Modular building system with high modularization degree and reliable connection between modules

Abstract

The invention discloses a modular building system which is high in modularization degree and reliable in connection between modules, prefabricated shear walls are arranged at the corners of module units, the upper edges of the prefabricated shear walls are connected with prefabricated beams, cast-in-place abutted seams are arranged between the adjacent prefabricated shear walls and between the adjacent prefabricated beams, and the prefabricated shear walls and the prefabricated beams are connected through pull rods. L-shaped prefabricated shear walls are symmetrically arranged at the connecting positions of only left and right adjacent module units, linear prefabricated shear walls and L-shaped prefabricated shear walls are arranged at the connecting positions of the front, rear, left and right module units, and first local cast-in-place areas are arranged on the outer sides of the connecting positions of short limbs and long limbs of the L-shaped prefabricated shear walls; a second local cast-in-place area is arranged on the outer side of the linear prefabricated shear wall, and a third local cast-in-place area is arranged on the outer side of the upper edge of the prefabricated beam. The modular degree is high, the on-site construction procedure is simplified, the construction efficiency is improved, standardized design can be better achieved, large-scale production and on-site assembly are facilitated, and the building industrialization level is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of modular buildings, and particularly relates to a modular building system with a high degree of modularization and reliable connections between modules. Background Art

[0002] With the rapid development of urbanization and rural urbanization, traditional building methods have problems such as large construction volume, high resource consumption, and high emissions. Building industrialization has become an inevitable trend. A modular building is composed of prefabricated standardized volume units of room size, usually manufactured in a factory and assembled on-site after production. As an important form of new building industrialization, it not only has a high degree of industrialization and standardization, but also has advantages such as fast construction speed, controllable quality, and environmental sustainability, and is widely used in many countries and regions.

[0003] However, it is difficult to form effective connections between the module units of current modular buildings, resulting in a significant weakening of the overall performance of the modular building system. Therefore, current modular buildings are mainly used for mid- and low-rise buildings, with limited applications in high-rise buildings, and mostly adopt hybrid structures or steel structures, and cannot achieve fully modular construction. In addition, high-rise modular buildings still face many challenges in aspects such as structural design, module connection, and construction tolerances, such as complex connection node design, high construction accuracy requirements, difficult transportation and hoisting, and imperfect design and construction specifications, and urgent improvements and perfection are needed. In addition, we also hope that modular buildings have certain seismic performance, and under the action of horizontal seismic loads, the connection stiffness should not be too large (too large will cause a sudden change in structural stiffness, which is not conducive to seismic resistance).

[0004] For this reason, we have proposed a modular building system with a high degree of modularization and reliable connections between modules. Summary of the Invention

[0005] The purpose of the present invention is to provide a modular building system with a high degree of modularization and reliable connections between modules.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A modular building system with a high degree of modularization and reliable connections between modules, characterized in that: it includes at least one layer of module units arranged in a matrix alignment, precast shear walls are arranged at the corner positions of the module units, the precast shear walls include straight precast shear walls and L-shaped precast shear walls, the upper side of the precast shear walls is connected to precast beams, cast-in-place joints are provided between adjacent precast shear walls and connected by tension rods in a tension manner, cast-in-place joints are also provided between adjacent precast beams, and the plastic hinge regions of adjacent precast beams are connected by tension rods in a tension manner;

[0008] L-shaped precast shear walls are symmetrically arranged at the connection positions of module units adjacent only on the left and right, and the long limbs of the L-shaped precast shear walls are aligned left and right; at the connection positions of module units with four module units in the front, back, left, and right, symmetrically arranged straight precast shear walls and symmetrically arranged L-shaped precast shear walls are provided, and the short limbs of the straight precast shear walls and the L-shaped precast shear walls are aligned front and back;

[0009] A first partial cast-in-place area is provided on the outer side of the intersection position of the short limb and the long limb of the L-shaped precast shear wall, and part of the steel bars of the boundary members of the L-shaped precast shear wall extend into the first partial cast-in-place area. A second partial cast-in-place area is provided on the outer side of the corner position of the straight precast shear wall, and part of the steel bars of the straight precast shear wall extend into the second partial cast-in-place area. A third partial cast-in-place area is provided on the outer side of the upper edge of the precast beam, and part of the steel bars of the precast beam extend into the third partial cast-in-place area; the cast-in-place joints, the first partial cast-in-place area, the second partial cast-in-place area, and the third partial cast-in-place area are all cast in place on site.

