3D printed assembled box structure and its connection method

Abstract

The present invention discloses a 3D printed assembled box-type structure and a connection method thereof, wherein the 3D printed assembled box-type structure comprises a floor slab and a wall slab; the wall slab and the floor slab are box-type modules formed in one piece by 3D printing; a casting connection section is provided on the wall slab; when a plurality of box-type modules are combined and spliced ​​in a horizontal direction, the casting connection sections of the wall slabs of a plurality of adjacent box-type modules enclose a cavity extending in an up-and-down direction, and the cavity is used as a cast-in-place component template for on-site casting. The 3D printed assembled box-type structure of the present invention has high assembly efficiency, simple structure, high connection strength between a plurality of box-type modules and reduced labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering and construction, and in particular to a 3D printed assembled box-type structure and a connection method thereof. Background Art

[0002] my country's construction industry is promoting the development of prefabricated buildings, using modern production, transportation, installation and management methods to replace the decentralized and inefficient construction methods of the traditional construction industry. Currently, a lot of technological innovation support is still needed to achieve standardized design, factory production and assembly construction.

[0003] Compared with traditional casting technology, 3D printing concrete technology can ensure manufacturing accuracy, reduce construction costs and shorten construction period when producing complex modeling components. Using 3D printing technology to produce assembly components can help improve production efficiency, increase material utilization, and promote the development of construction industrialization.

[0004] At present, in 3D printed prefabricated structures, the connections between components are made using connectors and on-site post-casting strip construction methods. Templates need to be installed at the joints, and there is insufficient working space at the joints. The template reinforcement is difficult, resulting in reduced assembly efficiency, increased labor costs, and the inability to guarantee the construction quality of the joints. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a 3D printed assembled box-type structure with high assembly efficiency, simple structure, high connection strength between multiple box-type modules and reduced labor costs.

[0006] The 3D printed assembled box-type structure according to the first embodiment of the present invention comprises:

[0007] Floor slab;

[0008] The wall panel and the floor slab are box-type modules integrally formed by 3D printing; a casting connection section is provided on the wall panel; when a plurality of the box-type modules are combined and spliced ​​in the horizontal direction, the casting connection sections of the wall panels of a plurality of adjacent box-type modules enclose a cavity extending in the up and down directions, and the cavity serves as a template for cast-in-place components for on-site casting.

[0009] According to the 3D printed assembled box-type structure of the first embodiment of the invention, 3D technology is used to print wall panels and floor slabs. By setting a cast connection section on the wall panel of each box-type module, when multiple box-type modules are combined and spliced ​​in the horizontal direction, the cast connection sections of the wall panels of multiple adjacent box-type modules can enclose a cavity extending in the up and down direction. The cavity is used as a template for cast-in-place components. By pouring concrete in the cavity, multiple adjacent box-type modules can be fixedly connected, ensuring the connection quality between multiple box-type modules. In summary, the 3D printed assembled box-type structure of the first embodiment of the present invention has a simple structure, high assembly efficiency, high connection strength between multiple box-type modules, and reduced labor costs.

[0010] According to an embodiment of the first aspect of the present invention, the casting connection section is arranged at a corner portion or a wall portion of the wall panel.

[0011] According to an embodiment of the first aspect of the present invention, it further includes an embedded connecting piece, one end of which is embedded in the casting connecting section and the other end of which extends toward the cavity.

[0012] According to a further embodiment of the first aspect of the present invention, the embedded connecting member is a steel bar, a steel mesh, an FRP bar, an FRP mesh or an FRP cloth.

[0013] According to a further embodiment of the first aspect of the present invention, the embedded connector has multiple layers in the up and down directions.

[0014] According to an embodiment of the first aspect of the present invention, the cast-in-situ component cast on site in the cavity is a cast-in-situ column or a cast-in-situ shear wall.

[0015] According to an embodiment of the first aspect of the present invention, it further comprises an external facade connection member, wherein the external facade connection member is used to be arranged on the periphery of the structure after the plurality of box-type modules are cast on-site and connected.

[0016] According to a further embodiment of the first aspect of the present invention, the facade connecting member is a steel bar, a steel mesh, an FRP bar, an FRP mesh or an FRP cloth.

[0017] According to a further embodiment of the first aspect of the present invention, the facade connection member is arranged on the structure after the plurality of box-type modules are cast and connected on site by spraying concrete.

[0018] According to an embodiment of the first aspect of the present invention, the wall panel further includes a conventional section, and when a plurality of the box-type modules are assembled in the up and down directions, the conventional sections between the box-type modules adjacent to each other in the up and down directions match.

