Bolt-welding mixed connection full-prefabricated assembly type RC frame and construction technology

Abstract

The invention provides a bolt-welding mixed connection full-prefabricated assembly type RC frame and a construction technology, and relates to the technical field of constructional engineering.The bolt-welding mixed connection full-prefabricated assembly type RC frame is characterized in that a prefabricated column foundation comprises a reinforcement cage formed by welding longitudinal load-bearing steel bars and stirrups, four sleeve steel plates are welded to the top of the reinforcement cage in a surrounding mode, and the four sleeve steel plates are mutually welded to jointly form a sleeve structure; by adopting a bolt-welding mixed connection mode, connection between prefabricated parts is firm and reliable, not only can vertical load be borne, but also horizontal load can be effectively resisted, anti-seismic performance and wind resistance of the whole RC frame are improved, reasonable arrangement of the steel reinforcement cage formed by welding and connecting parts and fastening effect of high-strength bolts during assembly are achieved, and reliability of the whole RC frame is improved. The stability and safety of the structure under various working conditions are jointly guaranteed, and the problems that an existing fully-prefabricated RC frame is high in component connection firmness, large in construction wet work amount, insufficient in binding force between concrete and a steel plate, complex in assembly operation, large in error and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly relates to a bolt-weld hybrid connection fully prefabricated RC frame and a construction process. Background Art

[0002] In the field of construction engineering, with the continuous development of building industrialization, the fully prefabricated RC (reinforced concrete) frame structure has gradually become an important direction for the development of building structures due to its advantages such as improving construction efficiency and reducing labor intensity. However, there are still some problems to be solved urgently in the actual application of the existing fully prefabricated RC frame structure.

[0003] On the one hand, in terms of the connection of precast components, traditional connection methods are difficult to meet the requirements of both firmness and convenience at the same time. Some connection methods can withstand vertical loads, but perform poorly in resisting horizontal loads, resulting in insufficient seismic and wind resistance of the entire RC frame, and unable to effectively ensure the stability and safety of the structure under harsh working conditions such as earthquakes and strong winds, which limits its application in high-demand construction projects.

[0004] On the other hand, from the perspective of construction technology, there are still many wet operations in the construction site of some fully prefabricated RC frames, which not only increase the construction difficulty, extend the construction period, but also have a greater impact on the surrounding environment, and do not conform to the development concepts of green buildings and building industrialization. Moreover, due to the low standardization degree of precast component production, the production efficiency is low and the production cost is high, making it difficult to achieve good economic and social benefits.

[0005] In addition, in terms of the bonding between concrete and steel plates, in the existing technical solutions, the bonding force between concrete and steel plates is insufficient, so that when the precast components work as a whole, the steel plates and concrete cannot effectively cooperate with each other to jointly bear external forces, thereby reducing the bearing capacity and durability of the components, and it is easy to cause structural failure due to bonding force problems, affecting the service life and safety of the building structure.

[0006] At the same time, in the assembly process of precast components, the existing assembly methods are complex in operation, low in assembly efficiency, and have large assembly errors, making it difficult to ensure the stability and accuracy of the entire frame structure, and unable to meet the requirements of building industrialization for efficient and precise assembly. Summary of the Invention

[0007] The present invention relates to a bolt-weld hybrid connection fully prefabricated RC frame and a construction process, which solve the problems of the existing fully prefabricated RC frame such as insufficient firmness of component connection, many wet operations in construction, insufficient bonding force between concrete and steel plates, and complex and large-error assembly operations.

[0008] The present invention provides a bolt-weld hybrid-connected fully prefabricated RC frame, which specifically includes: precast column foundations, precast columns and precast joints. The precast column foundation includes a steel reinforcement cage formed by welding longitudinal stressed steel bars and stirrups. Four sleeve steel plates are welded around the top of the steel reinforcement cage, and the four sleeve steel plates are welded together to form a sleeve structure. The precast column includes a steel reinforcement cage formed by welding longitudinal stressed steel bars and stirrups. Four sleeve steel plates are welded around the top and bottom of the steel reinforcement cage respectively, and the four sleeve steel plates are welded together to form a sleeve structure. The precast joint includes a steel reinforcement cage formed by welding longitudinal stressed steel bars and stirrups. Four sleeve steel plates are welded around the bottom of the steel reinforcement cage, and the four sleeve steel plates are welded together to form a sleeve structure. A reserved hole c is provided on the sleeve steel plate, and a high-strength bolt is embedded and installed in the reserved hole c, and the screw rod of the high-strength bolt faces outward. Stud b is welded on the inner surface of the sleeve steel plate. The sleeve steel plate and the steel reinforcement cage are precast into one body with concrete.