[0010] A further technical solution of the present invention is that the wall panel below the precast beam of the module unit is an ALC wall panel. There is a connection gap between adjacent ALC wall panels, and the connection gap is filled with grout. A waterproof rubber strip is provided at the lower edge of the cast-in-place joint between adjacent precast beams for sealing, and the connection gap and the cast-in-place joint are separated by the waterproof rubber strip.

[0011] A further technical solution of the present invention is that the position where adjacent precast shear walls are connected by tensioning with tie rods is at the position equal to the height of the precast beam.

[0012] A further technical solution of the present invention is that the protective layer on the outer side of the precast shear wall at the position equal to the height of the precast beam becomes thinner, so that the width of the cast-in-place joint between the precast shear walls at the position equal to the height of the precast beam becomes wider.

[0013] A further technical solution of the present invention is that cast-in-place area stirrups are provided in the first partial cast-in-place area, the second partial cast-in-place area, and the third partial cast-in-place area.

[0014] A further technical solution of the present invention is that the top plate of the module unit is a composite top plate, and the composite top plate includes a precast top plate and a cast-in-place composite layer on the precast top plate. Bottom bars are provided in the precast top plate, and top bars are provided in the cast-in-place composite layer. Both the bottom bars and the top bars pass through the third partial cast-in-place area.

[0015] A further technical solution of the present invention is that a mortar bedding layer is provided between the top plate of the module unit and the bottom plate of the upper module unit, and the mortar bedding layer is laid in a full-coverage or perimeter-laying manner to splice the upper and lower module units together.

[0016] A further technical solution of the present invention is: at least one vertically-length embedded steel pipe is provided in the prefabricated shear wall, dowels are inserted into the embedded steel pipe, grouting material is filled in the embedded steel pipe, and the upper part of the dowels extends to the upper outside for insertion into the embedded steel pipe of the upper prefabricated shear wall for connection.

[0017] A further technical solution of the present invention is that a shear key and a positioning groove are respectively provided in the middle of the upper and lower ends of the prefabricated shear wall, the shapes of the shear key and the positioning groove are adapted to each other, and the shear key is inserted into the positioning groove when the upper and lower prefabricated shear walls are butt-jointed.

[0018] A further technical solution of the present invention is that during prefabrication in a factory, mounting holes are provided at the positions of the connecting rods of the prefabricated shear wall and the prefabricated beam.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The module units of the present invention are arranged with prefabricated shear walls and prefabricated beams, and cast-in-place joints are set between the prefabricated shear walls and prefabricated beams of adjacent module units to ensure the toughness of the connection between the module units. At the same time, the prefabricated shear walls and prefabricated beams of adjacent module units are connected by tension rods, and local cast-in-place areas are set at the connection nodes to cast the parts between them together to form a double wall and double beam structure with stable connection, and the integrity of the connection between the module units is good. It can be seen that the connection between the module units of the present invention ensures the connection toughness while ensuring the connection strength, the connection is more reliable, and the seismic performance is good. Due to the above-mentioned reliable connection, the modular building system does not need to set up more cast-in-place structures or rigid structures and other connecting structures for connection, which can better realize overall modularization and a high degree of modularization. This also simplifies the on-site construction process and improves construction efficiency. It can also better realize standardized design, facilitate large-scale production and on-site assembly, and improve the level of building industrialization.

[0021] (2) The present invention further configures the wall panels as ALC wall panels, which are light in weight and can reduce the weight of the module units, thereby reducing transportation and hoisting costs.

[0022] (3) The present invention further provides a structure of embedded steel pipes and inserted steel bars to connect the upper and lower prefabricated shear walls, so that the connection of the upper and lower module units is more reliable. The embedded steel pipes can enhance the lateral force resistance of the wall and improve the earthquake resistance.

