A growable assembled building unit and construction method thereof

Abstract

The present invention discloses a growable assembled building unit, which relates to an assembled building, including a plurality of umbrella units; the umbrella unit includes a prefabricated column foundation, a prefabricated structural column, a prefabricated beam system and a roof; a mounting hole is provided in the prefabricated column foundation, a prefabricated cap is provided in the mounting hole, the prefabricated structural column is plugged into the mounting hole and connected to the prefabricated cap; an electric wire pipe is pre-installed between the prefabricated cap and the prefabricated structural column, and a rainwater pipe is pre-buried in the prefabricated structural column; a prefabricated steel structure is provided on the top of the prefabricated structural column, the prefabricated beam system is installed in the prefabricated steel structure, and the fixed connection between the steel beam and the prefabricated steel structure is completed by cast-in-place concrete. The present invention also discloses a construction method of a growable assembled building unit. The unitized growable design of the present invention realizes the high flexibility and scalability of the building, optimizes the load-bearing performance and stability of the building, and realizes the deep integration of functions such as pipelines, rainwater collection, and lighting facilities.

Description

Technical Field

[0001] The present invention relates to prefabricated buildings, and more particularly to a growable prefabricated building unit and a construction method thereof. Background Art

[0002] Umbrella-shaped buildings are composed of an umbrella and columns, and are shaped like an umbrella. With the development of construction technology, these umbrella-shaped buildings have changed from the original bottom-up continuous construction to prefabricated construction. Traditional prefabricated buildings often use all-steel structures, which are fast to build and highly efficient, and are widely used in these buildings. However, all-steel structures also have certain defects:

[0003] First, the all-steel structure has poor earthquake resistance and is easily affected by vibration, so it is not suitable for places with frequent earthquakes or large vibrations.

[0004] Second, in all-steel structures, the installation of electrical wires and drainage is generally exposed, which not only affects the appearance, but also poses certain safety hazards.

[0005] Third, the surface protection of all-steel structures relies too much on surface coatings. If the surface coating falls off, it will not only affect the aesthetics of the building, but also its lifespan. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a growable prefabricated building unit and a construction method thereof in view of the deficiencies in the prior art, thereby improving the controllability of construction quality and enhancing the rigidity and durability of the structure.

[0007] A growable prefabricated building unit described in the present invention comprises a plurality of umbrella units, and the plurality of umbrella units are spliced ​​with each other to form a prefabricated building shape; the umbrella unit comprises a prefabricated column foundation, a prefabricated structural column, a prefabricated beam system and a roof, the prefabricated column foundation is provided with an installation hole, the installation hole is provided with a prefabricated pedestal, the prefabricated structural column is inserted into the installation hole and connected to the prefabricated pedestal; an electric wire pipe is pre-installed between the prefabricated pedestal and the prefabricated structural column, and a rainwater pipe is pre-buried in the prefabricated structural column; a prefabricated steel structure is provided on the top of the prefabricated structural column, a steel beam is provided in the prefabricated beam system, the steel beam is installed in the prefabricated steel structure, and the fixed connection between the steel beam and the prefabricated steel structure is completed by cast-in-place concrete; a bottom mold is installed on the prefabricated beam system, and the roof is formed by cast-in-place concrete on the bottom mold.

[0008] Preferably, the prefabricated foundation comprises a steel structure cage composed of steel bars and steel section 1 and concrete wrapping the steel structure cage, and a post-cast ground beam, a post-cast cushion layer and a thin veneer layer are sequentially arranged above the prefabricated foundation to form a prefabricated column foundation, and the mounting hole is arranged above the steel section 1.

[0009] Preferably, the wire conduit is pre-buried in the prefabricated support, and one end of the wire conduit extends to the top of the prefabricated support, a through hole corresponding to the wire conduit is opened in the prefabricated structural column, and the wire conduit is inserted in the through hole.

[0010] Preferably, a plurality of bolts are fixedly provided on the outer wall of the rainwater pipe as steel bars of the prefabricated structural columns, the rainwater pipe extends above the prefabricated structural columns, and the prefabricated steel structure is fixed to one end of the rainwater pipe located above the prefabricated structural columns.

[0011] Preferably, the prefabricated steel structure comprises a ring plate and an anchor bolt; two ring plates arranged up and down are fixed on the outer wall at the top of the rainwater pipe, and an anchor bolt is fixed between the two ring plates.

