A concrete modular building and method of construction thereof

Abstract

The application relates to the technical field of building, and discloses a concrete modular building, a composite shear wall of which comprises two prefabricated wallboards arranged at opposite side walls of horizontally adjacent module boxes, a wall body reinforcing component and a hidden column reinforcing component are arranged in a pouring cavity formed by the two prefabricated wallboards, a stress steel pipe is arranged in the hidden column reinforcing component; connecting reinforcing rods are arranged between upper and lower composite shear walls, the bottom surface of the stress steel pipe of the upper composite shear wall is welded with the top surface of the stress steel pipe of the lower composite shear wall; and a construction method of the concrete modular building is also disclosed, the stress steel pipe of the upper layer is welded with the stress steel pipe of the lower layer on the lower composite shear wall, and the module box of the upper layer and the upper composite shear wall are installed; the prefabricated wallboards in the application jointly participate in structure stress, the stress steel pipe is arranged in the hidden column reinforcing component, the bearing capacity and the anti-seismic performance of the composite shear wall are improved, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a modular concrete building and its construction method. Background Technology

[0002] Modular concrete construction refers to breaking down a building into highly standardized box-like modular units according to room function and floor plan. These modular units are then precisely manufactured in a factory, integrating their structure, electromechanical piping, and interior decoration. They are then transported to the construction site and assembled quickly and efficiently. Shear walls are crucial load-bearing components of a building structure, needing to withstand wind loads and seismic forces. Therefore, the design and connection structure of shear walls in modular concrete construction are core technologies. Common practices in modular concrete construction include prefabricated shear wall formwork that does not participate in load-bearing, pre-reserved concrete sections at the bottom of the shear wall for later pouring of connection sections, and direct extension of reinforcing steel bars through non-contact lap joints within the modular box.

[0003] The main shortcomings of current conventional practices are: 1. The precast shear wall formwork (precast wall panel) on the modular box does not participate in the load-bearing and is only used as a construction formwork. During the construction process, the thickness of the precast shear wall formwork is not included in the specified concrete thickness when pouring concrete, which leads to an increase in wall thickness, an increase in structural self-weight and a reduction in internal usable area, resulting in material waste and poor economic efficiency. At the same time, during the construction process, all the steel bars of the shear wall need to be tied on site, which requires a lot of manpower and material resources, consumes a lot of time, and has seriously low production efficiency.

[0004] 2. To connect the shear walls of adjacent modular shear walls, in actual projects, a portion of the bottom of the existing modular shear walls is often left unpoured after the steel reinforcement is tied and concrete is poured in the factory. This unpoured portion is then transported to the construction site, where the connecting steel reinforcement is tied before the side formwork is sealed and concrete is poured a second time. This complex construction method increases the difficulty of factory fabrication of the modular boxes, reducing integration and integrity. Furthermore, the concrete for the pre-reserved connection section at the bottom of the shear wall needs to be poured from the side, which is difficult to construct and results in poor compaction of the concrete, affecting quality. Moreover, excess concrete at the pouring point needs to be mechanically removed later, resulting in significant waste of manpower and resources. In addition, the decoration and electromechanical wiring of the modular boxes also need to be installed in two stages, leading to a large amount of on-site work, which contradicts the concept of rapid construction of modular buildings. Furthermore, the secondary on-site installation may lead to differences in appearance, thus affecting the building's quality.

[0005] 3. In practical engineering, existing modular concrete buildings mostly use lap splicing methods where longitudinal reinforcement bars extend directly out of the module box. The connection between adjacent shear walls on different floors of the module box uses non-contact lap splicing of reinforcement bars, reducing the load-bearing capacity of the connection nodes. Current concrete design codes do not allow non-contact lap splicing of longitudinal reinforcement bars for tension shear walls, which hinders the widespread application of modular concrete buildings in high-rise and complex structures. Furthermore, the lap splicing of reinforcement bars extending directly out of the module box further increases the size of the module unit, negatively impacting transportation efficiency. Simultaneously, due to limitations in the installation operation area, existing lap splicing connection methods significantly increase the difficulty of module box construction, especially high-altitude hoisting and alignment on the construction site, hindering the realization of the rapid construction advantages of modular buildings. Summary of the Invention

[0006] The purpose of this invention is to provide a modular concrete building and its construction method, in which precast wall panels participate in structural stress, and a continuous load-bearing steel pipe is set inside the hidden column reinforcement assembly, thereby improving the bearing capacity and seismic performance of the composite shear wall and increasing construction efficiency.

