A precast beam-column joint connection structure

Abstract

The application discloses a precast beam-column joint connecting structure, which comprises a second connecting piece preburied in a precast column and a first connecting piece preburied in a precast beam, the first connecting piece comprises a first reinforcing steel bar, a first sleeve and a connecting reinforcing steel bar with an outer diameter smaller than an inner diameter of the first sleeve, the first sleeve is connected with the first reinforcing steel bar, one end of the connecting reinforcing steel bar is located in the first sleeve, and the other end extends into the second connecting piece, and an inner support assembly is further arranged in the first sleeve; the precast beam is located on the top of a support piece which can be detachably connected with the second connecting piece, and a driving assembly for driving the inner support assembly to move radially along the first sleeve is arranged on the support piece. The connecting reinforcing steel bar arranged in the application can realize the rapid connection of the joint between the precast beam and the precast column, meanwhile, the connecting reinforcing steel bar arranged in the grouting process can be fully contacted with the grout, and the connecting strength between the precast beam and the precast column is improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a precast beam-column joint connection structure. Background Technology

[0002] In non-steel structure buildings, the most important components are columns, beams, floor slabs, and walls. The structure and shape of columns and beams affect the load-bearing capacity of the entire building and the construction speed. Currently, reinforced concrete beams, which still primarily use concrete as the main structural element, serve two main purposes in concrete structures. First, they act as connecting structures between main components, further reinforcing the building's structure. Second, reinforced concrete beams are also used in low-rise and multi-story frame structures, particularly suitable for low-rise and multi-story frame structures with high floor heights, playing a crucial supporting role. For multi-story frame structures, to better reflect the advantages of prefabricated construction in the construction of large-span, high-rise, and other multi-story frame structures, prefabricated columns, prefabricated beams, prefabricated slabs, and other structural components can be used to achieve formwork-free and support-free prefabrication and assembly construction. Therefore, solving the problem of rebar connection at beam-column joints in intermediate floors is the key to the structure and construction. Currently, in the connection between prefabricated beams and prefabricated columns, grouting sleeves are usually pre-embedded in the prefabricated beams and columns, and then the two ends of the rebar are inserted into the two grouting sleeves respectively. High-strength grout is injected into the grouting sleeves, and after the grout solidifies, the prefabricated beam and prefabricated column are stably connected. However, since the inner diameter of the grouting sleeves is usually larger than the outer diameter of the rebar, the rebar is located at the bottom of the grouting sleeve during the grouting process, which cannot ensure that the rebar is in full contact with the grout, thus making it impossible for the rebar to be stably connected to the grouting sleeve. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. The purpose is to provide a precast beam-column joint connection structure, which can realize the rapid connection between the precast beam and the precast column by using the set connecting steel bars. At the same time, it ensures that the set connecting steel bars can fully contact the grout during the grouting process, thereby improving the connection strength between the precast beam and the precast column.

[0004] This invention is achieved through the following technical solution: A precast beam-column joint connection structure includes a second connector embedded in a precast column and a first connector embedded in a precast beam. The first connector includes a first reinforcing bar, a first sleeve, and a connecting reinforcing bar with an outer diameter smaller than the inner diameter of the first sleeve. The first sleeve is connected to the first reinforcing bar, with one end of the connecting reinforcing bar located inside the first sleeve and the other end extending into the second connector. An internal support assembly is also provided inside the first sleeve. The structure also includes a support member that can be detachably connected to the second connector. The precast beam is located on top of the support member, and the support member is provided with a drive assembly for driving the internal support assembly to move radially along the first sleeve.

[0005] Furthermore, the second connector includes a second reinforcing bar and a second sleeve, both of which are embedded in the precast column. One end of the second sleeve is a closed structure, and the second reinforcing bar is threadedly connected to the closed end of the second sleeve. The connecting reinforcing bar extends into the other end of the second sleeve, and the outer diameter of the connecting reinforcing bar is smaller than the inner diameter of the second sleeve. The support member is connected to the end of the second sleeve located outside the side wall of the precast column.

