A large-span prestressed structure beam reinforcing structure

Abstract

The utility model relates to prestressed structure beam technical field especially relates to a large -span prestressed structure beam reinforcing structure, including bellows, the inside of bellows is wrapped with stress reinforcement, the outside surface of bellows has poured concrete, the overhanging end of concrete is fixedly arranged with the beam hanger, the bottom fixedly connected with the conventional beam of beam hanger. The application can make stress reinforcement hoist conventional beam through the setting of beam hanger, thereby realizes the overhanging setting of prestressed reinforcement beam and conventional beam, guarantees the combination of conventional beam and prestressed reinforcement beam, satisfies the use effect of lower space, and can realize the stability of large -span overhanging structure of prestressed reinforcement beam and conventional beam through beam hanger.

Description

Technical Field

[0001] This utility model relates to the field of prestressed structural beam technology, and in particular to a reinforcement structure for large-span prestressed structural beams. Background Technology

[0002] Prestressed concrete beams are concrete beam structures in which tensile force is applied to the steel bars (or steel strands, etc.) within the beam before it bears external loads, creating prestress and thus improving its load-bearing capacity, crack resistance, and stiffness. Compared to ordinary reinforced concrete beams, prestressed concrete beams can utilize material properties more efficiently, reduce beam cross-sectional dimensions, and increase span. However, the construction process is relatively complex and requires higher technical expertise. The prestressed steel bars (or prestressed tendons) used in large-span prestressed structures are the core material for achieving structural span capacity and controlling deformation and cracking; their performance, selection, and arrangement are crucial considerations. This directly affects the safety and economy of the structure; however, in the construction of existing large-span cantilever beam structures, if prestressed steel beams are used for cantilever extension, it will result in an excessively large footprint, affecting the activity space; if conventional beams are used for cantilever, the strength of the conventional beams will be insufficient, and creep will occur under long-term load, causing the beam deflection to gradually increase. At the same time, in order to pursue the span capacity, large-span prestressed beams are usually designed as flexible structures (lighter self-weight and relatively lower stiffness), which are prone to large amplitude and displacement under seismic action, which may cause damage to the connection nodes between the beam and other components (such as columns and supports). Utility Model Content

[0003] The purpose of this utility model is to provide a reinforcement structure for large-span prestressed beams, in order to solve the problem mentioned in the background art that the concrete of large-span beams in the existing technology will creep under long-term load, resulting in a gradual increase in beam deflection. At the same time, in order to pursue the span capacity, large-span prestressed beams are usually designed as flexible structures (lighter self-weight and relatively lower stiffness), which are prone to large amplitude and displacement under seismic action, which may cause damage to the connection nodes between the beam and other components (such as columns and supports).

[0004] To achieve the above objectives, this utility model provides the following technical solution: a reinforcement structure for a large-span prestressed structural beam, comprising a corrugated pipe, wherein the corrugated pipe is internally wrapped with reinforcing steel bars, and concrete is poured onto the outer surface of the corrugated pipe. A suspension beam is fixedly installed at the cantilever end of the concrete, and a conventional beam is fixedly connected to the bottom end of the suspension beam. The structure also includes:

[0005] The positioning ribs are attached to the outer surface of the corrugated pipe and the surface of the positioning ribs and fixed by iron wires. The two sides of the positioning ribs are fixed by iron wires and second stirrups.

[0006] A positioning ring is fixedly connected to the outer surface of the bellows, and a connecting groove is formed on the outer surface of the positioning ring.

[0007] Preferably, the outer surface of the second stirrup is connected to the first stirrup by wire, and the first stirrup wraps around the outside of the second stirrup.

[0008] Preferably, four sets of connecting grooves are provided on the positioning ring, the connecting grooves are slidably connected to the connecting shell, and the connecting shell is slidably connected to the connecting ribs.

[0009] Preferably, the connecting rib has an insert inside, and the outer surface of the insert has a lubrication ring.

[0010] Preferably, one end of the insert is fixedly connected to a connecting post, and one end of the connecting post is fixedly connected to a rotating screw.

[0011] Preferably, the rotating screw and the threaded groove inside the connecting housing are in contact with each other, the bottom end of the rotating screw and the extrusion plate are in contact with each other, one end of the extrusion plate is fixedly connected to the first spring, one end of the first spring is fixedly connected to the base, one side surface of the base is fixedly connected to the connecting housing, and one end of the connecting rib is fixedly connected to a retaining ring.