[0019] The second aspect of the present invention also proposes a connection method for a 3D printed assembled box-type structure.

[0020] According to a connection method of a 3D printed assembled box-type structure according to an embodiment of the second aspect of the present invention, the 3D printed assembled box-type structure is a 3D printed assembled box-type structure according to any one of the embodiments of the first aspect, and the connection method comprises the following steps:

[0021] Splicing and assembling a plurality of the box-shaped modules so that the casting connection sections of the wall panels of a plurality of adjacent box-shaped modules enclose a cavity extending in the up-down direction;

[0022] Concrete is poured into the cavity to obtain a structure formed by pouring and connecting a plurality of the box-type modules on site.

[0023] According to the connection method of the 3D printed assembled box-type structure of the second embodiment of the present invention, multiple box-type modules are combined and spliced ​​in the horizontal direction, and the cast connection sections of the wall panels of multiple adjacent box-type modules can enclose a cavity extending in the up and down directions. The cavity is used as a template for cast-in-place components, and concrete is poured into the cavity. The multiple adjacent box-type modules are fixedly connected by concrete. The structure is simple, the assembly efficiency is high, the connection strength between the multiple box-type modules is high, and the labor cost is reduced.

[0024] According to an embodiment of the second aspect of the present invention, when the 3D printed assembled box-type structure includes the embedded connector according to the embodiment of the first aspect, the other end of the embedded connector is also fixedly connected to the steel cage, and the steel cage is located in the cavity.

[0025] According to a further embodiment of the second aspect of the present invention, when the 3D printed assembled box-type structure includes the facade connecting components described in the embodiment of the first aspect, an inner layer of concrete is first sprayed on the periphery of the structure after the multiple box-type modules are cast on-site and connected, and then the facade connecting components are placed on the inner layer of concrete, and then an outer layer of concrete is sprayed, and finally surface treatment is performed.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 This is a structural schematic diagram of a 3D printed assembled box-type structure according to an embodiment of the first aspect of the present invention.

[0029] Figure 2This is another structural schematic diagram of the 3D printed assembled box-type structure of the first embodiment of the present invention.

[0030] Figure 3 This is a schematic structural diagram of a box-type module of a 3D printed assembled box-type structure according to an embodiment of the first aspect of the present invention.

[0031] Figure 4 This is a schematic diagram of horizontal assembly and splicing of multiple box-type modules of a 3D printed assembled box-type structure according to an embodiment of the first aspect of the present invention.

[0032] Figure 5 This is another schematic diagram of the horizontal assembly and splicing of multiple box-type modules of the 3D printed assembled box-type structure according to the first embodiment of the present invention.

[0033] Figure 6 This is another schematic diagram of the horizontal assembly and splicing of multiple box-type modules of the 3D printed assembled box-type structure according to the first embodiment of the present invention.

[0034] Figure 7 This is a schematic structural diagram of the box-type modules, steel cage and embedded connectors of the 3D printed assembled box-type structure of the first embodiment of the present invention.

[0035] Reference numerals:

[0036] 3D printed assembled box structure 1000

[0037] Box module 1 Floor 11 Wall 12 Casting connection section 121 Conventional section 122

[0038] Cavity 2

[0039] Embedded connector 3

[0040] Steel cage 4

[0041] External facade connection components 5

[0042] Inner concrete 6

[0043] Outer concrete 7 DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] Combine the following Figures 1 to 7 The 3D printed assembled box-type structure 1000 according to the first aspect of the embodiment of the present invention is described.

[0046] like Figure 1 and Figure 7 As shown, the 3D printed assembled box-type structure 1000 according to the embodiment of the first aspect of the present invention includes a floor slab 11 and a wall panel 12; the wall panel 12 and the floor slab 11 are box-type modules 1 formed in one piece by 3D printing; a casting connection section 121 is provided on the wall panel 12; when a plurality of box-type modules 1 are combined and spliced ​​in the horizontal direction, the casting connection sections 121 of the wall panels 12 of a plurality of adjacent box-type modules 1 enclose a cavity 2 extending in the up and down directions, and the cavity 2 is used as a template for cast-in-place components for on-site casting.

