Basic unit body and building structure decoration integrated unit type roof system

Abstract

The invention provides a unit type roof system integrating basic unit bodies and building structure decoration. Each basic unit body comprises two supporting columns, each supporting column comprises a column pier on the lower section, a prefabricated steel structure column on the middle section and a steel truss on the upper section, and the two supporting columns are connected through the steel trusses. The two outward extending parts are arranged on the two supporting columns correspondingly, and the outward extending parts are located at the connecting positions of the steel structure columns and the steel truss; and the decorative suspended ceiling is connected with the two outward extending parts and the steel truss. The modular advantage of a unit type roof is exerted, heat preservation and insulation, lighting and sun shading, natural ventilation and integrated utilization of photovoltaic renewable energy sources and a building are combined, the comprehensive performance of the roof is comprehensively improved, the comfort of the internal space is improved, building energy consumption and carbon emission are reduced, and improvement of the overall quality of the building is assisted; and the application of a green low-carbon emission reduction technology in the unit type roof is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of building engineering, and in particular to a unitized roof system integrating a basic unit body and building structure decoration used in the design of a large-scale station building. Background Art

[0002] Since there is basically no relevant research on unitized station (station, house) roofs in China, unitized roofs are rarely used in large station design. The only extra-large station in China that uses unitized roofs is Taiyuan South Station. With the diversified development of integrated hub design, unitized roofs have obvious advantages in structural design standard transformation and unit assembly. At the same time, they can be combined with green and digital technologies for detailed research. Unitized roofs have many intersections due to the large number of individual units. The unitized structure has restrictions on drainage methods. It is necessary to simplify the intersection nodes and quantity, simplify drainage, and improve the reliability of drainage. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a unitized roof system integrating a basic unit body and a building structure decoration, which can give full play to the modular advantages of the unitized roof, combine thermal insulation, lighting and shading, natural ventilation, and integrated utilization of photovoltaic renewable energy and buildings, and comprehensively improve the comprehensive performance of the roof.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a basic unit body, which is applied to a unitized roof system with integrated building structure decoration; the basic unit body includes: two supporting columns, each of which includes: a column pier in the lower section, a prefabricated steel structure column in the middle section and a steel truss in the upper section, and the two supporting columns are connected by the steel truss; two outward extension parts are respectively arranged on the two supporting columns, and the outward extension parts are located at the connection between the steel structure column and the steel truss; a decorative ceiling is respectively connected to the two outward extension parts and the steel truss.

[0005] In some embodiments, the basic unit body includes: a first basic unit, the first basic unit includes the two supporting columns, the two outward extension parts and the decorative ceiling, the decorative ceiling of the first basic unit includes: a perforated plate ceiling, respectively connected to the two outward extension parts; an upright lock-edge metal roof panel, arranged on the side of the perforated plate ceiling away from the steel structure column and connected to the steel truss; a photovoltaic panel, arranged on the side of the upright lock-edge metal roof panel away from the perforated plate ceiling.

[0006] In some embodiments, the basic unit body includes: a second basic unit, the second basic unit includes the two supporting columns, the two outward extension parts and the decorative ceiling, the decorative ceiling of the second basic unit includes: a perforated plate ceiling, respectively connected to the two outward extension parts; an upright lock-edge metal roof panel, arranged on the side of the perforated plate ceiling away from the steel structure column and connected to the steel truss; a crescent-shaped skylight, opened in a local area of ​​the upright lock-edge metal roof panel, and a double-layer ETFE film is provided on the side of the crescent-shaped skylight facing the steel structure column; a photovoltaic panel, arranged on the side of the upright lock-edge metal roof panel away from the perforated plate ceiling.

[0007] In some embodiments, the basic unit body includes: a third basic unit, the third basic unit includes the two supporting columns, the two extended parts and the decorative ceiling, the decorative ceiling of the third basic unit includes: a solid beam, respectively connected to the two extended parts; a glass skylight roof, arranged on the side of the solid beam away from the steel structure column, and connected to the steel truss.

[0008] To achieve the above objectives, an embodiment of the present invention further provides a unitized roof system with integrated building structure decoration, comprising: at least one of the first basic unit described in the present invention, the second basic unit described in the present invention, and the third basic unit described in the present invention.