[0012] Preferably, the positioning ring has an extrusion groove inside, and a second spring is provided inside the extrusion groove. An extrusion plate is fixedly connected to one side surface of the second spring.

[0013] Preferably, three sets of the second spring are provided below the extrusion plate, and four sets of the extrusion plate are provided inside the extrusion groove.

[0014] Preferably, it also includes a fixing nut, an upper plate is fixedly connected to the outer surface of the concrete, a side panel is fixedly connected to the outer surface of the upper plate, and a threaded rod is provided on the outer surface of the side panel;

[0015] Angle steel, one end of the threaded rod is threadedly connected to a connecting shell, the outer surface of the connecting shell is fixedly connected to a rotating shaft, the rotating shaft is set in a rotating groove, and the rotating groove is opened on both ends of the angle steel.

[0016] Preferably, a first threaded plate is fixedly connected to the outer surface of the connecting shell, and a second threaded plate is fixedly connected to the outer surface of the corner steel, wherein the first threaded plate and the second threaded plate are combined to form a threaded groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application ensures the casting of prestressed steel bars by setting up corrugated pipes, stress steel bars, positioning bars, first stirrups and second stirrups. With the support of binding technology, the position of internal stress steel bars is fixed, ensuring the integrity of the industrial effect. At the same time, the addition of support devices makes the effect after casting more ideal.

[0019] 2. This application, through the setting of a fixed ring, a positioning ring, a rotating screw, a first spring, and a second spring, achieves a secondary buffering effect. The setting of the first and second springs increases the stress and stress relief of the beam, thereby increasing the service life of the beam and mitigating the impact of load changes on the beam. During an earthquake, the double buffering effect can maximize the stability of the beam. After installing all the threaded rods and corner steel, the stress reinforcement can lift the lifting beam, which in turn lifts the conventional beam, thus lifting the entire conventional beam. The design of the side panels and other devices strengthens the stability of the concrete and the lifting beam, allowing the stress reinforcement to better lift the conventional beam. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a large-span prestressed beam reinforcement structure proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the internal bundled steel bars of a large-span prestressed structural beam reinforcement structure proposed in this utility model.

[0022] Figure 3 This is an overall view of a prestressed steel beam structure for strengthening a large-span prestressed structural beam, as proposed in this utility model.

[0023] Figure 4 This is a schematic diagram of the interaction between the stress reinforcement and concrete in a large-span prestressed beam reinforcement structure proposed in this utility model.

[0024] Figure 5 This is a schematic diagram of the interaction between the first and second stirrups in a large-span prestressed beam reinforcement structure proposed in this utility model.

[0025] Figure 6 This is a schematic diagram of the interaction between the extrusion plate and the first spring in a large-span prestressed structural beam reinforcement structure proposed in this utility model.

[0026] Figure 7 for Figure 4 Enlarged structural diagram at point A in the middle;

[0027] Figure 8 This is a schematic diagram of the cooperation between the fixing ring and the connecting bar in a large-span prestressed beam reinforcement structure proposed in this utility model.

[0028] Figure 9 This is a schematic diagram of the positioning ring and connecting groove cooperating with each other in a reinforcement structure for a large-span prestressed beam proposed in this utility model.

[0029] Figure 10 This is a schematic diagram of the cooperation between the upper plate and the side plate of a large-span prestressed beam reinforcement structure proposed in this utility model.

[0030] Figure 11 This is a schematic diagram of the interlocking structure of the threaded rod and the fixing nut in a reinforcement structure for a large-span prestressed structural beam proposed in this utility model.

[0031] Figure 12 for Figure 9 Enlarged structural diagram at point B.