[0047] Specifically, the wall panels 12 and the floor panels 11 are printed using 3D technology, with high manufacturing precision, high material utilization, low processing cost and fast processing speed; the box-type module 1 can be a standard shape, such as streamlined, mortise and tenon, square and round, and the box-type module 1 can also be a special shape to meet the actual needs; the 3D printing method can be a concrete extrusion method, a concrete contour printing method, a powder bonding method, a hot melt deposition method, a laser printing method and a fiber printing method; the printed material can be a concrete material, such as ordinary concrete material, fiber concrete material or high ductility concrete material, the printed material can also be a metal material, such as steel or aluminum, the printed material can also be a fiber material, such as glass fiber, carbon fiber or basalt fiber, and the printed material can also be a multifunctional composite material, such as a sandwich panel.

[0048] A casting connection section 121 is provided on the wall panel 12; when multiple box-type modules 1 are combined and spliced ​​in the horizontal direction, the casting connection sections 121 of the wall panels 12 of multiple adjacent box-type modules 1 enclose a cavity 2 extending in the up and down directions, and the cavity 2 serves as a cast-in-place component template for on-site casting. It can be understood that, compared with the prior art, in which the post-cast component template is made on-site and installed between multiple adjacent box modules, which makes the template installation difficult, inefficient, and has poor connection effect, the 3D printed assembled box structure 1000 of the first aspect of the present invention is provided with a casting connection section 121 on the wall panel 12 of each box module 1, so that when multiple box modules 1 are combined and spliced ​​in the horizontal direction, the casting connection sections 121 of the wall panels 12 of multiple adjacent box modules 1 can enclose a cavity 2 extending in the up and down directions, and the cavity 2 is used as a cast-in-place component template, and concrete can be poured in the cavity 2 to fix and connect multiple adjacent box modules 1, which has a simple structure, high assembly efficiency, high connection strength between multiple box modules 1 and reduced labor costs.

[0049] According to the 3D printed assembled box-type structure 1000 of the first embodiment of the invention, the wall panels 12 and the floor slabs 11 are printed using 3D technology, and a casting connection section 121 is set on the wall panels 12 of each box-type module 1, so that when multiple box-type modules 1 are combined and spliced ​​in the horizontal direction, the casting connection sections 121 of the wall panels 12 of multiple adjacent box-type modules 1 can enclose a cavity 2 extending in the up and down direction, and the cavity 2 is used as a cast-in-place component template. By pouring concrete in the cavity 2, multiple adjacent box-type modules 1 can be fixedly connected, thereby ensuring the connection quality between the multiple box-type modules 1. In summary, the 3D printed assembled box-type structure 1000 of the first embodiment of the present invention has a simple structure, high assembly efficiency, high connection strength between multiple box-type modules 1, and reduced labor costs.

[0050] According to an embodiment of the first aspect of the present invention, the casting connection section 121 is arranged at the corner or wall portion of the wall panel 12. In this way, the location of the casting connection section 121 can be determined according to actual conditions to ensure the structural strength of the 3D printed assembled box structure 1000.

[0051] According to an embodiment of the first aspect of the present invention, it also includes an embedded connector 3, one end of which is embedded in the casting connection section 121, and the other end extends to the cavity 2. Specifically, the embedded connector 3 is arranged in the casting connection section 121, and the other end of the embedded connector extends to the cavity 2 and is tied or welded with the steel cage 4 arranged on site in the cavity 2, and concrete is poured in the cavity 2 to bury the other end of the embedded connector and the steel cage 4 in the cast-in-place component. In this way, the structural internal force of the box-type module 1 can be transmitted to the cast-in-place component through the embedded connector 3, thereby improving the connection strength between multiple adjacent box-type modules 1 and the structural bearing capacity of the 3D printed assembled box-type structure 1000, and ensuring the overall strength of the structure.

[0052] According to a further embodiment of the first aspect of the present invention, the embedded connector 3 is a steel bar, a steel mesh, an FRP bar, an FRP mesh or an FRP cloth. Specifically, the type of the embedded connector 3 can be determined according to actual conditions, for example, the embedded connector 3 can be a steel bar with a hook at the other end.

[0053] like Figure 2As shown, according to a further embodiment of the first aspect of the present invention, the embedded connector 3 has multiple layers in the up-down direction. It can be understood that multiple layers of embedded connectors 3 are arranged in the up-down direction in the casting connection section 121, and the other end of the multiple embedded connectors extends to the cavity 2 and is tied or welded with the steel cage 4 arranged on site in the cavity 2, and concrete is poured in the cavity 2 to bury the other end of the multiple embedded connectors and the steel cage 4 in the cast-in-place component. In this way, the structural internal force of the box-type module 1 can be transmitted to the cast-in-place component through the multiple embedded connectors 3 in the up-down direction, further improving the connection strength between multiple adjacent box-type modules 1 and the structural bearing capacity of the 3D printed assembled box-type structure 1000, and ensuring the overall strength of the structure.