[0007] To achieve the above objectives, the present invention provides a modular concrete building, comprising modular boxes and a composite shear wall disposed between two horizontally adjacent modular boxes. The composite shear wall includes two symmetrically arranged precast wall panels, which are respectively disposed on the opposing sidewalls of the two horizontally adjacent modular boxes. The two precast wall panels enclose a casting cavity, which is filled with concrete. The casting cavity contains wall reinforcement components and concealed column reinforcement components located on both sides of the wall reinforcement components. Both the wall reinforcement components and the concealed column reinforcement components... Partially embedded in the precast wall panel, the inner cavity of the concealed column reinforcement assembly is provided with a load-bearing steel pipe. The top surface of the load-bearing steel pipe is higher than the top surface of the casting cavity, and the bottom surface of the load-bearing steel pipe is lower than the bottom surface of the casting cavity. Connecting steel bars connect the upper and lower layers of the composite shear wall. The lower end of the connecting steel bar is connected to the top of the casting cavity of the lower layer of the composite shear wall, and the upper end of the connecting steel bar is connected to the bottom of the casting cavity of the upper layer of the composite shear wall. The bottom surface of the load-bearing steel pipe on the upper layer of the composite shear wall is welded to the top surface of the load-bearing steel pipe on the lower layer of the composite shear wall.

[0008] As a preferred embodiment of the present invention, the wall reinforcement assembly includes horizontal wall stirrups partially embedded in the precast wall panel and longitudinal wall reinforcement connected to the horizontal wall stirrups; the concealed column reinforcement assembly includes concealed column horizontal stirrups partially embedded in the precast wall panel and concealed column longitudinal reinforcement connected to the concealed column horizontal stirrups; a plurality of the horizontal wall stirrups are arranged in a matrix and embedded in the precast wall panel, and the horizontal wall stirrups on two precast wall panels are staggered vertically; the concealed column horizontal stirrups are arranged in a matrix and embedded in the precast wall panel, and the concealed column horizontal stirrups on two precast wall panels are staggered vertically.

[0009] As a preferred embodiment of the present invention, both the longitudinal reinforcement of the wall and the longitudinal reinforcement of the concealed column are inverted U-shaped continuous reinforcement bars.

[0010] As a preferred embodiment of the present invention, the longitudinal reinforcing bars of the wall are installed in the overlapping area of ​​the horizontal stirrups of the wall on the two precast wall panels; the longitudinal reinforcing bars of the concealed column are installed in the overlapping area of ​​the horizontal stirrups of the concealed column on the two precast wall panels.

[0011] As a preferred embodiment of the present invention, the outer periphery of the stressed steel pipe is provided with a plurality of circumferential stirrups at intervals along its length.

[0012] In a preferred embodiment of the present invention, the length of the connecting steel pipe is equal to the length of the precast wall panel, and the top height of the connecting reinforcing bar is lower than the top height of the connecting steel pipe.

[0013] As a preferred embodiment of the present invention, the prefabricated wall panel includes a wall panel and connecting plates on both sides of the wall panel.

[0014] As a preferred embodiment of the present invention, the connecting steel bar is an inverted U-shaped steel bar.

[0015] In a preferred embodiment of the present invention, the connecting steel bar is connected to the horizontal stirrups of the wall.

[0016] The present invention also provides a construction method for the aforementioned modular concrete building, comprising the following steps: Step 1: After the concrete poured into the casting cavity of the lower composite shear wall reaches the qualified strength, weld the load-bearing steel pipe of the upper composite shear wall to the load-bearing steel pipe of the lower composite shear wall. Step 2: Pour a grout layer on top of the lower module box; Step 3: Hoist the two adjacent horizontal module boxes of the upper layer, align and fix the two adjacent horizontal module boxes of the upper layer with the two adjacent horizontal module boxes of the lower layer according to the design drawings; install the wall reinforcement components and hidden column reinforcement components in the upper layer composite shear wall, and pour concrete in the casting cavity in the upper layer composite shear wall. Step 4: Repeat steps 1 to 3 until the construction of the modular concrete building is completed.

