Fabricated frame beam-column connecting joint for factory building and construction method of fabricated frame beam-column connecting joint

Abstract

The invention provides a factory building assembly type frame beam-column connecting joint which comprises a prefabricated column and a prefabricated beam, a bracket is arranged on the prefabricated column, the bracket is provided with a butt joint part, a first steel plate is pre-buried in the butt joint part, a positioning groove is formed in the prefabricated beam, and a second steel plate is pre-buried in the positioning groove; the bracket is provided with an embedded part, the embedded part comprises a flat plate part, two pressing assemblies are arranged on the flat plate part, each pressing assembly comprises a seat body, each seat body is provided with a pressing block, a locking screw rod and a locking nut, a third steel plate is embedded in the precast beam, the third steel plate is provided with a groove, and the pressing blocks abut against the third steel plate; a cover piece is arranged on the embedded part and fixedly connected with the flat plate part, and the groove is filled with the cover piece. The invention further provides a construction method of the factory building assembly type frame beam-column connecting joint. The construction method is based on the factory building assembly type frame beam-column connecting joint. The technical problems that when an existing beam column connecting joint is built, the requirement for assembly precision is high, and construction efficiency is low are solved, and the technical effect of improving the assembly precision and the assembly efficiency is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a factory building prefabricated frame beam-column connection node and a factory building prefabricated frame beam-column connection node construction method based on the factory building prefabricated frame beam-column connection node. Background Art

[0002] Prefabricated structures are concrete structures constructed by assembling and connecting prefabricated components as their primary load-bearing members. Compared to cast-in-place construction methods, prefabricated structures promote green construction, improve production efficiency, and conserve energy. In prefabricated frame structures, beam-column joints connect prefabricated beams and columns into a single unit, providing load transfer and seismic energy dissipation.

[0003] The existing method for constructing prefabricated frame beam-column connection nodes generally includes the following steps: first, prefabricating prefabricated reinforced concrete prefabricated columns and prefabricated beams with corbels on the prefabricated columns, and pre-embedded steel plates on the corbels and prefabricated beams; then, transporting the prefabricated beams and prefabricated columns to the construction site and installing the prefabricated columns with corbels; after the prefabricated columns are installed, hoisting the prefabricated beams onto the corbels and docking the embedded steel plates on the prefabricated beams with the embedded steel plates on the corbels; finally, welding the embedded steel plates on the prefabricated beams with the embedded steel plates on the corbels to complete the construction of the connection node. Because the existing prefabricated frame beam-column connection nodes require docking the prefabricated beams with the corbels before welding, high assembly precision is required. Furthermore, in order to prevent the prefabricated beams from shifting or falling during the welding process, temporary supports need to be provided on the prefabricated columns, and the temporary supports need to be removed after welding is completed, resulting in low construction efficiency. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention provides a factory building prefabricated frame beam-column connection node and a factory building prefabricated frame beam-column connection node construction method based on the factory building prefabricated frame beam-column connection node, which solves the problems in the prior art of high assembly precision requirements and low construction efficiency when constructing beam-column connection nodes.

[0005] According to an embodiment of the present invention, a factory building assembled frame beam-column connection node includes a prefabricated column and a prefabricated beam, a corbel is provided on the prefabricated column, the corbel has a butt joint, and the edge of the butt joint is pre-embedded with a first steel plate, the end of the prefabricated beam is provided with a positioning groove that matches the butt joint, the edge of the positioning groove is pre-embedded with a second steel plate, and the second steel plate is in contact with the first steel plate; the top of the corbel is also provided with an embedded part, the embedded part includes a flat plate part, and the flat plate part is located between the corbel and the prefabricated beam and extends to both sides of the prefabricated beam, two clamping assemblies are spaced apart on the flat plate part, and the two clamping assemblies are respectively located on opposite sides of the prefabricated beam, and the clamping assemblies are provided on the top of the prefabricated beam. The component includes a base body detachably connected to the flat plate part, and the base body is provided with a rotatable pressure block, a rotatable locking screw and a locking nut matching the locking screw. The rotating axis of the pressure block and the rotating axis of the locking screw are spaced apart and the pressure block is provided with a slot for the locking screw to pass through. The locking nut abuts against the side of the pressure block away from the base body, and a third steel plate is embedded in the side of the prefabricated beam away from the corbel and the third steel plate has a groove. The pressure block extends into the groove and abuts against the third steel plate; a cover plate is also provided on the embedded part, and both ends of the cover plate are respectively fixedly connected to the flat plate part and part of the cover plate abuts against the side of the prefabricated beam away from the corbel and fills the groove.

