Retard-bonded vertical prestressed steel bar

Abstract

The utility model discloses a retard-bonded vertical prestressed steel bar which comprises a steel bar main body assembly, and the steel bar main body assembly comprises an outer sheath, a retard-bonded adhesive layer, a prestressed steel bar, two threaded connection parts and a rib groove. The outer sheath is sleeved outside the prestressed steel bar, and the delayed coagulation adhesive layer is filled between the outer sheath and the prestressed steel bar. According to the utility model, the outer sheath and the pre-stressed steel bar are bonded through the delayed coagulation adhesive layer, no additional corrugated pipe is needed, the processes of strand pulling, grouting and the like are omitted, the operation is simplified, the conditions of unsaturation and voids during grouting are avoided, and the service life of the pre-stressed steel bar is prolonged. In a preset period after construction is completed, the prestressed steel bar and the surrounding concrete generate a bonding effect through the solidified retarding adhesive, the prestressed steel bar and the surrounding concrete form a whole and work together, the bonding effect is achieved, the phenomenon that the prestressed steel bar leaks out after being fractured during construction and operation is avoided, and the stability of the structure is enhanced.

Description

Technical Field

[0001] The utility model relates to a prestressed steel bar, in particular to a slow-bonding vertical prestressed steel bar, belonging to the technical field of prestressed steel bars. Background Technique

[0002] A prestressed steel bar refers to a steel bar material that has a preset stress state after prestressing is applied in a concrete member in advance. Prestressed steel bars are mainly used in prestressed components in concrete buildings, such as beams, slabs, columns, etc. By prestressing in advance, the prestressed steel bar makes the internal concrete generate pressure, thereby improving the bearing capacity, seismic resistance, wind resistance and crack resistance of the concrete structure. The use of prestressed steel bars enhances the stability and safety of the structure and improves the overall quality of the building.

[0003] In the process of using the existing prestressed steel bars, bellows are required and the bellows are tied manually. Since the tying space is small, it is not conducive to the operation of workers. Then, processes such as strand threading and grouting are carried out. The operation is relatively complex, and there are phenomena of unsaturation and voids in the prestressed duct during grouting. The creep loss of prestress of the prestressed tendon is relatively large, and the segregation of the grout causes corrosion of the prestressed tendon, resulting in insufficient prestress and unstable structure. Therefore, a slow-bonding vertical prestressed steel bar is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a slow-bonding vertical prestressed steel bar to solve one of the problems raised in the above background technique.

[0005] The utility model is implemented by the following technical solutions: a slow-bonding vertical prestressed steel bar, including a steel bar main body assembly, and the steel bar main body assembly includes an outer sheath, a slow-setting adhesive layer, a prestressed steel bar, two threaded connection parts and rib grooves;

[0006] The outer sheath is sleeved outside the prestressed steel bar, the slow-setting adhesive layer is filled between the outer sheath and the prestressed steel bar, the prestressed steel bar is bonded to the outer sheath through the slow-setting adhesive layer, rib grooves are uniformly arranged on the outer side wall of the outer sheath, the rib grooves are located between two adjacent spiral transverse ribs on the outer wall of the prestressed steel bar, and the two threaded connection parts are symmetrically and fixedly connected to the outer side wall of the prestressed steel bar.

[0007] As a further preference of this technical solution: the threaded connection part and the prestressed steel bar are of an integral structure.

[0008] As a further preference of this technical solution: an anchoring assembly is arranged outside the prestressed steel bar, and the anchoring assembly includes an anchoring backup nut, an anchoring nut, two anchoring backing plates, a spiral rib and two anchoring baffles;

[0009] The anchoring backup nut and the anchoring nut are both threadedly connected to the outer wall of the threaded connection part. The spiral rib is sleeved on the outside of the prestressed steel bar, and the two anchoring backing plates and the two anchoring baffles are symmetrically sleeved on the outside of the prestressed steel bar.

[0010] As a further preference of this technical solution: A second installation hole is formed inside the anchoring backing plate, and the anchoring backing plate is slidably connected to the outer wall of the prestressed steel bar through the second installation hole.

[0011] As a further preference of this technical solution: A first installation hole is formed inside the anchoring baffle, and the anchoring baffle is slidably connected to the outer wall of the prestressed steel bar through the first installation hole.

[0012] As a further preference of this technical solution: The anchoring nut is located between the anchoring baffle and the anchoring backing plate, and the anchoring backup nut is located on the side of the anchoring baffle away from the anchoring backing plate.

[0013] As a further preference of this technical solution: The two anchoring backing plates are symmetrically located on both sides of the outer sheath.

[0014] As a further preference of this technical solution: The spiral rib is sleeved on the outside of the outer sheath, and the spiral rib is located between the two anchoring backing plates.

