Combined building structure and construction method thereof

Abstract

The invention discloses a combined building structure, and belongs to the technical field of building engineering. The combined building structure comprises a beam reinforcement cage, a column reinforcement cage, a prefabricated connector and a connecting sleeve, butt-joint steel bars of the prefabricated connector are in rigid connection with beam reinforcement cage composition steel bars or column reinforcement cage composition steel bars through the connecting sleeve, and the rigid connection is welded or bolted connection. Products formed by the structure are all standardized and modularized in design, construction procedures are obviously reduced, use is easy, a large amount of labor is saved, the total cost of the same building using the products is lower than the total cost of the same building of an existing mainstream building method wood pattern cast-in-place and fabricated building, and the market competitive advantage is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and in particular to a combined building structure and a construction method thereof. Background Art

[0002] With the development of the economy, people's requirements for housing are also increasing. The construction process of traditional steel-concrete frame houses is complicated, which is not only time-consuming and labor-intensive, but also wastes materials.

[0003] In this regard, the inventor has applied for a Chinese patent for a combined building beam, column, and shear wall reinforcement cage system (publication number CN222893857U), which includes a beam reinforcement cage, a column reinforcement cage, and a beam-column connector. The top of the column reinforcement cage is assembled with the bottom surface of the beam-column connector, the side of the beam-column connector is assembled with one end of the beam reinforcement cage, and the other end of the beam reinforcement cage is assembled with one end of another beam reinforcement cage or the side of the beam-column connector. The beam reinforcement cage and the column reinforcement cage are prefabricated and assembled, and a beam-column connector is designed at the connection between the beam reinforcement cage and the column reinforcement cage to facilitate the connection between the beam reinforcement cage and the column reinforcement cage, which can greatly save on-site construction time; however, the beam reinforcement cage, the column reinforcement cage, and the beam-column connector are spliced ​​with butt-jointed steel plates. The provision of the butt-jointed steel plates increases the prefabrication time of the beam reinforcement cage and the column reinforcement cage, and the connection of the beam and column reinforcement cages during construction is relatively cumbersome, the construction efficiency is low, the amount of steel used is high, and the cost is high. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a combined building structure and a construction method thereof, which has the advantages of high strength, simple construction, and low cost, and meets the requirements of current green buildings.

[0005] This application provides one of the technical solutions: a modular building structure, the nodes of which include a beam reinforcement cage, a column reinforcement cage, a prefabricated joint and a connecting sleeve, the butt-jointed steel bars of the prefabricated joint are respectively rigidly connected with the steel bars constituting the beam reinforcement cage or the steel bars constituting the column reinforcement cage through the connecting sleeve, and the rigid connection is a welding or bolt connection.

[0006] Furthermore, when the connecting sleeve is welded, staggered insertion holes are provided at both ends of the connecting sleeve, and welding openings are provided on the side walls of the connecting sleeve, which are used for staggered double-sided welding after the butt-jointed steel bars of the prefabricated joint and the steel bars of the beam steel cage or the steel bars of the column steel cage are inserted.

[0007] Furthermore, when the connecting sleeve is connected by bolts, through holes are provided at both ends of the connecting sleeve, threaded holes are provided on the side walls of the connecting sleeve, and locking screws are provided in the threaded holes.

[0008] Furthermore, the prefabricated joint is a square block cast with concrete reinforcement, the reinforcement extending from the side of the square block forms a butt reinforcement, and a reinforcing steel pipe extends from the center of the square block.

[0009] Furthermore, a pin hole is provided at the end of the reinforced steel pipe, and a pin is inserted into the pin hole.

[0010] Furthermore, the beam reinforcement cage, the column reinforcement cage and the butting reinforcement are evenly arranged with stirrups near the connecting sleeve and are tied and fixed by the stirrups.

[0011] Furthermore, the structure also includes a shear wall reinforcement cage, and the end reinforcements of the shear wall reinforcement cage are tied and fixed to the reinforcements of the column reinforcement cage, or tied and fixed to the end reinforcements of another shear wall reinforcement cage.

[0012] Furthermore, the structure also includes a template, which is respectively connected and fixed to the bottom and side of the beam reinforcement cage, and the side of the column reinforcement cage and the shear wall reinforcement cage.

