Large-space fabricated building and construction method

Abstract

The invention provides a large-space fabricated building and a construction method, relates to the technical field of fabricated buildings, and is used for solving the problems of rust prevention and fire prevention of a composite shear wall. The large-space fabricated building comprises an outer wall, the outer wall comprises an outdoor decoration layer, a plurality of first metal pipe columns, first connecting pieces, a first wave web and an outdoor decoration base layer, the outdoor decoration layer and the outdoor decoration base layer are arranged at intervals and define a first pouring cavity, and the first metal pipe columns are arranged in the first pouring cavity at intervals; every two adjacent first metal pipe columns are connected through a first wave web, the first wave webs are in a wave shape in the length direction of the outdoor decoration layer, and the outdoor decoration layer and the outdoor decoration base layer are connected with the first wave webs through first connecting pieces. And the inner wall comprises an indoor decoration layer, a plurality of second metal pipe columns, a second connecting piece, a second wave web and an indoor decoration base layer. And the outer wall and the inner wall are connected through the connecting beam. The floor slab is arranged at the upper ends of the inner wall and the outer wall.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated buildings, and in particular to a large-space prefabricated building and a construction method. Background Art

[0002] Composite shear walls have good stress-bearing performance, but when used in residential buildings, the corrosion prevention and fire prevention issues cannot meet the current situation of dispersed property rights of residential buildings, and it is difficult to achieve unified maintenance like public buildings. There is a lack of corrosion prevention and fire prevention construction methods for composite shear walls that match the usage characteristics of residential buildings. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides a large-space prefabricated building and a construction method, which are used to solve the corrosion prevention and fire prevention problems of the combined shear wall.

[0004] In a first aspect, an embodiment of the present application provides a large-space prefabricated building, comprising: an exterior wall, wherein the exterior wall comprises an outdoor decorative layer, a plurality of first metal pipe columns, a first connecting piece, a first corrugated web and an outdoor decorative base layer, wherein the outdoor decorative layer and the outdoor decorative base layer are spaced apart and enclose a first perfusion cavity, wherein a plurality of the first metal pipe columns are spaced apart in the first perfusion cavity, and two adjacent first metal pipe columns are connected by the first corrugated web, wherein the first corrugated web forms a wave shape along the length direction of the outdoor decorative layer, and the outdoor decorative layer and the outdoor decorative base layer are connected to the first corrugated web by the first connecting piece. An interior wall, the interior wall comprises an interior decoration layer, a plurality of second metal pipe columns, a second connecting member, a second corrugated web and an interior decoration base layer, the interior decoration layer and the interior decoration base layer are arranged at intervals and surround a second infusion cavity, a plurality of second metal pipe columns are arranged at intervals in the second infusion cavity, two adjacent second metal pipe columns are connected by the second corrugated web, the second corrugated web forms a wave shape along the length direction of the interior decoration layer, and the interior decoration layer and the interior decoration base layer are connected to the second corrugated web by the second connecting member. A connecting beam, the exterior wall and the interior wall are connected by the connecting beam. A floor slab, the floor slab is arranged at the upper ends of the interior wall and the exterior wall.

[0005] According to the large-space prefabricated building of the embodiment of the present application, by connecting two adjacent first metal pipe columns through the first wave web, and connecting the outdoor decorative layer and the outdoor decorative base layer with the first wave web through the first connecting piece, it is possible to eliminate the need for formwork on the construction site, and the post-poured concrete can be used as a fireproof layer, thereby eliminating the need for fire-retardant coating construction. At the same time, due to the good bonding performance between the post-poured concrete and the first metal pipe column and the first wave web, as well as the second metal pipe column and the second wave web, maintenance-free operation throughout the entire life cycle can be achieved, thereby solving the corrosion and fire prevention problems of the combined shear wall.

[0006] In one possible implementation, the connecting beam includes a connecting outdoor layer, a third corrugated web, a fourth corrugated web, a third connecting piece and a connecting indoor layer, the connecting outdoor layer and the connecting indoor layer are spaced apart and enclose a third perfusion cavity, the third corrugated web is arranged in the third perfusion cavity and connected to the connecting outdoor layer, the fourth corrugated web is arranged in the third perfusion cavity and connected to the connecting indoor layer through the third connecting piece.

