Assembled synthetic building system and construction method thereof

Abstract

The invention discloses an assembled and synthesized building system and a construction method thereof.The building system comprises unit modules (1) and corridor modules (2), and the unit modules (1) and the corridor modules (2) each comprise a wall body and a top plate; top plates of the unit modules (1) are fully-prefabricated reinforced concrete slabs, top plates of the corridor modules (2) are semi-prefabricated concrete slabs, and cast-in-place areas (3) are arranged between adjacent prefabricated walls of the adjacent unit modules (1) and the corridor modules (2) and between adjacent prefabricated walls of every two adjacent unit modules (1). Structural steel bars are arranged in the adjacent prefabricated walls, the walls on the two sides are connected together through connecting assemblies (4), and the corridor modules (2) are connected with the adjacent unit modules (1) through cast-in-place concrete on the cast-in-place areas (3) and the top plates of the corridor modules (2). According to the assembled and synthesized building system, the site construction workload can be greatly reduced, and the area occupied by the wall at the joint of the adjacent modules can be reduced.

Description

Technical Field

[0001] The present invention relates to a building structure and a construction method thereof, and in particular to a building structure assembled and synthesized by prefabricated building modules and a construction method thereof. Background Art

[0002] In the prior art, the "assembled and synthesized" building method is an innovative building method. The building is divided into several building modules, and each module is a prefabricated independent three-dimensional product integrating walls, beams, shear walls, floors, etc. All equipment, pipelines, decoration, fixed furniture, etc. within the module have been prefabricated in the factory, and the exterior decoration can also be completed. These module components are transported to the construction site, and the building can be simply and quickly assembled. This method changes the traditional "series" operation mode of main body - interior decoration - equipment into an integrated "parallel" operation mode, and most of the building structure is completed in the factory, which can greatly improve the quality and efficiency, reduce the on-site construction procedures, reduce the influence of the building process by weather conditions, labor resources and construction site restrictions, and is also conducive to managing the construction quality, improving the productivity, safety and sustainability of the construction industry.

[0003] As Figure 1 shown, the top plate of the existing building module usually adopts a semi-prefabricated plate with a thickness of 70 mm, and the remaining 90 mm of the floor slab above the top plate is poured on the construction site. Due to stiffness limitations, temporary supports for the top plate of the building module need to be provided on site during construction. On the one hand, this will increase the on-site construction work content. On the other hand, since the finishing cannot be completed in the factory, it will have a corresponding impact on the embedded pipeline on the top of the module, further increasing the on-site construction volume.

[0004] In particular, the existing building modules are all applied to unit modules composed of bedrooms, bathrooms, kitchens, etc. For the corridor area of the building, as Figure 2 shown, the common practice in the industry at present is to directly pour on the construction site by combining the building modules on both sides with the floor slab, that is, wet work is required to connect each part, and scaffolds and formworks need to be erected on site. This not only increases the on-site workload, but also requires large panel formworks during construction, increasing the difficulty of construction organization. And compared with the completion of all modules prefabricated in the factory, the floor tile finishing work in this area cannot be completed in the factory, and the degree of industrialization is relatively low.

[0005] In addition, since each building module is a hexahedron, and to ensure structural safety and construction requirements, double-wall situations inevitably occur at the adjacent connection positions between modules. In this case, it is inevitable to waste some usable area of the user. To make up for the loss of usable area caused by double walls, the only feasible solution in terms of design is to minimize the thickness of the walls of each assembled module, including structural walls. On the one hand, the owner and the architect require extremely thin walls. On the other hand, to ensure the safety of the main structure, the thickness of the structural wall cannot be too small. This contradiction has always existed, especially obvious in the assembled composite building method. In addition, during the installation process of each building module, the structural part needs to fix the wall steel bars on-site, which not only increases the construction workload but also requires a relatively high technical management level at the construction site. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an assembled composite building system and its construction method that can significantly reduce the on-site construction volume, greatly improve the building prefabrication rate, and avoid excessive wall area occupation.

[0007] The technical solution adopted by the present invention to solve the above technical problems is to design and manufacture an assembled composite building system, including: a plurality of prefabricated unit modules, each unit module including a wall and a roof slab; It further includes a prefabricated corridor module, and the corridor module includes a wall and a roof slab; The roof slab of the unit module is a fully prefabricated reinforced concrete slab, and the roof slab of the corridor module is a semi-precast concrete slab. There are cast-in-place areas between the adjacent precast walls of adjacent unit modules and corridor modules, and between the adjacent precast walls of two adjacent unit modules. Structural steel bars are provided in the adjacent precast walls, and the two side walls are connected together through connection components. The corridor module is connected to the adjacent unit module by casting concrete in the cast-in-place area and above the roof slab of the corridor module.