[0015] Advantages of the present utility model: The present utility model bonds the outer sheath and the prestressed steel bar through the retarder adhesive layer. During use, there is no need to additionally use a corrugated pipe, eliminating processes such as cable threading and grouting, simplifying the operation, and avoiding situations of unsaturation and voids during grouting. Moreover, when in use, the concrete has a strong grip on the slow-bonded vertical prestressed steel bar. During a predetermined period after construction, the prestressed steel bar generates a bonding effect with the surrounding concrete through the cured retarder adhesive, and the prestressed steel bar and the surrounding concrete form an integral body and work together to achieve a bonded effect. There will be no phenomenon of breakage and extrusion during construction and operation, enhancing the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a structural schematic diagram of the present utility model;

[0018] Figure 2 It is a connection schematic diagram of the steel bar main body assembly and the anchoring assembly of the present utility model;

[0019] Figure 3 Schematic structural diagram of the steel bar main body assembly of the present utility model;

[0020] Figure 4 Cross-sectional view of the steel bar main body assembly of the present utility model.

[0021] In the figure: 101, steel bar main body assembly; 11, outer sheath; 12, retarder adhesive layer; 13, prestressed steel bar; 14, threaded connection part; 15, rib groove; 301, anchoring assembly; 31, anchoring backup nut; 32, anchoring nut; 33, anchoring backing plate; 34, spiral rib; 35, anchoring baffle; 36, first mounting hole; 37, second mounting hole. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0023] Embodiment

[0024] Please refer to Figures 1-4 , the present utility model provides a technical solution: a slow-bonding vertical prestressed steel bar, including a steel bar main body assembly 101, and the steel bar main body assembly 101 includes an outer sheath 11, a retarder adhesive layer 12, a prestressed steel bar 13, two threaded connection parts 14 and rib grooves 15;

[0025] The outer sheath 11 is sleeved outside the prestressed steel bar 13, the retarder adhesive layer 12 is filled between the outer sheath 11 and the prestressed steel bar 13, the prestressed steel bar 13 is bonded to the outer sheath 11 through the retarder adhesive layer 12, rib grooves 15 are uniformly arranged on the outer side wall of the outer sheath 11, the rib grooves 15 are located between two adjacent spiral transverse ribs on the outer wall of the prestressed steel bar 13, and two threaded connection parts 14 are symmetrically and fixedly connected to the outer side wall of the prestressed steel bar 13;

[0026] The slow-bonding vertical prestressed steel bar adopts the process of online coating of retarder adhesive and hot extrusion continuous forming for the prestressed steel bar 13. During use, the concrete has a strong grip on the slow-bonding vertical prestressed steel bar, and within a predetermined period after the construction is completed, the prestressed steel bar 13 generates a bonding effect with the surrounding concrete through the cured retarder binder. The prestressed steel bar 13 and the surrounding concrete form an integral body and work together to achieve a bonded effect, and there will be no phenomenon of breakage and extrusion during construction and operation;

[0027] The steel bar main body assembly 101 is produced with a fixed length during production. It uses a front-end extension rod for tensioning, eliminating the need to reserve the working length of the jack for the steel bars. After tensioning, it doesn't require cutting the bars and can be directly sealed with an anchor, eliminating the need for secondary grouting. This simplifies the construction process, saves a lot of time, and greatly shortens the construction period.

[0028] In this embodiment, specifically: The threaded connection part 14 and the prestressed steel bar 13 are of an integral structure. An anchoring assembly 301 is arranged outside the prestressed steel bar 13. The anchoring assembly 301 includes an anchoring backup nut 31, an anchoring nut 32, two anchoring backing plates 33, a spiral stirrup 34, and two anchoring baffles 35.

[0029] Both the anchoring backup nut 31 and the anchoring nut 32 are threadedly connected to the outer side wall of the threaded connection part 14. The spiral stirrup 34 is sleeved outside the prestressed steel bar 13, and the two anchoring backing plates 33 and the two anchoring baffles 35 are symmetrically sleeved outside the prestressed steel bar 13.

[0030] The anchoring nut 32 is located between the anchoring baffle 35 and the anchoring backing plate 33, and the anchoring backup nut 31 is located on the side of the anchoring baffle 35 away from the anchoring backing plate 33.

[0031] Through the anchoring nut 32, the anchoring backing plate 33 can be securely anchored to the ground, preventing the anchoring backing plate 33 from tipping or shifting under external forces, and effectively transmitting the load perpendicular to the anchoring surface to the deep foundation through tension, thereby improving the bearing capacity of the structure. And through the anchoring backup nut 31, additional fastening force can be provided or used as a safety backup to prevent the anchoring nut 32 from loosening or failing.