[0013] The present application provides a second technical solution: a construction method for a modular building structure, comprising the following steps: Step 1, installing formwork on the beam reinforcement cage, column reinforcement cage and shear wall reinforcement cage, and reserving space for the connection sleeve position; Step 2, fixing the column reinforcement cage on the foundation, connecting the side of the column reinforcement cage to the shear wall reinforcement cage, installing a prefabricated joint on the top, and inserting the column reinforcement cage steel bars and the connecting reinforcement of the prefabricated joint at the installation position into the connecting sleeve for connection, and selecting the connecting sleeve according to the construction to form a rigid node; Step 3, hoisting the beam reinforcement cage, inserting the beam reinforcement cage steel bars and the connecting reinforcement of the prefabricated joint into the connecting sleeve for connection, and also selecting the connecting sleeve according to the construction to form a rigid node; Step 4, assembling multiple nodes until the connection of the overall beam, column and shear wall is completed, and filling the reserved space with formwork; Step 5, pouring concrete, forming a grouting port at the top of the modular formwork outside the column reinforcement cage and the shear wall reinforcement cage, and forming a grouting port for the beam reinforcement cage from the empty space at the top of the modular formwork.

[0014] Furthermore, when the construction building is a high-rise building, the steel cage steel bars are inserted into the connecting sleeve and the inserted connecting steel bars are staggered and double-sided welded to form a rigid connection; when the construction building is a high-rise building, the steel cage steel bars are inserted into the connecting sleeve and the inserted connecting steel bars are locked by the screws on the connecting sleeve.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: First, the main products are all standardized and modular in design, and are all mechanized and produced in factories, resulting in a low initial cost. Second, the main products can be combined into a unit cavity module of beams, columns, and shear walls on the ground at the construction site. Multiple unit cavity modules are connected to form the beam, column, and shear wall cavity modules of the entire building, and finally poured with concrete. The products and the cavity modules formed by the combination of products are light before the final pouring of concrete, making them easy to produce, transport, and use. Third, prefabricated joints, connecting sleeves, butt-jointed steel bars and other products are used to connect the steel cages, and then modular formwork is installed on the outside before pouring concrete. This is an innovation that does not deviate from the essence of cast-in-place construction of steel-concrete structures, where "internal steel bars bear tension and external concrete bears pressure." It is also a cast-in-place solid process, so the quality of the finished components meets industry standards. Fourthly, the amount of steel used in this product is not much higher than that of the commonly used and lower-cost construction method of cast-in-place wooden formwork. Moreover, because the products are all standardized and modular in design, the significant reduction in construction steps and the ease of use can save a lot of labor. The total cost of the same building using this product is lower than the total cost of the same building using the existing mainstream construction methods of cast-in-place wooden formwork and prefabricated buildings, which has a great low-cost advantage. Fifthly, the product does not need to be dismantled, saving labor costs and other expenses in the demolition work.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of a combined building structure.

[0019] Figure 2 It is a schematic diagram of the steel cage structure of the beam in a combined building structure.

[0020] Figure 3 It is a schematic diagram of the steel cage structure of the column in a combined building structure.

[0021] Figure 4 It is an enlarged view of the connecting sleeve in a modular building structure.

[0022] Figure 5 It is a schematic diagram of prefabricated joints of a modular building structure.

[0023] Figure 6It is a schematic diagram of a combined building structure dislocation welding sleeve.

[0024] Figure 7 It is a cross-sectional view of a dislocated welded sleeve of a combined building structure.

[0025] Figure 8 It is a cross-sectional view of a side locking sleeve of a modular building structure.

[0026] Figure 9 It is a schematic diagram of the general assembly of a combined building structure.

[0027] Figure numerals: 1. Beam reinforcement cage; 2. Column reinforcement cage; 3. Prefabricated joint; 31. Butt reinforcement; 32. Concrete body; 33. Reinforced steel pipe; 34. Pin hole; 35. Pin; 4. Connecting sleeve; 41. Offset welding method; 411. Insert hole; 412. Welding port; 42. Lateral locking method; 421. Through hole; 422. Threaded hole; 423. Locking screw; 43. Movable stirrup; 5. Shear wall reinforcement cage; 6. Formwork. DETAILED DESCRIPTION

[0028] Please refer to Figure 1-9 As shown, a modular building structure provided by the present invention includes a beam reinforcement cage 1, a column reinforcement cage 2, a prefabricated joint 3, and a connecting sleeve 4. The side and upper and lower end surfaces of the prefabricated joint 3 are provided with butt reinforcement 31. The end reinforcement of the beam reinforcement cage 1 is connected and fixed to the butt reinforcement 31 on the side of the prefabricated joint 3 through the connecting sleeve 4, or is connected and fixed to the end reinforcement of another beam reinforcement cage 1. The end reinforcement of the column reinforcement cage 2 is connected and fixed to the butt reinforcement 31 on the upper and lower end surfaces of the prefabricated joint 3 through the connecting sleeve 4.