[0006] Furthermore, the support member includes a horizontal plate and a vertical plate, the horizontal plate being used for vertical connection with the vertical plate, the horizontal plate being located at the bottom of the precast beam, and the vertical plate being located on the outside of the precast column; The top of the horizontal plate is also provided with a connecting unit for detachable connection with the second sleeve.

[0007] Furthermore, the connecting unit includes a protrusion and a connecting plate. The protrusion is fixed to the top of the horizontal plate, and a first blind hole is provided on the side wall of the protrusion. A first elastic element and a locking block are provided in the first blind hole. The side wall of the connecting plate is connected to the second sleeve. The bottom of the connecting plate is provided with a second blind hole with an inner diameter that is the same as the outer diameter of the protrusion. A locking groove is provided on the inner wall of the second blind hole. The protrusion is located in the second blind hole, and the first elastic element is used to push the locking block into the locking groove to fix the protrusion on the connecting plate.

[0008] Furthermore, the inner support assembly includes a support block and a first airbag. The inner wall of the first sleeve is provided with a plurality of grooves, which are distributed along the circumference of the first sleeve. One end of the first airbag is fixed in the groove, and the other end is connected to the support block. A diagonal brace is provided after the horizontal and vertical plates. The drive assembly includes a second airbag that communicates with the first airbag. An adjusting rod is also provided on the diagonal brace. The adjusting rod passes through the diagonal brace and is connected to the movable end of the second airbag. An adjusting nut is also provided on the adjusting rod. The adjusting nut is connected to the adjusting rod by a thread.

[0009] Furthermore, both ends of the inclined brace are provided with a third blind hole, and a second elastic element and a connecting post are provided in the third blind hole. The outer diameter of the connecting post is the same as the inner diameter of the third blind hole. Both the horizontal plate and the vertical plate are provided with a first connecting blind hole. The third elastic element is used to push the connecting post into the first connecting blind hole.

[0010] Furthermore, the second airbag is connected to the third blind hole through the first channel, the top positioning tube of the horizontal plate is connected to the first connecting blind hole through the second channel, and the bottom plate of the precast beam is also provided with a reserved hole connected to the first airbag. The inner diameter of the reserved hole is the same as the outer diameter of the positioning tube. The positioning tube is inserted into the reserved hole to connect the first airbag and the second airbag.

[0011] Furthermore, the adjusting rod is also provided with a movable rod, which passes through the adjusting rod along the adjusting rod axis. The end of the movable rod is also provided with a squeezing plate, and the squeezing plate is also provided with a third airbag, which is located within the right angle formed by the horizontal plate and the vertical plate. The first sleeve is also provided with a fourth airbag, which is connected to the connecting steel bar and is also in communication with the third airbag.

[0012] Furthermore, a second connecting blind hole is provided at the right angle formed by the horizontal plate and the vertical plate, and a connecting tube with an outer diameter that is the same as the inner diameter of the second connecting blind hole is provided on the third airbag, and the connecting tube is inserted into the connecting tube; The protrusion is also provided with a third channel, one end of which is connected to the second connecting blind hole and the second blind hole respectively, and the other end is connected to the first blind hole; the connecting steel bar is also provided with an air tube, one end of which is connected to the fourth airbag and the other end is connected to the second blind hole.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention utilizes the connecting steel bars to connect the first sleeve embedded in the precast beam and the second sleeve embedded in the precast column. The internal support component ensures that the connecting steel bars are suspended in the first and second sleeves, thereby ensuring that the connecting steel bars and the grout can fully contact each other during the grouting process and improving the connection strength at the joint between the precast beam and the precast column. 2. When connecting the precast beam and the precast column node, the present invention utilizes the expanded fourth airbag to drive the connecting steel bar located in the first sleeve to move into the second sleeve, thereby ensuring that the connecting steel bar can have a longer length to extend into the second sleeve, further improving the connection strength between the precast beam and the precast column node. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A magnified structural diagram of section A in the middle; Figure 3 This is a schematic diagram of the structure of the support component of the present invention; Figure 4 This is a schematic diagram of the diagonal brace of the present invention; Figure 5 This is a schematic diagram of the structure when the first sleeve of the present invention is connected to the connecting steel bar.

