an integral structure with the substrate 1 using a pre-tensioning method. In the pre-tensioning method, the prestressed steel wire 4 is tensioned and fixed on the platform or template before the reactive powder concrete is poured. After the reactive powder concrete hardens and reaches the designed strength, the tension of the prestressed steel wire 4 is released, causing it to retract. The resulting shrinkage compresses the reactive powder concrete, thereby applying pre-stress to the reactive powder concrete and ensuring the quality of the substrate 1.

[0051] In the optional technical solutions of this embodiment, the anchoring strip 3 is provided with at least one, including but not limited to one, two, three or more.

[0052] In the optional technical solution of this embodiment, the thickness of the substrate 1 is greater than or equal to 30mm and less than or equal to 50mm. According to engineering tests, the thickness of the substrate of the active powder concrete composite plate is less than or equal to 50mm and does not affect its structural strength. The self-weight of the base plate component under this size is lower than that of the ordinary reinforced concrete composite plate base plate, and the transportation efficiency and installation efficiency are higher.

[0053] In a preferred embodiment of this example, each of the optional structures of the above-described optional embodiments is provided.

[0054] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A bottom plate for an active powder concrete composite slab, characterized in that: It includes a base plate (1), a support frame (2), an anchoring strip (3), and prestressed steel wire (4). The substrate (1) and the anchor plate (3) are both made of reactive powder concrete, and the support frame (2) is made of steel bars, steel pipes or reactive powder concrete; The lower end of the support frame (2) is connected to the base plate (1), and the upper end of the support frame (2) is connected to the anchor plate (3). The prestressed steel wire (4) is disposed inside the substrate (1).

2. The bottom plate of the reactive powder concrete composite slab according to claim 1, characterized in that: The prestressed steel wire (4) is distributed in a grid pattern inside the substrate (1).

3. The bottom plate of the reactive powder concrete composite slab according to claim 2, characterized in that: The substrate (1) includes a length direction, a width direction and a thickness direction, with the sides of the substrate (1) where the width direction side and the thickness direction side are located as the left side and right side of the substrate (1): the connecting end (41) of the prestressed steel wire (4) extends out of the substrate (1) from the left side and right side of the substrate (1).

4. The bottom plate of the reactive powder concrete composite slab according to claim 2, characterized in that: The prestressed steel wire (4) is distributed in a diamond-shaped grid inside the substrate (1).

5. The bottom plate of the reactive powder concrete composite slab according to claim 1, characterized in that: The upper end of the support frame (2) is cast inside the anchor plate (3), and the lower end of the support frame (2) is cast inside the base plate (1).

6. The bottom plate of the reactive powder concrete composite slab according to claim 1, characterized in that: The prestressed steel wire (4) is cast into an integral structure with the substrate (1) by pre-tensioning.

7. The bottom plate of the reactive powder concrete composite slab according to claim 1, characterized in that: The anchoring strip (3) is provided with at least one.

8. The bottom plate of the reactive powder concrete composite slab according to claim 1, characterized in that: The thickness of the substrate (1) is greater than or equal to 30 mm and less than or equal to 50 mm.

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