[0029] Among them, when the beam reinforcement cage 1 and the column reinforcement cage 2 are prefabricated in the factory, they are standardized in design according to the construction requirements. The spacing dimensions of their longitudinal main reinforcements are required to be consistent, and the ends are flush. The butt reinforcement 31 on the prefabricated joint 3 is also prefabricated to correspond to its shape, size and spacing, so that the beam reinforcement cage 1, the column reinforcement cage 2 and the butt reinforcement 31 on the prefabricated joint 3 are connected and fixed more easily through the connecting sleeve 4, and the connection strength is higher.

[0030] The prefabricated joint 3 is a square block cast with concrete reinforcement. Specifically, the prefabricated joint 3 includes a concrete body 32, and the butt reinforcement 31 is embedded and fixed on the concrete body 32. A reinforcing steel pipe 33 is embedded and fixed in the concrete body 32. The ends of the reinforcing steel pipe 33 pass through the side and upper and lower end faces of the concrete body 32, and the interior of the reinforcing steel pipe 33 is interconnected.

[0031] Furthermore, the reinforcing steel pipes 33 can be divided into multiple models and multiple settings according to the size requirements of beams and columns, calculated according to the designed beams and columns, and prefabricated and embedded in the concrete body 32.

[0032] A pin hole 34 is formed at the end of the reinforcing steel pipe 33 , and a pin 35 is inserted into the pin hole 34 .

[0033] In actual application, after pouring concrete, the pins are buried in the concrete, so that an anchor-like structure is formed between the prefabricated joint 3 and the beam reinforcement cage 1 and the column reinforcement cage 2, thereby strengthening the connection strength between the concrete beam, concrete column and the prefabricated joint 3.

[0034] In an optional embodiment, the connecting sleeve 4 includes a staggered welding method 41 , with staggered insertion holes 411 provided at both ends of the staggered welding method 41 , and a welding opening 412 extending through the insertion holes 411 provided on the side wall.

[0035] When it is used, the steel bars to be connected are respectively inserted from the insertion holes 411 at both ends. After insertion, the sides of the two steel bars are in contact, and then the two steel bars are welded through the welding port 412 to complete the connection and fixation of the two steel bars. The scope of application of the staggered welding method 41 is for connecting steel bars with smaller diameters. The advantages are simple processing, easy installation, low cost, and suitable for low-rise buildings.

[0036] In another optional embodiment, the connecting sleeve 4 includes a lateral locking method 42, an axial through hole 421 is provided in the lateral locking method 41, and threaded holes 422 are provided at both ends to pass through the through hole 421, and the internal thread of the threaded hole 422 is matched with a locking screw 423.

[0037] When in use, the steel bars to be connected are respectively inserted into the through holes 421 at both ends, and then the locking screws 423 in the threaded holes 422 are tightened. The locking screws 423 press the two steel bars to achieve the connection and fixation of the two steel bars. The scope of application of the lateral locking method 41 is for connecting steel bars with larger diameters. Its advantages are high strength, simple construction, and low cost. It is suitable for high-rise buildings and large buildings.

[0038] The beam reinforcement cage 1, the column reinforcement cage 2 and the butt reinforcement 31 are evenly arranged with movable stirrups 43 near the connecting sleeve 4 and tied and fixed.

[0039] Among them, the movable stirrups 43 can be prefabricated into the same size and shape as the fixed stirrups on the beam reinforcement cage 1 and the column reinforcement cage 2, so that they can be directly installed on both ends of the beam reinforcement cage 1 and the column reinforcement cage 2 during assembly.

[0040] It also includes a shear wall reinforcement cage 5, and the end reinforcements of the shear wall reinforcement cage 5 are tied and fixed to the column reinforcement cage 2, or tied and fixed to the end reinforcements of another shear wall reinforcement cage 5.

[0041] It also includes a combined formwork 6, which is respectively connected and fixed to the bottom and side of the beam reinforcement cage 1, and the side of the column reinforcement cage 2 and the shear wall reinforcement cage 5.