[0007] In one possible implementation, the connecting beam further includes a support plate, which is connected to the bottom ends of the third wave web and the fourth wave web, and whose orthographic projection on the plane where the third perfusion cavity is located covers a portion of the bottom opening of the third perfusion cavity.

[0008] In one possible implementation, the large-space prefabricated building also includes a beam support assembly, which includes two fifth wave webs, one of which is located between the third wave web and the outer layer of the connection room, and the other fifth wave web is located between the fourth wave web and the inner layer of the connection room, and both fifth wave webs are connected to the first metal pipe column or the second metal pipe column.

[0009] In a possible implementation, in the width direction of the connecting beam, there is a spacing between the fifth corrugated web and the third corrugated web, and the spacing is greater than or equal to 30 mm and less than or equal to 60 mm.

[0010] In one possible implementation, the beam support assembly also includes a support base plate, which is arranged at the bottom end of the fifth wave web, one end of the support base plate is connected to the first metal pipe column or the second metal pipe column, and the other end is abutted against the support plate.

[0011] In a possible implementation, the first metal tube columns are provided at two opposite ends of the first perfusion cavity.

[0012] In a possible implementation manner, the first corrugated web has a first protrusion protruding toward the outdoor decorative layer, and the first connecting member is connected to a surface of the first protrusion facing the outdoor decorative layer.

[0013] In a possible implementation, the floor slab is a hollow floor slab, and ears are provided on two opposite sides of the floor slab, and the ears of two adjacent floor slabs are abutted against each other.

[0014] In the second aspect, the present application provides a construction method, which is applied to the above-mentioned large-space prefabricated building, and the construction method includes: making the exterior wall, interior wall, connecting beam and floor slab; fixing the exterior wall and the interior wall at predetermined positions, connecting the exterior wall and the interior wall through connecting beams, and installing the floor slab; pouring concrete into the first pouring cavity and the second pouring cavity.

[0015] Among them, the technical effects brought about by the second aspect can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 A schematic diagram of a large-space prefabricated building provided for some embodiments of the present application;

[0019] Figure 2 A schematic diagram of an exterior wall provided for some embodiments of the present application;

[0020] Figure 3 A schematic diagram of an interior wall provided for some embodiments of the present application;

[0021] Figure 4 A schematic diagram of a connecting beam provided for some embodiments of the present application;

[0022] Figure 5 A partial schematic diagram of a large-space prefabricated building provided for some embodiments of the present application.

[0023] Reference numerals:

[0024] 100. Large space prefabricated buildings;

[0025] 1. External wall; 11. Outdoor decorative layer; 12. First metal pipe column; 13. First connecting piece; 14. First wave web; 141. First protrusion; 15. Outdoor decorative base layer;

[0026] 2. Inner wall; 21. Indoor decoration layer; 22. Second metal pipe column; 23. Second connecting piece; 24. Second wave web; 25. Indoor decoration base layer;

[0027] 3. Tie beam; 31. Connecting outdoor layer; 32. Third wave web; 33. Fourth wave web; 34. Third connecting piece; 35. Connecting indoor layer; 36. Support plate;

[0028] 4. Floor; 41. Cantilever;

[0029] 5. Beam support assembly; 51. Fifth wave web; 52. Support bottom plate. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "front", "back", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. In addition, the directional terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only references to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0034] With the demand for variable apartment types and age-friendly housing, residential buildings are paying more and more attention to the design of large internal spaces. Traditional reinforced concrete shear walls are difficult to achieve large internal column-free spaces due to their stress limitations. Composite shear walls have good stress performance, but when applied to residential buildings, the corrosion and fire prevention issues are difficult to meet the current situation of dispersed property rights of residential buildings, and it is difficult to achieve unified maintenance like public buildings. There is a lack of corrosion and fire prevention construction methods for composite shear walls that match the use characteristics of residential buildings.

[0035] In order to solve the above technical problems, the present application provides a large-space prefabricated building and a construction method.

[0036] The large-space prefabricated building of the embodiment of the present application is described below.

[0037] See also Figure 1-Figure 3 , Figure 1 Schematic diagram of a large-space prefabricated building provided in some embodiments of the present application, Figure 2 A schematic diagram of an exterior wall provided for some embodiments of the present application, Figure 3 Schematic diagram of the inner wall provided for some embodiments of the present application. A large space prefabricated building 100 includes an outer wall 1, an inner wall 2, a connecting beam 3 and a floor slab 4.