[0009] Further, the precast column foundations, precast columns and precast joints are sequentially stacked and assembled. During the assembly process, end plates are jointly installed on the outer surfaces of two adjacent sleeve steel plates in the upper and lower positions. A mating hole adapted to the high-strength bolt is provided on the end plate. During assembly, the screw rod of the high-strength bolt passes through the mating hole and is locked and fixed by means of a nut.

[0010] Further, a transverse connecting bar is welded and extended to the right inside the steel reinforcement cage of the precast joint. L-shaped sleeve steel plates are welded on both the front and rear sides of the transverse connecting bar. Adaptor steel plates adapted to the two L-shaped sleeve steel plates are respectively welded on the top and bottom of the transverse connecting bar. The adaptor steel plate and the L-shaped sleeve steel plate are welded together to form an L-shaped sleeve structure.

[0011] Further, a precast beam is also included. The precast beam includes a steel reinforcement cage formed by welding transverse stressed steel bars and stirrups. L-shaped sleeve steel plates are welded on both the front and rear sides of the transverse connecting bars extending from the left and right sides of the steel reinforcement cage. Adaptor steel plates adapted to the two L-shaped sleeve steel plates are respectively welded on the top and bottom of the extended transverse stressed steel bars. The adaptor steel plate and the L-shaped sleeve steel plate are welded together to form an L-shaped sleeve structure.

[0012] Further, a row of folded triangular steel bars is welded on the top of the steel reinforcement cage of the precast beam. A reserved hole a is provided on the L-shaped sleeve steel plate, and a high-strength bolt is embedded and installed in the reserved hole a, and the screw rod of the high-strength bolt faces outward. A reserved hole b is provided on the adaptor steel plate, and a high-strength bolt is embedded and installed in the reserved hole b, and the screw rod of the high-strength bolt faces outward. Stud a is welded on the inner surface of the L-shaped sleeve steel plate. The L-shaped sleeve steel plate, the adaptor steel plate and the steel reinforcement cage are precast into one body with concrete.

[0013] Further, during the assembly process of the precast beam and the precast joint, end plates are commonly installed on the outer surfaces of two adjacent L-shaped casing steel plates and two adjacent mating steel plates, and the screw rod of the high-strength bolt passes through the mating holes on the end plates and is tightened with nuts.

[0014] The present invention provides a bolt-weld hybrid-connected fully prefabricated RC frame and construction technology, which has the following beneficial effects:

[0015] The present invention uses the bolt-weld hybrid connection method to make the connection between precast components firm and reliable. It can not only bear vertical loads, but also effectively resist horizontal loads, improving the seismic performance and wind resistance of the entire RC frame. The reasonable setting of the steel reinforcement cage and connection components formed by welding, as well as the tightening effect of high-strength bolts during assembly, jointly ensure the stability and safety of the structure under various working conditions.

[0016] For the fully prefabricated RC frame of the present invention, each component is prefabricated in the factory, reducing the wet work and construction difficulty at the construction site, reducing the impact of construction on the environment, and conforming to the development trend of building industrialization. At the same time, the standardized production and assembly of precast components are beneficial to improving production efficiency and reducing production costs, having good economic and social benefits.

[0017] By setting stud a and stud b, the present invention significantly enhances the bonding force between the concrete and the steel plate, enabling the steel plate and the concrete to act synergistically and jointly bear external forces during the overall operation of the precast component, improving the bearing capacity and durability of the component, and effectively avoiding the structural failure problem caused by insufficient bonding force.

[0018] During the assembly process of the precast column foundation, precast column and precast joint of the present invention, the superposition assembly installation method is adopted, and by installing end plates on the outer surfaces of adjacent casing steel plates and using high-strength bolts and nuts for locking and fixing, this connection method is simple, convenient and fast, greatly improving the assembly efficiency. At the same time, during the assembly of the precast joint and the precast beam, by aligning and embedding the extended end of the L-shaped casing steel plate in the precast beam into the corresponding groove structure of the precast joint and installing end plates and fixing with high-strength bolts, the adaptable assembly is achieved, further improving the accuracy and reliability of the assembly, reducing the assembly error, and ensuring the stability of the entire frame structure.