[0008] The thickness of the roof slab of the unit module is 150 - 180 mm, the thickness of the roof slab of the corridor module is 50 - 70 mm, the thickness of the cast-in-place area is 100 - 150 mm, and the thickness of the precast walls on both sides of the cast-in-place area is 50 - 90 mm.

[0009] The connection component includes: multiple columns of vertically arranged and exposed embedded parts respectively embedded in the precast walls on both sides of the cast-in-place area, a middle connecting piece, and vertical connecting steel bars; A vertical through hole is provided in the exposed part of the embedded part, and the embedded parts on the precast walls on both sides of the cast-in-place area are horizontally corresponding one by one; The middle connecting piece includes: a plurality of intermediate connecting pieces arranged vertically, and a vertical rod fixedly connected to the plurality of intermediate connecting pieces; there are two connecting holes on the left and right of the intermediate connecting piece and are respectively vertically corresponding to the vertical through holes on the embedded parts on both sides of the precast wall; The series-connected steel bars pass through the corresponding connection holes and vertical through-holes to connect the embedded parts on both sides of the precast wall bodies and the middle connecting parts together.

[0010] The embedded parts are steel sheets or steel rings partially embedded in the precast wall bodies, and the parts of each column of embedded parts embedded in the wall bodies are connected together by vertical steel bars; the vertical rods pass through the central holes opened between the left and right two connection holes of each middle connecting piece and are welded and fixed to the middle connecting piece.

[0011] The unit module and the corridor module further include a precast bottom plate. The thickness of the bottom plate of the unit module is 60 - 80 mm, and the lower part of the bottom plate of the corridor module is a reinforced concrete slab with a thickness of 60 - 80 mm, and the upper part is a precast floor tile finish.

[0012] At the joint of the top plate of the unit module and the adjacent unit module, there is a concave connecting part. This connecting part is a semi-precast slab structure and is provided with exposed steel bars. By connecting the reserved exposed steel bars of the connecting part with the reserved exposed steel bars arranged at the edge of the top plate of the adjacent unit module and casting concrete above this connecting part, the top plates of the adjacent unit modules are connected together.

[0013] The top surface of the top plate of the corridor module is lower than the top surface of the top plate of the unit module. The left and right sides of the top plate of the corridor module are thinner than the middle part. Above the left and right sides of the top plate of the corridor module are the positions of the structural beams and are provided with precast steel bars for the beams.

[0014] The construction method of the assembled composite building system of the present invention includes the following steps: Step 1: Prefabricate independent unit modules and corridor modules in the factory; Step 2: Install the unit modules and corridor modules to the set positions on the cleaned floor surface, leaving gaps between adjacent unit modules and corridor modules and between adjacent two unit modules as the cast-in-place areas; Step 3: Connect the adjacent modules with connection components, including connecting adjacent unit modules and adjacent unit modules and corridor modules, and tying the floor steel bars on the top of the corridor module; Step 4: Pour concrete in the cast-in-place areas and on the top of the corridor module to form structural walls and floor slabs.

[0015] The connection components include: multiple columns of vertically arranged and exposed embedded parts respectively embedded in the precast wall bodies on both sides of the cast-in-place area, a middle connecting part composed of vertical rods and multiple vertically arranged middle connecting pieces fixed to the vertical rods, and vertical series-connected steel bars; The middle connecting piece is provided with left and right two connection holes and is vertically correspondingly arranged perpendicular to the vertical through-holes arranged on the embedded parts on the precast wall bodies on both sides; The step of connecting adjacent modules with the connecting component in Step 3 includes the following steps: a. First, pass the serial steel bars through the vertical through holes of the embedded parts on the precast wall of one side module and the corresponding side connection holes of the middle connecting piece, and rotate the middle connecting piece around the serial steel bars until it is close to this side module; b. After the adjacent two side modules are installed in place, rotate the middle connecting piece so that the connection holes on its other side are vertically corresponding to the vertical through holes of the embedded parts on the precast wall of the other side, and then pass the serial steel bars through the connection holes and vertical through holes on the other side to connect the two precast walls together.