[0012] Preferably, the precast beam system includes a plurality of precast concrete beams and precast edge-sealed beams; the precast concrete beam includes a steel section 2, a steel beam and a concrete beam body; the steel section 2 and the steel beam are respectively arranged at the two ends of the concrete beam body, and the steel beam is provided with a connecting section protruding from one end of the concrete beam body, and the connecting section is installed in the precast steel structure; the steel section 2 is provided with a lap section protruding from the other end of the concrete beam body, and the end of the precast edge-sealed beam is provided with a lap block, and the lap block is overlapped in the lap section.

[0013] Preferably, a raised block is provided at the bottom of the bottom mold edge, and a positioning pit is provided at the overlap of the precast concrete beam and the precast edge beam, and the raised block is inserted into the positioning pit.

[0014] Preferably, the bottom mold is a UHPC bottom mold.

[0015] Preferably, a wall panel is provided between the roof and the prefabricated column foundation.

[0016] A construction method using the growable prefabricated building unit, the method comprising:

[0017] Step 1: Prepare prefabricated column foundations, prefabricated structural columns and prefabricated beam systems, and transport the prepared prefabricated column foundations, prefabricated structural columns and prefabricated beam systems to the construction site;

[0018] Step 2: After the ground to be installed is treated, the prefabricated column foundation is hoisted onto the ground, and the electric wire pipe and rainwater pipe are connected to the corresponding external wire pipe;

[0019] Step 3: hoist the prefabricated structural column to the top of the prefabricated column foundation, align the through hole of the prefabricated structural column with the electric wire pipe, lower the prefabricated structural column, and insert the prefabricated structural column into the installation hole, and then perform grouting treatment on the gap in the installation hole;

[0020] Step 4: hoist the precast concrete beams of the precast beam system onto the precast steel structure, and insert the connecting section of the steel beam into the precast steel structure, and then weld and fix it;

[0021] Step 5: After all precast concrete beams are installed according to step 4, the precast steel structure is enclosed with formwork and then concrete is poured;

[0022] Step 6: Install the prefabricated edge beam on the edge of the prefabricated concrete beam to complete the installation of the prefabricated beam system;

[0023] Step 7: Install the bottom formwork on the precast concrete beam, and then pour concrete on the top of the bottom formwork to complete the construction of an umbrella unit;

[0024] Step 8: Construct and splice multiple umbrella units according to steps 1 to 7 to complete the construction of the prefabricated building shape.

[0025] Beneficial Effects

[0026] The advantages of the present invention are:

[0027] 1. High assembly rate and improved construction efficiency:

[0028] The present invention adopts a combination of prefabricated parts and on-site casting, realizes highly prefabricated assembly of umbrella units, enables most building components to be manufactured in the factory, and reduces the complexity and uncertainty of on-site construction. This not only greatly shortens the construction period, but also reduces labor costs and construction risks, while improving the controllability of construction quality.

[0029] 2. Innovative application of umbrella-shaped structure design and integrated functional integration:

[0030] The unique umbrella-shaped structure design of the present invention not only optimizes the load-bearing performance and stability of the building, but more importantly, it realizes the deep integration of functions such as power pipelines, rainwater collection, and lighting facilities. Through standardized design and modular production, these functional elements are successfully built into the building structure. This design not only improves the overall aesthetics of the building, but also enhances the convenience and safety of use.

[0031] 3. Material selection and implementation of environmental protection concepts:

[0032] In terms of material application, the present invention abandons the all-steel structure commonly used in traditional prefabricated buildings and adopts a composite structure of concrete and steel, which not only reflects a deep understanding of material performance optimization, but also further improves the rigidity and durability of the structure and enhances the seismic performance of the building. This material combination method not only achieves a win-win situation in economic and environmental benefits, but also provides a new idea for the sustainable development of the construction industry.

