A Y-shaped column and a steel structure with an oversized steel beam and its construction method

Abstract

The present invention relates to the technical field of super-limit beam stiffened steel, and specifically to a Y-shaped column and a steel shape super-limit beam stiffened steel structure, including: a foundation seat, on the top of the foundation seat is provided a steel plate; a steel shape spacer block, on the surface of the steel shape spacer block is provided a reserved hole, in the reserved hole is inserted a beam steel bar, in the reserved hole is provided a first moving frame, on the surface of the first moving frame is provided a second moving frame, at the end of the first moving frame is provided a first screw rod, and at the end of the first screw rod is installed a second screwing rod; and a steel shape portal frame column, arranged on the top of the foundation seat; the present invention also discloses a construction method for a Y-shaped column and a steel shape super-limit beam stiffened steel structure, which comprises the following steps: installation and adjustment, and the beneficial effects are: for the installation of the steel shape portal frame column proposed by the present invention: first, preliminarily fix the steel shape portal frame column to the embedded anchor bolts, adjust and check the position and verticality of the steel shape portal frame column, and after it is correct, carry out the final fixation.

Description

Technical Field

[0001] The present invention relates to the technical field of super-limit beam stiffened steel, and particularly to a Y-shaped column and a steel section super-limit beam stiffened steel structure and a construction method thereof. Background Technique

[0002] Most current designs in construction projects are conventional beam-columns. However, with the development of society, people's demands for various spiritual and cultural demand buildings are increasing day by day, and various personalized buildings such as digital display centers and exhibition halls are gradually emerging.

[0003] In the prior art, for a Y-shaped column and a steel section super-limit beam, only one end of the steel section beam is fixed to the steel column, and the other end has no fixed point, and there is no support in the middle of the steel section beam.

[0004] However, when setting cushion blocks to support the steel beam according to the traditional construction technology, the strength requirements for the supporting cushion blocks are relatively high. At the same time, there are many bottom bars in the beam, and the positions of the cushion blocks will affect the arrangement and binding of the bottom bars of the beam, and individual bars are very likely to be disconnected. Summary of the Invention

[0005] The purpose of the present invention is to provide a Y-shaped column and a steel section super-limit beam stiffened steel structure and a construction method thereof to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A Y-shaped column and a steel section super-limit beam stiffened steel structure, the Y-shaped column and the steel section super-limit beam stiffened steel structure include:

[0007] A foundation seat, on the top of which a steel plate is provided.

[0008] A steel section cushion block, on the surface of which a reserved hole is opened, a beam bar is inserted into the reserved hole, a first moving frame is arranged in the reserved hole, a second moving frame is arranged on the surface of the first moving frame, a first screw rod is arranged at the end of the first moving frame, and a second screwing rod is installed at the end of the first screw rod; and

[0009] A steel section portal frame column, arranged on the top of the foundation seat.

[0010] Preferably, the steel plate is fixed on the top of the foundation seat through anchor bolts. A steel section portal frame column is arranged on the top of the steel plate. A steel section portal frame cross beam is arranged on the top of the steel section portal frame column. A Y-shaped column is arranged on the top of the foundation seat. The top of the Y-shaped column is connected to the bottom of the steel section portal frame cross beam. A beam bottom formwork is arranged on the top of the steel section portal frame cross beam. A steel section cushion block is installed on the top of the beam bottom formwork. There are multiple groups of steel section cushion blocks, and there are two groups of reserved holes, and the two groups of reserved holes are symmetrically opened on the surface of the steel section cushion block. A steel section beam is arranged on the top of the steel section cushion block. A beam side formwork is arranged on the top of the steel section portal frame cross beam.

[0011] Preferably, one side of the reserved hole is arc-shaped and the other side is horizontal. The first end of the reserved hole that is horizontal is inserted with a first moving frame. A jacking groove is formed on the surface of the first moving frame. The first moving frame can move in the reserved hole and cannot be detached from the reserved hole.