[0019] In summary, the bolt-weld hybrid-connected fully prefabricated RC frame of the present invention has outstanding advantages in terms of manufacturing process, assembly efficiency, structural performance and industrial application, and has broad application prospects and promotion value. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0021] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0022] In the accompanying drawings:

[0023] Figure 1 A front view structural schematic diagram of the present invention is shown;

[0024] Figure 2 A structural schematic diagram of the precast joints and precast beams of the present invention in a disassembled state is shown;

[0025] Figure 3 The Figure 2 partial enlarged structural schematic diagram at position A of the present invention is shown;

[0026] Figure 4 A structural schematic diagram of the precast beam of the present invention is shown;

[0027] Figure 5 A structural schematic diagram of the precast beam of the present invention in a disassembled state is shown;

[0028] Figure 6 The Figure 5 partial enlarged structural schematic diagram at position B of the present invention is shown;

[0029] Figure 7 A structural schematic diagram of the precast column foundation, precast column, and precast joints of the present invention in an assembled state is shown;

[0030] Figure 8 The Figure 7 structural schematic diagram in a disassembled state of the present invention is shown;

[0031] Figure 9 A structural schematic diagram of the precast column foundation, precast column, and precast joints of the present invention in a disassembled state is shown;

[0032] Figure 10 The Figure 9 partial enlarged structural schematic diagram at position C of the present invention is shown;

[0033] List of reference numerals

[0034] 1. Precast column foundation; 2. Precast column; 3. Precast joint; 4. Precast beam; 401. Bent triangular steel bars; 5. End plate; 501. Matching hole; 6. Nut; 7. L-shaped casing steel plate; 701. Reserved hole a; 702. Stud a; 8. High-strength bolt; 9. Adaptor steel plate; 901. Reserved hole b; 10. Casing steel plate; 1001. Reserved hole c; 1002. Stud b. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] Embodiment: Please refer to Figures 1 to 10 :

[0037] The present invention proposes a bolt-weld hybrid-connected fully prefabricated RC frame, including: a precast column foundation 1, precast columns 2, and precast joints 3. The precast column foundation 1 includes a steel reinforcement cage formed by welding longitudinal stressed steel bars and stirrups. Four sleeve steel plates 10 are welded around the top of the steel reinforcement cage, and the four sleeve steel plates 10 are welded together to form a sleeve structure. The precast column 2 includes a steel reinforcement cage formed by welding longitudinal stressed steel bars and stirrups. Four sleeve steel plates 10 are welded around the top and bottom of the steel reinforcement cage, and the four sleeve steel plates 10 are welded together to form a sleeve structure. The precast joint 3 includes a steel reinforcement cage formed by welding longitudinal stressed steel bars and stirrups. Four sleeve steel plates 10 are welded around the bottom of the steel reinforcement cage, and the four sleeve steel plates 10 are welded together to form a sleeve structure. A reserved hole c1001 is provided on the sleeve steel plate 10, and a high-strength bolt 8 is embedded and installed in the reserved hole c1001, and the screw rod of the high-strength bolt 8 faces outward. A stud b1002 is welded on the inner surface of the sleeve steel plate 10. The sleeve steel plate 10 and the steel reinforcement cage are precast into one body with concrete. The precast column foundation 1, precast columns 2, and precast joints 3 are assembled and installed in sequence. During the assembly process, end plates 5 are jointly installed on the outer surfaces of two adjacent sleeve steel plates 10 in the vertical position. A mating hole 501 adapted to the high-strength bolt 8 is provided on the end plate 5. During assembly, the screw rod of the high-strength bolt 8 passes through the mating hole 501 and is locked and fixed by means of a nut 6.

