Concrete modular building

Abstract

The concrete modular building comprises three kinds of concrete modules, in the same floor, every two first concrete modules are connected through a second concrete module, and every two second concrete modules are connected through a third concrete module; the first concrete module is a vertical module and comprises a multi-face wall body and a first prefabricated floor fixed to the top of the multi-face wall body, the second concrete module is a C-shaped horizontal module and comprises a second prefabricated floor and prefabricated beams fixed to the bottoms of the two oppositely-arranged side edges of the second prefabricated floor, and the third concrete module is a horizontal module in a straight line shape. Comprising a third prefabricated floor slab supported on the prefabricated beam; post-pouring areas are reserved between the first prefabricated floor slab and the second prefabricated floor slab, between the wall body and the prefabricated beam and between the second prefabricated floor slab and the third prefabricated floor slab to achieve fixed connection between adjacent concrete modules on the same layer, and grouting areas are reserved at the bottom of the wall body to achieve fixed connection with the wall body on the lower layer. The structure is simple, connection is convenient, and the demand for temporary supporting and wet operation is small.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated structures, and in particular to a concrete modular building. Background Art

[0002] With the development of prefabricated buildings, problems such as difficulty in alignment, difficulty in detecting grouting fullness, and low assembly rate have gradually emerged in the traditional construction method of prefabricated components plus on-site casting. Modular building structures can improve the above problems to a certain extent. They have the advantages of high degree of industrialization, good building quality, and fast construction speed. Therefore, they are gradually developing nowadays.

[0003] The structural system of modular buildings is mainly divided into two categories: steel structure module system and concrete module system. At present, domestic modular buildings are mainly steel structure modules, and the technology is relatively mature. They are mostly used to build apartments, hotels, schools, dormitories, residences, offices and other types of buildings. However, for multi-story buildings, other lateral resistance structures need to be introduced, such as frame support structures, shear walls or core tube structures, to improve the lateral resistance of the modular structural system.

[0004] Although the steel structure module system has many advantages in terms of rapid construction and cost saving, there are still some issues that cannot be ignored in terms of sound insulation, heat insulation, fire prevention, corrosion prevention, and initial cost. Therefore, the concrete module structure system has gradually attracted people's attention. However, the concrete module structure system technology is still imperfect, and there are certain problems with the existing box connection form. For example, the direct connection between the prefabricated walls of the modules leads to excessive thickness of the walls. The connection wall is poured on site through the formwork, which leads to the problem that the weak parts of the formwork are easily damaged and the steel bars need to be tensioned on site. Utility Model Content

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, the present invention provides a concrete modular building, which is equipped with a variety of different types of modules. The vertical modules of the shear wall-slab are connected by the horizontal modules of the beam-slab combination to form an overall common force. The present invention not only ensures the wall thickness and thus improves the economy, but also solves the problem of the need to tension steel bars during on-site construction and improves the assembly efficiency.

[0007] In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

[0008] The present disclosure provides a concrete modular building, comprising a plurality of first concrete modules, second concrete modules and third concrete modules. In the same floor, two adjacent first concrete modules are connected by the second concrete modules, and two adjacent second concrete modules are connected by the third concrete modules. Each concrete module comprises a concrete body and steel bars embedded in the concrete body.

[0009] The first concrete module is a vertical module, comprising a plurality of walls that are fixedly connected and a first prefabricated floor slab fixed on the top of the walls, and a first embedded part is respectively provided on the outer side of the top of each wall;

[0010] The second concrete module is a C-shaped horizontal module, comprising a second prefabricated floor slab and prefabricated beams fixed to the bottom of two opposite sides of the second prefabricated floor slab, and the beam ends of the prefabricated beams are provided with second embedded parts fixedly connected to the first embedded parts;

[0011] The third concrete module is a straight-line horizontal module, comprising a third prefabricated floor slab supported on the prefabricated beam;

[0012] Post-casting areas are reserved between the first prefabricated floor slab and the second prefabricated floor slab, between the wall and the prefabricated beam, and between the second prefabricated floor slab and the third prefabricated floor slab to achieve fixed connection between adjacent concrete modules on the same layer, and a grouting area is reserved at the bottom of the wall to achieve fixed connection with the lower wall.

