A precast concrete beam-column connection structure and its construction method

Abstract

This application provides a precast concrete beam-column connection structure and its construction method, relating to the field of engineering construction. It includes a precast concrete beam and a precast concrete column. A connecting plate extending along the length of the precast concrete beam is pre-embedded within the precast concrete column, extending to the outside of the precast concrete column. A through groove is provided on one end face of the precast concrete beam facing the precast concrete column. An operating port is provided at the top of the precast concrete beam, communicating with the through groove. The connecting plate is inserted into the through groove, and locking bolts pass through the operating port and lock the connecting plate. The top of the connecting plate has a receiving groove and several through holes. A locking pin is provided in the receiving groove, passing through the operating hole and extending to the outside of the precast concrete beam. Several locking bolts are screwed into the several through holes respectively and correspondingly. This application has the effect of improving the reliability and durability of the connection between the precast beam and the precast column.

Description

Technical Field

[0001] This application relates to the field of engineering construction, and in particular to a precast concrete beam-column connection node structure, and also to a construction method for the precast concrete beam-column connection node structure. Background Technology

[0002] Currently, prefabricated concrete construction is developing very rapidly in China, with various regions vigorously promoting the application of prefabricated technology. This involves prefabricating various concrete components in factories and then transporting them to the site for installation. Compared with traditional cast-in-place structures, it has advantages such as being less affected by weather conditions, shorter construction period, faster construction speed, and labor savings.

[0003] Currently, the design and installation of precast beams and columns in prefabricated frame structures place great emphasis on the robustness and durability of the connection nodes between them. Existing connection methods for precast beam and column nodes mainly include dry connection and wet connection. Dry connection involves directly using connecting components pre-embedded in the precast beams and columns, offering the advantage of rapid construction. Wet connection involves setting up formwork on-site and pouring concrete using pre-reinforced steel bars at the joint.

[0004] However, when using dry connection, some parts of the connecting components will be exposed, which will lead to the risk of corrosion of the connecting components and have a significant impact on the connection stability of precast beams and precast columns. When using wet connection, too many formworks need to be erected and the requirements for concrete pouring are higher, which in turn prolongs the construction period. Summary of the Invention

[0005] To improve the reliability and durability of precast beam and column connections, this application provides a precast concrete beam-column connection structure and its construction method.

[0006] In a first aspect, this application provides a precast concrete beam-column connection node structure, which adopts the following technical solution:

[0007] A precast concrete beam-column connection node structure includes a precast concrete beam and a precast concrete column, wherein a connecting plate extending along the length direction of the precast concrete beam is pre-embedded in the precast concrete column, and the connecting plate extends to the outside of the precast concrete column.

[0008] The precast concrete beam has a through groove on one end face facing the precast concrete column, and an operating port is provided on the top of the precast concrete beam. The operating port is connected to the through groove, the connecting plate is inserted into the through groove, and the locking bolt passes through the operating port and locks the connecting plate.

[0009] By adopting the above technical solution, the through groove of the precast concrete beam is fitted onto the outside of the connecting plate, realizing the initial assembly of the precast concrete column and the precast concrete beam. Then, the locking bolt is screwed into the connecting plate through the operating port, and finally, concrete is poured into the operating hole. In this way, the concrete in the operating port can fix the locking bolt. After the pouring is completed, the outer walls of the precast concrete beam and the precast concrete column are in a flat state. Only the gap between the precast concrete beam and the precast concrete column needs to be sealed to achieve reliable assembly of the precast concrete beam and the precast concrete column. This ensures that the connection node between the two will not be corroded, has high durability, and the overall structure is more solid.

[0010] Optionally, the top of the connecting plate is provided with a receiving groove and several through holes, and a locking pin is provided in the receiving groove. The locking pin passes through the operating hole and extends to the outside of the precast concrete beam; several locking bolts are screwed into several through holes respectively and in a one-to-one correspondence.