[0015] The attached diagram shows the markings and corresponding component names: 1. Precast column; 2. Precast beam; 4. Support component; 5. First connector; 6. Second connector; 401. Connecting plate; 402. Protrusion; 403. Locking block; 404. Horizontal plate; 406. Connecting pipe; 407. Third airbag; 408. Vertical plate; 409. Movable rod; 410. Adjusting rod; 411. Diagonal brace plate; 412. Extrusion plate; 413. Second airbag; 414. Connecting column; 415. Adjusting nut; 501. Connecting steel bar; 503. Grouting pipe; 504. First steel bar; 505. Fourth airbag; 506. Support block; 507. First airbag; 509. First sleeve; 601. Second sleeve; 602. Second steel bar. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. Example

[0017] like Figures 1 to 5 As shown, the present invention includes a second connector 6 embedded in a precast column 1 and a first connector 5 embedded in a precast beam 2. The first connector 5 includes a first reinforcing bar 504, a first sleeve 509, and a connecting reinforcing bar 501 with an outer diameter smaller than the inner diameter of the first sleeve 509. The first sleeve 509 is connected to the first reinforcing bar 504. One end of the connecting reinforcing bar 501 is located inside the first sleeve 509, and the other end extends into the second connector 6. An internal support assembly is also provided inside the first sleeve 509. The invention also includes a support 4 that can be detachably connected to the second connector 6. The precast beam 2 is located on top of the support 4. The support 4 is provided with a drive assembly for driving the internal support assembly to move radially along the first sleeve 509.

[0018] In existing technologies, the connection between precast beam 2 and precast column 1 typically involves pre-embedding grouting sleeves in both the precast beam 2 and precast column 1, then placing the two ends of the reinforcing bars into the two grouting sleeves, and finally injecting grout into the sleeves. After the grout solidifies, a rapid connection between the precast beam 2 and precast column 1 is achieved. However, to ensure sufficient connection between the reinforcing bars and the grout in the sleeves, the inner diameter of the grouting sleeves often needs to be larger than the outer diameter of the reinforcing bars. This results in the reinforcing bars being positioned at the bottom of the grouting sleeve under gravity during connection, forcing the grouting sleeve and the reinforcing bars to remain in a constant state of tension. The inability of the contact surface to contact the grout reduces the connection strength between the reinforcing bar and the grouting sleeve. To address this, this technical solution embeds a second connector 6 in the precast column 1 and a first connector 5 in the precast beam 2. A support 4 is also provided on the second connector 6. The support 4 provides temporary support for the precast beam 2 during its connection with the precast column 1, improving the connection efficiency between the precast beam 2 and the precast column 1. This also ensures accurate connection between the precast beam 2 and the precast column 1, thus improving the construction quality between them.

[0019] Meanwhile, in order to ensure that the grout inside the first sleeve 509 can fully contact the grout during the grout injection process, and to avoid contact between the connecting steel bar 501 and the first sleeve 509, an inner support assembly is also provided inside the first sleeve 509. At the same time, a drive assembly for driving the inner support assembly is provided on the support member 4. In this way, the drive assembly can force the inner support assembly to suspend the connecting steel bar 501 inside the first sleeve 509, so that the grout injected into the sleeve can fully contact the connecting steel bar 501. This ensures that after the grout injected into the first sleeve 509 solidifies, the connecting steel bar 501 can be stably connected to the first sleeve 509, thereby improving the connection strength between the precast column 1 and the precast beam 2.