[0017] Compared with existing technologies, the advantages of this invention's modular concrete building and its construction method are as follows: In this invention, the horizontal stirrups embedded in the precast wall panel are tied to the longitudinal reinforcement of the wall, and the horizontal stirrups embedded in the precast wall panel are tied to the longitudinal reinforcement of the hidden column. This reduces the amount of reinforcement tying work on the construction site, making the connection between the precast wall panel and the cast-in-place concrete in the pouring cavity firm. The precast wall panel not only serves as a construction template, but also participates in the structural stress, improving construction efficiency. It also makes full use of the precast wall panel, achieving economic savings and reducing the impact of the composite shear wall on the usable interior space of the building. To meet the rapid construction requirements of modular buildings, modular boxes can be fully manufactured in the factory and integrated with pipelines and decoration. The composite shear wall only needs to be poured with concrete in the casting cavity between two precast wall panels. There is no need to reserve a concrete connection section for the composite shear wall after pouring. This can significantly reduce the construction difficulty and speed up the construction, and avoid potential construction quality problems. The hidden column reinforcement assembly is equipped with a load-bearing steel pipe, and the top of the load-bearing steel pipe extends out to facilitate welding and extension with the load-bearing steel pipe of the upper composite shear wall, so as to realize the purpose of continuous load-bearing steel pipe in the modular concrete building; moreover, there are connecting steel bars between the upper and lower composite shear walls, which can further improve the overall connection reliability and structural stability between the composite shear walls, improve the load-bearing capacity and seismic performance of the composite shear walls, and is suitable for high-rise and super high-rise modular concrete buildings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] Figure 1 A structural schematic diagram of a modular concrete building provided by the present invention; Figure 2 A schematic cross-sectional view of the composite shear wall provided by the present invention; Figure 3 This is a structural schematic diagram of the module housing provided by the present invention; Figure 4 A schematic diagram of the structure of the prefabricated wall panel provided by the present invention; Figure 5 Schematic diagram of the wall reinforcement assembly and the concealed column reinforcement assembly provided by the present invention; Figure 6 A schematic diagram of the structure of the composite shear wall without precast wall panel concrete provided by the present invention; Figure 7A schematic diagram of the wall reinforcement assembly and load-bearing steel pipe provided by the present invention; Figure 8 This is a schematic diagram of the structure after the lower layer composite shear wall is installed according to the present invention. Figure 9 A schematic diagram of the structure after installing the upper-layer load-bearing steel pipe on the lower-layer composite shear wall provided by the present invention; Figure 10 This is a schematic diagram of the structure of installing an upper layer composite shear wall on a lower layer composite shear wall, as provided by the present invention. Figure 11 A schematic diagram of a structure in which concrete is poured into the casting cavity of an upper-layer composite shear wall provided by the present invention; In the figure, module box 1; grouting layer 11; composite shear wall 2; precast wall panel 21; casting cavity 22; wall reinforcement assembly 23; wall horizontal stirrups 231; wall longitudinal reinforcement 232; connecting reinforcement 233; hidden column reinforcement assembly 24; hidden column horizontal stirrups 241; hidden column longitudinal reinforcement 242; load-bearing steel pipe 243; circumferential stirrups 244. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1 to 11As shown, a preferred embodiment of the present invention provides a modular concrete building, comprising a modular box 1 and a composite shear wall 2 disposed between two horizontally adjacent modular boxes 1. The composite shear wall 2 includes two symmetrically arranged precast wall panels 21, which are respectively disposed on the opposing sidewalls of the two horizontally adjacent modular boxes 1. The two precast wall panels 21 enclose a casting cavity 22, into which concrete is poured. The casting cavity 22 contains wall reinforcement assemblies 23 and concealed column reinforcement assemblies 24 located on both sides of the wall reinforcement assemblies 23. The two sets of concealed column reinforcement assemblies 24 are located on both sides of the shear wall 2. Both the wall reinforcement assemblies 23 and the concealed column reinforcement assemblies 24 are partially embedded in the precast wall panels 21, and the concealed column reinforcement assemblies 24 are embedded in the concrete within the casting cavity 22. The hidden columns are formed inside, effectively improving the overall seismic performance of the composite shear wall 2. The inner cavity of the hidden column reinforcement assembly 24 is provided with a load-bearing steel pipe 243, that is, the load-bearing steel pipe 243 is set in the space between the horizontal stirrups 241 of the adjacent hidden columns. The top surface of the load-bearing steel pipe 243 is higher than the top surface of the casting cavity 22, and the bottom surface of the load-bearing steel pipe 243 is lower than the bottom surface of the casting cavity 22. The upper and lower layers of the composite shear wall 2 are connected by connecting steel bars 233. The lower end of the connecting steel bar 233 is connected to the top of the casting cavity 22 of the lower layer of the composite shear wall 2, and the upper end of the connecting steel bar 233 is connected to the bottom of the casting cavity 22 of the upper layer of the composite shear wall 2. The bottom surface of the load-bearing steel pipe 243 on the upper layer of the composite shear wall 2 is welded to the top surface of the load-bearing steel pipe 243 on the lower layer of the composite shear wall 2.