[0038] Among them, a transverse tie bar is welded and extended to the right inside the steel reinforcement cage of the precast joint 3, and L-shaped sleeve steel plates 7 are welded on both the front and rear sides of the transverse tie bar. Moreover, matching steel plates 9 adapted to the two L-shaped sleeve steel plates 7 are respectively welded to the top and bottom of the transverse tie bar. The matching steel plate 9 and the L-shaped sleeve steel plate 7 are welded to each other to jointly form an L-shaped sleeve structure. It also includes a precast beam 4, and the precast beam 4 includes a steel reinforcement cage formed by welding transverse stressed steel bars and stirrups. On both the front and rear sides of the transverse tie bars extended from the left and right sides of the steel reinforcement cage, L-shaped sleeve steel plates 7 are welded. Moreover, matching steel plates 9 adapted to the two L-shaped sleeve steel plates 7 are respectively welded to the top and bottom of the extended transverse stressed steel bars. The matching steel plate 9 and the L-shaped sleeve steel plate 7 are welded to each other to jointly form an L-shaped sleeve structure. A row of folded triangular steel bars 401 is welded to the top of the steel reinforcement cage of the precast beam 4. Reserved holes a701 are formed on the L-shaped sleeve steel plates 7, and high-strength bolts 8 are embedded and installed in the reserved holes a701, and the screw rods of the high-strength bolts 8 face outward. Reserved holes b901 are formed on the matching steel plates 9, and high-strength bolts 8 are embedded and installed in the reserved holes b901, and the screw rods of the high-strength bolts 8 face outward. Studs a702 are welded to the inner surface of the L-shaped sleeve steel plates 7. The L-shaped sleeve steel plates 7, the matching steel plates 9 and the steel reinforcement cage are precast into one body with concrete. During the assembly process of the precast beam 4 and the precast joint 3, end plates 5 are jointly installed on the outer surfaces of two adjacent L-shaped sleeve steel plates 7 and two adjacent matching steel plates 9, and the screw rods of the high-strength bolts 8 pass through the mating holes 501 on the end plates 5 and are fastened by nuts 6.

[0039] Working principle of this embodiment:

[0040] Manufacture of the precast column foundation 1, the precast column 2, the precast joint 3 and the precast beam 4:

[0041] Weld the longitudinal stressed steel bars and stirrups according to the design requirements to form the steel reinforcement cages of the precast column foundation 1, the precast column 2 and the precast joint 3;

[0042] Weld four sleeve steel plates 10 around the top of the steel reinforcement cage of the precast column foundation 1, so that the four sleeve steel plates 10 are welded to each other to jointly form a sleeve structure, and the screw rod of the high-strength bolt 8 passes through the reserved hole c1001 and faces outward;

[0043] Weld four sleeve steel plates 10 around the top and bottom of the steel reinforcement cage of the precast column 2 respectively. Similarly, the four sleeve steel plates 10 are welded to each other to form a sleeve structure, and the screw rod of the high-strength bolt 8 passes through the reserved hole c1001 and faces outward;

[0044] Weld four sleeve steel plates 10 around the bottom of the steel reinforcement cage of the precast joint 3, so that the four sleeve steel plates 10 are welded to each other to form a sleeve structure, and the screw rod of the high-strength bolt 8 passes through the reserved hole c1001 and faces outward;

[0045] Inside the steel reinforcement cage of the precast joint 3, a transverse connecting bar is welded and extended to the right, and L-shaped sleeve steel plates 7 are welded on both the front and rear sides of the transverse connecting bar. Moreover, matching steel plates 9 adapted to the two L-shaped sleeve steel plates 7 are respectively welded to the top and bottom of the transverse connecting bar. And the matching steel plate 9 and the L-shaped sleeve steel plate 7 are welded to each other to jointly form an L-shaped sleeve structure, and the screw rod of the high-strength bolt 8 passes through the reserved hole a701 and the reserved hole b901 and faces outward;

[0046] The transverse stressed bars and stirrups are welded according to the design requirements to form the steel reinforcement cage of the precast beam 4, and a row of folded triangular bars 401 are welded to the top of the steel reinforcement cage of the precast beam 4;

[0047] On both the front and rear sides of the transverse connecting bars extended from the left and right sides of the steel reinforcement cage of the precast beam 4, L-shaped sleeve steel plates 7 are welded, and matching steel plates 9 adapted to the two L-shaped sleeve steel plates 7 are respectively welded to the top and bottom of the extended transverse stressed bars. And the matching steel plate 9 and the L-shaped sleeve steel plate 7 are welded to each other to jointly form an L-shaped sleeve structure;

[0048] The above is precast integrally with concrete to complete the fabrication of the precast column foundation 1, precast column 2, precast joint 3 and precast beam 4. And through the arrangement of stud a702 and stud b1002, the bonding force between the concrete and the steel plate is enhanced;

[0049] Assembly of the precast column foundation 1, precast column 2 and precast joint 3:

[0050] The precast column foundation 1, precast column 2 and precast joint 3 are superposed and assembled and installed;