[0054] like Figures 4 to 6 As shown, according to an embodiment of the first aspect of the present invention, the cast-in-place component cast on-site in the cavity 2 is a cast-in-place column or a cast-in-place shear wall. Specifically, the cast-in-place component cast on-site in the cavity 2 can be a cast-in-place circular column, a cast-in-place square column or a cast-in-place shear wall, and the shape of the cavity 2 can be determined according to actual conditions to form cast-in-place components of different shapes.

[0055] like Figure 1 and Figure 2 As shown, according to an embodiment of the first aspect of the present invention, it also includes a facade connection member 5, which is used to be arranged on the periphery of the structure after the multiple box-type modules 1 are cast on site and connected. Specifically, the inner layer of concrete 6 is first sprayed on the periphery of the structure after the multiple box-type modules 1 are cast on site and connected, and then the facade connection member 5 is placed on the inner layer of concrete 6, and then the outer layer of concrete 7 is sprayed, and finally the surface treatment is performed to externally connect the multiple box-type modules 1, which can improve the connection strength between the multiple adjacent box-type modules 1 and the structural bearing capacity of the 3D printed assembled box-type structure 1000, ensure the overall strength of the structure, simple structure, and convenient on-site construction.

[0056] According to a further embodiment of the first aspect of the present invention, the facade connection member 5 is a steel bar, a steel mesh, an FRP bar, an FRP mesh or an FRP cloth. Specifically, the type of the facade connection member 5 can be determined according to actual conditions. For example, the facade connection member 5 can be a steel mesh. An inner layer of concrete 6 is first sprayed on the periphery of the structure after multiple box-type modules 1 are cast on site and connected, and then the steel mesh is placed on the inner layer of concrete 6, and then an outer layer of concrete 7 is sprayed, and finally surface treatment is performed to externally connect multiple box-type modules 1.

[0057] According to a further embodiment of the first aspect of the present invention, the facade connection member 5 is arranged on the structure after the multiple box-type modules 1 are cast and connected on site by spraying concrete. Specifically, the concrete can be a sprayed cement-based material, the concrete can also be a high-ductility cement-based material, such as PVA or PE fiber, and the concrete can also be a fiber cement-based material, such as PP, steel or glass fiber.

[0058] It should be noted that the spraying method of concrete can be manual application or automatic spraying by machine.

[0059] According to an embodiment of the first aspect of the present invention, the wall panel 12 further includes a conventional section 122. When a plurality of box-type modules 1 are assembled in the vertical direction, the conventional sections 122 between the vertically adjacent box-type modules 1 coincide with each other. It can be understood that by providing the conventional section 122 on the wall panel 12, the vertically adjacent box-type modules 1 can be quickly positioned and assembled, with a simple structure and high assembly efficiency.

[0060] The second aspect of the present invention also proposes a connection method for a 3D printed assembled box-type structure.

[0061] According to the connection method of the 3D printed assembled box-type structure of the second embodiment of the present invention, the 3D printed assembled box-type structure 1000 is the 3D printed assembled box-type structure 1000 according to any one of the embodiments of the first embodiment, and the connection method comprises the following steps:

[0062] The plurality of box-shaped modules 1 are spliced ​​and combined so that the cast connection sections 121 of the wall panels 12 of the plurality of adjacent box-shaped modules 1 enclose a cavity 2 extending in the up-down direction;

[0063] Concrete is poured into the cavity 2 to obtain a structure composed of multiple box-type modules 1 that are cast and connected on site.

[0064] According to the connection method of the 3D printed assembled box-type structure of the second embodiment of the present invention, multiple box-type modules 1 are combined and spliced ​​in the horizontal direction, and the cast connection sections 121 of the wall panels 12 of multiple adjacent box-type modules 1 can enclose a cavity 2 extending in the up and down directions. The cavity 2 is used as a template for cast-in-place components, and concrete is poured into the cavity 2. The multiple adjacent box-type modules 1 are fixedly connected by the concrete. The structure is simple, the assembly efficiency is high, the connection strength between the multiple box-type modules 1 is high, and the labor cost is reduced.