[0013] In some embodiments, the first embedded part and the second embedded part are both I-beam steels, and the first embedded part and the second embedded part are connected by high-strength bolts.

[0014] In some embodiments, in the first concrete module, the lower surface of the first prefabricated floor slab is flush with the upper surface of the wall, and the top side of the wall is provided with wall side extending bars formed by extending the transverse steel bars in the wall out of the wall and bending them, and the wall side extending bars and the first embedded parts are both located at the wall-beam node; the top of the wall in the non-stirrup reinforcement densification area is provided with a first wall top extending bar formed by extending the vertical steel bars in the wall out of the wall, and the top of the wall in the stirrup reinforcement densification area is provided with a second wall top extending bar formed by extending the vertical steel bars in the wall out of the wall; a wall bottom grouting hole is reserved at the bottom of the wall in the non-stirrup reinforcement densification area and adjacent to each vertical steel bar in the wall, and a grouting sleeve is embedded at each vertical steel bar in the wall at the bottom of the wall in the stirrup reinforcement densification area.

[0015] In some embodiments, when the first concrete modules of the upper and lower layers are connected, the first wall top extending reinforcement located in the lower layer is inserted into a corresponding grouting hole at the bottom of the wall to achieve lap connection of the vertical steel bars in the wall in the non-stirrup reinforcement densification area, and the second wall top extending reinforcement located in the lower layer is inserted into a corresponding grouting sleeve to achieve mechanical connection of the vertical steel bars in the wall in the stirrup reinforcement densification area, and high-strength grouting material is poured into the grouting holes at the bottom of the wall and the grouting sleeves to achieve vertical connection of the first concrete modules of the upper and lower layers.

[0016] In some embodiments, the ends of the precast beams are further provided with beam end extending bars formed by extending the steel bars inside the beams out of the precast beams and bending them, and the beam end extending bars are overlap-connected with the wall side extending bars.

[0017] In some embodiments, the beam end outwardly extending reinforcement and the wall side outwardly extending reinforcement are both in a closed U-shape.

[0018] In some embodiments, each side edge where the first prefabricated floor slab is connected to the second concrete module is provided with a first slab side externally extending reinforcement formed by extending the slab reinforcement out of the first prefabricated floor slab and bending the reinforcement, and the first slab side externally extending reinforcement is located at the wall-slab node;

[0019] Second slab side outward extension bars formed by extending the slab reinforcement outward from the second prefabricated slab and bending the slab reinforcement bars are respectively provided on each side where the second prefabricated slab is connected to the second concrete module or the third concrete module;

[0020] Each side edge of the third prefabricated floor slab connected to the second concrete module is provided with a third slab side outwardly extending reinforcement formed by extending the inner slab reinforcement out of the third prefabricated floor slab and bending the reinforcement.

[0021] In some embodiments, each connected plate side outwardly extending reinforcement is overlapped.

[0022] In some embodiments, each of the plate side outwardly extending ribs is in a closed U-shape.

[0023] In some embodiments, the first concrete module, the second concrete module and the third concrete module are all fully prefabricated components.

[0024] The present disclosure has the following advantages:

[0025] (1) The walls, beams and slabs in the module are all prefabricated components, and the amount of on-site casting is relatively small.

[0026] (2) There are three types of prefabricated modules, and their structure is relatively simple, making them easy to produce.

[0027] (3) Prefabricated modules require fewer supports during assembly, which can shorten construction time and reduce construction costs.

[0028] (4) When pouring concrete at the prefabricated module nodes, less formwork is required, only side formwork is needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the plan layout of a concrete modular building provided in an embodiment of the present disclosure.

[0030] Figure 2 A three-dimensional schematic diagram of a first concrete module in a concrete modular building provided in an embodiment of the present disclosure.

[0031] Figure 3 A three-dimensional schematic diagram of a second concrete module in a concrete modular building provided in an embodiment of the present disclosure.

[0032] Figure 4 (a) to (c) are respectively the connection structure details of the nodes of the first concrete module and the second concrete module on the same floor and the 1-1 section view and the 2-2 section view therein.

[0033] Figure 5 Detailed drawing of the wall-to-wall connection structure in the first concrete module of the upper and lower floors.