[0020] The second connector 6 includes a second reinforcing bar 602 and a second sleeve 601. Both the second reinforcing bar 602 and the second sleeve 601 are embedded in the precast column 1. One end of the second sleeve 601 is a closed structure. The second reinforcing bar 602 is threadedly connected to the closed end of the second sleeve 601. The connecting reinforcing bar 501 extends into the other end of the second sleeve 601, and the outer diameter of the connecting reinforcing bar 501 is smaller than the inner diameter of the second sleeve 601. The support 4 is connected to the end of the second sleeve 601 located outside the side wall of the precast column 1.

[0021] In this embodiment, in order to ensure that the second connector 6 can be stably connected to one end of the connecting steel bar 501, the second connector 6 includes a second steel bar 602 and a second sleeve 601. The second steel bar 602, which is pre-embedded in the precast column 1, can be stably connected to one end of the second sleeve 601. In this way, when connecting the precast beam 2 and the precast column 1, under the action of the internal support component, when one end of the connecting steel bar 501 is suspended in the first sleeve 509, the other end of the connecting steel bar 501 can also be suspended in the second sleeve 601, so that both ends of the connecting steel bar 501 can be fully in contact with the grout, ensuring that both ends of the connecting steel bar 501 can be stably connected to the first sleeve 509 and the second sleeve 601.

[0022] The support member 4 includes a horizontal plate 404 and a vertical plate 408. The horizontal plate 404 is used for vertical connection with the vertical plate 408. The horizontal plate 404 is located at the bottom of the precast beam 2, and the vertical plate 408 is located on the outside of the precast column 1. The top of the horizontal plate 404 is also provided with a connecting unit for detachable connection with the second sleeve 601.

[0023] In this embodiment, in order to ensure that the support member 4 can provide temporary support for the precast beam 2 during the connection process between the precast beam 2 and the precast column 1, the support member 4 includes a horizontal plate 404 and a vertical plate 408. The horizontal plate 404 is used to support the precast beam 2, thereby providing temporary support for the precast beam 2 and facilitating the quick connection between the precast beam 2 and the precast column 1. At the same time, the horizontal plate 404 can be connected to the second sleeve 601, thereby fixing the support member 4 to one side of the precast column 1.

[0024] The connecting unit includes a protrusion 402 and a connecting plate 401. The protrusion 402 is fixed to the top of the horizontal plate 404. A first blind hole is provided on the side wall of the protrusion 402. A first elastic element and a locking block 403 are provided in the first blind hole. The side wall of the connecting plate 401 is connected to the second sleeve 601. A second blind hole with an inner diameter that is the same as the outer diameter of the protrusion 402 is provided at the bottom of the connecting plate 401. A locking groove is provided on the inner wall of the second blind hole. The protrusion 402 is located in the second blind hole, and the first elastic element is used to push the locking block 403 into the locking groove to fix the protrusion 402 on the connecting plate 401.

[0025] In this embodiment, to ensure that the support member 4 can be detachably connected to the second sleeve 601, and to facilitate the disassembly of the support member 4 after the precast beam 2 and precast column 1 are stably connected, a protrusion 402 is provided on the top of the horizontal plate 404. A first elastic member and a locking block 403 are provided on the protrusion 402. The elastic force generated by the first elastic member can push the locking block 403 to be inserted into the connecting plate 401 connected to the second sleeve 601, thereby realizing the connection between the connecting plate 401 and the protrusion 402. When it is necessary to remove the protrusion 402 from the connecting plate 401, the first elastic member is pulled back, causing the locking block 403 to retract from the locking groove, thereby quickly removing the protrusion 402 from the second blind hole of the connecting plate 401, achieving the purpose of removing the support member 4 from the side wall of the precast column 1.

[0026] The inner support assembly includes a support block 506 and a first airbag 507. The inner wall of the first sleeve 509 is provided with several grooves, which are distributed circumferentially along the first sleeve 509. One end of the first airbag 507 is fixed in the groove, and the other end is connected to the support block 506. After the horizontal plate 404 and the vertical plate 408, a diagonal support plate 411 is also provided. The driving assembly includes a second airbag 413 that communicates with the first airbag 507. An adjusting rod 410 is also provided on the diagonal support plate 411. The adjusting rod 410 passes through the diagonal support plate 411 and is connected to the movable end of the second airbag 413. An adjusting nut 415 is also provided on the adjusting rod 410. The adjusting nut 415 is connected to the adjusting rod 410 by threads.