[0038] The exterior wall 1 may include an exterior decoration layer 11 , a plurality of first metal pipe columns 12 , a first connecting member 13 , a first corrugated web 14 and an exterior decoration base layer 15 .

[0039] The outdoor decoration layer 11 and the outdoor decoration base layer 15 are arranged at intervals to enclose a first perfusion cavity. Specifically, the outdoor decoration base layer 15 is located on the side of the outdoor decoration layer 11 facing the interior, and the outdoor decoration layer 11 and the outdoor decoration base layer 15 are relatively parallel and have a spacing therebetween to enclose a first perfusion cavity.

[0040] For example, the outdoor decoration layer 11 may be made of polystyrene granular mortar, and the outdoor decoration base layer 15 may be made of self-leveling cement-based material.

[0041] A plurality of first metal pipe columns 12 are arranged at intervals in the first perfusion cavity. The first metal pipe columns 12 may be hollow pipe columns, and “plurality” means that the number of the first metal pipe columns 12 is two or more, and the first metal pipe columns 12 may be steel pipe columns.

[0042] Two adjacent first metal tube columns 12 may be connected via a first corrugated web 14. Specifically, two adjacent first metal tube columns 12 and the first corrugated web 14 may be connected via welding.

[0043] Exemplarily, the connection point between the first corrugated web 14 and the first metal tube column 12 may be located in the middle of the first metal tube column 12 , that is, the distance between the outdoor decoration layer 11 and the first corrugated web 14 is equal to the distance between the outdoor decoration base layer 15 and the first corrugated web 14 .

[0044] The first wave web 14 forms a wave shape along the length direction of the outdoor decoration layer 11. The outdoor decoration layer 11 and the outdoor decoration base layer 15 are connected to the first wave web 14 through the first connecting piece 13. Specifically, the first connecting piece 13 is provided on both opposite sides of the first wave web 14, the first connecting piece 13 on one side is connected to the outdoor decoration layer 11, and the first connecting piece 13 on the other side is connected to the outdoor decoration base layer 15. Thus, concrete can be poured into the first pouring cavity, and the construction site can be free of formwork. Then, the post-cast concrete can be used as the fireproof layer of the first metal pipe column 12 and the first wave web 14, so there is no need to carry out the construction of fireproof coating. At the same time, due to the good bonding performance of the post-cast concrete with the first metal pipe column 12 and the first wave web 14, maintenance-free throughout the life cycle can be achieved.

[0045] The interior wall 2 may include an interior decoration layer 21 , a plurality of second metal pipe columns 22 , a second connecting member 23 , a second corrugated web 24 and an interior decoration base layer 25 .

[0046] The interior decoration layer 21 and the interior decoration base layer 25 are arranged at intervals to enclose a second perfusion cavity. Specifically, the interior decoration base layer 25 is located on the side of the interior decoration layer 21 facing the interior, and the interior decoration layer 21 and the interior decoration base layer 25 are relatively parallel and have a spacing therebetween to enclose a second perfusion cavity.

[0047] Exemplarily, the interior decoration base layer 25 may be made of a self-leveling cement-based material.

[0048] A plurality of second metal pipe columns 22 are arranged at intervals in the second perfusion cavity. The second metal pipe columns 22 may be hollow pipe columns, and “plurality” means that the number of the second metal pipe columns 22 is two or more, and the second metal pipe columns 22 may be steel pipe columns.

[0049] Two adjacent second metal tube columns 22 may be connected via a second corrugated web 24. Specifically, two adjacent second metal tube columns 22 and the second corrugated web 24 may be connected via welding.

[0050] Exemplarily, the connection point between the second corrugated web 24 and the second metal tube column 22 may be located in the middle of the first metal tube column 12 , that is, the distance between the interior decoration layer 21 and the second corrugated web 24 is equal to the distance between the exterior decoration base layer 15 and the second corrugated web 24 .

