Single board concrete structure and construction method thereof

Abstract

The application relates to a single-plate concrete structure and a construction method thereof. The single-plate concrete structure comprises a base plate, a stand column, a steel mesh, a restraint and a concrete pouring body. The stand column is prefabricated on the base plate. The steel mesh is arranged on the base plate. The restraint is connected between two stand columns and is located at the upper part of the steel mesh. The stand column, the restraint and the steel mesh are poured into the concrete pouring body. The stand column and the restraint are connected to replace the tie bar. The stand column is prefabricated on the base plate in a factory, and only the restraint needs to be connected during on-site installation, so that the on-site construction amount is small. Since the restraint is fixedly connected with the stand column, the restraint effect on the steel mesh is good, and meanwhile, the shear capacity of the single-plate concrete structure can be ensured.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to single-slab concrete structures and their construction methods. Background Technology

[0002] Compared with traditional reinforced concrete structures, single-slab concrete structures have the following advantages when a base plate is added at the bottom to replace the bottom reinforcement: (1) the base plate can replace the formwork, making it easier to pour concrete; (2) the base plate has high stress efficiency, which can significantly improve the bending bearing capacity of the structure; (3) under the cover of the base plate, the bottom cracks of the concrete are not exposed, which can improve the durability of the structure. Therefore, it has good application prospects in structures such as bridge decks, complex floor slabs, and nuclear power plant containment structures.

[0003] However, after setting the base plate, it is not convenient to set the stirrups in the reinforced concrete structure, resulting in insufficient shear resistance and constraint on the longitudinal reinforcement of the single-slab concrete structure, requiring special measures. There are two common methods: (1) Set single-limb tie bars or double-limb U-shaped tie bars perpendicular to the steel plate, with the upper end of the tie bar connected to the longitudinal and transverse reinforcement bars and the lower end welded to the steel plate. This method requires a large amount of on-site welding work, and the residual stress of welding has an adverse effect on the steel plate, making it difficult to apply to actual projects; (2) Replace the ordinary studs on the steel plate with J-shaped studs with hooks, connect the upper end of the tie bar to the longitudinal and transverse reinforcement bars, and set the lower end with hooks to hook the J-shaped studs. This eliminates the need for on-site welding, but on-site hooking operations are still required. Considering that the tie bars are usually thick and numerous, the workload is still considerable, and the effect of hooking between the two is not easy to guarantee. Summary of the Invention

[0004] Therefore, it is necessary to provide a single-slab concrete structure and its construction method to address the issue of large on-site construction volume of single-slab concrete structures.

[0005] A single-slab concrete structure, the single-slab concrete structure comprising:

[0006] substrate;

[0007] The columns are prefabricated on the substrate;

[0008] Steel mesh is laid on the base plate;

[0009] A constraint member, connected between two columns, and located on the side of the reinforcing mesh away from the base plate; and

[0010] The concrete casting body, including the columns, restraints, and steel mesh, is cast within the concrete casting body.

[0011] In one embodiment, the single-slab concrete structure includes a reinforcing plate disposed on the substrate and extending in any direction along the substrate, and the column includes a first column disposed on the reinforcing plate.

[0012] In one embodiment, the reinforcing plate includes a plurality of first reinforcing plates arranged sequentially along a first direction and a plurality of second reinforcing plates arranged sequentially along a second direction, the first reinforcing plates and the second reinforcing plates being interleaved to divide the substrate into a plurality of substrate units.

[0013] In one embodiment, the column further includes a second column, which is disposed on the substrate and located within the substrate unit, wherein the end of the second column away from the substrate is at the same height as the end of the first column away from the substrate;

[0014] The constraint is connected between two adjacent first columns, between an adjacent first column and a second column, or between two adjacent second columns.

[0015] In one embodiment, the reinforcing mesh includes intersecting first and second reinforcing bars, with the first reinforcing bars located on the side of the second reinforcing bars closer to the constraint member, and the constraint member being intersected with the first reinforcing bars.

[0016] In one embodiment, the constraint member is perpendicular to the first reinforcing bar, and the first reinforcing bar is perpendicular to the second reinforcing bar.

[0017] In one embodiment, the two ends of the constraint member are respectively bolted to two adjacent columns.

[0018] In one embodiment, the base plate is a steel plate, and the column and the constraint member are made of I-beams, square steel pipes or channel steel.

[0019] In one embodiment, the reinforcing plate includes a web and a flange disposed on the web, one end of the web away from the flange is welded to the base plate, and the first column is disposed on the flange.

[0020] A construction method for a single-slab concrete structure includes the following steps:

[0021] A reinforcing plate is prefabricated on the substrate, and a column is prefabricated on the reinforcing plate or the substrate to form a substrate structural component;

[0022] Prefabricated base plate structural components are installed on the construction site;

[0023] Lay steel mesh on the reinforcing plate;

[0024] Install restraints between the columns, ensuring the restraints are positioned within the reinforcing mesh;

[0025] Pouring concrete.