[0042] Among them, the specific structure of the combined formwork 6 can refer to the formwork in a combined formwork building system (invention patent number: ZL202321349360.3). The combined formwork 6 installed at the beam reinforcement cage 1 corresponds to the beam side plate in the patent, and the beam reinforcement cage 1 corresponds to the beam reinforcement skeleton connected to the beam side plate in the patent; the combined formwork 6 installed at the column reinforcement cage 2 corresponds to the column plate in the patent, and the column reinforcement cage 2 corresponds to the reinforcement skeleton of the column connected to the column plate in the patent; the combined formwork 6 installed on the side of the shear wall reinforcement cage 5 corresponds to the wall panel in the patent, and the shear wall reinforcement cage 5 corresponds to the wall reinforcement skeleton connected to the wall panel in the patent; the specific structure of the combined formwork 6 and how to install and fix it have been introduced in detail in the patent and will not be repeated here.

[0043] During specific implementation, the dimensions of each section of beams and columns are determined according to the design drawings, and products such as beam reinforcement cage 1, column reinforcement cage 2, shear wall reinforcement cage 5, combined formwork 6 and prefabricated joints 3 are manufactured in the factory according to their dimensions. First, the combined formwork 6 is installed on the beam reinforcement cage 1, column reinforcement cage 2 and shear wall reinforcement cage 5. When installing the combined formwork 6, pay attention to leaving space at the ends of the combined formwork 6 from the beam reinforcement cage 1 and the column reinforcement cage 2, which is the reserved space for installing the connecting sleeve 4. Then, the column reinforcement cage 2 is fixed on the foundation, and the side of the column reinforcement cage 2 is connected to the shear wall reinforcement cage 5. The prefabricated joint 3 is installed above the column reinforcement cage 2. The main reinforcement end of the column reinforcement cage 2 and the butt reinforcement 31 below the prefabricated joint 3 are inserted into the reserved space of the connecting sleeve 10 for connection. For example, the side locking method 41 is used for fixing in high-rise building construction, and the staggered welding method 41 is used for window welding in low-rise building construction. Then, the beam reinforcement cage 1 is hoisted by a crane or other machinery so that the beam reinforcement cage 1 and the prefabricated joint 3 are connected to each other. After the connection and assembly of the entire beam, column and shear wall are completed, the space reserved for the modular formwork 6 needs to be filled with formwork, and finally, concrete is poured. Concrete is injected from the grouting port reserved at the top of the modular formwork 6 outside the column reinforcement cage 2 and the shear wall reinforcement cage 5. The concrete of the beam reinforcement cage 1 is injected from the empty space of the modular formwork 6 at its top. Generally, when the modular formwork 6 of the beam reinforcement cage 1 is assembled, the entire surface of the top position is left empty.

[0044] The remarkable effects of the present invention are: The first is to redefine the functions and uses of construction products in the field of construction engineering technology.

[0045] The present invention proposes for the first time the functions and uses of two new products, namely "prefabricated joints" and "unit cavity modules", in the construction of steel-concrete structures.

[0046] 1. "Precast joints" are prefabricated reinforced concrete components, factory-fabricated with steel-concrete components that essentially match the size and quantity of reinforcement in the building's original design. They are a crucial node in the entire modular building structure and its construction method. Their application ensures a highly reliable, simple, and cost-effective connection between beam and column cages.

[0047] 2. "Unit Cavity Modules" are hollow, concrete-free components composed of a steel cage, formwork, precast joints, and connecting sleeves. They are lightweight and easy to manufacture, transport, and use. They are assembled on the construction site using modular formwork, modular steel cages, precast joints, and connecting sleeves to form a "unit cavity module" of beams, columns, and shear walls. Multiple "unit cavity modules" are then connected and concrete poured to complete the construction of the beams, columns, and shear walls on a single floor of a building.

[0048] Second, it has major technological innovations.

[0049] "Prefabricated joint", "unit cavity module" and "sleeve dislocation welding technology" are three innovative points in the present invention.

[0050] 1. "Precast joints" are prefabricated reinforced concrete components, prefabricated in the factory and designed to match the original building design with the same steel bar size and quantity. They represent a key milestone and a major technological innovation of this invention. They ensure a highly reliable, simple, and cost-effective connection between the beam and column cages.

[0051] 2. The "unit cavity module" is composed of a steel cage, formwork, "prefabricated joints", connecting sleeves and other connectors. It is a hollow component without concrete. It is light in weight and easy to produce, transport and use.