[0027] In this embodiment, to ensure that the inner support assembly can temporarily support the connecting steel bar 501 located inside the first sleeve 509, suspending it within the first sleeve 509, the inner support assembly includes a support block 506 and a first airbag 507. To ensure that the first airbag 507 can inflate and expand, thereby pushing the support block 506 to suspend the connecting steel bar 501 within the first sleeve 509, the expulsion assembly includes a second airbag 413. When it is necessary to inflate the first airbag 507, it rotates... The adjusting nut 415 is rotated so that it drives the adjusting rod 410 to retract towards the second airbag 413. During the retraction process, the adjusting rod 410 compresses the second airbag 413, thereby transferring the air inside the second airbag 413 to the first airbag 507. This forces the first airbag 507 to expand, pushing the support block 506 located in the groove out and suspending the connecting steel bar 501. This ensures that the grout subsequently injected into the first sleeve 509 can fully contact the connecting steel bar 501.

[0028] In another embodiment, a spring is also provided inside the first airbag 507. The spring can be used to push the support block 506 to quickly clamp the connecting steel bar that extends into the first sleeve 509, thereby preventing the connecting steel bar 501 installed in the precast beam from falling off during the lifting process and improving construction safety and reliability.

[0029] Both ends of the diagonal brace 411 are provided with third blind holes. The third blind hole is provided with a second elastic element and a connecting post 414. The outer diameter of the connecting post 414 is the same as the inner diameter of the third blind hole. Both the horizontal plate 404 and the vertical plate 408 are provided with first connecting blind holes. The second elastic element is used to push the connecting post 414 into the first connecting blind hole.

[0030] In this embodiment, in order to achieve a detachable connection between the diagonal brace 411 and the horizontal plate 404 and the vertical plate 408, a second blind hole is provided at both ends of the diagonal brace 411. A second elastic element and a connecting post 414 are provided in each of the second blind holes. The elastic force generated by the second elastic element pushes the connecting post 414 into the first connecting blind hole of the vertical plate 408 and the horizontal plate 404 respectively, thereby realizing a detachable connection between the vertical plate 408 and the horizontal plate 404 and the diagonal brace 411.

[0031] The second airbag 413 is connected to the third blind hole through the first channel. The top positioning tube of the horizontal plate 404 is connected to the first connecting blind hole through the second channel. The bottom plate of the precast beam 2 is also provided with a reserved hole that is connected to the first airbag 507. The inner diameter of the reserved hole is the same as the outer diameter of the positioning tube. The positioning tube is inserted into the reserved hole to connect the first airbag 507 and the second airbag 413.

[0032] In this embodiment, the connection between the first airbag 507 and the second airbag 413 is achieved using the second channel, allowing the air inside the second airbag 413 to be transferred into the first airbag 507 during compression, thus suspending the connecting steel bar 501 within the first sleeve 509. Simultaneously, when it is necessary to remove the diagonal brace 411 from the horizontal plate 404 and the vertical plate 408, the adjusting rod 410 is moved in the opposite direction, moving away from the second airbag 413. The second airbag 413 is stretched by the moving rod 410. During the stretching process, the second airbag 413 generates negative pressure, which draws back the air that was originally introduced into the first airbag 507. When the air inside the first airbag 507 is completely drawn back, the second airbag 413 continues to stretch under the action of the adjusting rod 410. The negative pressure generated will pull the connecting post 414 that was originally inserted into the first connecting blind hole back into the second blind hole, thereby achieving the purpose of quickly disassembling the diagonal brace 411 from the horizontal plate 404 and the vertical plate 408.