[0032] In the diagram: 1. Corrugated pipe; 2. Stressed steel reinforcement; 3. Concrete; 4. First stirrup; 5. Second stirrup; 6. Positioning bar; 7. Fixing ring; 8. Connecting bar; 9. Connecting shell; 10. Inset; 11. Lubricating ring; 12. Connecting column; 13. Rotating screw; 14. Extrusion plate; 15. First spring; 16. Base; 17. Positioning ring; 18. Connecting groove; 19. Extrusion groove; 20. Extrusion plate; 21. Second spring; 22. Upper plate; 23. Side panel; 24. Threaded rod; 25. Fixing nut; 26. Connecting shell; 27. Rotating shaft; 28. First threaded plate; 29. ​​Second threaded plate; 30. Angle steel; 31. Rotating groove; 32. Lifting beam; 33. Conventional beam. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figure 1-2 This utility model provides a technical solution: a large-span prestressed structural beam reinforcement structure, including a corrugated pipe 1, with prestressed steel bars 2 wrapped inside the corrugated pipe 1, and concrete 3 poured on the outer surface of the corrugated pipe 1. The corrugated pipe 1, prestressed steel bars 2, and concrete 3 together form a prestressed steel beam. A suspension beam 32 is fixedly installed at the cantilever end of the concrete 3, and a conventional beam 33 is fixedly connected to the bottom end of the suspension beam 32. It is worth noting that the suspension beam 32 is connected to both the prestressed steel beam and the conventional beam 33 via... Figure 2The steel bar binding connection shown ensures a stable connection between the hanging beam 32 and the prestressed steel beam and the conventional beam 33, thereby realizing a combined cantilever structure of the prestressed steel beam and the conventional beam 33, thus ensuring both the use of conventional small volume and the stability of conventional cantilever structure.

[0035] See appendix Figure 3-9 In another embodiment, a positioning rib 6 is also included. The outer surface of the corrugated pipe 1 and the surface of the positioning rib 6 are attached to each other and fixed by wire. The two sides of the positioning rib 6 are fixed by wire and the second stirrup 5. By setting the positioning rib 6, the position of the corrugated pipe 1 can be fixed, so that the stress steel bar 2 can be stretched better. The fixing of the second stirrup 5 can ensure the stability of the overall device. A positioning ring 17 is fixedly connected to the outer surface of the corrugated pipe 1. A connecting groove 18 is opened on the outer surface of the positioning ring 17. The position of the positioning ring 17 can restrict the position of the connecting shell 9.

[0036] The connecting groove 18 has four sets on the positioning ring 17. The connecting groove 18 is slidably connected to the connecting shell 9. The connecting shell 9 is slidably connected to the connecting rib 8. The four sets of connecting grooves 18 and the connecting shell 9 can better cooperate. The connecting shell 9 is also provided with four sets, so that the connecting rib shell 8 can move inside the connecting shell 9.

[0037] The connecting rib 8 has an insert 10 inside, and the outer surface of the insert 10 has a lubrication ring 11. The insert 10 can rotate in the connecting rib 8. The design of the lubrication ring 11 can better enable the insert 10 to rotate.

[0038] One end of the insert 10 is fixedly connected to a connecting post 12, and one end of the connecting post 12 is fixedly connected to a rotating screw 13. When the device is subjected to force, the rotating screw 13 rotates in the connecting housing 9, and the rotating screw 13 will drive the connecting post 12 to rotate.

[0039] The rotating screw 13 and the threaded groove inside the connecting housing 9 are in contact with each other. The bottom end of the rotating screw 13 is in contact with the extrusion plate 14. One end of the extrusion plate 14 is fixedly connected to the first spring 15. One end of the first spring 15 is fixedly connected to the base 16. One side surface of the base 16 is fixedly connected to the connecting housing 9. One end of the connecting rib 8 is fixedly connected to the fixing ring 7. When the device is subjected to force, the rotating screw 13 will rotate and press down in the threaded groove, applying pressure to the extrusion plate 14. Then the extrusion plate 14 will extrude the first spring 15. Since the base 16 and the connecting housing 9 are fixedly connected, the first spring 15 will also be extruded.

[0040] The positioning ring 17 has an extrusion groove 19 inside, and a second spring 21 is installed inside the extrusion groove 19. An extrusion plate 20 is fixedly connected to one side surface of the second spring 21. When the connecting rib 8 is under force, it will apply extrusion force to the extrusion plate 20, causing the second spring 21 to contract under force.

[0041] There are three sets of second springs 21 below the extrusion plate 20, and four sets of extrusion plates 20 inside the extrusion groove 19. The three sets of second springs 21 can better bear the force, making the force on the extrusion plate 20 more uniform.

[0042] The outer surface of the connecting shell 26 is fixedly connected to a first threaded piece 28, and the outer surface of the corner steel 30 is fixedly connected to a second threaded piece 29. The first threaded piece 28 and the second threaded piece 29 are combined to form a threaded groove. After the connecting shell 26 is threadedly connected to the threaded rod 24, the first threaded piece 28 and the second threaded piece 29 are in an overlapping state, forming a threaded groove, which is then tightened by screws.