[0009] In the above technical scheme, a large number of structural components are exposed as architectural expression elements, and de-decoration and weak decoration are achieved through the integrated design of the building structure, which improves the architectural space effect; the research and adoption of efficient structural systems saves building materials, reduces construction difficulty, achieves better economy, and reduces building energy consumption and carbon emissions. The unit assembly design of the roof has a positive significance for improving the progress of roof construction, reducing construction time, reducing powder layer and PM2.5 emissions; the industrial chain leads to the improvement of the overall design and construction quality and efficiency. Give full play to the modular advantages of the unit roof, combine thermal insulation, lighting and shading, natural ventilation, and photovoltaic renewable energy with the integrated use of buildings, comprehensively improve the comprehensive performance of the roof, improve the comfort of the internal space, reduce building energy consumption and carbon emissions, help improve the overall quality of the building, and realize the application of green and low-carbon emission reduction technology in the unit roof. It can realize the integrated expression of the building structure, adapt to the diversity and permeability of the building effect, and the production and installation technology of each component is safe, reliable and adaptable. According to actual design requirements, the unit roof system with integrated building structure decoration described in the present invention can be freely combined and matched by any number and type of three basic units. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A three-dimensional schematic diagram of a unitized roof system with integrated building structure and decoration provided by one embodiment of the present invention;

[0012] Figure 2 for Figure 1 A schematic top view of a unitized roof system with integrated building structure and decoration is shown;

[0013] Figure 3 for Figure 1 A bottom-up schematic diagram of a unitized roof system with integrated building structure and decoration is shown;

[0014] Figure 4 A schematic diagram of a steel structure column provided in one embodiment of the present invention;

[0015] Figure 5 A schematic diagram of the connection between a steel structure column and a column pier provided in one embodiment of the present invention;

[0016] Figure 6 A schematic diagram of a first basic unit provided in one embodiment of the present invention;

[0017] Figure 7 A schematic diagram of a second basic unit provided by an embodiment of the present invention;

[0018] Figure 8 A schematic diagram of a third basic unit provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] An embodiment of the present invention provides a basic unit body, which is applied to a unitized roof system with integrated building structure decoration; the basic unit body includes: two supporting columns, each of which includes: a column pier in the lower section, a prefabricated steel structure column in the middle section and a steel truss in the upper section, and the two supporting columns are connected by the steel truss; two extended parts are respectively arranged on the two supporting columns, and the extended parts are located at the connection between the steel structure column and the steel truss; a decorative ceiling is respectively connected to the two extended parts and the steel truss.

[0021] The basic unit body may include different basic units, each of which may have the same supporting columns and outward extensions, but may differ in the decorative ceilings; different decorative ceilings may respectively realize different functions such as roof combined with mechatronics (first basic unit), lighting and ventilation (second basic unit), lighting and heat insulation (third basic unit), etc.

[0022] An embodiment of the present invention provides a unitized roof system with integrated building structure decoration, including at least one of the first basic unit, the second basic unit, and the third basic unit in the basic unit body described in the present invention. According to actual design requirements, the unitized roof system with integrated building structure decoration described in the present invention can be freely combined and matched with any number and type of the above three basic units. For example, a unitized roof system with 1 or more basic units can be formed by any one of the above three basic units, a unitized roof system with 2 or more basic units can be formed by any two of the above three basic units, or a unitized roof system with 3 or more basic units can be formed by the above three basic units.

[0023] Please also read Figures 1 to 8 ,in, Figure 1 A three-dimensional schematic diagram of a unitized roof system with integrated building structure and decoration provided by one embodiment of the present invention; Figure 2 for Figure 1 A schematic top view of a unitized roof system with integrated building structure and decoration is shown; Figure 3 for Figure 1 A bottom-up schematic diagram of a unitized roof system with integrated building structure and decoration is shown; Figure 4 A schematic diagram of a steel structure column provided in one embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the connection between a steel structure column and a column pier provided in one embodiment of the present invention; Figure 6 A schematic diagram of a first basic unit provided in one embodiment of the present invention; Figure 7 A schematic diagram of a second basic unit provided by an embodiment of the present invention; Figure 8A schematic diagram of a third basic unit provided in accordance with an embodiment of the present invention.

[0025] like Figure 1 to Figure 3 As shown, the unitized roof system with integrated building structure decoration described in this embodiment includes: a first basic unit 60, two second basic units 70 and a third basic unit 80. The first basic unit 60 is arranged opposite to the third basic unit 80, and the two second basic units 70 are arranged opposite to each other; the first basic unit 60 is adjacent to the two second basic units 70 respectively, and the third basic unit 80 is adjacent to the two second basic units 70 respectively; the first basic unit 60, the two second basic units 70 and the third basic unit 80 share a steel structure column located in the middle. Specifically, the third basic unit 80 can be located in the central axis space of the station building.