[0051] The second wave web 24 forms a wave shape along the length direction of the interior decoration layer 21. The interior decoration layer 21 and the interior decoration base layer 25 are connected to the second wave web 24 through the second connecting piece 23. Specifically, the second connecting piece 23 is provided on the opposite sides of the second wave web 24, the second connecting piece 23 on one side is connected to the interior decoration layer 21, and the second connecting piece 23 on the other side is connected to the interior decoration base layer 25. In this way, concrete can be poured into the second pouring cavity, and the construction site can be free of formwork. The post-cast concrete can be used as the fireproof layer of the second metal pipe column 22 and the second wave web 24, so there is no need to carry out the construction of fire-retardant coating. At the same time, due to the good bonding performance of the post-cast concrete with the second metal pipe column 22 and the second wave web 24, maintenance-free throughout the life cycle can be achieved.

[0052] The outer wall 1 and the inner wall 2 are connected by a connecting beam 3. Specifically, there may be multiple outer walls 1, and the outer walls 1 and the outer walls 1 may be connected by a connecting beam 3. There may also be multiple inner walls 2, and the inner walls 2 and the inner walls 2 may be connected by a connecting beam 3.

[0053] The floor slab 4 may be disposed at the upper ends of the inner wall 2 and the outer wall 1. Specifically, the number of the floor slab 4 may be multiple, and the multiple floor slabs 4 are sequentially connected at the upper ends of the inner wall 2 and the outer wall 1.

[0054] According to the large-space prefabricated building 100 of the embodiment of the present application, by connecting two adjacent first metal pipe columns 12 through the first wave web 14, and connecting the outdoor decorative layer 11 and the outdoor decorative base layer 15 to the first wave web 14 through the first connecting member 13, it is possible to achieve formwork-free construction on the construction site, and the post-poured concrete can be used as a fireproof layer, thereby eliminating the need for fire-retardant coating construction. At the same time, due to the good bonding performance between the post-poured concrete and the first metal pipe column 12 and the first wave web 14, as well as the second metal pipe column 22 and the second wave web 24, maintenance-free construction can be achieved throughout the life cycle, thereby solving the corrosion and fire prevention problems of the combined shear wall.

[0055] Please continue reading Figure 1-Figure 3In some embodiments, the first corrugated web 14 may have a first protrusion 141 protruding toward the outdoor decoration layer 11. The first connecting member 13 is connected to the surface of the first protrusion 141 facing the outdoor decoration layer 11. Thus, the connection strength between the first connecting member 13 and the first corrugated web 14 can be ensured, which is beneficial to improving the overall structural strength of the exterior wall 1.

[0056] It should be noted that the second corrugated web 24 may have a second protrusion protruding toward the interior decoration layer 21. The second connecting member 23 is connected to the surface of the second protrusion facing the exterior decoration layer 11.

[0057] Please continue reading Figure 1-Figure 3 In some embodiments, the floor 4 may be a hollow floor 4. Lugs 41 are provided on opposite sides of the floor 4, and the lugs 41 of two adjacent floor slabs 4 abut against each other. Thus, the floor slab 4 can be directly prefabricated, and the floor slab 4 can be constructed without formwork or support at the construction site, which is beneficial to improving construction efficiency, and can also realize the design of a large internal space without columns.

[0058] See also Figure 4 , Figure 4 Schematic diagram of a connecting beam provided in some embodiments of the present application. The connecting beam 3 may include a connecting outdoor layer 31, a third wave web 32, a fourth wave web 33, a third connecting member 34 and a connecting indoor layer 35. The connecting outdoor layer 31 and the connecting indoor layer 35 are spaced apart and enclose a third pouring cavity, which can be used for pouring concrete.

[0059] The third corrugated web 32 is disposed in the third perfusion cavity and connected to the outer layer 31 of the connection chamber, and the fourth corrugated web 33 is disposed in the third perfusion cavity and connected to the inner layer 35 of the connection chamber through the third connecting member 34. Specifically, the third corrugated web 32 and the fourth corrugated web 33 are disposed at intervals in the third perfusion cavity, the third corrugated web 32 can be connected to the outer layer 31 of the connection chamber through a fastener, and the fourth corrugated web 33 can be connected to the inner layer 35 of the connection chamber through the third connecting member 34.

[0060] Therefore, the concrete poured into the third pouring cavity can be used as a fireproof layer, so there is no need to apply fireproof coating. At the same time, the post-cast concrete has good bonding performance with the third wave web 32 and the fourth wave web 33, so that maintenance-free operation can be achieved throughout the life cycle.