[0034] Figure 6 A three-dimensional schematic diagram of a third concrete module in a concrete modular building provided in an embodiment of the present disclosure.

[0035] Figure 7 (a) to (c) are respectively the connection structure details of the nodes of the second concrete module and the third concrete module on the same floor and the 1-1 section view and the 2-2 section view therein.

[0036] Reference numerals:

[0037] 1. First concrete module; 11. Wall; 12. First embedded part; 13. Outer reinforcement on the wall side; 14. Grouting hole at the bottom of the wall; 15. Grouting sleeve; 16. Outer reinforcement on the top of the first wall; 17. First prefabricated floor slab; 18. Outer reinforcement on the side of the first slab; 19. Outer reinforcement on the top of the second wall;

[0038] 2. Second concrete module; 21. Precast beam; 22. Second embedded part; 23. Extended reinforcement at beam end; 24. Second precast floor slab; 25. Extended reinforcement at second slab side;

[0039] 3. The third concrete module; 31. The third precast floor slab; 32. The third slab side extension reinforcement;

[0040] 4. Stirrups. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, but cannot be understood as limiting the present application.

[0042] Reference below Figure 1-Figure 7 A concrete modular building according to an embodiment of the present disclosure is described.

[0043] See also Figure 1 A concrete modular building provided by an embodiment of the present disclosure is composed of vertical modules and horizontal modules. The vertical modules on the same floor are arranged at intervals, and the vertical modules are connected by C-shaped horizontal modules, and then the C-shaped horizontal modules are connected by I-shaped horizontal modules. The required apartment distribution is achieved by the combination of three modules. Specifically, a concrete modular building provided by an embodiment of the present disclosure includes a plurality of first concrete modules 1, second concrete modules 2 and third concrete modules 3. A second concrete module 2 is arranged between two adjacent first concrete modules 1, and a third concrete module 3 is arranged between two adjacent second concrete modules 2. Each module includes a concrete body and steel bars embedded in the concrete body; the first concrete module 1 is a vertical module, including a plurality of fixedly connected walls 11 and a first prefabricated floor slab 17 fixed to the top of the wall 11, and a first embedded part 12 is respectively provided on the outer side of the top of each wall 11; the second concrete module 2 is a C-shaped horizontal The module comprises a second precast floor 24 and precast beams 21 fixed to the bottom of the two opposite sides of the second precast floor 24, and the beam ends of the precast beams 21 are provided with second embedded parts 22 fixedly connected to the corresponding first embedded parts 12; the third concrete module 3 is a straight-line horizontal module, comprising a third precast floor 31 supported on the precast beams 21; post-casting areas are respectively reserved between the first precast floor 11 and the second precast floor 24, between the wall 11 and the precast beams 21, and between the second precast floor 24 and the third precast floor 31 to realize the fixed connection between the adjacent concrete modules on the same layer, and a grouting area is reserved at the bottom of the wall 11 to realize the fixed connection with the lower wall 11.