[0023] (4) The modular building system of the present invention can be applied to high-rise modular buildings such as dormitories and residential buildings, and has a wide range of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a plan view of a module unit on the same layer in an embodiment of the present invention;

[0025] Figure 2 is a simplified schematic diagram of the upper and lower layer module units in the embodiments of the present invention;

[0026] Figure 3 is Figure 1 a plan schematic diagram of the specific structure of the connection node at B in;

[0027] Figure 4 is Figure 3 a sectional schematic diagram at D-D in;

[0028] Figure 5 is Figure 1 a plan schematic diagram of the specific structure of the connection node at A in;

[0029] Figure 6 is Figure 1 a sectional schematic diagram at C-C in.

[0030] Meanings of the reference numerals in the figure:

[0031] 100 - L-shaped precast shear wall; 101 - long limb; 102 - horizontal distribution steel bars; 103 - vertical distribution steel bars; 104 - shear key; 105 - tie bars; 106 - stirrups; 107 - short limb; 200 - straight precast shear wall; 300 - precast beam; 301 - longitudinal steel bars; 302 - beam stirrups; 400 - tie rod; 501 - first partial cast-in-place area; 502 - second partial cast-in-place area; 503 - third partial cast-in-place area; 504 - cast-in-place joint; 505 - connection gap; 506 - stirrups in the cast-in-place area; 507 - longitudinal steel bars in the cast-in-place area; 508 - waterproof rubber strip; 509 - grout layer; 510 - position at the same height as the precast beam of the cast-in-place joint between precast shear walls; 601 - embedded steel pipe; 602 - inserted steel bars; 603 - stud; 700 - floor slab; 800 - composite top slab; 801 - cast-in-place composite layer; 802 - precast top slab; 803 - bottom steel bars of the slab; 804 - top steel bars of the slab; 900 - ALC wall panel. Specific embodiments

[0032] The present invention will be further described below in conjunction with embodiments.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceeding", etc. are understood not to include the recited number, and "above", "below", "within", etc. are understood to include the recited number. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0036] Embodiment:

[0037] As Figures 1 to 6 shown is a modular building system with a high degree of modularity and reliable connections between modules. It includes at least one layer of module units arranged in a matrix alignment. The module units on the same layer are aligned front and back, left and right. When there are two or more layers of module units, the module units on the upper and lower layers are also aligned.

[0038] The module unit is a cuboid-shaped structure. The module unit is composed of a precast shear wall, a precast beam 300, a wall panel, a top plate, and a bottom plate 700. The wall panel is an ALC wall panel 900 (autoclaved lightweight aerated concrete partition wall panel). In other embodiments, the wall panel can be a precast wall panel; the top plate is a composite top plate 800, and the composite top plate 800 includes a precast top plate 802 and a cast-in-place composite layer 801 located above the precast top plate 802. The precast shear wall, the precast beam 300, the precast top plate 802, the ALC wall panel 900, and the bottom plate 700 are precast together in the factory. The precast shear wall includes a straight precast shear wall 200 and an L-shaped precast shear wall 100. The precast shear walls are arranged at the corner positions of the module unit. By arranging precast shear walls in the module unit, the seismic performance and other performances of the module unit can be enhanced. Horizontal bottom bars 803 are provided in the precast top plate 802, and horizontal top bars 804 are provided in the cast-in-place composite layer 801. Horizontal distribution bars 102, vertical distribution bars 103, stirrups 106, tie bars 105, etc. are arranged in the precast shear wall, and longitudinal bars 301, beam stirrups 302, etc. are arranged in the precast beam 300. In other embodiments, the precast top plate can be a fully precast plate. The upper side of the precast shear wall is connected to the precast beam 300, and the steel bars of the precast beam 300 are anchored into the precast shear wall for connection. The ALC wall panel 900 is arranged below the precast beam 300, and the top plate and the bottom plate 700 are arranged on the top surface and the bottom surface, thus combining into a module unit.