[0061] It should be noted that the third wave web 32 and the fourth wave web 33 may be formed in a wave shape along the length direction of the connecting outdoor outer layer 31 .

[0062] Please continue reading Figure 4In some embodiments, the connecting beam 3 may further include a support plate 36. The support plate 36 is connected to the bottom ends of the third wave web 32 and the fourth wave web 33, and its orthographic projection on the plane where the third pouring cavity is located covers the portion of the bottom opening of the third pouring cavity. Specifically, the support plate 36 is disposed at the bottom ends of the third wave web 32 and the fourth wave web 33, and may be connected to the third wave web 32 and the fourth wave web 33 by welding. Thus, cement may be directly poured into the third pouring cavity, which is beneficial to improving the convenience of construction, and further beneficial to improving the construction efficiency.

[0063] See also Figure 2 , Figure 3 and Figure 5 , Figure 5 A partial schematic diagram of a large-space prefabricated building provided for some embodiments of the present application. In some embodiments, the large-space prefabricated building 100 may further include a beam support assembly 5. The beam support assembly 5 may include two fifth wave webs 51. One fifth wave web 51 is located between the third wave web 32 and the connection outdoor layer 31, and the other fifth wave web 51 is located between the fourth wave web 33 and the connection indoor layer 35. Both fifth wave webs 51 are connected to the first metal pipe column 12 or the second metal pipe column 22. Specifically, there is a gap between the fifth wave web 51 and the third wave web 32 and the connection outdoor layer 31, and there is also a gap between the fifth wave web 51 and the fourth wave web 33 and the connection indoor layer 35. Thus, high-strength grouting material can be filled in the gap between the fifth wave web 51 and the third wave web 32 and the connecting outdoor layer 31, as well as the gap between the fifth wave web 51 and the fourth wave web 33 and the connecting indoor layer 35, and the beam support assembly 5 and the connecting beam 3 are connected by the high-strength grouting material, thereby eliminating the need for welding construction at the construction site, thereby helping to improve construction efficiency.

[0064] Please continue reading Figure 5 In some embodiments, in the width direction of the connecting beam 3, there is a spacing between the fifth wave web 51 and the third wave web 32, and the spacing is greater than or equal to 30 mm and less than or equal to 60 mm. Exemplarily, the spacing between the fifth wave web 51 and the third wave web 32 can be 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm or 60 mm, etc.

[0065] Thus, the connection strength between the fifth wave web 51 and the third wave web 32 can be ensured, which is beneficial to improving the safety and reliability of the large-space prefabricated building 100.

[0066] It should be noted that there may also be a spacing between the fifth wave web 51 and the fourth wave web 33 , and the spacing is greater than or equal to 30 mm and less than or equal to 60 mm.

[0067] Please continue reading Figure 5 In some embodiments, the beam support assembly 5 may further include a support bottom plate 52. The support bottom plate 52 is disposed at the bottom end of the fifth wave web 51. One end of the support bottom plate 52 is connected to the first metal pipe column 12 or the second metal pipe column 22, and the other end is abutted against the support plate 36. The support bottom plate 52 is flush with the support plate 36. Thus, it is convenient to directly pour concrete, thereby facilitating the convenience of construction and further facilitating the improvement of construction efficiency.

[0068] Please continue reading Figure 5 In some embodiments, first metal pipe columns 12 may be provided at opposite ends of the first perfusion cavity. This arrangement facilitates the connection of the fifth web and also ensures the overall structural strength of the exterior wall 1.

[0069] It should be noted that second metal tube columns 22 may also be provided at two opposite ends of the second perfusion cavity.

[0070] The construction method of the embodiment of the present application is described below.

[0071] The construction method of the embodiment of the present application comprises the following steps:

[0072] S1: manufacturing an outer wall 1, an inner wall 2, a connecting beam 3 and a floor slab 4. The outer wall 1, the inner wall 2, the connecting beam 3 and the floor slab 4 may be prefabricated in a factory.

[0073] S2: Fix the outer wall 1 and the inner wall 2 at predetermined positions, connect the outer wall 1 and the inner wall 2 through the connecting beam 3, and install the floor slab 4.

[0074] S3: Pour concrete into the first pouring cavity and the second pouring cavity. At the same time, concrete can be poured into the third pouring cavity, and concrete can be poured into the superimposed layer of the floor slab 4, so that the outer wall 1, the inner wall 2, the connecting beam 3 and the floor slab 4 can form a whole.