[0011] By adopting the above technical solution, after the precast concrete beam is fitted onto the outside of the connecting plate, a locking pin is inserted to prevent the precast concrete beam from detaching from the connecting plate, thus playing a preliminary fixing role. After the locking bolt is inserted into the hole, it can play a vertical connection and reinforcement role for the connecting plate. After the concrete seals the operating opening, the locking action of the locking bolt can make the precast concrete beam more resistant to compression and bending.

[0012] Optionally, the sidewall of the locking pin is fitted to the inner wall of the operating port.

[0013] By adopting the above technical solution, the locking pin has a better locking effect on the precast concrete beam. Moreover, after the locking pin is in contact with the inner wall of the operating port, it can leave more space for the locking bolt to be screwed into the through hole, ensuring that the precast concrete beam will not move and detach from the connecting plate during the process of screwing the locking bolt into the connecting plate.

[0014] Optionally, a pair of U-shaped steel bars are pre-embedded in the precast concrete column. One end of the pair of steel bars is welded to both sides of the connecting plate, and a first clamping plate is welded to the other end of the pair of steel bars. A fixing plate is provided on one side of the connecting plate inside the precast concrete column. The first clamping plate is arranged opposite to the fixing plate and is tightened by tension bolts.

[0015] By adopting the above technical solution, before the precast concrete column is poured, a first clamping plate is set with steel bars, and the first clamping plate and the fixing plate are tightened by tightening bolts. This makes the steel bars, the fixing plate and the first clamping plate form a reliable connected skeleton. In this way, after the precast concrete column is poured, the connecting plate can withstand a large weight. That is to say, the connecting plate can support the precast concrete beam without causing damage to the precast concrete column, thus ensuring the firmness of the connection node.

[0016] Optionally, a second clamping plate is welded to one end of the pair of reinforcing bars that connects to the connecting plate. The second clamping plate is provided with a pair of inserts on the side facing the precast concrete beam, and the inserts extend to the outside of the precast concrete column.

[0017] The slot is provided with a fixing seat at the opening of the slot, and the fixing seat has a hole on the side facing the precast concrete column. A pair of the insertion rods are inserted into a pair of holes respectively and in a one-to-one correspondence.

[0018] By adopting the above technical solution, one end of the insert rod is connected to the second clamping plate, and the other end of the insert rod extends to the outside of the precast concrete column. The length of the part of the insert rod located on the outside of the precast concrete column is less than the depth of the insertion hole on the fixing seat. In this way, after the insert rod is inserted into the insertion hole, it can play an auxiliary connection role, reduce the pressure exerted by the precast concrete beam on the connecting plate, and prevent fatigue of the connecting plate. At the same time, the first clamping plate and the second clamping plate are located at both ends of the U-shaped steel bar. The setting of the insert rod can make the steel bar in a state of stress balance, ensuring that the steel bar can strengthen the strength of the precast concrete column after it is poured.

[0019] Optionally, the second insert plate and the reinforcing bar, as well as the second insert plate and the connecting plate, are all welded structures.

[0020] By adopting the above technical solution, the connecting plate, reinforcing bars, first clamping plate, second clamping plate and tightening bolts form a reliable whole, which further improves the reliability of the frame in fixing the connecting plate in the precast concrete column. This ensures that the connection nodes of the precast concrete beam and precast concrete column are stable and durable after being connected by the connecting plate, and will not cause phenomena such as bending of the precast concrete beam or tilting of the precast concrete column.

[0021] Optionally, the fixing seat is provided with a number of anchor rods on the side facing away from the precast concrete column, and the length of the anchor rods is greater than the length of the part of the connecting plate located inside the precast concrete beam.

[0022] By adopting the above technical solution, the anchor rod is aligned with the length direction of the precast concrete beam, which can strengthen the precast concrete beam in the horizontal direction, prevent the precast concrete beam from bending under gravity, and increase the overall structural strength, ensuring that the connection between the precast concrete beam and the precast concrete column is in a stable state.