[0012] Preferably, a notch is formed on the surface of the first moving frame. A second moving frame is inserted into the notch. The second moving frame can move in the notch. One end of the second moving frame is located at the arc. A first screw rod is arranged at the end of the first moving frame and is screwed in the first moving frame. After the first screw rod rotates, the first moving frame will move.

[0013] Preferably, a second screwing rod is arranged at the end of the first screw rod. A second through groove is formed on the surface of the profiled steel cushion block. The second screwing rod is located in the second through groove and can rotate in the second through groove. Anti-slip lines are arranged on the surface of the second screwing rod. A first through groove is formed on the surface of the second screwing rod.

[0014] Preferably, a first screwing rod is inserted into the first through groove. The first screwing rod can rotate in the first through groove. Second screw rods are arranged at both ends of the first screwing rod. The second screw rods rotate along with the first screwing rod and are screwed in the second moving frame. When the second screw rods rotate, the second moving frame will move.

[0015] Preferably, a circular groove is formed inside the second screwing rod. The diameter of the circular groove is larger than the diameter of the second screw rod. The second screw rod can rotate in the circular groove. A telescopic rod is inserted into the surface of the first screwing rod. The telescopic rod can move back and forth in the first screwing rod.

[0016] Preferably, a spring is arranged inside the first screwing rod. One end of the spring is connected to the inside of the first screwing rod and the other end is connected to the end of the telescopic rod.

[0017] Preferably, an arc-shaped piece is installed on the surface of the profiled steel cushion block, close to the position of the reserved hole. After the beam steel bars move, they will jack against the surface of the arc-shaped piece. A rubber strip is arranged on the surface of the arc-shaped piece close to the beam steel bars. The rubber strip is flexible.

[0018] A construction method for a Y-shaped column and a profiled steel over-limit beam steel structure comprises the following steps:

[0019] Step 1: Installation. Initially fix the steel portal frame columns to the embedded anchor bolts, adjust and check the position and verticality of the steel portal frame columns. After ensuring they are correct, perform the final fixation. Install the cross beam of the steel portal frame: Determine the position and elevation of the cross beam of the steel portal frame according to the design drawings. After checking the flatness, weld and fix it to the cross beam of the steel portal frame. Install the formwork support under the beam. According to the positions of the beam reinforcement and the steel beam in the design drawings, position the steel pads to ensure that the beam reinforcement passes through the reserved holes and the center line of the steel pads coincides with the center line of the steel beam. Install the steel beam: Install the steel beam on the steel pads according to the positions in the design drawings, insert the beam reinforcement into the reserved holes, and turn the second turning rod to make the first moving frame move. After the first moving frame moves, it abuts against the surface of the beam reinforcement.

[0020] Step 2: Adjustment. If the diameter of the beam reinforcement is small, turn the first turning rod through the telescopic rod to make the second moving frame move. The second moving frame abuts against the surface of the beam reinforcement with a small diameter to stabilize the beam reinforcement in the reserved hole. During the rotation of the first turning rod, the telescopic rod can be retracted into the first turning rod to facilitate the rotation of the first turning rod. After the beam reinforcement moves, it is abutted by the rubber strip to stabilize the beam reinforcement.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The installation of the steel portal frame columns proposed by the present invention: First, initially fix the steel portal frame columns to the embedded anchor bolts, adjust and check the position and verticality of the steel portal frame columns. After ensuring they are correct, perform the final fixation. Install the cross beam of the steel portal frame: Determine the position and elevation of the cross beam of the steel portal frame according to the design drawings. After checking the flatness, weld and fix it to the cross beam of the steel portal frame. Install the formwork support under the beam. According to the positions of the beam reinforcement and the steel beam in the design drawings, position the steel pads to ensure that the beam reinforcement passes through the reserved holes and the center line of the steel pads coincides with the center line of the steel beam. Install the steel beam: Install the steel beam on the steel pads according to the positions in the design drawings, insert the beam reinforcement into the reserved holes, and turn the second turning rod to make the first moving frame move. After the first moving frame moves, it abuts against the surface of the beam reinforcement to fix the beam reinforcement in the reserved hole. If the diameter of the beam reinforcement is small, turn the first turning rod through the telescopic rod to make the second moving frame move. The second moving frame abuts against the surface of the beam reinforcement with a small diameter to stabilize the beam reinforcement in the reserved hole. During the rotation of the first turning rod, the telescopic rod can be retracted into the first turning rod to facilitate the rotation of the first turning rod. After the beam reinforcement moves, it is abutted by the rubber strip to stabilize the beam reinforcement. Then, bind the beam reinforcement, install and reinforce the side formwork of the beam, pour concrete, and cure. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the present invention;