[0006] On the other hand, according to an embodiment of the present invention, a method for constructing a factory building assembled frame beam-column connection node is also provided. Based on the above-mentioned factory building assembled frame beam-column connection node, the method includes the following steps:

[0007] S1. Prefabricated columns and prefabricated beams are manufactured. When the prefabricated columns are cast, a corbel is formed on the prefabricated columns and a first steel plate and embedded parts are embedded on the corbel. When the prefabricated beams are cast, a second steel plate and a third steel plate are embedded on the prefabricated beams.

[0008] S2. Install the prefabricated column and install the two pressing assemblies on the flat plate portion of the embedded part;

[0009] S3. Hoist the precast beam onto the precast column so that the butt joint of the corbel is inserted into the positioning groove, and rotate the locking nut so that the pressing block extends into the positioning groove on the third steel plate while pressing the end of the precast beam onto the corbel;

[0010] S4. Welding the first steel plate and the second steel plate together to form a weld between the first steel plate and the second steel plate. After the first steel plate and the second steel plate are welded together, the pressing assembly is removed from the flat plate portion and a cover plate is installed on the flat plate portion. The cover plate is then welded together with the third steel plate to form welds between both sides of the cover plate and the third steel plate.

[0011] S5. Perform rust-proofing treatment on the exposed surfaces of the first steel plate, the second steel plate, the third steel plate and the cover plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: by forming a corbel with a butt joint on the prefabricated column, and providing a groove that cooperates with the butt joint on the prefabricated beam, the prefabricated beam is positioned on the prefabricated column by the cooperation between the butt joint and the groove, which facilitates the connection node combination, and embedded parts are embedded on the corbel. After the prefabricated beam is hoisted onto the prefabricated column and butt jointed with the corbel, the two clamping assemblies on the embedded parts are respectively located on the opposite sides of the prefabricated beam. At this time, the locking nut is rotated to move the locking nut on the locking screw and drive the pressing block to rotate until the pressing block extends into the groove of the third steel plate on the prefabricated beam and presses the prefabricated beam onto the corbel, so that the position of the end of the prefabricated beam on the prefabricated column is locked and the prefabricated beam is tightened. The second steel plate is kept in close contact with the first steel plate on the corbel, thereby quickly fixing the position of the prefabricated beam and preventing the prefabricated beam from deviating during the process of welding and fixing the first steel plate and the second steel plate. After the welding of the first steel plate and the second steel plate is completed, the locking nut is rotated in the opposite direction and the pressure block is rotated to release the lock of the prefabricated beam. After the clamping assembly is removed from the prefabricated part, the cover plate can be installed on the prefabricated part and the part of the cover plate filling the groove is welded to the third steel plate to ensure the strength and reliability of the connection node. It solves the technical problems of high assembly precision and low construction efficiency when constructing the existing beam-column connection node, and produces the technical effect of improving the assembly precision and assembly efficiency of the connection node and simple and convenient assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a prefabricated beam locked by a pressing assembly in a beam-column connection node of a prefabricated frame of a factory building according to the first embodiment of the present invention;

[0014] Figure 2 This is a schematic structural diagram of the first embodiment of the present invention, in which the clamping assembly in the beam-column connection node of the prefabricated frame of the factory building is unlocked;

[0015] Figure 3 This is a structural diagram of the installation of a cover plate in a beam-column connection node of a prefabricated frame of a factory building according to the first embodiment of the present invention;

[0016] Figure 4 This is a schematic structural diagram of a prefabricated column in a beam-column connection node of a factory building prefabricated frame according to the first embodiment of the present invention;

[0017] Figure 5 This is a schematic structural diagram of a prefabricated beam in a beam-column connection node of a factory building prefabricated frame according to a first embodiment of the present invention;

[0018] Figure 6 This is a schematic structural diagram of prefabricated parts in a beam-column connection node of a factory building assembled frame according to the first embodiment of the present invention;

[0019] Figure 7 This is an exploded view of a compression assembly in a beam-column connection node of a prefabricated frame of a factory building according to the first embodiment of the present invention;

[0020] Figure 8 This is a schematic structural diagram of a cover plate in a beam-column connection node of a prefabricated frame of a factory building according to the first embodiment of the present invention;

[0021] Figure 9 This is a step diagram of the method for constructing the beam-column connection nodes of the prefabricated frame of a factory building according to the second embodiment of the present invention.