[0026] The unitized roof system with integrated building structure and decoration described in this embodiment is a unitized roof system with 4 basic units composed of the above three basic units, and realizes the functions of roof integration, lighting and ventilation, lighting and heat insulation, etc. The assembled design of the roof unit has a positive significance for improving the progress of roof construction, reducing construction time, reducing powder layer and PM2.5 emissions; the industrial chain leads to the improvement of overall design and construction quality and efficiency. Taking advantage of the modularity of the unitized roof, combined with thermal insulation, lighting and shading, natural ventilation, and integrated use of photovoltaic renewable energy and buildings, the comprehensive performance of the roof is comprehensively improved, the comfort of the internal space is improved, the building energy consumption and carbon emissions are reduced, the overall quality of the building is improved, and the application of green and low-carbon emission reduction technologies in unitized roofs is realized.

[0027] Specifically, the basic unit body includes: two supporting columns 10, two extension parts 20 and a decorative ceiling 30. Each supporting column 10 includes: a column pier 11 at the lower section, a prefabricated steel structure column 12 at the middle section and a steel truss 13 at the upper section, and the two supporting columns are connected by the steel truss 13. The two extension parts 20 are respectively arranged on the two supporting columns 10, and the extension parts 20 are located at the connection between the steel structure column 12 and the steel truss 13. The decorative ceiling 30 is connected to the two extension parts 20 and the steel truss 13 respectively.

[0028] In some embodiments, the span between the steel structure columns 12 of the two support columns 10 is 40 meters to 50 meters. For example, to adapt to the module of the railway platform, the span of the waiting hall column can be selected to be 44 meters to provide an economical and reasonable span structure.

[0029] In this embodiment, the connection between the steel trusses 13 of the two supporting columns 10 forms a corner steel beam structure, and the angle can be 90 degrees.

[0030] In this embodiment, the steel structure column 12 and the corner steel beam structure are exposed. The de-decoration and weak-decoration design of this embodiment has good economic efficiency. A large number of structural components are exposed as architectural expression elements, and de-decoration and weak-decoration are achieved through the integrated design of the building structure, which improves the architectural space effect; the research and adoption of efficient structural systems saves building materials, reduces construction difficulty, achieves better economy, and reduces building energy consumption and carbon emissions.

[0031] In this embodiment, the column 11 is a cast-in-place concrete column with a support embedded part 110 (such as Figure 5 Specifically, the column pier 11 can be formed by pre-setting steel frame embedded parts and support embedded parts at the construction site and pouring concrete on site. The steel structure column 12 includes a prefabricated steel column body 121 and a ball joint support 122 (as shown in FIG. Figure 4 As shown, Figure 4 Part (a) is a stereogram. Figure 4 Part (b) is the main view), the bottom of the steel column body 121 is welded to the top of the ball joint support 122, and the bottom of the ball joint support 122 is welded to the support embedded part 110 in the column pier 11 (as shown in FIG. Figure 5 As shown). The steel truss 13 is welded and connected to the top of the steel column body 121 or is integrally formed. Specifically, the concrete column pier is cast on site, and the embedded parts of the support and the embedded parts of the steel frame in the column pier are embedded in the concrete, which requires little work and is easy to operate. The steel column body 121 of the steel structure column 12 is prefabricated and assembled in the factory, and the bottom of the steel column body 121 is welded to the top of the ball joint support 122 in the factory; the structural components processed in the factory are conducive to improving the processing quality, ensuring the appearance requirements of the exposed steel structure column, and reducing the construction period and difficulty of the site. The bottom of the ball joint support 122 is welded to the embedded parts 110 of the support in the pier 11 during on-site construction, and the on-site welding workload is small and the operation is simple. Compared with the traditional cast-in-place reinforced concrete supporting column, the supporting column provided in this embodiment has a small workload for on-site construction (casting, welding) and is easy to operate. The processing of the steel structure column in the factory is conducive to improving the processing quality, ensuring the appearance requirements of the exposed steel structure column, and reducing the construction period and difficulty of the site. With the adoption of prefabricated design, prefabricated buildings have obvious advantages in terms of construction period, labor and energy consumption, and can realize the integrated expression of building structure, adapt to the diversity of building effects, and the production and installation technology of each component is safe, reliable and adaptable. Compared with traditional cast-in-place reinforced concrete supporting columns, prefabricated buildings can reduce carbon emissions by a total of 3.737kg / m2 in the three stages of production, transportation and construction, and reduce carbon emissions by a total of 15.7%.