[0024] Figure 2Schematic three-dimensional structure diagram of the steel pad block of the present invention;

[0025] Figure 3 Schematic three-dimensional structure diagram of the first moving frame of the present invention;

[0026] Figure 4 Schematic sectional three-dimensional structure diagram of the first moving frame of the present invention;

[0027] Figure 5 is Figure 2 Schematic enlarged structure diagram at position A in

[0028] Figure 6 is Figure 4 Schematic enlarged structure diagram at position B in

[0029] In the figure: anchor bolt 1, steel portal frame column 2, steel portal frame cross beam 3, bottom formwork support 4, steel pad block 5, side formwork 6, foundation seat 7, Y-shaped column 8, steel beam 9, steel plate 10, reserved hole 11, beam steel bar 12, supporting groove 13, first moving frame 14, notch 15, second moving frame 16, first screw 17, first through groove 18, first screwing rod 19, second screwing rod 20, arc-shaped piece 21, rubber strip 22, second through groove 23, second screw 24, round groove 25, telescopic rod 26. Detailed implementation manners

[0030] In order to clearly and completely describe the purpose, technical solution of the present invention and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inside", "outside", "top", "bottom", "side", "vertical", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] For the sake of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are set forth to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring these embodiments. Additionally, all embodiments may be used in combination with each other.

[0034] Please refer to Figures 1 to 6, the present invention provides a technical solution: a Y-shaped column and a steel beam with excessive section steel rigid steel structure, the Y-shaped column and the steel beam with excessive section steel rigid steel structure comprising: a foundation base 7, a steel plate 10 is provided on the top of the foundation base 7, the steel plate 10 is fixed to the top of the foundation base 7 through anchor bolts 1, a steel portal frame column 2 is provided on the top of the steel plate 10, a steel portal frame cross beam 3 is provided on the top of the steel portal frame column 2, a Y-shaped column 8 is provided on the top of the foundation base 7, the top of the Y-shaped column 8 is connected to the bottom of the steel portal frame cross beam 3, a beam bottom formwork 4 is provided on the top of the steel portal frame cross beam 3, a steel section spacer 5 is installed on the top of the beam bottom formwork 4, there are multiple groups of steel section spacers 5, there are two groups of reserved holes 11, the two groups of reserved holes 11 are symmetrically opened on the surface of the steel section spacer 5, a steel beam 9 is provided on the top of the steel section spacer 5, a beam side formwork 6 is provided on the top of the steel portal frame cross beam 3, one side of the reserved hole 11 is arc-shaped and the other side is horizontal, and a first moving frame 14 is inserted into the horizontal first end of the reserved hole 11, a holding groove 13 is opened on the surface of the first moving frame 14, the first moving frame 14 can move in the reserved hole 11 and the first moving frame 14 cannot be detached from the reserved hole 11, a notch 15 is opened on the surface of the first moving frame 14, a second moving frame 16 is inserted into the notch 15, the second moving frame 16 can move in the notch 15, one end of the second moving frame 16 is located at the arc-shaped part, and a first screw rod 17 is provided at the end of the first moving frame 14, the first screw rod 17 is screwed in the first moving frame 14, after the first screw rod 17 rotates, the first moving frame 14 will move, a second screwing rod 20 is provided at the end of the first screw rod 17, a second through groove 23 is opened on the surface of the steel section spacer 5, the second screwing rod 20 is located in the second through groove 23, the second screwing rod 20 can rotate in the second through groove 23, and anti-slip lines are provided on the surface of the second screwing rod 20, a first through groove 18 is opened on the surface of the second screwing rod 20, a first screwing rod 19 is inserted into the first through groove 18, the first screwing rod 19 can rotate in the first through groove 18, second screw rods 24 are provided at both ends of the first screwing rod 19, the second screw rods 24 rotate along with the first screwing rod 19, the second screw rods 24 are screwed in the second moving frame 16, when the second screw rods 24 rotate, the second moving frame 16 will move;