[0043] First, during installation, the stress reinforcement 2 is installed inside the corrugated pipe 1. Then, the positioning ring 17 is fixed to the outer surface of the corrugated pipe 1. After the positioning ring 17 is fixed, the second stirrup 5 and the fixing ring 7 are fixedly connected. After the four sets of fixing rings 7 are fixed, the first stirrup 4 and the second stirrup 5 are fixed by binding. Then, the positioning reinforcement 6 is inserted into it to fix the position of the corrugated pipe 1 by the positioning reinforcement 6, which is also fixed by binding.

[0044] After the overall device is fixed, the internal stress reinforcement 2 is pulled, and then concrete 3 is poured to complete the casting of the prestressed beam. Existing large-span beams will experience creep under long-term loads, leading to a gradual increase in beam deflection. Furthermore, large-span prestressed beams, in pursuit of span capacity, are typically designed as flexible structures (lighter in weight and relatively lower in stiffness), making them prone to large amplitude and displacement under seismic loads, potentially causing damage to the connection points between the beam and other components (such as columns and supports). In this device, however, when pressure is applied to the upper part of the beam, the pressure will first be transmitted... The force is transmitted to the first stirrup 4, and then to the second stirrup 5. After the second stirrup 5 is stressed, the fixing ring 7 will apply pressure to the connecting rib 8. The connecting rib 8 will push the rotating screw 13 downward to rotate and move down in the threaded groove of the connecting housing 9. When the rotating screw 13 rotates, it will drive the connecting post 12 and the inner insert 10 to rotate. Through the setting of the lubricating ring 11, the inner insert 10 can rotate better without affecting the rotation of the rotating screw 13. The connecting post 12 and the inner insert 10 cooperate with the lubricating ring 11 to reduce rotational friction and limit the rotation of the rotating screw 13.

[0045] When the screw 13 rotates downwards, the extrusion plate 14 is pressed against the first spring 15. The first spring 15 and the base 16 are fixedly connected, and the base 16 and the connecting shell 9 are fixedly connected. The first spring 15 will contract. When the connecting shell 9 is under force, the connecting shell 9 slides in the connecting groove 18, applying pressure to the extrusion plate 20, causing the extrusion plate 20 to be pressed down in the extrusion groove 19. The second spring 21 will be compressed under force, achieving a secondary buffering effect. When the pressure of the upper layer disappears, the first spring 15 and the second spring 21 will rebound to release the force, increasing the service life of the beam and mitigating the impact of load changes on the beam. During an earthquake, the double buffering effect can maximize the stability of the beam.

[0046] See appendix Figure 10-12 In another embodiment, an upper plate 22 is fixedly connected to the outer surface of the concrete 3, and a side panel 23 is fixedly connected to the outer surface of the upper plate 22. A threaded rod 24 is provided on the outer surface of the side panel 23. The position of the side panel 23 is fixed by the threaded rods 24 on both sides. The concrete 3 and the hanging beam 32 are fixed by the side panel 24 to strengthen the overall device. One end of the threaded rod 24 is threadedly connected to a connecting shell 26. A rotating shaft 27 is fixedly connected to the outer surface of the connecting shell 26. The rotating shaft 27 is set in a rotating groove 31. The rotating groove 31 is opened on both ends of the corner steel 30. The rotating groove 31 is opened at both ends of the corner steel 30. The rotating shaft 27 is rotatably connected inside the rotating groove 31.

[0047] The outer surface of the second stirrup 5 is connected to the first stirrup 4 by wire. The first stirrup 4 wraps around the outside of the second stirrup 5. The design of the first stirrup 4 and the second stirrup 5 can ensure the stability of the beam.