[0033] The adjusting rod 410 is also provided with a movable rod 409, which passes through the adjusting rod 410 axially. The end of the movable rod 409 is also provided with a pressing plate 412, and a third airbag 407 is also provided on the pressing plate 412. The third airbag 407 is located within the right angle formed by the horizontal plate 404 and the vertical plate 408. The first sleeve 509 is also provided with a fourth airbag 505, which is connected to the connecting steel bar 501 and is also connected to the third airbag 407.

[0034] In this embodiment, during the connection process between the connecting steel bar 501 and the second sleeve 601, the connecting steel bar 501 extends into the precast beam 2 and is obstructed by the precast beam 2. This prevents further adjustment of the position of the connecting steel bar 501 relative to the first sleeve 509 and the second sleeve 601 after the precast beam 2 and the precast column 1 are connected. Consequently, the length of the connecting steel bar 501 extending into the second sleeve 601 is relatively short, resulting in a weak connection strength between the connecting steel bar 501 and the second sleeve 601. Therefore, this technical solution also provides a fourth airbag 505 inside the first sleeve 509. When the movable rod 409 moves toward the third airbag 407, the extrusion plate 412 on the movable rod 409 extrudes the third airbag 407, forcing the air inside the third airbag 407 to transfer into the fourth airbag 505. This causes the fourth airbag 505 to expand axially along the first sleeve 509 within the first sleeve 509, thereby pushing the connecting steel bar 501 toward the second sleeve 601. This ensures that the connecting steel bar 501 has a longer length to extend into the second sleeve 601, so that after the grout is poured into the second sleeve 601, the connecting steel bar 501 can be stably connected to the second sleeve 601.

[0035] A second connecting blind hole is provided at the right angle formed by the horizontal plate 404 and the vertical plate 408. A connecting pipe 406 with an outer diameter that matches the inner diameter of the second connecting blind hole is provided on the third airbag 407. The connecting pipe 406 is inserted into the connecting pipe 406. A third channel is provided in the protrusion 402. One end of the third channel is connected to the second connecting blind hole and the second blind hole, and the other end is connected to the first blind hole. An air pipe is provided in the connecting steel bar 501. One end of the air pipe is connected to the fourth airbag 505, and the other end is connected to the second blind hole. When it is necessary to inject grout into the first sleeve 509, the movable rod 409 is moved in the opposite direction, so that the movable rod 409 pulls the third airbag 407 to stretch, and draws back the air that was originally squeezed into the fourth airbag 505. This causes the originally expanded fourth airbag 505 to gradually shrink back. In this way, more grout can be filled into the first sleeve 509 during grouting.

[0036] In this embodiment, after the connection between the precast column 1 and the precast beam 2 is completed, when it is necessary to remove the support member 4 from the precast column 1, the inclined brace plate 411 is first removed from the horizontal plate 404 and the vertical plate 408. Then, the movable rod 409 is used to pull the third airbag 407 to stretch it, so that a negative pressure is generated inside it. The negative pressure generated inside the third airbag 407 can no longer draw gas from the fourth airbag 505. The negative pressure generated will force the locking block 403, which was originally inserted in the locking groove, to retract into the first blind hole, thereby removing the constraint of the locking block 403 on the protrusion 402. This allows the protrusion 402 to be quickly removed from the connecting plate 401, thus achieving the purpose of quickly removing the support member 4.

[0037] A grouting pipe 503 is also provided on the first sleeve 509. One end of the grouting pipe 503 is connected to the first sleeve 509, and the other end extends to the top of the precast beam 2. After the connecting steel bar 501 is inserted into the second sleeve 601, a template is built on the precast beam 2 and the precast column 1. Then, the grouting pipe 503 is used to conveniently inject high-strength grout into the first sleeve 509. The grout that enters the first sleeve 509 gradually fills the first sleeve 509 and the second sleeve 601. After the grout solidifies, the connecting steel bar 501 stably connects the first sleeve 509 and the second sleeve 601, thereby completing the purpose of connecting the precast beam 2 and the precast column 1 node.