[0035] The steel section spacer block 5 has a reserved hole 11 on its surface. A beam steel bar 12 is inserted into the reserved hole 11. A first moving frame 14 is arranged in the reserved hole 11. A second moving frame 16 is arranged on the surface of the first moving frame 14. A first screw rod 17 is arranged at the end of the first moving frame 14. A second screwing rod 20 is installed at the end of the first screw rod 17. A circular groove 25 is opened inside the second screwing rod 20. The diameter of the circular groove 25 is larger than the diameter of the second screw rod 24. The second screw rod 24 can rotate in the circular groove 25. A telescopic rod 26 is inserted into the surface of the first screwing rod 19. The telescopic rod 26 can move back and forth in the first screwing rod 19. A spring is arranged inside the first screwing rod 19. One end of the spring is connected to the inside of the first screwing rod 19, and the other end is connected to the end of the telescopic rod 26. An arc-shaped piece 21 is installed on the surface of the steel section spacer block 5. The arc-shaped piece 21 is close to the reserved hole 11. After the beam steel bar 12 moves, it will abut against the surface of the arc-shaped piece 21. A rubber strip 22 is arranged on the surface of the arc-shaped piece 21 close to the beam steel bar 12. The rubber strip 22 has flexibility; the steel section portal frame column 2 is arranged on the top of the foundation seat 7.

[0036] A construction method for a Y-shaped column and a steel section super-limit beam stiffened steel structure includes the following steps:

[0037] Step 1: Installation. Initially fix the steel section portal frame column 2 and the embedded anchor bolts 1, adjust and check the position and verticality of the steel section portal frame column 2. After it is correct, perform the final fixation. Install the steel section portal frame cross beam 3: Determine the position and elevation of the steel section portal frame cross beam 3 according to the design drawings. After checking the flatness, weld and fix it with the steel section portal frame cross beam 3. Install the beam bottom formwork support 4. According to the positions of the beam steel bar 12 and the steel section beam 9 in the design drawings, position the steel section spacer block 5 to ensure that the beam steel bar 12 passes through the reserved hole 11 and the center line of the steel section spacer block 5 coincides with the center line of the steel section beam 9. Install the steel section beam 9: Install the steel section beam 9 on the steel section spacer block 5 according to the position in the design drawings. Insert the beam steel bar 12 into the reserved hole 11. Rotate the second screwing rod 20 so that the first moving frame 14 moves. After the first moving frame 14 moves, it abuts against the surface of the beam steel bar 12.

[0038] Step 2: Adjustment. If the diameter of the beam steel bar 12 is small, rotate the first screwing rod 19 through the telescopic rod 26 so that the second moving frame 16 moves. Through the second moving frame 16, abut against the surface of the beam steel bar 12 with a small diameter to stabilize the beam steel bar 12 in the reserved hole 11. During the rotation of the first screwing rod 19, the telescopic rod 26 can be retracted into the first screwing rod 19, which is convenient for rotating the first screwing rod 19. After the beam steel bar 12 moves, it is abutted by the rubber strip 22 to stabilize the beam steel bar 12.