[0023] Optionally, the precast concrete beam is provided with a pair of reinforcing seats, which are located on both sides of the connecting plate and are fixed to the anchor rod.

[0024] By adopting the above technical solution, the locking bolt can pass through a reinforcing seat, a connecting plate and another reinforcing seat in sequence. In this way, under the reinforcing effect of the reinforcing seat, the vertical connection and reinforcing effect of the locking bolt on the connecting plate is improved, which can ensure that the reaction force exerted by the connecting plate on the precast concrete beam will not cause the precast concrete beam to bend or break, and ensure that the connection node is in a firm and durable state.

[0025] Secondly, this application provides a construction method for a precast concrete beam-column connection structure, employing the following technical solution:

[0026] A construction method for a precast concrete beam-column connection structure includes the following steps:

[0027] S1. Set up several templates to form the first casting box, and insert the connecting plate into the first casting box from the side, and adjust the length of the connecting plate inside the first casting box and outside the second casting box.

[0028] S2. Weld a fixing plate to one end face of the connecting plate located in the first casting box, and weld a steel bar to the other two sides of the connecting plate located in the first casting box. Weld the first clamping plate and the second clamping plate onto the steel bar, and then pass the tension bolt between the first clamping plate and the fixing plate and lock it. Then weld the insert rod onto the second clamping plate.

[0029] S3. Pour concrete into the first pouring box to complete the pouring of the precast concrete column.

[0030] S4. Several templates are set up to form a second casting box. A kit that matches the shape of the connecting plate is placed on the inner wall of the second casting box. The opening of the kit fits the inner wall of the second casting box. The top of the kit has a notch for placing a fixing seat. A sleeve is fixed above the second casting box by a cable tie. The sleeve is connected to the kit. An anchor rod is welded on the fixing seat. The anchor rod is located outside the sleeve.

[0031] S5. Pour concrete into the second pouring box. Before the concrete solidifies, pull out the sleeve and kit. Then weld the reinforcing seat between the anchor rods and open the threaded hole on the reinforcing seat. The precast concrete beam is now poured.

[0032] S6. Place the through groove of the precast concrete beam on the outside of the connecting plate, then insert the locking pin into the receiving groove, and then screw the locking bolt into the reinforcing seat through the operating port. Pull out the locking pin, pour concrete into the operating port, and use the concrete to seal the gap between the precast concrete column and the precast concrete beam. The construction is now complete.

[0033] By adopting the above technical solution, under the connection of the reinforcing bars, the first clamping plate, the second clamping plate, the fixing plate, and the tensioning bolts form a solid and balanced skeleton structure on the connecting plate. In this way, after the precast concrete column is poured, the concrete can form a tight connection with the skeleton structure, thereby giving the precast concrete column sufficient strength to fix the connecting plate. Furthermore, the connection of the connecting plate ensures that the connection node between the precast concrete beam and the precast concrete column is in a high-strength state, eliminating the need for large-area on-site pouring and improving the construction speed.

[0034] The reinforcing seat has threaded holes, and a number of threaded holes on the reinforcing seat correspond one-to-one with a number of through holes on the connecting plate.

[0035] By adopting the above technical solution, it is easier to screw the locking bolt into the threaded hole of the reinforcing seat and the through hole of the connecting plate, thereby improving the connection strength between the precast concrete beam and the connecting plate.

[0036] In summary, this application has the following beneficial effects:

[0037] 1. The first and second clamping plates are connected by a pair of U-shaped steel bars. A fixing plate is set on the connecting plate and connected to the first clamping plate by tension bolts. The second clamping plate is welded to the connecting plate. In this way, the connecting plate, steel bars, first clamping plate, second clamping plate, fixing plate and tension bolts can reliably enhance the strength of the precast concrete column after pouring, and ensure that the connection node between the precast concrete beam and the precast concrete column is in a firm state.