[0038] The specific construction procedures are as follows: S1: Install the precast column 1 into place; S2: Insert one end of the steel bar 501 to be connected into the first sleeve 509 embedded in the precast beam 2. Under the action of the spring in the first airbag 507, the first airbag 507 is forced to expand radially along the first sleeve 509, pushing the support block 506 to temporarily fix the connecting steel bar 501 placed in the first sleeve 509 in the first sleeve 509, so as to prevent the connecting steel bar 501 installed in the precast beam 2 from falling off during the lifting process of the precast beam 2. S3: Use lifting equipment to lift the precast beam 2 to be connected to the installation height, and place the precast beam 2 on the support 4. Use the support 4 to temporarily support the precast beam 2, and at the same time ensure that the connecting steel bar 501 installed on the precast beam 2 is aligned with the second sleeve 601 on the precast column 1. S4: Adjust the movable rod 409 set on the support 4 to compress the third airbag 407, squeeze the air inside the third airbag 407 into the fourth airbag 505 located in the first sleeve 509, and force the fourth airbag 505 to expand axially in the first sleeve 509, pushing the connecting steel bar 501 out from the first sleeve 509 and into the second sleeve 601 so that grout can be injected into the second sleeve 601 in the future. After the grout solidifies, the purpose of connecting the connecting steel bar of the precast beam 2 and the precast column 1 is achieved. The above structure can effectively prevent the connecting steel bar 501 set in the precast beam 2 from retracting during the connection process of the precast beam 2 and the precast column 1. S5: Adjust the movable rod 409 so that the movable rod 409 pulls the originally compressed third airbag 407 to stretch it and gradually restore its deformation. During the process of restoring the deformation, the third airbag 407 generates negative pressure inside, which draws back the air transferred to the fourth airbag 505, forcing the fourth airbag 505 to contract and preventing the fourth airbag 505 from temporarily occupying the space in the first sleeve 509. S6: Erect a formwork at the connection between precast beam 1 and precast column 1; S7: High-strength grout is injected into the first sleeve 509 through the grouting pipe 503 on the precast beam 2. The grout enters the first sleeve 509 through the grouting pipe 503 and fills the connecting steel bar 501 with the first sleeve 509 and the second sleeve 601. After the grout solidifies, a stable connection between the precast beam 2 and the precast column 1 is achieved.

[0039] S8: Continue the construction of composite reinforcement and composite concrete on precast beam 2 and precast column 1; S9: After the design strength is reached, the support 4 installed on the precast column 1 is disassembled to complete the construction of the connection node between the precast beam 2 and the precast column 1.

[0040] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A precast beam-column joint connection structure, characterized in that, The system includes a second connector (6) embedded in a precast column (1) and a first connector (5) embedded in a precast beam (2). The first connector (5) includes a first reinforcing bar (504), a first sleeve (509), and a connecting reinforcing bar (501) with an outer diameter smaller than the inner diameter of the first sleeve (509). The first sleeve (509) is connected to the first reinforcing bar (504). One end of the connecting reinforcing bar (501) is located inside the first sleeve (509), and the other end extends into the second connector (6). An internal support assembly is also provided inside the first sleeve (509). The system also includes a support member (4) that can be detachably connected to the second connector (6). The precast beam (2) is located on the top of the support member (4). The support member (4) is provided with a drive assembly for driving the internal support assembly to move radially along the first sleeve (509).

2. The precast beam-column joint connection structure according to claim 1, characterized in that, The second connector (6) includes a second reinforcing bar (602) and a second sleeve (601). The second reinforcing bar (602) and the second sleeve (601) are both embedded in the precast column (1). One end of the second sleeve (601) is a closed structure. The second reinforcing bar (602) is threaded to the closed end of the second sleeve (601). The connecting reinforcing bar (501) extends into the other end of the second sleeve (601), and the outer diameter of the connecting reinforcing bar (501) is smaller than the inner diameter of the second sleeve (601). The support (4) is connected to the end of the second sleeve (601) located outside the side wall of the precast column (1).