[0026] The aforementioned single-slab concrete structure and its construction method involve prefabrication in the factory, where the columns are first welded to the base plate. During on-site construction, only a steel mesh needs to be laid between the columns, then the restraints are connected to the columns, and finally, concrete is poured. The columns are welded to the base plate, and the restraints are connected between any two columns, forming a closed structure that encloses the steel mesh and restrains it. The connection between the columns and the restraints replaces tie rods. Since the columns are prefabricated to the base plate in the factory, only the restraints need to be connected during on-site installation, resulting in minimal on-site construction. Furthermore, the fixed connection between the restraints and the columns provides excellent restraint of the steel mesh while ensuring the shear resistance of the single-slab concrete structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a single-slab concrete structure in one embodiment.

[0028] Figure 2 This is a step-by-step diagram of the construction method for a single-slab concrete structure in one embodiment.

[0029] Reference numerals: 10, base plate; 11, base plate unit; 20, column; 21, first column; 22, second column; 30, constraint member; 40, steel mesh; 41, first reinforcing bar; 42, second reinforcing bar; 50, reinforcing plate; 51, first reinforcing plate; 52, second reinforcing plate; 60, stud. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 An embodiment of this application provides a single-slab concrete structure, including a base plate 10, columns 20, a reinforcing mesh 40, restraint members 30, and a concrete casting body. The columns 20 are prefabricated on the base plate 10. The reinforcing mesh 40 is erected on the base plate 10. The restraint members 30 connect two columns 20 and are located on the side of the reinforcing mesh 40 away from the base plate 10. The columns 20, restraint members 30, and reinforcing mesh 40 are all cast into the concrete casting body.

[0037] In this embodiment, during prefabrication in the factory, the columns 20 can be welded to the base plate 10 first. During on-site construction, only a steel mesh 40 needs to be erected between the columns 20, then the restraint members 30 are connected to the columns 20, and finally concrete is poured. The columns 20 are welded to the base plate 10, and the restraint members 30 are connected between any two columns 20, forming a closed structure that surrounds the steel mesh 40 and restrains it. The connection between the columns 20 and the restraint members 30 replaces tie rods. Since the columns 20 are prefabricated to the base plate 10 in the factory, only the restraint members 30 need to be connected during on-site installation. Compared to the tie rod installation method, the on-site construction work in this application is much smaller. Furthermore, because the restraint members 30 are fixedly connected to the columns 20, the restraint effect on the steel mesh 40 is good, while also ensuring the shear resistance of the single-slab concrete structure.

[0038] In addition, the constraint strength of the connection between the constraint member 30 and the column 20 is stronger than that of the tie rod. Therefore, the distance between two adjacent columns 20 can be selectively extended, thereby reducing the number of constraint members 30, thus reducing the amount of on-site work and improving construction efficiency.

[0039] It should be noted that the reinforcing mesh 40 can be directly set on the base plate 10. In this case, pads or support frames need to be set on the base plate 10 to support the reinforcing mesh 40.

[0040] In some embodiments, the single-slab concrete structure includes a reinforcing plate 50 disposed on the base plate 10 and extending in any direction along the base plate 10, the column 20 including a first column 21 disposed on the reinforcing plate 50, and the steel mesh 40 erected on the reinforcing plate 50.

[0041] In this embodiment, a reinforcing plate 50 is provided on the substrate 10. The reinforcing plate 50 extends along any direction of the substrate 10 and is used to enhance the rigidity of the substrate 10, preventing the substrate 10 from bending or deforming during transportation and construction. A first column 21 is disposed on the reinforcing plate 50, which supports the first column 21. Compared to directly placing the first column 21 on the substrate 10, placing the first column 21 on the reinforcing plate 50 reduces the height of the first column 21, thereby reducing material usage and saving costs.

[0042] Furthermore, the reinforcing plate 50 includes a plurality of first reinforcing plates 51 arranged sequentially along a first direction and a plurality of second reinforcing plates 52 arranged sequentially along a second direction. The first reinforcing plates 51 and the second reinforcing plates 52 are orthogonal or oblique to divide the substrate 10 into a plurality of substrate units 11.

[0043] In this embodiment, by providing a plurality of orthogonal or oblique first reinforcing plates 51 and a plurality of second reinforcing plates 52 on the substrate 10, the first reinforcing plates 51 extend along the second direction on the substrate 10, and the second reinforcing plates 52 extend along the first direction on the substrate 10, that is, the first reinforcing plates 51 and the second reinforcing plates 52 form a grid structure, so as to further enhance the rigidity of the substrate 10 and prevent the substrate 10 from bending and deforming.