[0038] 2. The engagement of the locking pin and the receiving groove enables the initial fixing of the precast concrete beam after it is fitted into the connecting plate. This facilitates the insertion of locking bolts into the connecting plate through the operating port, followed by the removal of the locking pin and the pouring of concrete into the operating port, thereby improving the flatness of the outer wall of the precast concrete beam. Attached Figure Description

[0039] Figure 1 This is a schematic perspective view of this application;

[0040] Figure 2 This is a reference for the uncast state of the precast concrete column in this application. Figure 1 ;

[0041] Figure 3 This is a reference for the uncast state of the precast concrete column in this application. Figure 2 ;

[0042] Figure 4 This is a reference diagram of the precast concrete beam in its uncast state in this application;

[0043] Figure 5 yes Figure 4 Enlarged structural diagram at point A;

[0044] In the diagram: 1. Precast concrete beam; 11. Through groove; 12. Operating port; 13. Locking bolt; 14. Fixing seat; 140. Insertion hole; 15. Anchor rod; 16. Reinforcing seat; 2. Precast concrete column; 21. Reinforcing bar; 22. First clamping plate; 23. Fixing plate; 24. Tensioning bolt; 25. Second clamping plate; 26. Insertion rod; 3. Connecting plate; 31. Receiving groove; 32. Locking pin; 33. Through hole. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0046] This embodiment discloses a precast concrete beam-column connection node structure.

[0047] Figure 1 This is a schematic perspective view of this application. Figure 2 This is a reference for the uncast state of the precast concrete column in this application. Figure 1 See also Figure 1 and Figure 2 A precast concrete beam-column connection structure includes a precast concrete beam 1 and a precast concrete column 2 connected by a connecting plate 3. One end of the connecting plate 3 is embedded in the precast concrete column 2 and extends towards the precast concrete beam 1. A fixing plate 23 is provided on one end face of the connecting plate 3. A pair of U-shaped steel bars 21 are provided on one end of the connecting plate 3. The pair of steel bars 21 are respectively provided on both sides of one end of the connecting plate 3. One straight end of the steel bar 21 is welded to the connecting plate 3, and the other straight end of the steel bar 21 is suspended. A first clamping plate 22 is welded between the other straight ends of the two steel bars 21, and a second clamping plate 25 is welded between the one straight ends of the two steel bars 21. The fixing plate 23... The first clamping plate 22 is connected to the second clamping plate 25 by a tension bolt 24. A plug rod 26 is welded on the second clamping plate 25. The plug rod 26 extends outward toward the precast concrete column 2 and is in the same direction as the extension of the connecting plate 3. The length of the plug rod 26 on the outside of the precast concrete beam 1 is slightly less than the depth of the plug hole 140. This ensures that when the plug rod 26 is inserted into the plug hole 140, the outer wall of the precast concrete beam 1 and the outer wall of the precast concrete column 2 can be in a close fit with each other, which facilitates the sealing of the gap between the precast concrete beam 1 and the precast concrete column 2 in the later stage.

[0048] Figure 3 This is a reference for the uncast state of the precast concrete column in this application. Figure 2 See also Figure 3Before pouring the precast concrete column 2, the reinforcing bars 21, the first clamping plate 22, the second clamping plate 25, and the fixing plate 23 are welded together based on the connecting plate 3. The first clamping plate 22 and the fixing plate 23 are tightened by tightening nuts, so that a balanced and stable skeleton is formed inside the precast concrete column 2. After the concrete is poured and forms a wrapping effect on the skeleton, the overall strength of the precast concrete column 2 is improved. At the same time, the fixing of the connecting plate 3 to the precast concrete column 2 is more reliable. In this way, after the precast concrete beam 1 and the precast concrete column 2 are connected, the precast concrete beam 1, the precast concrete column 2, and the connecting plate 3 can all be in a stable state. That is, the precast concrete beam 1 will not bend, the precast concrete column 2 will not tilt, and the connecting plate 3 will not detach from the precast concrete beam 1 or the precast concrete column 2. This ensures that the connection node between the precast concrete beam 1 and the precast concrete column 2 is firm and reliable.