[0051] During the superposition and assembly installation process, the end plates 5 are jointly installed on the outer surfaces of two adjacent sleeve steel plates 10 in the up and down positions. And the screw rod of the high-strength bolt 8 passes through the mating hole 501 and is locked and fixed by means of the nut 6 to realize the assembly and installation of the precast column foundation 1, precast column 2 and precast joint 3;

[0052] Assembly of the precast joint 3 and precast beam 4:

[0053] During the assembly of the precast beam 4 and the precast joint 3, the extended end of the precast beam 4 corresponding to the L-shaped sleeve steel plate 7 is aligned and embedded into the groove structure corresponding to the extended end of the L-shaped sleeve steel plate 7 in the precast joint 3 to realize the adaptive assembly. Then, the end plates 5 are jointly installed on the outer surfaces of two adjacent L-shaped sleeve steel plates 7 and two adjacent matching steel plates 9, so that the screw rod of the high-strength bolt 8 passes through the mating hole 501 and is locked and fixed by means of the nut 6 to realize the assembly and installation of the precast beam 4 and the precast joint 3.

Claims

1. A fully prefabricated RC frame with hybrid bolt-welding connection, characterized in that: include: A prefabricated column foundation (1), a prefabricated column (2) and a prefabricated node (3), wherein the prefabricated column foundation (1) comprises a steel cage welded by longitudinal stress-bearing steel bars and stirrups, four casing steel plates (10) are welded around the top of the steel cage, and the four casing steel plates (10) are welded together to form a casing structure; the prefabricated column (2) comprises a steel cage welded by longitudinal stress-bearing steel bars and stirrups, four casing steel plates (10) are welded around the top and bottom of the steel cage, and the four casing steel plates (10) are welded together to form a casing structure; the prefabricated node (3) It comprises a steel cage welded by longitudinal force-bearing steel bars and stirrups, four casing steel plates (10) are welded around the bottom of the steel cage, and the four casing steel plates (10) are welded to each other to form a casing structure; the casing steel plate (10) is provided with a reserved hole c (1001), and a high-strength bolt (8) is pre-embedded and installed in the reserved hole c (1001), and the screw of the high-strength bolt (8) faces outward; the inner surface of the casing steel plate (10) is welded with a bolt b (1002); the casing steel plate (10) and the steel cage are prefabricated as a whole by concrete.

2. A bolt-welded hybrid connection fully prefabricated assembled RC frame according to claim 1, characterized in that: The prefabricated column foundation (1), the prefabricated column (2), and the prefabricated node (3) are sequentially stacked and assembled. During the assembly process, the outer surfaces of the two adjacent casing steel plates (10) in the upper and lower positions are jointly installed with an end plate (5); the end plate (5) is provided with a matching hole (501) that is compatible with the high-strength bolt (8). During assembly, the screw of the high-strength bolt (8) passes through the matching hole (501) and is locked and fixed with the help of a nut (6).

3. A bolt-welded hybrid connection fully prefabricated assembled RC frame according to claim 2, characterized in that: A transverse connecting rib is welded to the right side of the steel cage of the prefabricated node (3), and L-shaped sleeve steel plates (7) are welded to the front and rear sides of the transverse connecting rib, and matching steel plates (9) matching the two L-shaped sleeve steel plates (7) are respectively welded to the top and bottom of the transverse connecting rib, and the matching steel plates (9) and the L-shaped sleeve steel plates (7) are welded to each other to form an L-shaped sleeve structure.

4. The bolt-welded hybrid connection fully prefabricated assembled RC frame according to claim 3, characterized in that: The invention also comprises a prefabricated beam (4), wherein the prefabricated beam (4) comprises a steel cage formed by welding transverse force-bearing steel bars and stirrups, and L-shaped sleeve steel plates (7) are welded to the front and rear sides of transverse connecting bars extending from the left and right sides of the steel cage, and matching steel plates (9) matching the two L-shaped sleeve steel plates (7) are respectively welded to the top and bottom of the extended transverse force-bearing bars, and the matching steel plates (9) and the L-shaped sleeve steel plates (7) are welded to each other to form an L-shaped sleeve structure.