[0022] In the above drawings: 1. Prefabricated column; 11. Corbel; 12. Butt joint; 13. First steel plate; 14. Inclined surface; 2. Prefabricated beam; 21. Positioning groove; 22. Second steel plate; 23. Third steel plate; 24. Groove; 3. Embedded part; 31. Flat plate; 32. Insert plate; 33. Through hole; 34. Limiting frame; 4. Clamping assembly; 41. Base; 42. Pressing block; 43. Locking screw; 44. Locking nut; 45. Slot; 46. First threaded rod; 47. First nut; 5. Cover plate; 51. Mounting part; 52. Second threaded rod; 53. Second nut. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] like Figures 1 to 8As shown, the first embodiment of the present invention proposes a factory building assembled frame beam-column connection node, including a prefabricated column 1 and a prefabricated beam 2, wherein the prefabricated column 1 is provided with a corbel 11, the corbel 11 has a butt joint 12, and the edge of the butt joint 12 is pre-embedded with a first steel plate 13, the end of the prefabricated beam 2 is provided with a positioning groove 21 that matches the butt joint 12, the edge of the positioning groove 21 is pre-embedded with a second steel plate 22, and the second steel plate 22 is in contact with the first steel plate 13, and the prefabricated column 1 and the prefabricated beam 2 can be quickly assembled into one by matching the butt joint 12 with the positioning groove 21. And the first steel plate 13 is butted against the second steel plate 22; the top of the corbel 11 is also provided with an embedded part 3, the embedded part 3 includes a flat plate portion 31 and the flat plate portion 31 is located between the corbel 11 and the precast beam 2 and extends to both sides of the precast beam 2, two clamping assemblies 4 are spaced apart on the flat plate portion 31 and the two clamping assemblies 4 are respectively located on opposite sides of the precast beam 2, the clamping assembly 4 includes a seat body 41 detachably connected to the flat plate portion 31, and the seat body 41 is provided with a rotatable pressing block 42, a rotatable locking screw 43 and a locking screw 43 The locking nut 44 is matched with the locking nut 44, the rotation axis of the pressure block 42 is spaced from the rotation axis of the locking screw 43 and the pressure block 42 is provided with a slot 45 for the locking screw 43 to pass through, the locking nut 44 abuts against the side of the pressure block 42 away from the seat body 41, the side of the precast beam 2 away from the corbel 11 is pre-embedded with a third steel plate 23 and the third steel plate 23 has a groove 24, the pressure block 42 extends into the groove 24 and abuts against the third steel plate 23, and rotating the locking nut 44 can make the pressure block 42 press the precast beam 2 on the corbel 11 to prevent To prevent the prefabricated beam 2 from deflecting or falling during welding; a cover plate 5 is also provided on the embedded part 3, and both ends of the cover plate 5 are respectively fixedly connected to the flat plate part 31 and part of the cover plate 5 abuts against the side of the prefabricated beam 2 away from the corbel 11 and fills the groove 24. After the welding of the first steel plate 13 and the second steel plate 22 is completed, the clamping assembly 4 is removed from the embedded part 3 and the cover plate 5 is installed. The cover plate 5 is fixedly connected to the embedded part 3 and the cover plate 5 is welded to the third steel plate 23, thereby further improving the connection strength between the prefabricated beam 2 and the prefabricated column 1.