[0048] Concrete 3 is fixed to the upper plate 22 by threads. Then, threaded rods 24 are arranged from bottom to top and installed in the side panel 23. The side panel 23 is connected to the concrete 3 and the hanging beam 32 by pouring. The threaded rods 24 inserted in the side panel 23 and the connecting shell 26 are threaded together. During the connection, the rotating shaft 27 fixedly connected to the connecting shell 26 will rotate in the rotating groove 31 in the corner steel 30. After the threaded connection is completed, the first threaded plate 28 and the second threaded plate 29 are in an overlapping state to form a thread. The groove is then tightened with screws to fix the position of the connecting shell 26 and the corner steel 30. Finally, the fixing thread 25 is screwed onto the threaded rod 24 to fix the position of the nut rod 24. All the threaded rods 24 and corner steel 30 are installed in sequence. This allows the stress steel bar 2 to lift the lifting beam 32, which in turn lifts the conventional beam 33, thus lifting the entire conventional beam 33. The design of the side panel 23 and other devices strengthens the stability of the concrete 3 and the lifting beam 32, allowing the stress steel bar 2 to better lift the conventional beam 33.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reinforcement structure for large-span prestressed beams, characterized in that, The system includes a corrugated pipe (1), the interior of which is wrapped with reinforcing steel bars (2), and the outer surface of the corrugated pipe (1) is covered with concrete (3). A suspension beam (32) is fixedly installed at the cantilever end of the concrete (3), and a conventional beam (33) is fixedly connected to the bottom end of the suspension beam (32). It also includes... The outer surface of the corrugated pipe (1) and the surface of the positioning rib (6) are attached to each other and fixed by iron wire. The two sides of the positioning rib (6) are fixed by iron wire and second stirrup (5). Positioning ring (17): The outer surface of the corrugated pipe (1) is fixedly connected to the positioning ring (17), and the outer surface of the positioning ring (17) is provided with a connecting groove (18).

2. The reinforcement structure for a large-span prestressed beam according to claim 1, characterized in that: The outer surface of the second stirrup (5) is connected to the first stirrup (4) by wire, and the first stirrup (4) wraps around the outside of the second stirrup (5).

3. The large-span prestressed beam reinforcement structure according to claim 1, characterized in that: The connecting groove (18) has four sets on the positioning ring (17). The connecting groove (18) is slidably connected to the connecting shell (9), and the connecting shell (9) is slidably connected to the connecting rib (8).

4. The reinforcement structure for a large-span prestressed beam according to claim 3, characterized in that: The connecting rib (8) has an insert (10) inside, and the outer surface of the insert (10) has a lubrication ring (11).

5. The reinforcement structure for a large-span prestressed beam according to claim 4, characterized in that: One end of the insert (10) is fixedly connected to a connecting post (12), and one end of the connecting post (12) is fixedly connected to a rotating screw (13).

6. The reinforcement structure for a large-span prestressed beam according to claim 5, characterized in that: The rotating screw (13) and the threaded groove inside the connecting shell (9) are in contact with each other. The bottom end of the rotating screw (13) and the extrusion plate (14) are in contact with each other. One end of the extrusion plate (14) is fixedly connected to the first spring (15). One end of the first spring (15) is fixedly connected to the base (16). One side surface of the base (16) is fixedly connected to the connecting shell (9). One end of the connecting rib (8) is fixedly connected to a fixing ring (7).

7. The reinforcement structure for a large-span prestressed beam according to claim 1, characterized in that: The positioning ring (17) has an extrusion groove (19) inside, and a second spring (21) is provided inside the extrusion groove (19). An extrusion piece (20) is fixedly connected to one side surface of the second spring (21).

8. The reinforcement structure for a large-span prestressed beam according to claim 7, characterized in that: The second spring (21) is provided in three sets below the extrusion plate (20), and the extrusion plate (20) is provided in four sets inside the extrusion groove (19).

9. The reinforcement structure for a large-span prestressed beam according to claim 1, characterized in that: It also includes, A fixing nut (25) is fixedly connected to an upper plate (22) on the outer surface of the concrete (3), and a side panel (23) is fixedly connected to the outer surface of the upper plate (22). A threaded rod (24) is provided on the outer surface of the side panel (23). Angle steel (30), one end of the threaded rod (24) is threadedly connected to a connecting shell (26), and a rotating shaft (27) is fixedly connected to the outer surface of the connecting shell (26). The rotating shaft (27) is set in a rotating groove (31), and the rotating groove (31) is opened on both ends of the angle steel (30).

10. A large-span prestressed structural beam reinforcement structure according to claim 9, characterized in that: The outer surface of the connecting shell (26) is fixedly connected to a first threaded plate (28), and the outer surface of the corner steel (30) is fixedly connected to a second threaded plate (29). The first threaded plate (28) and the second threaded plate (29) are combined to form a threaded groove.

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