[0016] Compared with the prior art, in the assembled and synthesized building system of the present invention, the top plate of the unit module adopts a fully precast reinforced concrete slab, eliminating the need for temporary supports on site and enabling the possibility of completing the partial finishing of the top plate in the factory. Structural steel bars are provided in the adjacent walls of adjacent modules, and horizontal connection of the two side walls is achieved through the connecting component. Especially in the area with limited space at the wall end, there is no need for additional steel bar binding construction on site. The gap between adjacent walls is filled with cast-in-place concrete to form a structural wall. Compared with the non-structural wall design, the overall wall thickness is reduced by about 50 mm, making the land use efficiency of the entire building higher and effectively reducing the on-site workload. The corridor part is also included in the module manufacturing scope. The top plate of the corridor module adopts a semi-precast slab, and the precast steel bars of the cross beam arranged along the corridor can be fixed on the top of the module on site. During construction, there is no need for scaffolding and large steel formwork on site. The concrete can be poured simultaneously with the cast-in-place area above the top plate of the corridor module to form a floor surface, and there is no gap sealing process at the wall head. Designers can also better layout the floors to adapt to the site limitations. The floor slab of the corridor module can complete the floor tile laying in the factory, reducing the later decoration work. Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of an existing building module; Figure 2 is a structural schematic diagram of the corridor area in an existing assembled and synthesized building; Figure 3 is a structural schematic diagram of the connection between adjacent unit modules in the assembled and synthesized building system of the present invention; Figure 4 is a structural schematic diagram of the connection between the unit module and the corridor module in the assembled and synthesized building system of the present invention; Figure 5 is a schematic diagram of the top structural cross beam of the corridor module; Figure 6 is a vertical structural diagram of the connection component between two horizontally adjacent modules; Figure 7 is a vertical structural schematic diagram of the middle connecting piece; Figure 8 Schematic diagram of the horizontal structure of the middle connecting member; Figure 9 is Figure 6 Enlarged view of part A in; Figure 10 Schematic diagram of the construction method of the assembled and synthetic building system of the present invention Figure 1 ; Figure 11 Schematic diagram of the construction method of the assembled and synthetic building system of the present invention Figure 2 . Embodiment

[0018] The following will be further described in detail with reference to the embodiments shown in the drawings.

[0019] As Figure 10 and Figure 11 shown, the assembled and synthetic building system of the present invention includes a plurality of prefabricated unit modules 1 and prefabricated corridor modules 2 provided in the corridor area. Both the unit module 1 and the corridor module 2 at least include a wall and a roof slab, and may further include a floor slab. The roof slab of the unit module 1 is a fully prefabricated reinforced concrete slab, and the roof slab of the corridor module 2 is a semi-prefabricated concrete slab. A gap is reserved between the adjacent prefabricated walls of the adjacent unit module 1 and the corridor module 2 and between the adjacent prefabricated walls of the adjacent two unit modules 1 to form a cast-in-place area 3 for casting concrete on site. Structural steel bars are provided in the adjacent prefabricated walls, and the two side walls are connected together by a connecting component 4. The corridor module 2 is connected to the adjacent unit module 1 by casting concrete in the cast-in-place area 3 and above the roof slab of the corridor module 2. A 10-mm cement mortar cushion 9 may be provided between the modules on the upper and lower adjacent floors to control the floor level.

[0020] In this embodiment, as Figure 3 shown, the unit module 1 includes an integrally prefabricated unit wall 11, a unit roof slab 12, and a unit floor slab 13. Among them, the unit roof slab 12 is a fully prefabricated reinforced concrete slab with a thickness of 160 mm, the thickness of the unit wall 11 connected to the cast-in-place area 3 is 65 mm, and the thickness of the unit floor slab 13 is 70 mm. Since the unit roof slab 12 adopts a fully prefabricated reinforced concrete slab, the stiffness is improved, and there is no need to set up temporary supports for the unit roof slab 12 at the construction site, which can effectively reduce the on-site workload.