[0039] As Figure 1The schematic plan view of the modular building part is shown, and the module unit one, module unit two, module unit three, and module unit four in the figure are connected to each other. Cast-in-place joints 504 are provided between the precast shear walls of the adjacent module units in the front and back and left and right. At the same time, the adjacent precast shear walls are connected by tension rods 400 in a tension connection, and the position of the tension connection by the tension rods 400 is at the position equal to the height of the precast beam 300. Installation holes are reserved at the positions of the precast shear walls where the tension rods 400 are connected during prefabrication in the factory, and the tension rods 400 can pass through the installation holes for quick connection on site.

[0040] Cast-in-place joints 504 are also provided between the precast beams 300 of the adjacent module units in the front and back and left and right. At the same time, the adjacent module units in the front and back and left and right are connected by tension rods 400 in a tension connection between the plastic hinge regions of the precast beams 300. The plastic hinge region of the precast beam 300 is located at the end of the precast beam 300 connected to the precast shear wall. Installation holes are also reserved at the positions of the precast beams 300 where the tension rods 400 are connected during prefabrication in the factory, and the tension rods 400 can pass through the installation holes for quick connection on site.

[0041] The specific number of the tension rods 400 can be determined according to the actual engineering stress. Connecting the adjacent precast shear walls and precast beams 300 by the tension rods 400 can make the adjacent module units better connected together, and the integrity of the modular building is better.

[0042] Among them, L-shaped precast shear walls 100 are symmetrically arranged at the connection positions of the module units adjacent only on the left and right, such as Figure 1 the position A shown. The specific connection structure between the symmetrically arranged L-shaped precast shear walls 100 at this position is as shown in Figure 5 The long limbs 101 of the L-shaped precast shear walls 100 are aligned left and right. A first local cast-in-place area 501 is provided outside the intersection position of the short limb 107 and the long limb 101 of the L-shaped precast shear wall 100. Part of the stirrups 106 of the edge members of the L-shaped precast shear wall 100 extend into the first local cast-in-place area 501, and cast-in-place area stirrups 506 and cast-in-place area longitudinal bars 507 are arranged in the first local cast-in-place area 501. The cast-in-place area stirrups 506 connect the cast-in-place area longitudinal bars 507 and the stirrups 106 of the edge members. After on-site casting, the L-shaped precast shear walls 100 of the adjacent module units on the left and right will be cast into one body at the short limb 107 position, so that they can be stably connected together and the integrity of the modular building is improved.

[0043] At the connection positions of the four module units in the front, back, left, and right, left-right symmetric straight precast shear walls 200 and left-right symmetric L-shaped precast shear walls 100 are arranged, such as Figure 1 the position B shown. The specific connection structure at this position is as shown in Figure 3As shown, the short limb 107 of the L-shaped precast shear wall 100 is aligned with the short limb of the straight precast shear wall 200 front and back. At the outer side of the intersection position of the short limb 107 and the long limb 101 of the L-shaped precast shear wall 100 at this position, a first partial cast-in-place area 501 is still provided. Part of the stirrups 106 of the edge member of the L-shaped precast shear wall 100 extends into the first partial cast-in-place area 501. At the outer side of the corner position of the straight precast shear wall 200, a second partial cast-in-place area 502 is provided. Part of the stirrups 106 of the straight precast shear wall 200 extends into the second partial cast-in-place area 502. Cast-in-place area stirrups 506 and cast-in-place area longitudinal bars 507 are arranged in the second partial cast-in-place area 502. The cast-in-place area stirrups 506 connect the cast-in-place area longitudinal bars 507 and the stirrups 106 of the straight precast shear wall 200. After on-site casting, the four precast shear walls will be cast into one body at this position, so that they can be stably connected together, improving the integrity of the modular building.

[0044] As Figure 4 shown, in this embodiment, a third partial cast-in-place area 503 is provided on the outer side of the upper edge of the precast beam 300. The third partial cast-in-place area 503 extends along the length direction of the precast beam 300. Part of the beam stirrups 302 of the precast beam 300 extends into the third partial cast-in-place area 503. Cast-in-place area stirrups 506 are arranged in the third partial cast-in-place area 503. The bottom bars 803 of the precast roof slab 802 and the top bars 804 of the cast-in-place composite layer 801 both pass through the third partial cast-in-place area 503. The cast-in-place area stirrups 506 connect the beam stirrups 302, the bottom bars 803 and the top bars 804. After on-site casting, the two beams will be cast into one body, so that they can be stably connected together, improving the integrity of the modular building.