[0039] Preliminarily fix the column 2 of the profiled steel gantry frame to the embedded anchor bolts 1, adjust and check the position and verticality of the column 2 of the profiled steel gantry frame. After being correct, conduct final fixation and install the cross beam 3 of the profiled steel gantry frame: Determine the position and elevation of the cross beam 3 of the profiled steel gantry frame according to the design drawings. After checking the flatness, weld and fix it to the cross beam 3 of the profiled steel gantry frame. Install the bottom formwork support 4 of the beam. According to the positions of the beam steel bars 12 and the profiled steel beam 9 in the design drawings, position the profiled steel cushion blocks 5 to ensure that the beam steel bars 12 pass through the reserved holes 11 and the center line of the profiled steel cushion blocks 5 coincides with the center line of the profiled steel beam 9. Install the profiled steel beam 9: Install the profiled steel beam 9 on the profiled steel cushion blocks 5 according to the position in the design drawings. Insert the beam steel bars 12 into the reserved holes 11, and turn the second turning rod 20 to make the first moving frame 14 move. After the first moving frame 14 moves, it abuts against the surface of the beam steel bars 12 to fix the beam steel bars 12 in the reserved holes 11. If the diameter of the beam steel bars 12 is small, turn the first turning rod 19 through the telescopic rod 26 to make the second moving frame 16 move. The second moving frame 16 abuts against the surface of the beam steel bars 12 with a small diameter to stabilize the beam steel bars 12 in the reserved holes 11. During the rotation of the first turning rod 19, the telescopic rod 26 can be retracted into the first turning rod 19 to facilitate the rotation of the first turning rod 19. After the beam steel bars 12 move, they are abutted by the rubber strip 22 to stabilize the beam steel bars 12. Bind the beam steel bars 12, install and reinforce the side formwork of the beam, pour concrete, and cure it.

[0040] Although the above descriptive specific embodiments of the present application are described to enable those skilled in the art of the present technology to understand the present application, the present application is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all application creations using the concept of the present application are within the scope of protection.

Claims

1. A Y-shaped column and a super-limit beam of profiled steel stiffened steel structure, characterized in that: The Y-shaped column and the profiled steel ultra-long beam rigid steel structure include: A foundation seat (7), on the top of which a steel plate (10) is provided; A profiled steel cushion block (5), on the surface of which a reserved hole (11) is formed, in which a beam steel bar (12) is inserted. A first moving frame (14) is arranged in the reserved hole (11), a second moving frame (16) is arranged on the surface of the first moving frame (14), a first screw rod (17) is arranged at the end of the first moving frame (14), and a second screwing rod (20) is installed at the end of the first screw rod (17); and A profiled steel portal frame column (2), arranged on the top of the foundation seat (7). The steel plate (10) is fixed on the top of the foundation seat (7) through anchor bolts (1). A profiled steel portal frame column (2) is arranged on the top of the steel plate (10), a profiled steel portal frame cross beam (3) is arranged on the top of the profiled steel portal frame column (2), a Y-shaped column (8) is arranged on the top of the foundation seat (7), the top of the Y-shaped column (8) is connected to the bottom of the profiled steel portal frame cross beam (3), a beam bottom formwork support (4) is arranged on the top of the profiled steel portal frame cross beam (3), a profiled steel cushion block (5) is installed on the top of the beam bottom formwork support (4), there are multiple groups of profiled steel cushion blocks (5), and there are two groups of reserved holes (11), and the two groups of reserved holes (11) are symmetrically formed on the surface of the profiled steel cushion block (5). A profiled steel beam (9) is arranged on the top of the profiled steel cushion block (5), a beam side formwork (6) is arranged on the top of the profiled steel portal frame cross beam (3). One side of the reserved hole (11) is arc-shaped and the other side is horizontal. The horizontal first end of the reserved hole (11) is inserted with the first moving frame (14). A holding groove (13) is formed on the surface of the first moving frame (14). The first moving frame (14) can move in the reserved hole (11) and cannot break away from the reserved hole (11). A notch (15) is formed on the surface of the first moving frame (14), and the second moving frame (16) is inserted into the notch (15). The second moving frame (16) can move in the notch (15). One end of the second moving frame (16) is located at the arc-shaped part. A first screw rod (17) is arranged at the end of the first moving frame (14), and the first screw rod (17) is screwed in the first moving frame (14). After the first screw rod (17) rotates, the first moving frame (14) will move. A second screwing rod (20) is arranged at the end of the first screw rod (17). A second through groove (23) is formed on the surface of the profiled steel cushion block (5). The second screwing rod (20) is located in the second through groove (23). The second screwing rod (20) can rotate in the second through groove (23), and anti-slip lines are arranged on the surface of the second screwing rod (20). A first through groove (18) is formed on the surface of the second screwing rod (20).