[0044] In some embodiments, the column 20 further includes a second column 22, which is disposed on the substrate 10 and located within the substrate unit 11. The end of the second column 22 away from the substrate 10 is at the same height as the end of the first column 21 away from the substrate 10. The constraint member 30 is connected between two adjacent first columns 21, between an adjacent first column 21 and a second column 22, or between two adjacent second columns 22.

[0045] In this embodiment, a second column 22 is provided in the substrate unit 11, which allows one end of the constraint member 30 to be connected to the second column 22 and the other end to be connected to the adjacent first column 21 or the adjacent second column 22. This reduces the length of the constraint member 30 and prevents the constraint member 30 from being too long and difficult to construct on site when the span between two adjacent first columns 21 is large.

[0046] Specifically, taking a rectangular structure formed orthogonally by two first reinforcing plates 51 and two second reinforcing plates 52 as an example, each first reinforcing plate 51 has three first pillars 21 arranged sequentially along its length, with one first pillar 21 at each intersection of the first reinforcing plate 51 and the two second reinforcing plates 52. Each second reinforcing plate 52 has two first pillars 21 arranged sequentially along its length. A second pillar 22 along the length of the second reinforcing plate 52 is provided within the base unit 11. A constraint member 30 connects adjacent first pillars 21 and adjacent first pillars 21 and second pillars 22.

[0047] In some embodiments, the reinforcing mesh 40 includes intersecting first reinforcing bars 41 and second reinforcing bars 42, with the first reinforcing bars 41 located on the side of the second reinforcing bars 42 close to the constraint member 30, and the constraint member 30 and the first reinforcing bars 41 being intersected.

[0048] In this embodiment, the second reinforcing bar 42, the first reinforcing bar 41, and the constraint member 30 are arranged sequentially from bottom to top. The constraint member 30 and the first reinforcing bar 41 are staggered, thereby constraining the first reinforcing bar 41 and preventing it from bulging upwards. The first reinforcing bar 41 and the second reinforcing bar 42 are also staggered, meaning that the first reinforcing bar 41 constrains the second reinforcing bar 42 and prevents it from bulging upwards.

[0049] It should be noted that the second reinforcing bar 42 is tied and fixed with the first reinforcing bar 41. During on-site construction, firstly, a spacer is placed on the reinforcing plate 50, then the second reinforcing bar 42 is lapped on the spacer, then the first reinforcing bar 41 is lapped on the second reinforcing bar 42, and finally the restraint member 30 is connected.

[0050] The restraint member 30 is positioned close to the reinforcing mesh 40. Specifically, the restraint member 30 is positioned close to the first reinforcing bar 41 to prevent the first reinforcing bar 41 from bulging upwards.

[0051] In other embodiments, the constraint member 30 may also be spaced apart from the first reinforcing bar 41.

[0052] Furthermore, the constraint member 30 is perpendicular to the first reinforcing bar 41, and the first reinforcing bar 41 is perpendicular to the second reinforcing bar 42.

[0053] In this embodiment, the constraint member 30 is perpendicular to the first reinforcing bar 41 to maximize the constraint effect of the constraint member 30 on the first reinforcing bar 41. The first reinforcing bar 41 is perpendicular to the second reinforcing bar 42 to maximize the constraint effect of the first reinforcing bar 41 on the second reinforcing bar 42.

[0054] In other embodiments, the constraint may include a first constraint and a second constraint, wherein the first constraint is perpendicular to the first reinforcing bar and the second constraint is perpendicular to the second reinforcing bar.

[0055] In some embodiments, the two ends of the constraint member 30 are respectively bolted to two adjacent columns 20. Compared to welding the ends of the constraint member 30 to the columns 20, which generates thermal stress, bolted connections do not generate thermal stress, thus avoiding the influence of residual stress on the columns 20. Furthermore, using bolted connections on the construction site is very convenient, eliminating on-site welding, reducing workload, and ensuring a reliable connection.

[0056] In some embodiments, the base plate 10 is a steel plate, the columns 20 are made of I-beams, square steel tubes, or channel steel, and the restraint members 30 are made of I-beams or angle steel. The steel plate is used to improve the load-bearing efficiency of the base plate 10, significantly improving the bending capacity and durability of the structure. The columns 20 and restraint members 30 are made of shaped steel, which has a larger area, higher stiffness and strength than reinforcing bars, thus greatly reducing their quantity and further reducing workload.

[0057] In some embodiments, the reinforcing plate 50 includes a web and a flange disposed on the web, with one end of the web away from the flange welded to the base plate 10, and a first post 21 disposed on the flange. The web and the flange form a T-shaped or L-shaped structure.

[0058] In some embodiments, studs 60 are provided on the substrate 10. The studs 60 are welded to the surface of the substrate 10 in an array. The studs 60 are used to enhance the bonding force between the substrate 10 and the concrete casting.