[0049] Figure 4 This is a reference diagram of the precast concrete beam in its uncast state in this application. Figure 5 yes Figure 4 A magnified structural diagram at point A. See also Figure 4 and Figure 5 A through groove 11 is provided on one end face of the precast concrete beam 1 facing the precast concrete column 2. An operating port 12 is reserved on the top of the precast concrete beam 1. The operating port 12 is connected to the through groove 11. A fixing seat 14 is provided at the groove opening of the through groove 11. The end face of the fixing seat 14 is flush with the groove opening of the through groove 11. An insertion hole 140 is provided on the end face of the fixing seat 14. Multiple anchor rods 15 are provided on one side opposite to the end face of the fixing surface. The length of the anchor rod 15 is greater than the length of the connecting plate 3 inside the precast concrete beam 1, and the anchor rod 15 extends along the length direction of the connecting plate 3. A reinforcing seat 16 is provided on the anchor rod 15. The reinforcing seat 16 is provided with threaded holes corresponding to the through holes 33. When the precast concrete beam 1 is connected to the precast concrete column 2, the connecting plate 3 is inserted into the through groove 11, the insert rod 26 is inserted into the insertion hole 140, and then the locking pin 32 is inserted into the receiving groove 31 at the top of the connecting plate 3, which can achieve the initial fixation of the precast concrete beam 1 and the connecting plate 3. Then, the locking bolt 13 is inserted into the through hole 33 at the top of the connecting plate 3 and the threaded hole of the reinforcing seat 16 (the through hole 33 and the receiving groove 31 are located on the same side of the connecting plate 3, and a pair of reinforcing seats 16 are located on the upper and lower sides of the connecting plate 3 respectively), which achieves the locking effect of the connecting plate 3.

[0050] Then, pull out the locking pin 32, exposing the receiving groove 31. Then, pour concrete into the operating port 12. The concrete will fill the operating port 12, wrap around the locking bolt 13, and flow into the receiving groove 31. In this way, under the strengthening effect of the locking bolt 13, a stable connection will be formed between the precast concrete beam 1 and the connecting plate 3. At the same time, when the locking pin 32 is pulled out and the receiving groove 31 is filled with concrete, the concrete will strengthen the connection between the precast concrete beam 1 and the connecting plate, ensuring that the connection node between the precast concrete beam 1 and the precast concrete column 2 is in a firm state. Moreover, after the concrete fills the operating port 12, the flatness of the outer wall of the precast concrete beam 1 is improved. Only the connection gap between the precast concrete beam 1 and the precast concrete column 2 needs to be sealed to achieve a reliable connection between the two. This avoids the excessive operation steps caused by setting up formwork and pouring on site, and effectively reduces the construction cycle while ensuring the connection strength.

[0051] This embodiment also discloses a construction method for a precast concrete beam-column connection node structure.

[0052] A construction method for a precast concrete beam-column connection structure includes the following steps:

[0053] S1. Set up several templates to form the first casting box, make holes on the side of the first casting box, insert the connecting plate 3 into the inside of the first casting box through the holes, adjust the length of the connecting plate 3 inside the first casting box and outside the second casting box, and then use cable ties or other items to initially fix the connecting plate 3.

[0054] S2. Weld a fixing plate 23 to one end face of the connecting plate 3 located inside the first casting box. Weld a steel bar 21 to the other two sides of the connecting plate 3 located inside the first casting box. Weld the first clamping plate 22 and the second clamping plate 25 to the steel bar 21 (the two sides of the first clamping plate 22 are welded to the vertical ends of the two steel bars 21 on the same side, and the two sides of the second clamping plate 25 are welded to the vertical ends of the two steel bars 21 on the other side). Then, pass the tension bolt 24 between the first clamping plate 22 and the fixing plate 23 and lock it, so that the first clamping plate 22 and the fixing plate 23 tend to move closer to each other. In this way, the steel bar 21 will be in a taut state that is about to bend. Then, weld the insert rod 26 to the second clamping plate 25. In this way, a solid skeleton of the whole structure is formed inside the first casting box.