[0026] Specifically, the factory building assembled frame beam-column connection node provided in this embodiment positions the prefabricated beam 2 on the prefabricated column 1 through the cooperation of the docking portion 12 and the groove 24, so as to facilitate the assembly of the factory building assembled frame beam-column connection node; after the prefabricated beam 2 is hoisted onto the prefabricated column 1 and docked with the corbel 11, the two clamping assemblies 4 are respectively located on opposite sides of the prefabricated beam 2, and the locking nut 44 is rotated to rotate the pressing block 42 until the pressing block 42 presses the prefabricated beam 2 on the corbel 11, so that the position of the end of the prefabricated beam 2 on the prefabricated column 1 can be locked, and the second steel plate 22 is kept in close contact with the first steel plate 13, thereby The position of the prefabricated beam 2 is quickly fixed to prevent the prefabricated beam 2 from shifting during the process of welding and fixing the first steel plate 13 and the second steel plate 22. After the welding of the first steel plate 13 and the second steel plate 22 is completed, the locking nut 44 is rotated in the opposite direction and the pressure block 42 is rotated to release the lock on the prefabricated beam 2. After the pressing assembly 4 is removed from the prefabricated part, the cover plate 5 can be installed on the prefabricated part, and the cover plate 5 is used to fill the part of the groove 24 and weld the cover plate 5 to the third steel plate 23 to improve the connection strength between the prefabricated beam 2 and the prefabricated column 1, ensuring the strength and reliability of the factory building prefabricated frame beam-column connection node. The factory building prefabricated frame beam-column connection node provided in this embodiment has high assembly precision and is simple and convenient to assemble, which effectively improves construction efficiency.

[0027] Please combine Figure 3 and Figure 4 The butt joint 12 has an inclined surface 14, which is aligned with the positioning groove 21, and a first mortar layer is filled between the inclined surface 14 and the positioning groove 21. Before the butt joint 12 is butted against the positioning groove 21, mortar is applied to the inclined surface 14 to form the first mortar layer between the butt joint 12 and the precast beam 2. The first mortar layer can bond the corbel 11 to the precast beam 2, further improving the connection strength of the beam-column connection node of the prefabricated frame of the factory building and enhancing the seismic performance of the beam-column connection node of the prefabricated frame of the factory building.

[0028] In this embodiment, the first steel plate 13 is provided with a first steel bar, which is embedded in the corbel 11; the second steel plate 22 is provided with a second steel bar, which is embedded in the precast beam 2. By providing the first steel bar on the first steel plate 13 and the second steel bar on the second steel plate 22, the first steel bar is embedded in the corbel 11 and the second steel bar is embedded in the precast beam 2 during the casting of the precast column 1 and the precast beam 2, thereby ensuring a reliable connection between the first steel plate 13 and the corbel 11 and between the second steel plate 22 and the precast beam 2, and preventing damage to the beam-column connection node of the factory building prefabricated frame due to the detachment of the first steel plate 13 or the second steel plate 22.

[0029] like Figure 6 As shown, the embedded part 3 further includes a plurality of inserting plates 32, which are vertically arranged on the flat plate portion 31 and embedded in the corbel 11. The inserting plates 32 arranged on the embedded part 3 are embedded in the corbel 11 during the casting process of the precast column 1, which facilitates the installation of the embedded part 3 on the corbel 11 while ensuring a reliable connection between the embedded part 3 and the corbel 11.

[0030] Specifically, there are three inserting plates 32, and the three inserting plates 32 are arranged in a T-shape on the flat plate portion 31. Three vertical inserting plates 32 are provided on the flat plate portion 31 and arranged in a T-shape. When the precast column 1 is cast, the three inserting plates 32 are respectively embedded in the corbels 11, so that the position of the embedded parts 3 on the corbels 11 remains stable, which helps to improve the structural stability of the beam-column connection node of the prefabricated frame of the factory building.

[0031] like Figure 6 and Figure 7 As shown, two through holes 33 are provided on the flat plate portion 31 at intervals, and the two through holes 33 are respectively located on opposite sides of the precast beam 2. A first threaded rod 46 and a first nut 47 that cooperates with the first threaded rod 46 are provided on the base body 41. The first threaded rod 46 passes through the through hole 33, and the first nut 47 abuts against the side of the flat plate portion 31 away from the base body 41. When the clamping assembly 4 is installed on the flat plate portion 31, the first threaded rod 46 is passed through the through hole 33 and the first nut 47 is tightened. The installation operation is simple. After the first steel plate 13 and the second steel plate 22 are welded, when the clamping assembly 4 needs to be removed, the first nut 47 is loosened and removed from the first threaded rod 46. At this time, the first threaded rod 46 can be pulled out of the through hole 33 and the base body 41 can be separated from the flat plate portion 31, making it convenient to disassemble and assemble the clamping assembly 4 according to the installation progress.