[0033] 4. The ultimate display of unitized growability and spatial flexibility:

[0034] Another notable feature of the present invention is its unitized growable design. Each building unit is regarded as an independent, freely connectable module, which gives the building extremely high flexibility and scalability. Users can flexibly combine units of different sizes and shapes according to actual needs to build a diverse group of buildings. This design not only meets the pursuit of functional diversity and personalization in modern architecture, but also provides great convenience for future renovation and upgrading of buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The three-dimensional structure of the assembled building unit of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 2 The three-dimensional structure of the assembled building unit of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 3 It is a schematic diagram of the three-dimensional structure of the umbrella unit of the present invention;

[0038] Figure 4 It is a schematic diagram of the three-dimensional structure of the prefabricated column foundation of the present invention;

[0039] Figure 5 It is a schematic diagram of the internal structure of the prefabricated column foundation of the present invention;

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the prefabricated structure of the present invention;

[0041] Figure 7 It is a schematic diagram of the internal structure of the prefabricated structural column of the present invention;

[0042] Figure 8 It is a schematic diagram of the explosion structure of the prefabricated beam system of the present invention;

[0043] Fig. 9 It is a schematic diagram of the internal structure of the precast concrete beam of the present invention;

[0044] Fig.10 It is a schematic structural diagram of the overlap of the precast concrete beam and the precast edge beam of the present invention;

[0045] Fig.11 This is a schematic diagram of the installation structure of the prefabricated column foundation, prefabricated structural column, and prefabricated beam system of the present invention;

[0046] Fig.12 Based on Fig.11 Schematic diagram of roof installation structure;

[0047] Fig.13 It is a schematic diagram of the umbrella unit multi-style roof design of the present invention;

[0048] Fig.14 It is a schematic diagram of various designs of the prefabricated building units of the present invention. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0050] Embodiment 1

[0051] See also Figure 1-Figure 14 The present invention provides a growable assembled building unit, comprising a plurality of umbrella units 1, wherein the plurality of umbrella units 1 are connected to form an assembled building shape, such as Figure 1 and Figure 2 As shown. Figure 3 As shown, in this embodiment, the umbrella unit 1 includes a prefabricated column foundation 2, a prefabricated structural column 3, a prefabricated beam system 4 and a roof 5. Among them, the prefabricated column foundation 2, as an underground part, is responsible for supporting the above-ground part of the umbrella unit 1. The above-ground part of the umbrella unit 1 is firstly a prefabricated structural column 3, in which a wire pipe 7 and a rainwater pipe 30 are preset, and above it is a prefabricated beam system 4, including a prefabricated concrete beam 40 and a prefabricated edge beam 41. Among them, the installation track of the lighting fixture is hidden under the prefabricated concrete beam 40. A bottom mold 50 is placed on the prefabricated beam system 4, and the bottom mold 50 is a UHPC bottom mold. Finally, there is a roof 5 of cast-in-place concrete. A waterproof and heat-insulating layer can be laid on the roof 5 to provide a waterproof effect. Such a structure forms a rainwater gutter 6 structure above the umbrella unit 1. In order to promote efficient drainage of rainwater and reduce water accumulation, we have optimized the tilt angle of the rain gutter 6, which is available within 8° to 25°, and the optimal angle is 20°. This design not only meets the functional needs of rapid drainage, but also takes into account aesthetic considerations, making the umbrella unit more visually smooth and harmonious, further enhancing the practical value and ornamental value of the overall design.

[0052] Each prefabricated part of the umbrella unit 1 will be introduced below.

[0053] like Figure 4 The structure diagram of the prefabricated column foundation 2 is shown, in which a mounting hole 20 is provided, a prefabricated support 21 is provided in the mounting hole 20, and the prefabricated structural column 3 is inserted into the mounting hole 20 and connected to the prefabricated support 21. A wire tube 7 is pre-installed between the prefabricated support 21 and the prefabricated structural column 3 for passing wires to realize power supply for the lighting fixtures in the installation track. Moreover, the hidden pre-buried wire tube 7 is more beautiful and safe.

[0054] like Figure 5 As shown, the prefabricated cap 21 includes a steel cage composed of steel bars 210 and steel section 1 211 and concrete wrapped around the steel cage. A post-cast ground beam 22, a post-cast cushion layer 23 and a thin veneer layer 24 are sequentially arranged above the prefabricated cap 21 to form a prefabricated column foundation 2. The manufacturing method is to build a steel cage in a factory, then pour concrete, and sequentially pour the post-cast ground beam 22, the post-cast cushion layer 23 and the thin veneer layer 24. After the concrete solidifies, a prefabricated column foundation 2 can be obtained. In the prefabricated column foundation 2, the mounting hole 20 is arranged above the steel section 1 211. Through the supporting effect of the steel section 1 211, better supporting force can be provided for the prefabricated structural column 3.