[0021] In this embodiment, as Figure 4As shown, the corridor module 2 includes a prefabricated integral corridor wall 21, a corridor top plate 22 and a corridor bottom plate 23. Among them, the corridor top plate 22 is a semi-prefabricated plate with a flat bottom surface, 50 mm thick on both sides and 70 mm thick in the middle. The top surface of the corridor top plate 22 is 300 mm lower than the top surface of the unit top plate 12. A cast-in-place floor area 8 is formed between the top surface of the corridor top plate 22 and the plane where the top surface of the adjacent unit module 1 is located. As Figure 5 shown, above the relatively thin left and right sides of the corridor top plate 22 is the position of the structural cross beam arranged along the corridor direction, and the cross beam precast steel bars 6 are fixedly arranged. The thickness of the corridor wall 21 connected to the cast-in-place area 3 is 65 mm. The lower part of the corridor bottom plate 23 is a reinforced concrete slab with a thickness of 70 mm, and the upper part is a precast floor tile finish with a thickness of 55 mm. Thus, because the reinforced concrete corridor walls 21 are arranged on both sides of the corridor module 2, there is no need to set up temporary supports for the corridor top plate 22 at the construction site, and the finishing of the corridor top plate 22 and the laying of the floor tiles on the corridor bottom plate 23 can be completed in the factory, reducing the on-site workload and the later decoration work. The thickness of the cast-in-place area 3 is 120 mm. In this way, the thickness of the cast-in-place area 3 plus the thickness of the two side precast walls is 250 mm. Compared with the non-structural wall design, the overall wall thickness is reduced by about 50 mm, making the utilization rate of the whole building higher.

[0022] In this embodiment, as Figure 3 and Figure 4 shown, at the joint of the top plate of the unit module 1 and the top plate of the adjacent unit module 1 or corridor module 2, a concave connecting part 5 is provided. The connecting part 5 is a semi-prefabricated plate structure with a width of 300 - 500 mm and reserved exposed steel bars. The bottom surface of the connecting part 5 is flush with the bottom surface of the unit top plate 12. By connecting the reserved exposed steel bars of the connecting part 5 with the reserved exposed steel bars arranged at the edge of the top plate of the adjacent unit module 1 and casting concrete above the connecting part 5, the top plates of the adjacent unit modules 1 are connected together. By connecting the reserved exposed steel bars of the connecting part 5 with the steel bars arranged at the top of the adjacent corridor module 2 and casting concrete above the connecting part 5 and the corridor module 2, the tops of the adjacent unit module 1 and corridor module 2 are connected together.

[0023] As Figures 6 to 9 shown, the connecting component 4 includes: embedded parts 41 respectively embedded in the two side precast walls of the cast-in-place area 3 and partially exposed, a middle connecting piece 42 for connecting the embedded parts 41 on the two side precast walls, and vertical connecting steel bars 43.

[0024] Among them, multiple columns of embedded parts 41 are provided on each side precast wall. Each column is composed of multiple embedded parts 41 arranged vertically at a certain distance, and the embedded parts 41 on the two side precast walls of the cast-in-place area 3 are horizontally corresponding one by one. In this embodiment, as Figure 9As shown, the embedded part 41 is a steel sheet or steel ring partially embedded in the precast wall body. The exposed part thereof is provided with a vertical through hole 411. The parts of each column of embedded parts 41 embedded in the wall body are connected together by vertical steel bars 7. Thus, the embedded parts 41 can be firmly and reliably fixed and embedded in the precast wall body, and reliable connection between the steel bars in the precast wall body and the connection assembly 4 can be realized.

[0025] As Figure 7 and Figure 8 As shown, each middle connector 42 includes: a plurality of intermediate connecting pieces 421 arranged vertically, and a vertical rod member 422 fixedly connected to the plurality of intermediate connecting pieces 421. The intermediate connecting pieces 421 are provided with two vertical through holes 423 on the left and right, which are vertically corresponding to the vertical through holes 411 on the embedded parts 41 at corresponding positions on the two sides of the precast wall body respectively. In this embodiment, a central hole 424 is formed between the two vertical through holes 423 on the left and right of the intermediate connecting piece 421. The vertical rod member 422 passes through the central holes 424 of the intermediate connecting pieces 421 in the same vertical column and is fixedly welded to the intermediate connecting pieces 421 in this vertical column.