[0032] Please combine Figure 6 and Figure 8 The cover plate 5 is provided with mounting portions 51 at opposite ends thereof, each of which is in contact with the flat plate portion 31. The mounting portions 51 are provided with a second threaded rod 52 and a second nut 53 that cooperates with the second threaded rod 52. The second threaded rod 52 passes through the through-hole 33, and the second nut 53 abuts against a surface of the flat plate portion 31 away from the mounting portion 51. By providing the mounting portions 51 at both ends of the cover plate 5 and mounting the mounting portions 51 to the flat plate portion 31 through the cooperation of the second nut 53 and the second threaded rod 52, the connection between the cover plate 5 and the embedded component 3 is ensured, and the cover plate 5 is maintained in a position that cooperates with the third steel plate 23, thereby preventing the cover plate 5 from shifting during welding.

[0033] Please refer to Figure 3 、 Figure 4 and Figure 8 The flat plate portion 31 is provided with a limiting frame 34, and the mounting portion 51 is located within the space enclosed by the limiting frame 34. The limiting frame 34 is filled with a second mortar layer, and the second mortar layer covers the mounting portion 51. After the mounting portion 51 is mounted on the flat plate portion 31, mortar is filled into the limiting frame 34 to form the second mortar layer. The mounting portion 51 is embedded in the second mortar layer, which can further improve the connection strength between the cover plate 5 and the embedded part 3. Furthermore, after the cover plate 5 is welded to the third steel sheet, the stability of the connection between the precast beam 2 and the precast column 1 can be enhanced, making the beam-column connection node of the prefabricated frame of the factory building more reliable.

[0034] Example 2

[0035] like Figure 9 As shown, the second embodiment of the present invention proposes a method for constructing a factory building assembled frame beam-column connection node, based on the factory building assembled frame beam-column connection node of the first embodiment, including the following steps:

[0036] S1. Prefabricated columns and prefabricated beams are manufactured. When the prefabricated columns are cast, corbels are formed on the prefabricated columns and a first steel plate and embedded parts are embedded on the corbels. When the prefabricated beams are cast, a second steel plate and a third steel plate are embedded on the prefabricated beams.

[0037] S2. Install the prefabricated column and install the two clamping components onto the flat plate portion of the embedded part.

[0038] S3. Hoist the prefabricated beam onto the prefabricated column so that the butt joint of the corbel is inserted into the positioning groove, and rotate the locking nut so that the pressing block extends into the positioning groove on the third steel plate while pressing the end of the prefabricated beam onto the corbel.

[0039] In step S3, before the precast beam is hoisted and connected to the corbel, mortar is applied on the inclined surface of the connecting portion, so that a first mortar layer for bonding is formed between the connecting portion and the precast beam after the precast beam and the corbel are combined.

[0040] S4. Weld the first steel plate and the second steel plate to form a weld between the first steel plate and the second steel plate. After the first steel plate and the second steel plate are welded, remove the clamping assembly from the flat plate and install a cover plate on the flat plate. Then weld the cover plate and the third steel plate to form welds between both sides of the cover plate and the third steel plate.

[0041] In step S4, after the mounting portion on the cover plate is mounted on the flat plate portion, mortar is filled into the limiting frame on the flat plate portion to form a second mortar layer, and the mounting portion is buried in the second mortar layer.

[0042] S5. Perform rust-proofing treatment on the exposed surfaces of the first steel plate, the second steel plate, the third steel plate and the cover plate.