[0052] 3. "Sleeve offset welding technology" is an innovatively designed offset welding connection sleeve. The corresponding butt-jointed steel bar interface is offset and inserted into the steel connecting sleeve, and the offset welding joint is connected by double-sided electric welding. It is suitable for connecting smaller diameter steel bars, and has the advantages of simple processing, convenient installation, and low cost. It is suitable for low-rise buildings such as rural housing. Another lateral locking sleeve of the present invention is to insert the connecting sleeve into the butt-jointed steel bar, and tighten the multiple lateral locking screws at both ends of the steel sleeve to fix it to achieve connection. It is suitable for connecting larger diameter steel bars, and has the advantages of high strength, simple construction, and low cost. It is suitable for high-rise buildings and large buildings. The two sleeves can realize the high and low matching of the use of the connecting sleeve, and have a wide range of applications.

[0053] Products such as modular formwork, modular reinforcement cages, precast joints, and connecting sleeves are all mechanized and manufactured in the factory before being transported to the construction site and assembled into unit cavity modules for beams, columns, and shear walls. Multiple unit cavity modules are then connected and concrete poured to complete the construction of the beams, columns, and shear walls on the first floor of a building. The use of precast joints, connecting sleeves, and other connectors to connect multiple reinforcement cages, followed by exterior formwork and final concrete pouring, represents an innovation that remains true to the fundamental principle of cast-in-place steel-concrete construction: internal reinforcement bears tension, while external concrete bears compression. This is a cast-in-place solid construction process, ensuring the quality of the finished components meets industry standards. Furthermore, the amount of steel used in these finished components is minimal compared to the more commonly used, lower-cost method of cast-in-place wooden formwork. Furthermore, the standardized, modular design of all products significantly reduces the number of construction steps and simplifies construction, saving significant labor. This results in a lower total cost of construction than existing mainstream methods of cast-in-place wooden formwork and prefabricated construction, resulting in a significant cost advantage.

[0054] Third, the product can quickly capture the market and change the industry landscape.

[0055] All corporate products should follow the market concept of "cost is king" and continuously carry out cost reduction and efficiency improvement work. When the quality and function are not much different, low-cost products will surely quickly occupy the market. The combined formwork, combined steel cage, prefabricated joints, connecting sleeves and other products of the present invention are first mechanized in the factory, and then transported to the construction site to be combined into a unit cavity module of a beam, column, and shear wall. Multiple unit cavity modules are connected and concrete is poured to complete the construction of beams, columns, and shear walls on the first floor of the building. Using prefabricated joints and connecting sleeves to connect multiple steel cages, then installing the formwork, and finally pouring concrete, is an innovation that does not deviate from the essence of cast-in-place construction of steel-concrete structures, "internal steel bars bear tension, and external concrete bears pressure." It is also a cast-in-place solid process, so the quality of the finished components meets industry standards. The amount of steel used is minimal compared to the commonly used, lower-cost construction method of cast-in-place wooden formwork. Furthermore, because all products are standardized and modular, the significant reduction in construction steps and ease of construction save a significant amount of labor. This makes the total cost of the products of this invention significantly lower than the total cost of similar products using existing mainstream construction methods of cast-in-place wooden formwork and prefabricated buildings, resulting in a significant cost advantage. Therefore, the products of this invention are poised to rapidly capture the market and transform the industry landscape.

[0056] Fourth, user acceptance is high.

[0057] The modular formwork, modular steel cage, prefabricated joints, connecting sleeves and other products of the present invention are first mechanized in the factory and then transported to the construction site to be combined into a unit cavity module of beams, columns and shear walls. Multiple unit cavity modules are connected and concrete is poured to complete the construction of beams, columns and shear walls in the first floor of the building. All products are standardized and modular in design. The significant reduction in construction procedures and the simplicity of construction can save a lot of labor. The total cost of the same building using the products of the present invention is lower than the total cost of the same building using the existing mainstream construction methods of cast-in-place wooden formwork and prefabricated buildings, which has a great low-cost advantage. The advantages of low cost, simple construction and labor saving are easy for users to accept, so the user acceptance is high.

[0058] Fifth, it is in line with traditional culture and living habits.