[0044] In some embodiments, see Figure 2 to Figure 5The first concrete module 1 is a vertical module, including four integrally formed walls 11 and a first precast slab 17 located on the top of the wall 11. The lower surface of the first precast slab 17 is flush with the upper surface of the wall 11, and the length of the first precast slab 17 extending into the wall 11 is not less than 50 mm. A wall side extending reinforcement 13 is provided on the top side of the wall 11, which is formed by extending the transverse reinforcement inside the wall out of the wall 11 and bending it. The wall side extending reinforcement 13 and the first embedded part 12 provided on the wall 11 are both located at the wall-beam node between the wall 11 and the precast beam 21 connected to the wall 11; a first wall top extending reinforcement 16 is provided on the top of the wall 11 in the non-stirrup densification area, which is formed by extending the vertical reinforcement inside the wall out of the wall 11, and part of the first wall top extending reinforcement 16 passes through the first precast slab 17 and the rest of the first wall The top external extension bars 16 do not pass through the first precast floor slab 17 (because the first precast floor slab 17 is supported on the top of the wall 11 but does not extend out of the wall 11, and the wall 11 is generally provided with two rows of vertical reinforcements along the wall thickness direction, therefore, one row of the first wall top external extension bars 16 will pass through the first precast floor slab 17, while the other row of the first wall top external extension bars 16 will directly extend out of the wall top and will not contact the first precast floor slab 17), and a first external extension bar 16 formed by extending the vertical reinforcement in the wall out of the wall 11 is provided at the top of the wall 11 in the area where the stirrups 4 are densely packed. The second wall top external extension bars 19, and part of the second wall top external extension bars 19 pass through the first precast floor slab 17, and the other second wall top external extension bars 19 do not pass through the first precast floor slab 17, and the spacing of the wall top external extension bars is consistent with the spacing of the vertical reinforcements in the wall; a wall bottom grouting hole 14 is reserved at the bottom of the wall 11 in the non-stirrup reinforcement densification area and adjacent to each vertical reinforcement in the wall, and a grouting sleeve 15 is pre-buried at each vertical reinforcement in the wall at the bottom of the wall 11 in the stirrup reinforcement 4 densification area. When the first concrete modules of the upper and lower layers are connected, The first wall top extension bar 16 located in the lower layer is inserted into a corresponding wall bottom grouting hole 14 to realize the lap connection of the vertical steel bars in the wall in the non-hoop reinforcement densification area, and the second wall top extension bar 19 located in the lower layer is inserted into a corresponding grouting sleeve 15 to realize the mechanical connection of the vertical steel bars in the wall in the hoop reinforcement densification area. The wall bottom grouting hole 14 and the grouting sleeve 15 together constitute the grouting area, and then high-strength grouting material is poured into the wall bottom grouting hole 14 and the grouting sleeve 15 to realize the wall-to-wall connection in the first concrete module 1 of the upper and lower layers. The first plate side extension bar 18 formed by extending the steel bars in the plate out of the first precast floor slab 17 and bending them is respectively provided on each side where the first precast floor slab 17 is connected to the second concrete module 2. The first plate side extension bar 18 is located at the wall-to-slab node of the wall 11 connected to the side of the first precast floor slab 17.

[0045] In some embodiments, see Figure 2 to Figure 4The second concrete module 2 is a C-shaped horizontal module, including an integrally formed second precast floor slab 24 and precast beams 21 at both ends of the bottom thereof. The lower surface of the second precast floor slab 24 is flush with the upper surface of the precast beam 21, and the second precast floor slab 24 extends into the precast beam 21 along the width direction of the precast beam 21 by a length of not less than 50 mm, so as to support the second precast floor slab 24 on the precast beam 21. Second slab side outriggers 25 formed by extending the steel bars in the slab outward from the second precast floor slab 24 and bending are respectively provided on each side edge where the second precast floor slab 24 is connected to the first concrete module or the third concrete module 3. Beam end outriggers 23 formed by extending the steel bars in the beam outward from the precast beam 21 and bending are provided at the beam end of the precast beam 21, and a second outrigger embedded part 22 is also provided at the beam end of the precast beam 21, and the beam end outriggers 23 and the second embedded part 22 are both located at the wall-beam node. In addition, a spacing is left between the outer edge of the second precast floor slab 24 and the outer edge of the first precast floor slab 17, and between the beam end of the precast beam 21 and the outer edge of the wall 11, so that the lap length requirements are met between the second slab side extending reinforcement 25 and the first slab side extending reinforcement 18, and between the beam end extending reinforcement 23 and the wall side extending reinforcement 13.

[0046] In some embodiments, see Figure 6 , Figure 7 The third concrete module 3 is a straight-line horizontal module, including a third precast slab 31, and each side edge of the third precast slab 31 is provided with a third slab side extending rib 32 formed by extending the inner slab steel bars outward from the third precast slab 31 and bending the third slab side extending rib 32 to form an overlap connection with the second slab side extending rib 25 of the second precast slab 24 adjacent thereto.

[0047] Furthermore, the walls, prefabricated floors and prefabricated beams in each module of this embodiment are preferably fully prefabricated components, and the floors can also be composite floors as required. The sides of the first prefabricated floor 17, the second prefabricated floor 24 and the third prefabricated floor 31 are all flat.