[0055] When the steel structure cage is built, it is necessary to put in the wire tube 7 before pouring concrete. Both ends of the wire tube 7 need to extend outside the steel structure cage to prevent the ends from being sealed. Among them, in the poured prefabricated pedestal 21, one end of the wire tube 7 extends to the top of the prefabricated pedestal 21. A through hole corresponding to the wire tube 7 is opened in the prefabricated structural column 3, and the wire tube 7 is inserted into the through hole. Such a design is conducive to the docking installation of the prefabricated structural column 3 and the prefabricated column foundation 2.

[0056] like Figure 6-Figure 7 As shown, regarding the prefabricated structural column 3, a rainwater pipe 30 is pre-buried therein, and the rainwater pipe 30 adopts a seamless steel pipe. The rainwater pipe 30 extends to the top of the prefabricated structural column 3, and a prefabricated steel structure 32 is fixed to one end of the rainwater pipe 30 located above the prefabricated structural column 3. The rainwater pipe 30 is used to discharge rainwater from the top of the umbrella unit 1. A prefabricated steel structure 32 is provided on the top of the prefabricated structural column 3, which is used to install the prefabricated beam system 4, and the steel beam 403 is fixedly connected to the prefabricated steel structure 32 by cast-in-place concrete. By casting in-place concrete at the connection between the prefabricated beam system 4 and the prefabricated structural column 3, the exposed steel structure at the connection can be wrapped and protected, and the reinforced concrete structure has better support and longer service life than the steel structure.

[0057] Specifically, a plurality of bolts 31 are fixedly provided on the outer wall of the rainwater pipe 30 as the steel bars of the prefabricated structural column 3. The provision of the bolts 31 can increase the friction between the steel bars and the concrete of the prefabricated structural column 3, thereby improving the stability of the structure. The prefabricated steel structure 32 includes a ring plate 320 and an anchor bolt 321. Two ring plates 320 arranged up and down are fixedly provided on the outer wall at the top of the rainwater pipe 30, an anchor bolt 321 is fixedly provided between the two ring plates 320, and a plug-in groove matching the connecting section of the steel beam 403 is formed between the ring plates 320, the anchor bolt 321 and the rainwater pipe 30, so as to facilitate the installation of the prefabricated concrete beam 40.

[0058] like Figure 8-Figure 11As shown, the precast beam system 4 includes a plurality of precast concrete beams 40 and precast edge beams 41. In this embodiment, the umbrella unit 1 adopts a hexagonal design, so the periphery of the precast structural column 3 is designed to have six outwardly extending sectors, and there are also six precast concrete beams 40 and precast edge beams 41. The same six precast concrete beams 40 and precast edge beams 41 form a stable hexagonal structural beam system.

[0059] The precast concrete beam includes a steel section 401, a steel beam 403 and a concrete beam body 402. The steel section 401 and the steel beam 403 are respectively arranged at the two ends of the concrete beam body 402, and the steel beam 403 is provided with a connecting section protruding from one end of the concrete beam body 402, and the connecting section is installed in the plug-in slot of the precast steel structure 32. The steel section 401 is provided with a lap section 404 protruding from the other end of the concrete beam body 402, and the end of the precast edge beam 41 is provided with a lap block 410, which is overlapped in the lap section 404, simplifying the installation process and making the installation faster and more efficient.

[0060] like Fig.12 As shown, in order to facilitate the installation and positioning of the bottom mold 50, in this embodiment, a protruding block 51 is provided at the bottom of the edge of the bottom mold 50, and a positioning pit 43 is provided at the overlap of the precast concrete beam 40 and the precast edge beam 41. The protruding block 51 is inserted into the positioning pit 43, thereby providing a good positioning effect for the bottom mold 50.

[0061] like Fig.13 As shown, a wall panel 9 is provided between the roof 5 and the prefabricated column foundation 2 of this embodiment, so that a relatively closed space can be formed in the umbrella unit 1, which can meet the use in various scenarios. The wall panel 9 and the roof 5 can be customized according to the needs. For example, the wall panel 9 can be used alone or in combination with different wall surfaces such as concrete wall panels, glass curtain walls, and glass composite wall panels. In addition to the above-mentioned cast roof, the roof 5 can also use a grille roof 5, a glass roof 5, a hollow structure roof 5, etc., independently or in different combinations, such as Fig.14 shown.