[0043] In step S5, the anti-rust treatment can be carried out by brushing anti-rust paint on the exposed surfaces of the first steel plate, the second steel plate, the third steel plate and the cover plate, thereby slowing down the rusting of the first steel plate, the second steel plate, the third steel plate and the cover plate, which is beneficial to extending the life of the connection nodes of the prefabricated frame beams and columns of the factory building.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A factory building assembled frame beam-column connection node, comprising a prefabricated column and a prefabricated beam, wherein the prefabricated column is provided with a corbel, characterized in that: The corbel has a butt joint and a first steel plate is embedded in the edge of the butt joint. A positioning groove is provided at the end of the precast beam to match the butt joint. A second steel plate is embedded in the edge of the positioning groove and the second steel plate is fitted with the first steel plate. An embedded part is also provided on the top of the corbel. The embedded part includes a flat plate portion, and the flat plate portion is located between the corbel and the precast beam and extends to both sides of the precast beam. Two clamping assemblies are spaced apart on the flat plate portion and the two clamping assemblies are respectively located on opposite sides of the precast beam. The clamping assembly includes a seat body detachably connected to the flat plate portion, and a rotatable A movable pressure block, a rotatable locking screw and a locking nut matching the locking screw, the rotating axis of the pressure block and the rotating axis of the locking screw are spaced apart and the pressure block is provided with a slot for the locking screw to pass through, the locking nut abuts against the side of the pressure block away from the seat body, a third steel plate is embedded in the side of the prefabricated beam away from the corbel and the third steel plate has a groove, the pressure block extends into the groove and abuts against the third steel plate; a cover plate is also provided on the embedded part, both ends of the cover plate are respectively fixedly connected to the flat plate part and part of the cover plate abuts against the side of the prefabricated beam away from the corbel and fills the groove.

2. The factory building assembled frame beam-column connection node according to claim 1, characterized in that: The butting portion has an inclined surface, the inclined surface is in contact with the positioning groove, and a first mortar layer is filled between the inclined surface and the positioning groove.

3. The factory building assembled frame beam-column connection node according to claim 1, characterized in that: A first steel bar is provided on the first steel plate, and the first steel bar is embedded in the corbel.

4. The factory building assembled frame beam-column connection node according to claim 1, characterized in that: A second steel bar is provided on the second steel plate, and the second steel bar is embedded in the prefabricated beam.

5. The factory building assembled frame beam-column connection node according to claim 1, characterized in that: The embedded parts further include a plurality of inserting plates, which are vertically arranged on the flat plate portion and embedded in the corbel.

6. The factory building assembled frame beam-column connection node according to claim 5, characterized in that: The number of the plugging plates is three, and the three plugging plates are arranged in a T-shape on the flat plate portion.

7. The factory building assembled frame beam-column connection node according to claim 1, characterized in that: Two through holes are provided on the flat plate portion at intervals, and the two through holes are respectively located on opposite sides of the prefabricated beam. A first threaded rod and a first nut matching the first threaded rod are provided on the base body. The first threaded rod passes through the through holes, and the first nut abuts against a side of the flat plate portion away from the base body.

8. The factory building assembled frame beam-column connection node according to claim 7, characterized in that: The opposite ends of the cover are respectively provided with mounting parts that fit with the flat plate part, and the mounting parts are provided with a second threaded rod and a second nut that matches the second threaded rod. The second threaded rod passes through the through hole and the second nut abuts against a side of the flat plate part away from the mounting part.

9. The factory building assembled frame beam-column connection node according to claim 8, characterized in that: A limiting frame is provided on the flat plate portion and the mounting portion is located in a space surrounded by the limiting frame. The limiting frame is filled with a second mortar layer and the second mortar layer covers the mounting portion.

10. A method for constructing beam-column connection nodes of an assembled frame of a factory building, characterized by: The factory building assembled frame beam-column connection node according to any one of claims 1 to 9 comprises the following steps: S1. Prefabricated columns and prefabricated beams are manufactured. When the prefabricated columns are cast, a corbel is formed on the prefabricated columns and a first steel plate and embedded parts are embedded on the corbel. When the prefabricated beams are cast, a second steel plate and a third steel plate are embedded on the prefabricated beams. S2. Install the prefabricated column and install the two pressing assemblies on the flat plate portion of the embedded part; S3. Hoist the precast beam onto the precast column so that the butt joint of the corbel is inserted into the positioning groove, and rotate the locking nut so that the pressing block extends into the positioning groove on the third steel plate while pressing the end of the precast beam onto the corbel; S4. Welding the first steel plate and the second steel plate together to form a weld between the first steel plate and the second steel plate. After the first steel plate and the second steel plate are welded together, the pressing assembly is removed from the flat plate portion and a cover plate is installed on the flat plate portion. The cover plate is then welded together with the third steel plate to form welds between both sides of the cover plate and the third steel plate. S5. Perform rust-proofing treatment on the exposed surfaces of the first steel plate, the second steel plate, the third steel plate and the cover plate.

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