[0032] In this embodiment, the diameter of the steel column body 121 of the steel structure column 12 gradually increases from the bottom to the top, so as to provide a sufficient supporting surface for the steel truss 13 at the top.

[0033] like Figure 6 As shown, Figure 6 Part (a) is a bottom-up stereogram. Figure 6 Part (b) is a top view. The basic unit body includes: a first basic unit 60. The first basic unit 60 includes two supporting columns 10, two extension parts 20 and a decorative ceiling 30. Each of the supporting columns 10 includes: a column pier 11 in the lower section, a prefabricated steel structure column 12 in the middle section and a steel truss 13 in the upper section, and the two supporting columns are connected by the steel truss 13. The two extension parts 20 are respectively arranged on the two supporting columns 10, and the extension parts 20 are located at the connection between the steel structure column 12 and the steel truss 13. The decorative ceiling 30 is respectively connected to the two extension parts 20 and the steel truss 13. The decorative ceiling 30 of the first basic unit 60 includes: a perforated plate ceiling 631, a vertical lock-edge metal roof panel 632 and a photovoltaic panel 633.

[0034] Specifically, the perforated plate ceiling 631 of the first basic unit 60 is respectively connected to the two extension parts 20. The upright lock seam metal roof panel 632 is arranged on the side of the perforated plate ceiling 631 away from the steel structure column 12, and is connected to the steel truss 13. The photovoltaic panel 633 is arranged on the side of the upright lock seam metal roof panel 632 away from the perforated plate ceiling 631.

[0035] In some embodiments, the perforated plate ceiling 631 adopts an aluminum alloy perforated plate ceiling; the vertical lock seam metal roof panel 632 adopts an aluminum-magnesium-manganese metal vertical lock seam roof panel; and the photovoltaic panel 633 adopts a monocrystalline silicon photovoltaic panel or a BIPV thin-film photovoltaic panel. The aluminum-magnesium-manganese metal vertical lock seam roof panel is a roof panel used in construction. Its core is a special plate-shaped metal plate with a vertical lock seam bite design. The roof has no perforations, and the support is hidden under the panel. The plate is connected by an aluminum alloy fixed support, and the vertical lock seam bite forms a close connection, which can solve the problem of thermal expansion and contraction stress, and is suitable for making super-long size plates without deformation. Installing BIPV thin-film photovoltaics in the vertical lock seam roof panel area can reduce carbon emissions by about 40%. BIPV technology, namely Building Integrated Photovoltaic, is a technology that designs, constructs and installs solar photovoltaic power generation systems and buildings at the same time. Compared with traditional building-attached photovoltaic systems (BAPV), BIPV can not only provide clean energy, but also perfectly integrate with architectural aesthetics and functions to achieve harmonious symbiosis between architecture and energy.

[0036] In the entire unitized roof system, the first basic unit 60 is the main component of the station building, which adopts a standard unit with integrated beams and columns of 44*44 meters, reflecting the concept of integrated building structure without decoration. The roof is equipped with photovoltaic panels in combination with the mechatronics design concept to realize the integrated utilization of photovoltaic renewable energy power generation and building, comprehensively improve the comprehensive performance of the roof, improve the comfort of the internal space, reduce the building's energy consumption and carbon emissions, and help improve the overall quality of the building.

[0037] like Figure 7 As shown, Figure 7 Part (a) is a bottom-up stereogram. Figure 7 Part (b) is a top view. The basic unit body includes: a second basic unit 70. The second basic unit 70 includes two supporting columns 10, two extension parts 20 and a decorative ceiling 30. Each of the supporting columns 10 includes: a column pier 11 at the lower section, a prefabricated steel structure column 12 in the middle section and a steel truss 13 at the upper section, and the two supporting columns are connected by the steel truss 13. The two extension parts 20 are respectively arranged on the two supporting columns 10, and the extension parts 20 are located at the connection between the steel structure column 12 and the steel truss 13. The decorative ceiling 30 is respectively connected to the two extension parts 20 and the steel truss 13. The decorative ceiling 30 of the second basic unit 70 includes: a perforated plate ceiling 731, a vertical lock-edge metal roof panel 732, a crescent-shaped skylight 734 and a photovoltaic panel 733.

[0038] That is, the second basic unit 70 and the first basic unit 60 may have the same supporting columns and outward extensions, but differ in the decorative ceiling.