[0023] For example, such as Figures 2 to 4As shown, the wall reinforcement assembly 23 includes horizontal wall stirrups 231 partially embedded in the precast wall panel 21 and longitudinal wall reinforcement 232 connected to the horizontal wall stirrups 231. The concealed column reinforcement assembly 24 includes concealed column horizontal stirrups 241 partially embedded in the precast wall panel 21 and longitudinal concealed column reinforcement 242 connected to the concealed column horizontal stirrups 241. This can be understood as follows: the longitudinal wall reinforcement 232 is tied to the non-embedded portion of the horizontal wall stirrups 231, and the longitudinal concealed column reinforcement 242 is tied to the non-embedded portion of the concealed column horizontal stirrups 241. Both the horizontal wall stirrups 231 and the concealed column horizontal stirrups 241 are connected to the steel reinforcement within the precast wall panel 21. The reinforcing steel frame is tied together, and several horizontal stirrups 231 of the wall body are embedded in the precast wall panel 21 in a matrix arrangement. The horizontal stirrups 231 of the wall body on two precast wall panels 21 are staggered vertically. The horizontal stirrups 241 of the concealed column are also embedded in the precast wall panel 21 in a matrix arrangement. The horizontal stirrups 241 of the concealed column on two precast wall panels 21 are staggered vertically so that after the two precast wall panels 21 are assembled together, the opposing horizontal stirrups 231 of the wall body and the opposing horizontal stirrups 241 of the concealed column form an interlocking state, which can effectively avoid collision of horizontal stirrups during construction and installation, and improve the connection reliability of the wall body reinforcing steel assembly 23 and the concealed column reinforcing steel assembly 24. Specifically, the installation spacing of the horizontal stirrups 241 of the concealed column is smaller than the installation spacing of the horizontal stirrups 231 of the wall body, and the installation spacing of the longitudinal stirrups of the concealed column is smaller than the installation density of the longitudinal stirrups of the wall body. The concealed column can strengthen the weak part at the end of the composite shear wall 2, and improve the shear resistance, seismic resistance and deformation resistance. In this embodiment, both the longitudinal steel bars 232 of the wall and the longitudinal steel bars 242 of the concealed column are inverted U-shaped continuous steel bars, which enhance the shear and torsional resistance.

[0024] For example, such as Figure 2 As shown, the longitudinal reinforcing bars 232 of the wall body are installed in the overlapping area of ​​the horizontal stirrups 231 (i.e., two opposing horizontal stirrups 231) on the two precast wall panels 21; the longitudinal reinforcing bars 242 of the concealed column are installed in the overlapping area of ​​the horizontal stirrups 241 (i.e., two opposing horizontal stirrups 241) on the two precast wall panels 21, effectively fixing the longitudinal reinforcing bars and preventing displacement and deviation. Moreover, the double horizontal stirrups wrap around the longitudinal reinforcing bars, resulting in a stronger restraint effect and improving the overall stability of the wall body reinforcing bar assembly 23 and the concealed column reinforcing bar assembly 24 (reinforcing bar skeleton).