[0065] According to an embodiment of the second aspect of the present invention, when the 3D printed assembled box-type structure 1000 includes the embedded connector 3 according to the embodiment of the first aspect, the other end of the embedded connector 3 is also fixedly connected to the steel cage 4, and the steel cage 4 is located in the cavity 2. It can be understood that multiple layers of embedded connectors 3 are arranged in the up and down directions in the casting connection section 121, and the other ends of the multiple layers of embedded parts extend to the cavity 2 and are tied or welded with the steel cage 4 arranged on site in the cavity 2. Concrete is poured in the cavity 2 to bury the other ends of the multiple layers of embedded parts and the steel cage 4 in the cast-in-place component. In this way, the structural internal force of the box-type module 1 can be transmitted to the cast-in-place component, effectively improving the connection strength between multiple adjacent box-type modules 1 and the structural bearing capacity of the 3D printed assembled box-type structure 1000, and ensuring the overall strength of the structure.

[0066] According to a further embodiment of the second aspect of the present invention, when the 3D printed assembled box-type structure 1000 includes the facade connection member 5 according to the embodiment of the first aspect, the inner layer of concrete 6 is first sprayed on the periphery of the structure after multiple box-type modules 1 are cast and connected on site, and then the facade connection member 5 is placed on the inner layer of concrete 6, and then the outer layer of concrete 7 is sprayed, and finally the surface treatment is performed. In this way, multiple box-type modules 1 can be externally connected, the connection strength between multiple adjacent box-type modules 1 and the structural bearing capacity of the 3D printed assembled box-type structure 1000 can be improved, the overall strength of the structure is guaranteed, the structure is simple, and the on-site construction is convenient.

[0067] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A 3D printed assembled box-type structure, characterized in that: include: Floor slab; Wall panels, wherein the wall panels and the floor panels are box-shaped modules integrally formed by 3D printing; The wall panels are provided with casting connection sections; when a plurality of the box-shaped modules are assembled and spliced ​​in the horizontal direction, the casting connection sections of the wall panels of a plurality of adjacent box-shaped modules enclose a cavity extending in the vertical direction, and the cavity is used as a cast-in-place component template for on-site casting; It also includes an external facade connection component, which is used to be arranged on the periphery of the structure after the multiple box-type modules are poured and connected on site; The wall panel also includes a conventional section. When a plurality of the box-type modules are assembled in the up-down direction, the conventional sections between the box-type modules adjacent to each other in the up-down direction match.

2. The 3D printed assembled box-type structure according to claim 1, characterized in that: The casting connection section is arranged at a corner portion or a wall portion of the wall panel.

3. The 3D printed assembled box-type structure according to claim 1, characterized in that: It also includes an embedded connecting piece, one end of which is embedded in the casting connecting section and the other end extends to the cavity.

4. The 3D printed assembled box-type structure according to claim 3, characterized in that: The embedded connecting parts are steel bars, steel meshes, FRP bars, FRP meshes or FRP cloths.

5. The 3D printed assembled box-type structure according to claim 3, characterized in that: The embedded connecting piece has multiple layers in the up and down directions.

6. The 3D printed assembled box-type structure according to claim 1, characterized in that: The cast-in-place components cast on site in the cavity are cast-in-place columns or cast-in-place shear walls.

7. The 3D printed assembled box-type structure according to claim 1, characterized in that: The exterior facade connecting components are steel bars, steel meshes, FRP bars, FRP meshes or FRP cloths.

8. The 3D printed assembled box-type structure according to claim 7, characterized in that: The exterior facade connection components are arranged on the structure after the plurality of box-type modules are cast and connected on site by spraying concrete.

9. A method for connecting a 3D printed assembled box-type structure, characterized in that: The 3D printed assembled box-type structure is a 3D printed assembled box-type structure according to any one of claims 1 to 8, and the connection method comprises the following steps: Splicing and assembling a plurality of the box-shaped modules so that the casting connection sections of the wall panels of a plurality of adjacent box-shaped modules enclose a cavity extending in the up-down direction; Concrete is poured into the cavity to obtain a structure formed by pouring and connecting a plurality of the box-type modules on site.

10. The connection method of the 3D printed assembled box-type structure according to claim 9, characterized in that: When the 3D printed assembled box-type structure includes the embedded connector according to claim 3, the other end of the embedded connector is also fixedly connected to a steel cage, and the steel cage is located in the cavity.

11. The connection method of the 3D printed assembled box-type structure according to claim 9, characterized in that: When the 3D printed assembled box-type structure includes the facade connecting member according to claim 7, an inner layer of concrete is first sprayed on the periphery of the structure after the multiple box-type modules are cast on site and connected, and then the facade connecting member is placed on the inner layer of concrete, and then an outer layer of concrete is sprayed, and finally surface treatment is performed.

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