[0045] There is a connection gap 505 between adjacent ALC wall panels 900 in this embodiment. The connection gap 505 is filled with grouting material or cement mortar, or it can also be not grouted. The adjacent ALC wall panels 900 are connected together through the grouting material. A waterproof rubber strip 508 is provided at the lower side of the cast-in-place joint 504 between adjacent precast beams 300 for sealing. The connection gap 505 is separated from the cast-in-place joint 504 through the waterproof rubber strip 508. Cement mortar or grouting material is poured at the cast-in-place joint 504.

[0046] As Figure 6 shown, in this embodiment, the protective layer on the outer side of the precast shear wall at the position equal to the height of the precast beam 300 becomes thinner, so that the width of the cast-in-place joint between the precast shear walls at the position equal to the height of the precast beam 510 becomes wider, which is the same as the width of the cast-in-place joint 504 between the precast shear walls and the precast beam. The preferred width is 40 - 50 mm, so that they can be better connected together.

[0047] In this embodiment, at least one vertically-long embedded steel pipe 601 is provided in the prefabricated shear wall. Specifically, one embedded steel pipe 601 is arranged in the I-shaped prefabricated shear wall 200, and one embedded steel pipe 601 is arranged in the edge components at both ends of the L-shaped prefabricated shear wall 100, that is, two embedded steel pipes 601 are arranged. A plurality of studs 603 are welded along the length direction of the embedded steel pipe 601, and a dowel 602 is inserted into the embedded steel pipe 601. The dowel 602 may be full-length or not. The embedded steel pipe 601 is filled with grouting material. The upper part of the dowel 602 extends to the upper outside for insertion into the embedded steel pipe 601 of the upper prefabricated shear wall for connection. The upper and lower prefabricated shear walls are connected by the structure of the embedded steel pipe 601 and the dowel 602, so that the connection of the upper and lower module units can be more reliable.

[0048] In this embodiment, a shear key 104 and a positioning groove are respectively provided at the middle of the upper end and the lower end of the wall of the L-shaped prefabricated shear wall 100. The shapes of the shear key 104 and the positioning groove are adapted to each other. The cross-sectional size of the shear key 104 gradually decreases from bottom to top. The shape of the shear key 104 can be conical, diamond, etc. The shear key 104 can be made of a metal plate, and the lower end of the shear key 104 is anchored in the prefabricated shear wall. When the upper and lower L-shaped prefabricated shear walls 100 are butt-jointed, the shear key 104 is inserted into the positioning groove, so that the upper and lower L-shaped prefabricated shear walls 100 can be better aligned. In another embodiment, a corrugated pipe may be pre-buried in the middle of the upper end of the L-shaped prefabricated shear wall 100, and a vertical rib extending downward is arranged at a corresponding position of the lower end of the upper L-shaped prefabricated shear wall 100. When the upper and lower L-shaped prefabricated shear walls 100 are butt-jointed, the vertical rib is correspondingly inserted into the corrugated pipe, so that the upper and lower L-shaped prefabricated shear walls 100 can be accurately butt-jointed, and finally the corrugated pipe is filled with grouting material. The above structures can enhance the shear strength of the structure.

[0049] In this embodiment, a mortar layer 509 is provided between the top plate of the module unit and the bottom plate 700 of the upper module unit. The mortar layer 509 can be fully laid or laid all around to splice the upper and lower module units together.

[0050] During the construction of the modular building of this embodiment, the cast-in-place joints 504, the first partial cast-in-place area 501, the second partial cast-in-place area 502 and the third partial cast-in-place area 503 are cast together on site so that the module units are connected as a whole.