[0025] For example, such as Figure 5 As shown, the outer periphery of the stressed steel pipe 243 is provided with a plurality of circumferential stirrups 244 at intervals along its length direction. In order to improve the bonding effect between the stressed steel pipe 243 and the concrete, ensure that the stressed steel pipe 243 and the concrete are subjected to stress as a whole, and improve the structural deformation resistance and seismic performance.

[0026] Specifically, such as Figure 9As shown, the length of the connecting steel pipe is equal to the length of the precast wall panel 21, ensuring that the connecting steel pipe can be installed along the entire length of the overlapping shear walls 2 of the upper and lower adjacent concrete modular buildings, thereby improving the load-bearing capacity and seismic performance of the overlapping shear walls 2 of high-rise or super high-rise concrete modular buildings; the top height of the connecting steel bar 233 is lower than the top height of the connecting steel pipe, which facilitates the installation of two precast wall panels 21 in two horizontally adjacent module boxes 1 on the upper level.

[0027] In this embodiment, as Figure 2 As shown, the prefabricated wall panel 21 includes a wall panel and connecting plates on both sides of the wall panel. The prefabricated wall panel 21 is "[" shaped, which facilitates the connection of two opposing prefabricated wall panels 21, so that two horizontally adjacent module boxes 1 form a reliable and effective connection.

[0028] For example, the connecting steel bar 233 is an inverted U-shaped steel bar; specifically, the connecting steel bar 233 is connected to the horizontal stirrups 231 of the wall body, so that the two adjacent superimposed shear walls 2 are effectively connected, thereby improving structural safety.

[0029] like Figures 1 to 11 As shown, the present invention also provides a construction method for the aforementioned modular concrete building, comprising the following steps: Step 1: After the concrete poured into the casting cavity 22 on the lower layer composite shear wall 2 reaches the qualified strength, weld the load-bearing steel pipe 243 on the upper layer composite shear wall 2 to the load-bearing steel pipe 243 on the lower layer composite shear wall 2. Step 2: Pour the grout layer 11 on top of the lower module box 1; Step 3: Hoist the two adjacent horizontal module boxes 1 of the upper layer, and align and fix the two adjacent horizontal module boxes 1 of the upper layer with the two adjacent horizontal module boxes 1 of the lower layer according to the design drawings; install the wall reinforcement assembly 23 and the hidden column reinforcement assembly 24 in the upper layer composite shear wall 2, and pour concrete in the casting cavity 22 in the upper layer composite shear wall 2. Step 4: Repeat steps 1 to 3 until the construction of the modular concrete building is completed.

[0030] In summary, the horizontal stirrups 231 embedded in the precast wall panel 21 and the longitudinal steel bars 232 of the wall are tied together in this invention, and the horizontal stirrups 241 of the concealed column embedded in the precast wall panel 21 and the longitudinal steel bars 242 of the concealed column are tied together. This reduces the amount of steel bar tying work on the construction site, makes the connection between the precast wall panel 21 and the cast-in-place concrete in the pouring cavity 22 firm, and the precast wall panel 21 is not only used as a construction template, but can also participate in the structural stress, which improves the construction efficiency and makes full use of the precast wall panel 21, achieving economic savings and reducing the impact of the composite shear wall 2 on the usable interior space of the building. To meet the rapid construction requirements of modular buildings, the modular box 1 can be completely manufactured in the factory and integrated with pipelines and decoration. The composite shear wall 2 only needs to be poured with concrete in the casting cavity 22 between the two precast wall panels 21. There is no need to reserve a post-cast concrete connection section in the composite shear wall 2. On the construction site, there is no need to formwork from the side and pour concrete for a second time to pour the post-cast concrete connection section. This can significantly reduce the construction difficulty and speed up the construction, and avoid construction quality problems. The hidden column steel reinforcement component 24 is equipped with a load-bearing steel pipe 243, and the top of the load-bearing steel pipe 243 extends out to facilitate welding and extension with the load-bearing steel pipe 243 of the upper composite shear wall 2, so as to realize the purpose of continuous load-bearing steel pipe 243 in concrete modular buildings. Moreover, the upper and lower composite shear walls 2 are connected by connecting steel bars 233, which can further improve the overall connection reliability and structural stability between the composite shear walls 2, improve the load-bearing capacity and seismic performance of the composite shear wall 2, and is suitable for high-rise and super high-rise concrete modular buildings.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A modular concrete building, comprising modular boxes and a composite shear wall disposed between two horizontally adjacent modular boxes, characterized in that, The composite shear wall comprises two symmetrically arranged precast wall panels, which are respectively located on the opposing sidewalls of two horizontally adjacent modular boxes. The two precast wall panels enclose a casting cavity, which is filled with concrete. The casting cavity contains wall reinforcement components and concealed column reinforcement components located on both sides of the wall reinforcement components. Both the wall reinforcement components and the concealed column reinforcement components are partially embedded in the precast wall panels. The inner cavity of the concealed column reinforcement components is equipped with load-bearing steel. The top surface of the stressed steel pipe is higher than the top surface of the casting cavity, and the bottom surface of the stressed steel pipe is lower than the bottom surface of the casting cavity. A connecting steel bar connects the upper and lower layers of the composite shear wall. The lower end of the connecting steel bar is connected to the top of the casting cavity of the lower layer of the composite shear wall, and the upper end of the connecting steel bar is connected to the bottom of the casting cavity of the upper layer of the composite shear wall. The bottom surface of the stressed steel pipe on the upper layer of the composite shear wall is welded to the top surface of the stressed steel pipe on the lower layer of the composite shear wall.