[0026] As Figure 9 As shown, on the left and right sides of the vertical rod member 422 of each middle connector 42, there is a connecting steel bar 43 respectively. The two connecting steel bars 43 on both sides pass through the vertically corresponding connecting holes 423 and vertical through holes 411 on both sides respectively, so as to connect the embedded parts 41 and the middle connectors 42 on the two sides of the precast wall body together. The embedded parts 41 are prefabricated integrally with the unit module 1 or the corridor module 2 in the factory. The middle connector 42 can be pre-connected and temporarily fixed to one side module through the connecting steel bar 43 on one side before the module is hoisted. After the adjacent two-side modules are installed in place at the construction site, the middle connector 42 is rotated until the connecting holes 423 on the other side are vertically corresponding to the vertical through holes 411, and then the connecting steel bar 43 on the other side is passed through. Thus, the adjacent precast wall bodies on the left and right sides can be connected by the connection assembly 4. The connection assembly 4 can also serve as structural steel bars, so there is no need to install additional steel bars in the cast-in-place area 3, and the construction process is simpler and easier, effectively reducing the on-site construction volume.

[0027] As Figure 10 and Figure 11 As shown, the construction method of the assembled and synthesized building system of the present invention includes the following steps: 1. Prefabricate the independent unit module 1 and corridor module 2 in the factory. The unit module 1 and corridor module 2 are embedded with the embedded parts 41 on the precast wall body on the side connected to the cast-in-place area 3. After vertically aligning the connecting holes 423 on one side of the middle connector 42 with the vertical through holes 411 of the embedded parts 41 on one side of the precast wall body, pass the connecting steel bar 43 through the vertical through hole 411 and the connecting hole 423, and then turn the middle connector 42 to be close to this side of the precast wall body and temporarily fix it; 2. Pour concrete in the in-situ casting area 3 on the (N - 1)-th floor and the in-situ cast floor area 8 on the top of the corridor module 2, and apply a cement mortar cushion layer 9 on the top of the building on the (N - 1)-th floor to make the floor surface flat; 3. Install the unit module 1 and the corridor module 2 on the N-th floor to the set positions; 4. After rotating the middle connector 42 installed on the precast wall of the module on the N-th floor to make its other connecting hole 423 vertically aligned with the vertical through hole 411 of the embedded part 41 on the other precast wall, pass the connecting steel bar 43 through the vertically aligned through hole 411 and the connecting hole 423 on the other side, so as to connect the adjacent two modules; 5. Bind the reserved exposed steel bars at the joint part 5 of the unit module 1 with the steel bars set on the top of the adjacent unit module 1 or the corridor module 2 to form the floor steel bars; 6. Bind the embedded mechanical and electrical wire pipeline boxes on the top of the corridor module 2; 7. Pour concrete in the in-situ casting area 3 on the N-th floor and the in-situ cast floor area 8 on the top of the corridor module 2; 8. After the pouring on the N-th floor is completed, apply a cement mortar cushion layer 9 at the top positions of the unit module 1 and the corridor module 2 on the N-th floor; 9. Install the unit module 1 and the corridor module 2 on the (N + 1)-th floor to the set positions.

[0028] Repeat the above steps until the roof to complete the construction of the main building body.

[0029] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An assembled and synthetic building system, comprising: a plurality of prefabricated unit modules (1), each unit module (1) comprising a wall and a roof slab; characterized in that: it further comprises a prefabricated corridor module (2), the corridor module (2) comprising a wall and a roof slab; the roof slab of the unit module (1) is a fully prefabricated reinforced concrete slab, the roof slab of the corridor module (2) is a semi-prefabricated concrete slab, and a cast-in-place area (3) is provided between the adjacent prefabricated walls of the adjacent unit module (1) and the corridor module (2) and between the adjacent prefabricated walls of two adjacent unit modules (1). Structural steel bars are provided in the adjacent prefabricated walls, and the two side walls are connected together by a connecting component (4). The corridor module (2) is connected to the adjacent unit module (1) by casting concrete in the cast-in-place area (3) and above the roof slab of the corridor module (2).

2. The assembled and synthetic building system according to claim 1, characterized in that: the thickness of the roof slab of the unit module (1) is 150 - 180 mm, the thickness of the roof slab of the corridor module (2) is 50 - 70 mm, the thickness of the cast-in-place area (3) is 100 - 150 mm, and the thickness of the prefabricated walls on both sides of the cast-in-place area (3) is 50 - 90 mm.