[0055] S3. Pour concrete into the first pouring box to form a wrapping effect on the skeleton. In this way, after the precast concrete beam 1 is poured, its strength is sufficient to fix the connecting plate 3 and ensure that the connecting plate 3 will not detach from the precast concrete column 2.

[0056] S4. Several templates are erected to form a second pouring box. A kit that matches the shape of the connecting plate 3 is placed on the inner wall of the second pouring box. The opening of the kit fits the inner wall of the second pouring box to prevent concrete from entering the inside of the kit during the pouring process. The top of the kit has a notch for placing the fixing seat 14. At the same time, a fixing rod is screwed into the outside of the second pouring box to lock the fixing seat 14. A sleeve is fixed above the second pouring box by a cable tie. The sleeve is connected to the kit. An anchor rod 15 is welded on the fixing seat 14. The anchor rod 15 is located outside the sleeve.

[0057] S5. Pour concrete into the second pouring box. Before the concrete solidifies, pull out the sleeve and kit. In this way, a through groove 11 and an operating port 12 are formed on the precast concrete beam 1, and the through groove 11 and the operating port 12 are in a connected state. Then, weld the reinforcing seat 16 between the anchor rods 15 and open the threaded hole on the reinforcing seat 16. The threaded hole is coaxial with the through hole 33 on the connecting plate 3 to facilitate the screwing in of the locking bolt 13. The precast concrete beam 1 is poured.

[0058] S6. Place the through groove 11 of the precast concrete beam 1 onto the outside of the connecting plate 3, and then insert the locking pin 32 into the receiving groove 31 to achieve initial fixation of the precast concrete beam 1. Then, screw the locking bolt 13 into the reinforcing seat 16 through the operating port 12, and then pull out the locking pin 32. Pour concrete into the operating port 12 so that the concrete fills the operating port 12 and the receiving groove 31, and wraps the locking bolt 13. In this way, the flatness of the outer wall of the precast concrete beam 1 is improved, and the concrete fills the receiving groove 31 and strengthens the locking bolt 13. Using this method, reliable fixing of the connecting plate 3 to the precast concrete beam 1 can be achieved. Finally, the gap between the precast concrete column 2 and the precast concrete beam 1 is sealed with concrete, ensuring that no connecting components are exposed. This also prevents damage to the connection joint between the precast concrete beam 1 and the precast concrete column 2 due to corrosion of the connecting components, ensuring the high durability of the connection joint. Moreover, there is no need to set up formwork again on site or pour a large amount of concrete, which simplifies the construction steps, effectively improves construction efficiency, and reduces the construction cycle.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precast concrete beam-column connection structure, comprising a precast concrete beam (1) and a precast concrete column (2), characterized in that, The precast concrete column (2) is pre-embedded with a connecting plate (3) extending along the length of the precast concrete beam (1), and the connecting plate (3) extends to the outside of the precast concrete column (2). The precast concrete beam (1) has a through groove (11) on one end face facing the precast concrete column (2), and the top of the precast concrete beam (1) has an operating port (12). The operating port (12) is connected to the through groove (11), the connecting plate (3) is inserted into the through groove (11), and the locking bolt (13) passes through the operating port (12) and locks the connecting plate (3). The top of the connecting plate (3) is provided with a receiving groove (31) and a plurality of through holes (33). A locking pin (32) is provided in the receiving groove (31). The locking pin (32) passes through the operating port (12) and extends to the outside of the precast concrete beam (1). A plurality of locking bolts (13) are screwed into the plurality of through holes (33) respectively and in a one-to-one correspondence. The side wall of the locking pin (32) is in contact with the inner wall of the operating port (12).