2. The Y-shaped column and profiled steel ultra-long beam rigid steel structure according to claim 1, wherein: A first screwing rod (19) is inserted into the first through groove (18). The first screwing rod (19) can rotate in the first through groove (18). Second screw rods (24) are arranged at both ends of the first screwing rod (19). The second screw rods (24) rotate along with the first screwing rod (19). The second screw rods (24) are screwed in the second moving frame (16). When the second screw rods (24) rotate, the second moving frame (16) will move.

3. A Y-shaped column and profiled steel ultra-long beam stiffened steel structure according to claim 2, characterized in that: A circular groove (25) is formed inside the second screwing rod (20). The diameter of the circular groove (25) is larger than that of the second screw rod (24). The second screw rod (24) can rotate in the circular groove (25). A telescopic rod (26) is inserted on the surface of the first screwing rod (19). The telescopic rod (26) can move back and forth in the first screwing rod (19).

4. A Y-shaped column and profiled steel ultra-long beam rigid steel structure according to claim 3, characterized in that: A spring is arranged inside the first screwing rod (19). One end of the spring is connected to the inside of the first screwing rod (19), and the other end is connected to the end of the telescopic rod (26).

5. The Y-shaped column and profiled steel ultra-long beam rigid steel structure according to claim 4, characterized in that: An arc-shaped piece (21) is installed on the surface of the profiled steel cushion block (5). The arc-shaped piece (21) is close to the reserved hole (11). After the beam steel bars (12) move, they will abut against the surface of the arc-shaped piece (21). A rubber strip (22) is arranged on the surface of the arc-shaped piece (21) close to the beam steel bars (12). The rubber strip (22) is flexible.

6. A construction method for a Y-shaped column and a super-limit steel beam of a profiled steel structure as described in claim 5, characterized in that: Comprising the following steps: Step 1: Installation. Initially fix the profiled steel portal frame column (2) and the embedded anchor bolts (1). Adjust and check the position and verticality of the profiled steel portal frame column (2). After it is correct, perform the final fixation. Install the profiled steel portal frame cross beam (3): Determine the position and elevation of the profiled steel portal frame cross beam (3) according to the design drawing. After checking the flatness, perform welding fixation with the profiled steel portal frame cross beam (3). Install the beam bottom formwork support (4). According to the positions of the beam steel bars (12) and the profiled steel beam (9) in the design drawing, position the profiled steel cushion block (5) to ensure that the beam steel bars (12) pass through the reserved holes (11), and the center line of the profiled steel cushion block (5) coincides with the center line of the profiled steel beam (9). Install the profiled steel beam (9): Install the profiled steel beam (9) on the profiled steel cushion block (5) according to the position in the design drawing. Insert the beam steel bars (12) into the reserved holes (11). Screw the second screwing rod (20) to make the first moving frame (14) move. After the first moving frame (14) moves, it abuts against the surface of the beam steel bars (12). Step 2: Adjustment. If the diameter of the beam steel bars (12) is small, rotate the first screwing rod (19) through the telescopic rod (26) to make the second moving frame (16) move. The second moving frame (16) abuts against the surface of the beam steel bars (12) with a small diameter to stabilize the beam steel bars (12) in the reserved holes (11). During the rotation of the first screwing rod (19), the telescopic rod (26) can be retracted into the first screwing rod (19) to facilitate the rotation of the first screwing rod (19). After the beam steel bars (12) move, they are abutted by the rubber strip (22) to stabilize the beam steel bars (12).

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