[0032] In this embodiment, specifically: A second installation hole 37 is formed inside the anchoring backing plate 33, and the anchoring backing plate 33 is slidably connected to the outer side wall of the prestressed steel bar 13 through the second installation hole 37.

[0033] During use, the anchoring backing plate 33 can transfer prestress, preventing the concrete at the anchoring part from cracking and settling, thereby ensuring the stability and safety of the prestressed concrete structure.

[0034] In this embodiment, specifically: A first installation hole 36 is formed inside the anchoring baffle 35, and the anchoring baffle 35 is slidably connected to the outer side wall of the prestressed steel bar 13 through the first installation hole 36.

[0035] The anchoring baffle 35 is used to provide additional support and fixation to prevent the prestressed steel bar 13 from displacing or deforming during concrete pouring or tensioning.

[0036] In this embodiment, specifically: the spiral rib 34 is sleeved outside the outer sheath 11. The spiral rib 34 is located between two anchoring pads 33. During use, the spiral rib 34 can prevent the prestressed steel bar 13 from buckling under force and fix the position of the prestressed steel bar 13. At the same time, it forms a framework with the prestressed steel bar 13 to ensure the framework stiffness, play a role in restraining the concrete inside the core, and improve the bearing capacity of the component.

[0037] Working principle or structural principle. During use, the prestressed steel bar 13 is installed in the formwork box through the anchoring assembly 301, and then concrete is poured. The concrete wraps around the outside of the slow-bonding vertical prestressed steel bar. Through the rib grooves 15, the contact area between the concrete and the outer sheath 11 can be increased. After construction, the prestressed steel bar 13 generates a bonding effect with the surrounding concrete through the cured slow-setting binder. The prestressed steel bar 13 and the surrounding concrete form an integral body and work together to achieve a bonded effect. Through the cooperation of the anchoring nut 32 and the anchoring pad 33, prestress can be applied to increase the stability of the concrete structure.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slow-bonding vertical prestressed steel bar, characterized in that, It includes a steel bar main body assembly (101), and the steel bar main body assembly (101) includes an outer sheath (11), a retardant adhesive layer (12), a prestressed steel bar (13), two threaded connection parts (14) and rib grooves (15); The outer sheath (11) is sleeved outside the prestressed steel bar (13), the retardant adhesive layer (12) is filled between the outer sheath (11) and the prestressed steel bar (13), the prestressed steel bar (13) is bonded to the outer sheath (11) through the retardant adhesive layer (12), rib grooves (15) are uniformly arranged on the outer side wall of the outer sheath (11), the rib grooves (15) are located between two adjacent spiral transverse ribs on the outer wall of the prestressed steel bar (13), and the two threaded connection parts (14) are symmetrically and fixedly connected to the outer side wall of the prestressed steel bar (13).

2. The slow-bonding vertical prestressed steel bar according to claim 1, characterized in that, The threaded connection part (14) and the prestressed steel bar (13) are of an integral structure.

3. The slow-bonding vertical prestressed steel bar according to claim 2, wherein An anchoring assembly (301) is arranged outside the prestressed steel bar (13), and the anchoring assembly (301) includes an anchoring backup nut (31), an anchoring nut (32), two anchoring backing plates (33), a spiral stirrup (34) and two anchoring baffles (35); Both the anchoring backup nut (31) and the anchoring nut (32) are threadedly connected to the outer side wall of the threaded connection part (14), the spiral stirrup (34) is sleeved outside the prestressed steel bar (13), and the two anchoring backing plates (33) and the two anchoring baffles (35) are symmetrically sleeved outside the prestressed steel bar (13).

4. The slow-bonding vertical prestressed steel bar according to claim 3, characterized in that, A second installation hole (37) is formed inside the anchoring backing plate (33), and the anchoring backing plate (33) is slidably connected to the outer side wall of the prestressed steel bar (13) through the second installation hole (37).

5. A slow-bonding vertical prestressed steel bar according to claim 4, characterized in that, A first installation hole (36) is formed inside the anchoring baffle (35), and the anchoring baffle (35) is slidably connected to the outer side wall of the prestressed steel bar (13) through the first installation hole (36).

6. A slow-bonded vertical prestressed steel bar according to claim 5, characterized in that, The anchoring nut (32) is located between the anchoring baffle (35) and the anchoring backing plate (33), and the anchoring backup nut (31) is located on the side of the anchoring baffle (35) away from the anchoring backing plate (33).

7. The slow-bonding vertical prestressed steel bar according to claim 6, characterized in that, The two anchoring backing plates (33) are symmetrically located on both sides of the outer sheath (11).

8. A slow-bonding vertical prestressed steel bar according to claim 3, characterized in that, The spiral stirrup (34) is sleeved outside the outer sheath (11), and the spiral stirrup (34) is located between the two anchoring backing plates (33).

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