2. The modular concrete building as described in claim 1, characterized in that, The wall reinforcement assembly includes horizontal stirrups partially embedded in the precast wall panel and longitudinal reinforcement connected to the horizontal stirrups. The concealed column reinforcement assembly includes concealed column horizontal stirrups partially embedded in the precast wall panel and longitudinal reinforcement connected to the concealed column horizontal stirrups. Several horizontal stirrups are arranged in a matrix and embedded in the precast wall panel, with the horizontal stirrups on two precast wall panels staggered vertically. The concealed column horizontal stirrups are arranged in a matrix and embedded in the precast wall panel, with the concealed column horizontal stirrups on two precast wall panels staggered vertically.

3. The modular concrete building as described in claim 2, characterized in that, Both the longitudinal reinforcement bars of the wall and the longitudinal reinforcement bars of the hidden column are inverted U-shaped continuous steel bars.

4. The modular concrete building as described in claim 2, characterized in that, The longitudinal reinforcement bars of the wall are installed in the overlapping area of ​​the horizontal stirrups of the wall on the two precast wall panels; the longitudinal reinforcement bars of the concealed column are installed in the overlapping area of ​​the horizontal stirrups of the concealed column on the two precast wall panels.

5. The modular concrete building as described in claim 1, characterized in that, The outer periphery of the stressed steel pipe is provided with multiple circumferential stirrups at intervals along its length.

6. The modular concrete building as described in claim 1, characterized in that, The length of the connecting steel pipe is equal to the length of the precast wall panel, and the top height of the connecting steel bar is lower than the top height of the connecting steel pipe.

7. The modular concrete building as described in claim 1, characterized in that, The prefabricated wall panel includes the wall panel and connecting plates on both sides of the wall panel.

8. The modular concrete building as described in claim 1, characterized in that, The connecting steel bars are inverted U-shaped steel bars.

9. The modular concrete building as described in claim 1, characterized in that, The connecting steel bars are connected to the horizontal stirrups of the wall.

10. A construction method for a modular concrete building according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: After the concrete poured into the casting cavity of the lower composite shear wall reaches the qualified strength, weld the load-bearing steel pipe of the upper composite shear wall to the load-bearing steel pipe of the lower composite shear wall. Step 2: Pour a grout layer on top of the lower module box; Step 3: Hoist the two adjacent horizontal module boxes of the upper layer, align and fix the two adjacent horizontal module boxes of the upper layer with the two adjacent horizontal module boxes of the lower layer according to the design drawings; install the wall reinforcement components and hidden column reinforcement components in the upper layer composite shear wall, and pour concrete in the casting cavity in the upper layer composite shear wall. Step 4: Repeat steps 1 to 3 until the construction of the modular concrete building is completed.

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