[0039] Specifically, the perforated plate ceiling 731 of the second basic unit 70 is respectively connected to the two extension parts 20. The upright lock-edge metal roof panel 732 is arranged on the side of the perforated plate ceiling 731 away from the steel structure column 12, and is connected to the steel truss 13. The crescent-shaped skylight 734 is opened in a local area of ​​the upright lock-edge metal roof panel 732, and a double-layer ETFE film 735 is arranged on the side of the crescent-shaped skylight 734 facing the steel structure column 12 to achieve sunshade and noise reduction. The photovoltaic panel 733 is arranged on the side of the upright lock-edge metal roof panel 732 away from the perforated plate ceiling 731. The photovoltaic panel 733 can also be arranged on the side of the crescent-shaped skylight 734 away from the perforated plate ceiling 731.

[0040] In some embodiments, the perforated plate ceiling 731 is made of aluminum alloy perforated plate ceiling; the upright lock-edge metal roof panel 732 is made of aluminum-magnesium-manganese metal upright lock-edge roof panel; the photovoltaic panel 733 is made of monocrystalline silicon photovoltaic panel or BIPV thin-film photovoltaic.

[0041] In the entire unitized roof system, the second basic unit 70 is the lighting and ventilation unit of the station building. On the basis of the first basic unit 60, a crescent-shaped skylight is partially added. A double-layer ETFE film is used under the skylight to meet the needs of indoor space convection ventilation of the station building while providing sunshade and noise reduction, giving full play to the modular advantages of the unitized roof to achieve lighting, sunshade and natural ventilation. Furthermore, on the basis of the first basic unit 60, fans with opening on both sides can be partially added to improve indoor space convection ventilation of the station building.

[0042] like Figure 8 As shown, Figure 8 Part (a) is a bottom-up stereogram. Figure 8 Part (b) is a top view. The basic unit body includes: a third basic unit 80. The third basic unit 80 includes two supporting columns 10, two extension parts 20 and a decorative ceiling 30. Each of the supporting columns 10 includes: a column pier 11 in the lower section, a prefabricated steel structure column 12 in the middle section and a steel truss 13 in the upper section, and the two supporting columns are connected by the steel truss 13. The two extension parts 20 are respectively arranged on the two supporting columns 10, and the extension parts 20 are located at the connection between the steel structure column 12 and the steel truss 13. The decorative ceiling 30 is respectively connected to the two extension parts 20 and the steel truss 13. The decorative ceiling 30 of the third basic unit 80 includes: a solid beam 831 and a glass lighting roof 832.

[0043] Specifically, the solid beam 831 of the third basic unit 80 is respectively connected to the two outward extensions 20 . The glass lighting roof 832 is disposed on a side of the solid beam 831 away from the steel structure column 12 and is connected to the steel truss 13 .

[0044] In some embodiments, the solid beam 831 is a steel structure solid beam; the glass lighting roof 832 is a colored glaze laminated Low-E double-layer hollow glass roof.

[0045] In the entire unitized roof system, the third basic unit 80 is a station building lighting unit, which is applied to the central axis space of the station building to meet the indoor lighting and heat insulation requirements, give full play to the modular advantages of the unitized roof, and achieve thermal insulation, heat insulation, and lighting.

[0046] According to the above embodiments, it can be seen that the unitized roof system with integrated building structure and decoration provided in this embodiment has a large number of structural components exposed as architectural expression elements, and realizes de-decoration and weak decoration through the integrated design of building structure, thereby improving the architectural space effect; the research and adoption of efficient structural systems saves building materials, reduces construction difficulty, achieves better economy, and reduces building energy consumption and carbon emissions. The unit assembly design of the roof has a positive significance for improving the progress of roof construction, reducing construction time, reducing powder layer and PM2.5 emissions; the industrial chain leads to the improvement of overall design and construction quality and efficiency. The concept of environmental unit is introduced, and lighting, indoor lighting and structural beams are combined. The rainwater system can also be integrated with the columns of the station building exterior wall unit combination. The modular advantages of the unitized roof are brought into play, combined with thermal insulation, lighting and shading, natural ventilation, and photovoltaic renewable energy and building integrated utilization, the comprehensive performance of the roof is comprehensively improved, the comfort of the internal space is improved, the building energy consumption and carbon emissions are reduced, the overall quality of the building is improved, and the application of green and low-carbon emission reduction technology in the unitized roof is realized. It can realize the integrated expression of building structure, adapt to the diversity and transparency of building effects, and the production and installation technology of each component is safe, reliable and highly adaptable. According to actual design requirements, the unitized roof system with integrated building structure decoration described in the present invention can be freely combined and matched with any number and type of three basic units.