3. The precast beam-column joint connection structure according to claim 2, characterized in that, The support member (4) includes a horizontal plate (404) and a vertical plate (408). The horizontal plate (404) is used for vertical connection with the vertical plate (408). The horizontal plate (404) is located at the bottom of the precast beam (2), and the vertical plate (408) is located on the outside of the precast column (1). The top of the horizontal plate (404) is also provided with a connecting unit for detachable connection with the second sleeve (601).

4. The precast beam-column joint connection structure according to claim 3, characterized in that, The connecting unit includes a protrusion (402) and a connecting plate (401). The protrusion (402) is fixed to the top of the horizontal plate (404). A first blind hole is provided on the side wall of the protrusion (402). A first elastic element and a locking block (403) are provided in the first blind hole. The side wall of the connecting plate (401) is connected to the second sleeve (601). The bottom of the connecting plate (401) is provided with a second blind hole whose inner diameter is the same as the outer diameter of the protrusion (402). The inner wall of the second blind hole is provided with a locking groove. The protrusion (402) is located in the second blind hole, and the first elastic element is used to push the locking block (403) into the locking groove to fix the protrusion (402) on the connecting plate (401).

5. A precast beam-column joint connection structure according to claim 4, characterized in that, The inner support assembly includes a support block (506) and a first airbag (507). The inner wall of the first sleeve (509) is provided with a plurality of grooves, which are distributed circumferentially along the first sleeve (509). One end of the first airbag (507) is fixed in the groove, and the other end is connected to the support block (506). A diagonal brace (411) is provided after the horizontal plate (404) and the vertical plate (408). The drive assembly includes a second airbag (413) that communicates with the first airbag (507). An adjusting rod (410) is also provided on the diagonal brace (411). The adjusting rod (410) passes through the diagonal brace (411) and is connected to the movable end of the second airbag (413). An adjusting nut (415) is also provided on the adjusting rod (410). The adjusting nut (415) is connected to the adjusting rod (410) by a thread.

6. A precast beam-column joint connection structure according to claim 5, characterized in that, Both ends of the diagonal brace (411) are provided with a third blind hole. The third blind hole is provided with a second elastic element and a connecting column (414). The outer diameter of the connecting column (414) is the same as the inner diameter of the third blind hole. The horizontal plate (404) and the vertical plate (408) are both provided with a first connecting blind hole. The third elastic element is used to push the connecting column (414) into the first connecting blind hole.

7. A precast beam-column joint connection structure according to claim 6, characterized in that, The second airbag (413) is connected to the third blind hole through the first channel. The top positioning tube of the horizontal plate (404) is connected to the first connecting blind hole through the second channel. The bottom plate of the precast beam (2) is also provided with a reserved hole connected to the first airbag (507). The inner diameter of the reserved hole is consistent with the outer diameter of the positioning tube. The positioning tube is inserted into the reserved hole to connect the first airbag (507) and the second airbag (413).

8. A precast beam-column joint connection structure according to claim 5, characterized in that, The adjusting rod (410) is also provided with a movable rod (409), which passes through the adjusting rod (410) axially. The end of the movable rod (409) is also provided with a pressing plate (412), and a third airbag (407) is also provided on the pressing plate (412). The third airbag (407) is located within the right angle formed by the horizontal plate (404) and the vertical plate (408). The first sleeve (509) is also provided with a fourth airbag (505), which is connected to the connecting steel bar (501) and is also connected to the third airbag (407).

9. A precast beam-column joint connection structure according to claim 8, characterized in that, A second connecting blind hole is provided at the right angle formed by the horizontal plate (404) and the vertical plate (408). A connecting tube (406) with an outer diameter that is the same as the inner diameter of the second connecting blind hole is also provided on the third airbag (407). The connecting tube (406) is inserted into the connecting tube (406). The protrusion (402) is also provided with a third channel, one end of which is connected to the second connecting blind hole and the second blind hole respectively, and the other end is connected to the first blind hole; the connecting steel bar (501) is also provided with an air tube, one end of which is connected to the fourth airbag (505), and the other end is connected to the second blind hole.

Images