3. The assembled and synthetic building system according to claim 1, characterized in that, the connecting component (4) comprises: a plurality of rows of vertically arranged and exposed embedded parts (41), a middle connecting piece (42), and a vertical connecting steel bar (43) respectively embedded in the prefabricated walls on both sides of the cast-in-place area (3); a vertical through hole (411) is provided in the exposed part of the embedded part (41), and the embedded parts (41) on the prefabricated walls on both sides of the cast-in-place area (3) are horizontally corresponding one by one; the middle connecting piece (42) comprises: a plurality of intermediate connecting pieces (421) arranged vertically, and a vertical rod member (422) fixedly connected to the plurality of intermediate connecting pieces (421); two connecting holes (423) are provided on the left and right of the intermediate connecting piece (421) and are respectively vertically corresponding to the vertical through holes (411) on the embedded parts (41) on the two side prefabricated walls; the connecting steel bar (43) passes through the corresponding connecting holes (423) and vertical through holes (411) to connect the embedded parts (41) and the middle connecting piece (42) on the two side prefabricated walls together.

4. The assembled and synthetic building system according to claim 3, characterized in that: the embedded part (41) is a steel sheet or a steel ring partially embedded in the prefabricated wall, and the parts of each row of embedded parts (41) embedded in the wall are connected together by vertical steel bars; the vertical rod member (422) passes through the central holes opened between the two connecting holes (423) on the left and right of each intermediate connecting piece (421) and is fixedly welded to the intermediate connecting piece (421).

5. The assembled and synthetic building system according to claim 1, characterized in that: The unit module (1) and the corridor module (2) further include a precast bottom plate. The bottom plate of the unit module (1) has a thickness of 60 - 80 mm. The lower part of the bottom plate of the corridor module (2) is a reinforced concrete slab with a thickness of 60 - 80 mm, and the upper part is a precast floor tile finish.

6. The assembled composite building system according to claim 1, characterized in that: At the joint of the top plate of the unit module (1) and the adjacent unit module (1), there is a concave connecting part (5). The connecting part (5) is a semi-precast plate structure and has exposed steel bars reserved. By connecting the reserved exposed steel bars of the connecting part (5) with the reserved exposed steel bars arranged at the edge of the top plate of the adjacent unit module (1) and casting concrete above the connecting part (5), the top plates of the adjacent unit modules (1) are connected together.

7. The assembled composite building system according to claim 1, characterized in that: The top surface of the top plate of the corridor module (2) is lower than the top surface of the top plate of the unit module (1). The left and right sides of the top plate of the corridor module (2) are thinner than the middle part. Above the left and right sides of the top plate of the corridor module (2) are the positions of the structural beams and there are beam precast steel bars (6) provided.

8. A construction method of the assembled composite building system according to claim 1, characterized in that it includes the following steps: Step 1: Prefabricate the independent unit module (1) and corridor module (2) in the factory; Step 2: Install the unit module (1) and the corridor module (2) to the set positions on the cleaned floor surface. There are gaps between the adjacent unit module (1) and corridor module (2) and between the adjacent two unit modules (1) as the cast-in-place areas (3); Step 3: Connect the adjacent modules with the connecting components (4), including connecting the adjacent unit modules (1) and the adjacent unit module (1) and corridor module (2), and tying the floor steel bars on the top of the corridor module (2); Step 4: Pour concrete in the cast-in-place area (3) and on the top of the corridor module (2) to form the structural wall and floor slab.

9. The construction method of the assembled composite building system according to claim 8, characterized in that The connecting component (4) includes: multiple columns of vertically arranged and exposed embedded parts (41) respectively embedded in the precast walls on both sides of the cast-in-place area (3), a middle connecting piece (42) composed of a vertical rod (422) and multiple vertically arranged intermediate connecting pieces (421) fixed to the vertical rod (422), and a vertical connecting steel bar (43); There are left and right connecting holes (423) on the intermediate connecting piece (421) and they are vertically corresponding to the vertical through holes (411) arranged on the embedded parts (41) on the precast walls on both sides respectively; The step of connecting the adjacent modules with the connecting component (4) in Step 3 includes the following steps: a. First, pass the connecting steel bar (43) through the vertical through hole (411) of the embedded part (41) on the precast wall of one side module and the corresponding connecting hole (423) on one side of the middle connecting piece (42), and rotate the middle connecting piece (42) around the connecting steel bar (43) to be close to this side module; b. After the adjacent side modules are installed in place, rotate the middle connecting member (42) so that the connecting hole (423) on its other side is vertically aligned with the vertical through hole (411) of the embedded part (41) of the precast wall on the other side, and then pass the connecting steel bars (43) through the connecting hole (423) and the vertical through hole (411) on the other side to connect the two precast walls together.

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