[0048] Furthermore, the wall side extended bars 13, the beam end extended bars 23 and the slab side extended bars (18, 25 and 32) are in a closed U-shape. More specifically, each extended bar is a closed structure at one end away from the edge of the concrete body. The extended length of each U-shaped extended bar should be set according to the lap length requirement. The extended length of the first wall top extended bar 16 meets the maximum lap length requirement of the vertical steel bars in the upper wall. The wall bottom grouting hole 14 is a circular hole with a diameter of 50 mm to 80 mm and a length slightly greater than the extended length of the first wall top extended bar 16.

[0049] Furthermore, the first embedded part 12 fixed to the wall side and the second embedded part 22 fixed to the end of the precast beam 21 are both I-shaped steels, and the first embedded part 12 and the second embedded part 22 are connected by high-strength bolts, so that the second concrete module 2 is preliminarily fixed to the first concrete module 1; then, the fixed connection between the first concrete module 1 and the second concrete module 2 is achieved by pouring concrete into the post-casting area between the first precast floor slab 17 and the second precast floor slab 24, and the post-casting area between the wall 11 and the precast beam 21.

[0050] In some embodiments, see Figure 4 and Figure 7 When assembling modules on the same floor, first fix the first concrete module 1, then hoist the second concrete module 2, place the plate end of the second concrete module 2 on the wall 11 of the first concrete module 1, connect the second embedded part 22 at the end of the precast beam 21 in the second concrete module 2 with the first embedded part 12 on the wall side of the first concrete module 1 through high-strength bolts, then overlap the beam end extended reinforcement 23 with the wall side extended reinforcement 13, and the first plate side extended reinforcement 18 with the second plate side extended reinforcement 25, tie the stirrups on site, and finally pour concrete in the post-casting area at the node to form a whole, so as to realize the connection between the first concrete module 1 and the second concrete module 2. After the connection of the second concrete module 2 is completed, place the toothed plate of the third concrete module 3 on the precast beam 21 of the second concrete module 2, overlap the second plate side extended reinforcement 25 with the third plate side extended reinforcement 32, and pour concrete in the post-casting area to form a whole, so as to realize the connection between the second concrete module 2 and the third concrete module 3.

[0051] See also Figure 5 When assembling the upper and lower modules, first lift the first concrete module 1 of the upper layer, align the wall bottom grouting hole 14 with the first wall top outrigger 16 of the lower first concrete module 1, lower it to the top of the lower first concrete module 1, and then pour high-strength grouting material on the grouting sleeve 15 and the wall bottom grouting hole 14 to achieve the connection between the upper and lower first concrete modules 1.

[0052] It can be understood that the embodiments of the present disclosure address the problems existing in the existing concrete module structure, separate the original box-shaped modules, and connect the various box-shaped modules through other modules to form a concrete modular building. Specifically, the embodiments of the present disclosure provide a concrete modular building, which is composed of horizontal modules and vertical modules. The horizontal modules are of two types: a C-shaped module consisting of two precast beams and a floor slab, and an I-shaped module consisting of only one floor slab; the vertical module is composed of multiple walls and a floor slab, and the floor slabs in the module are all located on the top of the wall. Between adjacent modules on the same floor, the wall and the precast beam are overlapped by the extended bars on both sides and connected by embedded bolts, and concrete is poured to form a whole common force; the precast plate is placed on the wall or precast beam, the extended bars on the plate side are overlapped and concrete is poured to form a whole common force. The upper and lower vertical modules are connected by overlapping the vertical steel bars in the grouting holes at the bottom of the wall and the vertical steel bar grouting sleeves at the hoop reinforcement densification area, so as to achieve force transmission. The concrete modular building of this embodiment has a simple structure, is easy to connect, requires less temporary support and wet work, and can significantly demonstrate the advantages of prefabricated structures in terms of economy, environmental protection, and efficiency.

[0053] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are only used for distinction and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present application. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present application.