[0059] Combination Figure 2 As shown, one embodiment of this application also provides a construction method for a single-slab concrete structure, including the following steps:

[0060] A reinforcing plate 50 is prefabricated on the substrate 10, and a column 20 is prefabricated on the reinforcing plate 50 or the substrate 10 to form a substrate 10 structural component. Specifically, the substrate 10 is a steel plate, and a first reinforcing plate 51 and a second reinforcing plate 52 are welded onto the steel plate, such that the first reinforcing plate 51 and the second reinforcing plate 52 are orthogonal or oblique. A first column 21 is welded onto the first reinforcing plate 51 and the second reinforcing plate 52, and a second column 22 is provided within the substrate unit 11 separated by the first reinforcing plate 51 and the second reinforcing plate 52. The substrate structural component includes the substrate 10, the reinforcing plate 50, and the column 20. In addition, studs 60 need to be prefabricated on the substrate 10, and the studs 60 can be directly welded to the steel plate during factory prefabrication.

[0061] Prefabricated base plate structural components are installed on the construction site.

[0062] A reinforcing mesh 40 is lapped onto the reinforcing plate 50. Specifically, firstly, spacers are placed on either the first reinforcing plate 51 or the second reinforcing plate 52. Taking the placement of spacers on the first reinforcing plate 51 as an example, then the second reinforcing bar 42 is lapped onto the first reinforcing plate 51, wherein the second reinforcing bar 42 is perpendicular or oblique to the first reinforcing plate 51. Then, the first reinforcing bar 41 is lapped onto the second reinforcing bar 42, wherein the second reinforcing bar 42 is perpendicular or oblique to the first reinforcing bar 41.

[0063] Constraint members 30 are installed between the columns 20, and the constraint members 30 are positioned on the reinforcing mesh 40. Specifically, constraint members 30 are threaded onto two adjacent columns 20 so that the constraint members 30 are perpendicular to the first reinforcing bar 41.

[0064] Finally, concrete is poured to form a single-slab concrete structure.

[0065] In this embodiment, the column 20 is prefabricated onto the base plate 10 in the factory, and only the constraint member 30 needs to be connected during on-site installation, resulting in minimal on-site construction work. Furthermore, since the constraint member 30 is fixedly connected to the column 20, it provides good constraint on the steel mesh 40 while also ensuring the shear resistance of the single-slab concrete structure.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A single-slab concrete structure, characterized in that, The single-slab concrete structure includes: substrate; The columns are prefabricated on the substrate; Reinforcing mesh is laid on the base plate; A constraint member, connected between two columns, and located on the side of the reinforcing mesh away from the base plate; and The concrete casting body, the columns, restraints and steel mesh are all cast in the concrete casting body; A reinforcing plate is disposed on the substrate and extends along any direction of the substrate. The column includes a first column disposed on the reinforcing plate. The steel mesh is laid on the reinforcing plate. The reinforcing plate includes a plurality of first reinforcing plates arranged sequentially along a first direction and a plurality of second reinforcing plates arranged sequentially along a second direction. The first reinforcing plates and the second reinforcing plates are staggered to divide the substrate into a plurality of substrate units. The column further includes a second column, which is disposed on the substrate and located within the substrate unit. The end of the second column away from the substrate is at the same height as the end of the first column away from the substrate. The constraint member is connected between two adjacent first columns, between an adjacent first column and a second column, or between two adjacent second columns.

2. The single-slab concrete structure according to claim 1, characterized in that, The steel mesh includes intersecting first and second steel bars, with the first steel bar located on the side of the second steel bar closer to the constraint member, and the constraint member being intersected with the first steel bar.

3. The single-slab concrete structure according to claim 2, characterized in that, The constraint member is perpendicular to the first reinforcing bar, and the first reinforcing bar is perpendicular to the second reinforcing bar.

4. The single-slab concrete structure according to claim 1, characterized in that, The two ends of the constraint member are respectively bolted to the two adjacent columns.

5. The single-slab concrete structure according to claim 1, characterized in that, The base plate is a steel plate, and the columns and the constraint members are made of I-beams, square steel pipes or channel steel.

6. The single-slab concrete structure according to claim 1, characterized in that, The reinforcing plate includes a web and a flange disposed on the web. The end of the web away from the flange is welded to the base plate, and the first column is disposed on the flange.

7. A construction method for a single-slab concrete structure according to any one of claims 1-6, characterized in that, Includes the following steps: A reinforcing plate is prefabricated on the substrate, and a column is prefabricated on the reinforcing plate or the substrate to form a substrate structural component; Prefabricated base plate structural components are installed on the construction site; Lay steel mesh on the reinforcing plate; Install restraints between the columns, ensuring the restraints are positioned within the reinforcing mesh; Pouring concrete.

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