[0062] Embodiment 2

[0063] See also Figure 1-Figure 14 This embodiment provides a method for constructing a growable prefabricated building unit, comprising the following steps:

[0064] Step 1: Prepare the prefabricated column foundation 2, prefabricated structural column 3 and prefabricated beam system 4 in the factory, and transport the prepared prefabricated column foundation 2, prefabricated structural column 3 and prefabricated beam system 4 to the construction site.

[0065] Step 2: After the ground to be installed is treated for construction, the prefabricated column foundation 2 is hoisted onto the ground, and the electric wire pipe 7 and the rainwater pipe are connected to the corresponding external wire pipe.

[0066] Step 3: hoist the prefabricated structural column 3 above the prefabricated column foundation 2, and align the through hole of the prefabricated structural column 3 with the wire tube 7, then lower the prefabricated structural column 3, and insert the prefabricated structural column 3 into the installation hole 20, and then grout the gap in the installation hole 20 to fill and fix the connection.

[0067] Step 4: hoist the precast concrete beam 40 of the precast beam system 4 onto the precast steel structure 32, and insert the connecting section of the steel beam 403 into the precast steel structure 32, and then perform welding and fixing treatment on it. After such fixing treatment, the precast concrete beam 40 can be fixed above the precast structure column 3 without additional support. Of course, in actual construction, it can also be determined as needed whether to provide additional support to the precast concrete beam 40 when installing it, and this application does not limit this.

[0068] Step 5: After all prefabricated concrete beams 40 are installed according to step 4, the prefabricated steel structure 32 is enclosed by a template, and then concrete is poured to form a reinforced concrete structure between the beams and columns.

[0069] Step 6: Install the prefabricated edge beam 41 on the edge of the prefabricated concrete beam 40 to complete the installation of the prefabricated beam system 4.

[0070] Step 7: Install the bottom form 50 on the precast concrete beam 40 , and then pour concrete on the bottom form 50 to complete the construction of an umbrella unit 1 .

[0071] Step 8: Construct and splice multiple umbrella units 1 according to steps 1 to 7 to complete the construction of the assembled building shape.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A growable assembled building unit, characterized in that: The invention comprises a plurality of umbrella units (1), wherein the plurality of umbrella units (1) are spliced ​​together to form an assembled building shape; the umbrella unit (1) comprises a prefabricated column foundation (2), a prefabricated structural column (3), a prefabricated beam system (4) and a roof (5); a mounting hole (20) is provided in the prefabricated column foundation (2); a prefabricated bearing platform (21) is provided in the mounting hole (20); the prefabricated structural column (3) is inserted into the mounting hole (20) and connected to the prefabricated bearing platform (21); a prefabricated bearing platform (21) is prefabricated between the prefabricated structural column (3) and the prefabricated beam system (4). An electric wire pipe (7) is arranged, and a rainwater pipe (30) is pre-buried in the prefabricated structural column (3); a prefabricated steel structure (32) is arranged on the top of the prefabricated structural column (3); a steel beam (403) is arranged in the prefabricated beam system (4), and the steel beam (403) is installed in the prefabricated steel structure (32), and the steel beam (403) and the prefabricated steel structure (32) are fixedly connected by cast-in-place concrete; a bottom mold (50) is installed on the prefabricated beam system (4), and a roof (5) is formed by cast-in-place concrete on the bottom mold (50); The prefabricated beam system (4) comprises a plurality of prefabricated concrete beams (40) and prefabricated edge-sealed beams (41); the prefabricated concrete beams comprise a second steel section (401), a steel beam (403) and a concrete beam body (402); the second steel section (401) and the steel beam (403) are respectively arranged at two ends of the concrete beam body (402), and the steel beam (403) is provided with a connecting section protruding from one end of the concrete beam body (402), and the connecting section is installed in the prefabricated steel structure (32); the second steel section (401) is provided with a lap section (404) protruding from the other end of the concrete beam body (402), and the end of the prefabricated edge-sealed beam (41) is provided with a lap block (410), and the lap block (410) is lapped in the lap section (404).