2. The precast concrete beam-column connection node structure according to claim 1, characterized in that, A pair of U-shaped steel bars (21) are pre-embedded in the precast concrete column (2). One end of the pair of steel bars (21) is welded to both sides of the connecting plate (3). A first clamping plate (22) is welded to the other end of the pair of steel bars (21). A fixing plate (23) is provided on one side end of the connecting plate (3) inside the precast concrete column (2). The first clamping plate (22) and the fixing plate (23) are arranged opposite to each other and are tightened by a tension bolt (24).

3. The precast concrete beam-column connection node structure according to claim 2, characterized in that, A second clamping plate (25) is welded to one end of the pair of steel bars (21) connected to the connecting plate (3). A pair of insert rods (26) are provided on the side of the second clamping plate (25) facing the precast concrete beam (1). The insert rods (26) extend to the outside of the precast concrete column (2). The slot (11) is provided with a fixing seat (14) at the opening. The fixing seat (14) is provided with a hole (140) on the side facing the precast concrete column (2). A pair of the insertion rods (26) are respectively and correspondingly inserted into a pair of insertion holes (140).

4. The precast concrete beam-column connection node structure according to claim 3, characterized in that, The second clamping plate (25) and the steel bar (21) and the second clamping plate (25) and the connecting plate (3) are both welded structures.

5. A precast concrete beam-column connection node structure according to claim 3, characterized in that, The fixing seat (14) is provided with several anchor rods (15) on the side facing away from the precast concrete column (2), and the length of the anchor rods (15) is greater than the length of the part of the connecting plate (3) located inside the precast concrete beam (1).

6. A precast concrete beam-column connection node structure according to claim 5, characterized in that, The precast concrete beam (1) is provided with a pair of reinforcing seats (16), which are located on both sides of the connecting plate (3) and are fixed on the anchor rod (15).

7. A construction method for a precast concrete beam-column connection structure, characterized in that, Includes the following steps: S1. Set up several templates to form the first casting box, and insert the connecting plate (3) into the first casting box from the side, and adjust the length of the connecting plate (3) inside the first casting box and outside the second casting box. S2. Weld a fixing plate (23) to one end face of the connecting plate (3) located in the first casting box. Weld a steel bar (21) to the other two sides of the connecting plate (3) located in the first casting box. Then weld the first clamping plate (22) and the second clamping plate (25) onto the steel bar (21). Then pass the tension bolt (24) between the first clamping plate (22) and the fixing plate (23) and lock it. Then weld the insert rod (26) onto the second clamping plate (25). S3. Pour concrete into the first pouring box, and the precast concrete column (2) is poured. S4. Several templates are set up to form a second casting box. A kit that matches the shape of the connecting plate (3) is placed on the inner wall of the second casting box. The opening of the kit fits the inner wall of the second casting box. The top of the kit has a notch for placing the fixing seat (14). A sleeve is fixed above the second casting box by a cable tie. The sleeve is connected to the kit. An anchor rod (15) is welded on the fixing seat (14). The anchor rod (15) is located outside the sleeve. S5. Pour concrete into the second pouring box. Before the concrete solidifies, pull out the sleeve and kit. Then weld the reinforcing seat (16) between the anchor rods (15) and open the threaded hole on the reinforcing seat (16). The precast concrete beam (1) is poured. S6. Place the through groove (11) of the precast concrete beam (1) on the outside of the connecting plate (3), then insert the locking pin (32) into the receiving groove (31), and then screw the locking bolt (13) into the reinforcing seat (16) through the operating port (12). Pull out the locking pin (32), pour concrete into the operating port (12), and use the concrete to seal the gap between the precast concrete column (2) and the precast concrete beam (1). The construction is completed.

8. A construction method for a precast concrete beam-column connection joint structure according to claim 7, characterized in that, The reinforcing seat (16) is provided with threaded holes, and a number of threaded holes on the reinforcing seat (16) correspond one-to-one with a number of through holes (33) on the connecting plate (3).

Images