[0047] It should be noted that the above-mentioned embodiments are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same / similar parts between the embodiments can be referred to each other. The terms "including" and "having" and their variations involved in the present invention document are intended to cover non-exclusive inclusions. The terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Unless the context clearly indicates otherwise, it should be understood that the data used in this way can be interchanged under appropriate circumstances. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts of the present invention.

[0048] The above description is only a specific implementation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A basic unit body, applied to a unitized roof system integrating building structure and decoration; characterized in that: The basic unit body comprises: Two supporting columns, each of which comprises: a column pier at the lower section, a prefabricated steel structure column at the middle section and a steel truss at the upper section, and the two supporting columns are connected by the steel truss; Two outward extension parts are respectively arranged on the two supporting columns, and the outward extension parts are located at the connection between the steel structure column and the steel truss; The decorative ceiling is respectively connected to the two extended parts and the steel trusses.

2. The basic unit according to claim 1, characterized in that: The column span between the steel structure columns of the two supporting columns is 40 meters to 50 meters; the connection between the steel trusses between the two supporting columns forms an angle steel beam structure, and the steel structure columns and the angle steel beam structure are exposed.

3. The basic unit according to claim 1, characterized in that: The column pier adopts a cast-in-place concrete column pier with embedded support parts; The steel structure column comprises a prefabricated steel column body and a ball joint support, the bottom of the steel column body is welded to the top of the ball joint support, and the bottom of the ball joint support is welded to the support embedded part in the column pier; The steel truss is welded to the top of the steel column body or is integrally formed.

4. The basic unit according to claim 1, characterized in that: The basic unit body comprises: a first basic unit, the first basic unit comprises two supporting columns, two outward extensions and the decorative ceiling, and the decorative ceiling of the first basic unit comprises: A perforated plate ceiling is connected to the two outward extension parts respectively; A standing seam metal roof panel is arranged on a side of the perforated ceiling away from the steel structure column and connected to the steel truss; The photovoltaic panel is arranged on a side of the vertical lock-edge metal roof panel away from the perforated plate ceiling.

5. The basic unit body according to claim 1, characterized in that: The basic unit body comprises: a second basic unit, the second basic unit comprises two supporting columns, two outward extensions and the decorative ceiling, and the decorative ceiling of the second basic unit comprises: A perforated plate ceiling is connected to the two outward extension parts respectively; A standing seam metal roof panel is arranged on a side of the perforated ceiling away from the steel structure column and connected to the steel truss; A crescent-shaped skylight is provided in a local area of ​​the vertical lock-edge metal roof panel, and a double-layer ETFE film is provided on one side of the crescent-shaped skylight facing the steel structure column; The photovoltaic panel is arranged on a side of the vertical lock-edge metal roof panel away from the perforated plate ceiling.

6. The basic unit body according to claim 4 or 5, characterized in that: The perforated plate ceiling adopts an aluminum alloy perforated plate ceiling, the vertical lock-edge metal roof panel adopts an aluminum-magnesium-manganese metal vertical lock-edge roof panel, and the photovoltaic panel adopts a monocrystalline silicon photovoltaic panel or a BIPV thin-film photovoltaic panel.

7. The basic unit body according to claim 1, characterized in that: The basic unit body comprises: a third basic unit, the third basic unit comprises two supporting columns, two outward extensions and the decorative ceiling, and the decorative ceiling of the third basic unit comprises: A solid beam connected to the two outward extension parts respectively; The glass lighting roof is arranged on a side of the solid beam away from the steel structure column and is connected to the steel truss.

8. The basic unit according to claim 7, characterized in that: The solid beams are made of steel structure solid beams, and the glass lighting roof is made of glazed laminated Low-E double-layer hollow glass roof.

9. A unitized roof system integrating building structure and decoration, characterized in that: The method comprises at least one of the first basic unit as claimed in claim 4, the second basic unit as claimed in claim 6, and the third basic unit as claimed in claim 7.

10. The unitized roof system with integrated building structure and decoration according to claim 9, characterized in that: comprising one said first basic unit, two said second basic units and one said third basic unit; The first basic unit and the third basic unit are arranged opposite to each other, and the two second basic units are arranged opposite to each other; The first basic unit is adjacent to two of the second basic units respectively, and the third basic unit is adjacent to two of the second basic units respectively; The first basic unit, the two second basic units and the third basic unit share a steel structure column located in the middle; The third basic unit is located in the central axis space of the station building.

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