2. A growable prefabricated building unit according to claim 1, characterized in that: The prefabricated cap (21) comprises a steel structure cage composed of steel bars (210) and a steel section (211), and concrete wrapping the steel structure cage. A post-cast ground beam (22), a post-cast cushion layer (23) and a thin veneer layer (24) are sequentially arranged above the prefabricated cap (21) to form a prefabricated column foundation (2). The mounting hole (20) is arranged above the steel section (211).

3. A growable prefabricated building unit according to claim 1, characterized in that: The electric wire tube (7) is pre-buried in the prefabricated support platform (21), and one end of the electric wire tube (7) extends above the prefabricated support platform (21); a through hole corresponding to the electric wire tube (7) is opened in the prefabricated structural column (3), and the electric wire tube (7) is inserted into the through hole.

4. A growable prefabricated building unit according to claim 1, characterized in that: A plurality of bolts (31) are fixedly provided on the outer wall of the rainwater pipe (30) as steel bars of the prefabricated structural column (3); the rainwater pipe (30) extends above the prefabricated structural column (3); and the prefabricated steel structure (32) is fixed to one end of the rainwater pipe (30) located above the prefabricated structural column (3).

5. A growable prefabricated building unit according to claim 4, characterized in that: The prefabricated steel structure (32) comprises a ring plate (320) and an anchor bolt (321); two ring plates (320) arranged up and down are fixed on the outer wall of the top of the rainwater pipe (30), and an anchor bolt (321) is fixed between the two ring plates (320).

6. The growable assembled building unit according to claim 1, characterized in that: A protruding block (51) is provided at the bottom of the edge of the bottom mold (50), and a positioning pit (43) is provided at the overlap of the precast concrete beam (40) and the precast edge beam (41), and the protruding block (51) is inserted into the positioning pit (43).

7. A growable prefabricated building unit according to claim 6, characterized in that: The bottom mold (50) is a UHPC bottom mold.

8. The growable assembled building unit according to claim 1, characterized in that: A wall panel (9) is provided between the roof (5) and the prefabricated column foundation (2).

9. A construction method using the growable assembled building unit according to any one of claims 1 to 8, characterized in that: The method includes: Step 1: fabricate a prefabricated column foundation (2), a prefabricated structural column (3), and a prefabricated beam system (4), and transport the fabricated prefabricated column foundation (2), the prefabricated structural column (3), and the prefabricated beam system (4) to a construction site; Step 2: After the ground to be installed is treated for construction, the prefabricated column foundation (2) is hoisted onto the ground, and the electric wire pipe (7) and the rainwater pipe are connected to the corresponding external wire pipe; Step 3: hoist the prefabricated structural column (3) above the prefabricated column foundation (2), align the through hole of the prefabricated structural column (3) with the electric wire tube (7), lower the prefabricated structural column (3), and insert the prefabricated structural column (3) into the installation hole (20), and then perform grouting treatment on the gap in the installation hole (20); Step 4: hoisting the precast concrete beam (40) of the precast beam system (4) onto the precast steel structure (32), and inserting the connecting section of the steel beam (403) into the precast steel structure (32), and then welding and fixing it; Step 5: After all precast concrete beams (40) are installed according to step 4, the precast steel structure (32) is enclosed by a formwork, and then concrete is poured; Step 6: Install the prefabricated edge beam (41) on the edge of the prefabricated concrete beam (40) to complete the installation of the prefabricated beam system (4); The prefabricated beam system (4) comprises a plurality of prefabricated concrete beams (40) and prefabricated edge-sealed beams (41); the prefabricated concrete beam comprises a second steel section (401), a steel beam (403) and a concrete beam body (402); the second steel section (401) and the steel beam (403) are respectively arranged at two ends of the concrete beam body (402), and the steel beam (403) is provided with a connecting section protruding from one end of the concrete beam body (402), and the connecting section is installed in the prefabricated steel structure (32); the second steel section (401) is provided with a lap section (404) protruding from the other end of the concrete beam body (402), and the end of the prefabricated edge-sealed beam (41) is provided with a lap block (410), and the lap block (410) is lapped in the lap section (404); Step 7: Install the bottom form (50) on the precast concrete beam (40), and then pour concrete on the top of the bottom form (50) to complete the construction of an umbrella unit (1); Step 8: Construct and splice multiple umbrella units (1) according to steps 1 to 7 to complete the construction of the assembled building shape.

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