[0059] This invention innovates on the fundamental principle of cast-in-place steel-concrete construction, where "inner steel bars bear tension, and outer concrete bears compression." It also utilizes a cast-in-place solidification process, which not only meets the technical requirements of modern construction but also aligns with traditional culture and living habits. Firstly, the modular building structure and its construction method offer high efficiency and convenience. Products produced in a standardized factory and assembled on-site reduce construction site restrictions and preparatory work, significantly shortening the construction period. This efficient construction method not only accommodates the fast-paced lifestyle of modern society but also meets the modern demand for a more efficient life. Secondly, the modular building structure and its construction method offer excellent earthquake and wind resistance, providing a more reliable safety guarantee. The inherent strength of steel, combined with the cast-in-place solidification process, makes the building structure more stable, making it suitable for areas prone to natural disasters. This safety not only meets people's basic living requirements but also aligns with the traditional pursuit of stability and security. Finally, the modular building structure and its construction method offer significant advantages in energy conservation and environmental protection. In the construction of beams, columns and shear walls, thermal insulation composite formwork with thermal insulation function is installed. It adopts high-efficiency thermal insulation materials and the heat storage performance of solid cast concrete, which reduces energy consumption, reduces household expenses, and complies with the concept of sustainable development.

[0060] To sum up, the present invention will achieve the research and development goals of "mechanized production, quality standards, simple construction, and low cost", and will complete the research purpose of "reducing costs and increasing efficiency" in the construction industry. The present invention is a breakthrough technical solution in the field of construction engineering technology, and is also a subversive product in the construction industry.

[0061] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A modular building structure, characterized in that: The modular building structure includes a beam reinforcement cage, a column reinforcement cage, a prefabricated joint and a connecting sleeve. The butt reinforcement of the prefabricated joint is rigidly connected to the reinforcement of the beam reinforcement cage or the reinforcement of the column reinforcement cage through the connecting sleeve. The rigid connection is a welding or bolt connection.

2. A modular building structure according to claim 1, characterized in that: When the connecting sleeve is welded, offset insertion holes are provided at both ends of the connecting sleeve, and a welding opening is provided on the side wall of the connecting sleeve.

3. A modular building structure according to claim 2, characterized in that: When the connecting sleeve is connected by bolts, through holes are provided at both ends of the connecting sleeve, and threaded holes are provided on the side walls of the connecting sleeve, and locking screws are provided in the threaded holes.

4. The modular building structure according to claim 1, wherein: The prefabricated joint is a square block cast with concrete reinforcement, the reinforcement extending from the side of the square block forms a butt reinforcement, and a reinforcing steel pipe extends from the center of the square block.

5. A modular building structure according to claim 4, characterized in that: A pin hole is provided at the end of the reinforced steel pipe, and a pin is inserted into the pin hole.

6. The modular building structure according to claim 1, wherein: The beam reinforcement cage, the column reinforcement cage and the butt reinforcement are evenly arranged with stirrups near the connecting sleeve.

7. The modular building structure according to claim 6, wherein: It also includes a shear wall steel cage, and the end steel bars of the shear wall steel cage are tied and fixed with the steel bars of the column steel cage, or tied and fixed with the end steel bars of another shear wall steel cage.

8. The modular building structure according to claim 7, wherein: It also includes a template, which is respectively connected and fixed to the bottom and side of the beam reinforcement cage, and the side of the column reinforcement cage and the shear wall reinforcement cage.

9. A construction method for a modular building structure according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: step 1, installing formwork on the beam reinforcement cage, column reinforcement cage and shear wall reinforcement cage, and reserving space for the connection sleeve position, and the ends of the reinforcement bars of the beam reinforcement cage and column reinforcement cage are flush; step 2, fixing the column reinforcement cage on the foundation, connecting the side of the column reinforcement cage to the shear wall reinforcement cage, installing a prefabricated joint on the top, inserting the column reinforcement cage reinforcement and the connection reinforcement of the prefabricated joint at the installation position into the connection sleeve for connection, selecting the connection sleeve according to the construction building to form a rigid node; step 3, hoisting the beam reinforcement cage, inserting the beam reinforcement cage reinforcement and the connection reinforcement of the prefabricated joint into the connection sleeve for connection, and similarly selecting the connection sleeve according to the construction building to form a rigid node; step 4, assembling multiple nodes until the connection of the overall beam, column and shear wall is completed, and filling the reserved space with the formwork; step 5, pouring concrete, forming a grouting port at the top of the external combined formwork of the column reinforcement cage and the shear wall reinforcement cage, and forming a grouting port from the empty space at the top of the combined formwork for the beam reinforcement cage.

10. The construction method of the modular building structure according to claim 9, characterized in that: When the construction building is a high-rise building, the steel cage steel bars are inserted into the connecting sleeve and the inserted connecting steel bars are staggered and double-sided welded to form a rigid connection; when the construction building is a high-rise building, the steel cage steel bars are inserted into the connecting sleeve and the inserted connecting steel bars are locked by the screw on the connecting sleeve.

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