5. The bolt-welded hybrid connection fully prefabricated assembled RC frame according to claim 4, characterized in that: A row of folded triangular steel bars (401) is welded to the top of the steel cage of the prefabricated beam (4); a reserved hole a (701) is provided on the L-shaped sleeve steel plate (7), and a high-strength bolt (8) is pre-embedded and installed in the reserved hole a (701), and the screw rod of the high-strength bolt (8) faces outward; a reserved hole b (901) is provided on the adapter steel plate (9), and a high-strength bolt (8) is pre-embedded and installed in the reserved hole b (901), and the screw rod of the high-strength bolt (8) faces outward; a bolt a (702) is welded on the inner surface of the L-shaped sleeve steel plate (7); the L-shaped sleeve steel plate (7), the adapter steel plate (9) and the steel cage are prefabricated as a whole by concrete.

6. The bolt-welded hybrid connection fully prefabricated assembled RC frame according to claim 5, characterized in that: During the assembly process of the prefabricated beam (4) and the prefabricated node (3), the outer surfaces of the two adjacent L-shaped sleeve steel plates (7) and the two adjacent adapter steel plates (9) are both installed with end plates (5), and the screw rods of the high-strength bolts (8) pass through the matching holes (501) on the end plates (5) and are fastened by nuts (6).

7. A construction process for a fully prefabricated assembled RC frame with a bolt-welding hybrid connection as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1. Steel cage production: Welding longitudinal stress-bearing steel bars and stirrups according to design requirements to produce steel cages for prefabricated column foundations (1), prefabricated columns (2) and prefabricated nodes (3); Welding transverse force-bearing steel bars and stirrups according to design requirements to make a steel cage of the prefabricated beam (4), and welding a row of folded triangular steel bars (401) on the top thereof; Step 2. Casing structure welding: Four casing steel plates (10) are welded around the top of the steel cage of the prefabricated column foundation (1) so that they are welded to each other to form a casing structure, and the screw rods of the high-strength bolts (8) pass through the reserved holes c (1001) and face outwards; Four casing steel plates (10) are welded around the top and bottom of the reinforcement cage of the prefabricated column (2) to form a casing structure, and the screw rods of the high-strength bolts (8) pass through the reserved holes c (1001) and face outwards; Four casing steel plates (10) are welded around the bottom of the steel cage of the prefabricated node (3) to form a casing structure, and the screw rods of the high-strength bolts (8) pass through the reserved holes c (1001) and face outwards; A transverse connecting rib is welded on the right side of the steel cage of the prefabricated node (3), an L-shaped sleeve steel plate (7) is welded on the front and rear sides thereof, an adapting steel plate (9) is welded on the top and bottom, the adapting steel plate (9) and the L-shaped sleeve steel plate (7) are welded to each other to form an L-shaped sleeve structure, and the screw rod of the high-strength bolt (8) passes through the reserved hole a (701) and the reserved hole b (901) and faces outward; L-shaped sleeve steel plates (7) are welded to the front and rear sides of the transverse connecting ribs extending from the left and right sides of the steel cage of the prefabricated beam (4), and matching steel plates (9) are welded to the top and bottom, and the two are welded to each other to form an L-shaped sleeve structure; Step 3. Concrete prefabrication: The steel bars and steel plates of each component in step 2 are prefabricated into one piece by using concrete, and the bonding force between the concrete and the steel plates is enhanced by using bolts a (702) and bolts b (1002), thereby completing the production of the prefabricated column foundation (1), the prefabricated column (2), the prefabricated node (3) and the prefabricated beam (4); Step 4: Assembly of prefabricated column foundation (1), prefabricated column (2), and prefabricated node (3): The prefabricated column foundation (1), the prefabricated column (2), and the prefabricated node (3) are stacked and assembled, and the end plate (5) is installed on the outer surface of the two adjacent casing steel plates (10) above and below. The screw rod of the high-strength bolt (8) passes through the matching hole (501) and is locked and fixed with a nut (6) to complete the assembly; Step 5: Assembly of prefabricated nodes (3) and prefabricated beams (4): When the prefabricated beam (4) and the prefabricated node (3) are assembled, the extended end of the L-shaped sleeve steel plate (7) in the prefabricated beam (4) is aligned and embedded in the corresponding groove in the prefabricated node (3) to achieve adaptive assembly, and the end plate (5) is installed on the outer surface of the two adjacent L-shaped sleeve steel plates (7) and the adaptive steel plate (9), and the screw rod of the high-strength bolt (8) is passed through the matching hole (501) and locked and fixed with the nut (6) to complete the assembly.

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