[0051] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All such modifications, substitutions or changes in various other forms made to the above structure of the present invention according to the above content of the present invention, in accordance with the common general technical knowledge and customary means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A modular building system with a high degree of modularity and reliable connection between modules, characterized by: The invention comprises at least one layer of module units aligned and arranged in a matrix manner, wherein prefabricated shear walls are arranged at the corner positions of the module units, wherein the prefabricated shear walls include straight-line prefabricated shear walls and L-shaped prefabricated shear walls, wherein the upper sides of the prefabricated shear walls are connected to prefabricated beams, and cast-in-place joints are arranged between adjacent prefabricated shear walls and connected by tension rods, and cast-in-place joints are also arranged between adjacent prefabricated beams, and plastic hinge areas of adjacent prefabricated beams are connected by tension rods; The L-shaped prefabricated shear walls are symmetrically arranged at the connection positions of the module units that are only adjacent to each other on the left and right, and the long legs of the L-shaped prefabricated shear walls are aligned on the left and right; the left-right symmetrical straight-line prefabricated shear walls and the left-right symmetrical L-shaped prefabricated shear walls are arranged at the connection positions of the four module units in the front, back, left and right directions, and the short legs of the straight-line prefabricated shear walls and the L-shaped prefabricated shear walls are aligned on the front and back directions; A first local cast-in-place area is provided on the outer side of the intersection of the short limb and the long limb of the L-shaped precast shear wall, and part of the steel bars of the edge components of the L-shaped precast shear wall extend into the first local cast-in-place area. A second local cast-in-place area is provided on the outer side of the I-shaped precast shear wall at the corner position, and part of the steel bars of the I-shaped precast shear wall extend into the second local cast-in-place area. A third local cast-in-place area is provided on the outer side of the upper side of the precast beam, and part of the steel bars of the precast beam extend into the third local cast-in-place area. The cast-in-place joint, the first local cast-in-place area, the second local cast-in-place area and the third local cast-in-place area are cast on site together.

2. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: The wall panels of the module unit arranged under the prefabricated beams are ALC wall panels, and there are connection gaps between adjacent ALC wall panels, and the connection gaps are filled with grouting material. Waterproof strips are arranged under the cast-in-place joints between adjacent prefabricated beams for sealing, and the connection gaps are separated from the cast-in-place joints by the waterproof strips.

3. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: The position where the adjacent prefabricated shear walls are connected to each other by the tension rods is at the same height as the prefabricated beams.

4. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: The protective layer on the outer side of the prefabricated shear wall at the same height as the prefabricated beam becomes thinner, so that the cast-in-place joints between the prefabricated shear walls at the same height as the prefabricated beam become wider.

5. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: Cast-in-place area stirrups are provided in the first local cast-in-place area, the second local cast-in-place area and the third local cast-in-place area.

6. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: The top plate of the module unit is a composite top plate, which includes a prefabricated top plate and a cast-in-place composite layer located above the prefabricated top plate. The prefabricated top plate is provided with bottom reinforcement, and the cast-in-place composite layer is provided with surface reinforcement. Both the bottom reinforcement and the surface reinforcement pass through the third local cast-in-place area.

7. The modular building system with high modularity and reliable connection between modules according to claim 6, characterized in that: A mortar layer is provided between the top plate of the module unit and the bottom plate of the module unit on the upper layer. The mortar layer is fully laid or laid all around to splice the upper and lower module units together.

8. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: The prefabricated shear wall is provided with at least one vertically-length embedded steel pipe, into which a dowel is inserted, and the embedded steel pipe is filled with grouting material. The upper part of the dowel extends to the upper outside for insertion into the embedded steel pipe of the prefabricated shear wall on the upper layer for connection.

9. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: The middle parts of the upper and lower ends of the prefabricated shear wall are respectively provided with a shear key and a positioning groove, the shapes of the shear key and the positioning groove are adapted to each other, and the shear key is inserted into the positioning groove when the upper and lower prefabricated shear walls are butt-jointed.

10. The modular building system with high modularity and reliable connection between modules according to claim 1, characterized in that: During prefabrication in a factory, mounting holes are provided at locations where the pull rods are connected to the prefabricated shear walls and the prefabricated beams.

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