Claims

1. A concrete modular building, characterized in that: It comprises a plurality of first concrete modules, second concrete modules and third concrete modules. In the same floor, two adjacent first concrete modules are connected by the second concrete modules, and two adjacent second concrete modules are connected by the third concrete modules. Each concrete module comprises a concrete body and steel bars embedded in the concrete body. The first concrete module is a vertical module, comprising a plurality of walls and a first prefabricated floor slab fixed on the top of the walls, and a first embedded part is respectively provided on the outer side of the top of each wall; The second concrete module is a C-shaped horizontal module, comprising a second prefabricated floor slab and prefabricated beams fixed to the bottom of two opposite sides of the second prefabricated floor slab, and the beam ends of the prefabricated beams are provided with second embedded parts fixedly connected to the first embedded parts; The third concrete module is a straight-line horizontal module, comprising a third prefabricated floor slab supported on the prefabricated beam; Post-casting areas are reserved between the first prefabricated floor slab and the second prefabricated floor slab, between the wall and the prefabricated beam, and between the second prefabricated floor slab and the third prefabricated floor slab to achieve fixed connection between adjacent concrete modules on the same layer, and a grouting area is reserved at the bottom of the wall to achieve fixed connection with the lower wall.

2. The concrete modular building according to claim 1, characterized in that: The first embedded part and the second embedded part are both I-shaped steels, and the first embedded part and the second embedded part are connected by high-strength bolts.

3. The concrete modular building according to claim 1, characterized in that: In the first concrete module, the lower surface of the first prefabricated floor slab is flush with the upper surface of the wall, and the top side of the wall is provided with wall side extending bars formed by extending the transverse steel bars in the wall out of the wall and bending them, and the wall side extending bars and the first embedded parts are both located at the wall-beam node; the top of the wall in the non-stirrup reinforcement densification area is provided with a first wall top extending bar formed by extending the vertical steel bars in the wall out of the wall, and the top of the wall in the stirrup reinforcement densification area is provided with a second wall top extending bar formed by extending the vertical steel bars in the wall out of the wall; a wall bottom grouting hole is reserved at the bottom of the wall in the non-stirrup reinforcement densification area and adjacent to each vertical steel bar in the wall, and a grouting sleeve is embedded at each vertical steel bar in the wall at the bottom of the wall in the stirrup reinforcement densification area.

4. The concrete modular building according to claim 3, characterized in that: When the first concrete modules of the upper and lower layers are connected, the first wall top extending reinforcement located in the lower layer is inserted into a corresponding grouting hole at the bottom of the wall to realize the lap connection of the vertical steel bars in the wall in the non-stirrup reinforcement densification area, and the second wall top extending reinforcement located in the lower layer is inserted into a corresponding grouting sleeve to realize the mechanical connection of the vertical steel bars in the wall in the stirrup reinforcement densification area, and high-strength grouting material is poured into the grouting holes at the bottom of the wall and the grouting sleeves to realize the vertical connection of the first concrete modules of the upper and lower layers.

5. The concrete modular building according to claim 3, characterized in that: The ends of the precast beams are also provided with beam end extending reinforcements formed by extending the steel bars inside the beams outward from the precast beams and bending them, and the beam end extending reinforcements are overlapped and connected with the wall side extending reinforcements.

6. The concrete modular building according to claim 5, characterized in that: The beam end outwardly extending reinforcement and the wall side outwardly extending reinforcement are both in a closed U shape.

7. The concrete modular building according to claim 1, characterized in that: Each side edge where the first prefabricated floor slab is connected to the second concrete module is provided with a first slab side outwardly extending reinforcement formed by extending the slab reinforcement outwardly from the first prefabricated floor slab and bending the reinforcement, and the first slab side outwardly extending reinforcement is located at the wall-slab node; Second slab side outward extension bars formed by extending the slab reinforcement outward from the second prefabricated slab and bending the slab reinforcement bars are respectively provided on each side edge where the second prefabricated slab is connected to the second concrete module or the third concrete module; Each side edge of the third prefabricated floor slab connected to the second concrete module is provided with a third slab side outwardly extending reinforcement formed by extending the inner slab reinforcement out of the third prefabricated floor slab and bending the reinforcement.

8. The concrete modular building according to claim 7, characterized in that: The connected side extension bars of the plates are connected by lap joints.

9. The concrete modular building according to claim 7, characterized in that: The outward extending ribs on each side of the plate are all in a closed U shape.

10. The concrete modular building according to any one of claims 1 to 9, characterized in that: The first concrete module, the second concrete module and the third concrete module are all fully prefabricated components.

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