[0075] In this way, maintenance-free operation can be achieved throughout the entire life cycle, thereby solving the corrosion and fire prevention problems of the combined shear wall.

[0076] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large-space prefabricated building, characterized in that: The large-space prefabricated building includes: An exterior wall, the exterior wall comprising an outdoor decorative layer, a plurality of first metal tube columns, a first connecting piece, a first corrugated web and an outdoor decorative base layer, the outdoor decorative layer and the outdoor decorative base layer are arranged at intervals and surround a first perfusion cavity, a plurality of the first metal tube columns are arranged at intervals in the first perfusion cavity, two adjacent first metal tube columns are connected by the first corrugated web, the first corrugated web forms a wave shape along the length direction of the outdoor decorative layer, and the outdoor decorative layer and the outdoor decorative base layer are connected to the first corrugated web by the first connecting piece; An interior wall, the interior wall comprising an interior decoration layer, a plurality of second metal tube columns, a second connecting piece, a second corrugated web and an interior decoration base layer, the interior decoration layer and the interior decoration base layer are arranged at intervals and surround a second perfusion cavity, a plurality of the second metal tube columns are arranged at intervals in the second perfusion cavity, two adjacent second metal tube columns are connected by the second corrugated web, the second corrugated web forms a wave shape along the length direction of the interior decoration layer, and the interior decoration layer and the interior decoration base layer are connected to the second corrugated web by the second connecting piece; A connecting beam, the outer wall and the inner wall are connected by the connecting beam; A floor slab is arranged at the upper ends of the inner wall and the outer wall.

2. The large-space prefabricated building according to claim 1, characterized in that: The connecting beam includes a connecting outdoor layer, a third corrugated web, a fourth corrugated web, a third connecting piece and a connecting indoor layer. The connecting outdoor layer and the connecting indoor layer are spaced apart and enclose a third perfusion cavity. The third corrugated web is arranged in the third perfusion cavity and connected to the connecting outdoor layer. The fourth corrugated web is arranged in the third perfusion cavity and connected to the connecting indoor layer through the third connecting piece.

3. The large-space prefabricated building according to claim 2 is characterized in that: The connecting beam further includes a support plate, which is connected to the bottom ends of the third wave web and the fourth wave web, and whose orthographic projection on the plane where the third perfusion cavity is located covers a portion of the bottom opening of the third perfusion cavity.

4. The large-space prefabricated building according to claim 3 is characterized in that: The large-space prefabricated building also includes a beam support assembly, which includes two fifth wave webs, one of which is located between the third wave web and the outdoor layer of the connection room, and the other fifth wave web is located between the fourth wave web and the indoor layer of the connection room, and both fifth wave webs are connected to the first metal pipe column or the second metal pipe column.

5. The large-space prefabricated building according to claim 4 is characterized in that: In the width direction of the connecting beam, there is a spacing between the fifth corrugated web and the third corrugated web, and the spacing is greater than or equal to 30 mm and less than or equal to 60 mm.

6. The large-space prefabricated building according to claim 4 or 5, characterized in that: The beam support assembly also includes a support bottom plate, which is arranged at the bottom end of the fifth wave web, one end of the support bottom plate is connected to the first metal pipe column or the second metal pipe column, and the other end is abutted against the support plate.

7. The large-space prefabricated building according to claim 4, characterized in that: The first metal tube columns are arranged at two opposite ends of the first perfusion cavity.

8. The large-space prefabricated building according to claim 1, characterized in that: The first corrugated web has a first protrusion protruding toward the outdoor decorative layer, and the first connecting member is connected to a surface of the first protrusion facing the outdoor decorative layer.

9. The large-space prefabricated building according to claim 1, characterized in that: The floor slab is a hollow floor slab, and two opposite sides of the floor slab are provided with cantilever ears, and the cantilever ears of two adjacent floor slabs are in contact with each other.

10. A construction method, applied to the large-space prefabricated building according to any one of claims 1 to 9, characterized in that: The construction method comprises: Producing the exterior walls, interior walls, tie beams and floor slabs; Fixing the outer wall and the inner wall at predetermined positions, connecting the outer wall and the inner wall via a tie beam, and installing the floor slab; Concrete is poured into the first pouring cavity and the second pouring cavity.

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