A prestressed anchor for highway bridge construction

Abstract

This invention discloses a prestressed anchor for highway bridge construction, comprising a fixed anchor plate with multiple steel strands inserted therethrough. Multiple grouting holes are provided along the edge of the fixed anchor plate. A threaded sleeve is provided on one side of the fixed anchor plate, and an annular disc is provided on the other side. Multiple clamping plates are provided at the end of the threaded sleeve away from the fixed anchor plate, and helical reinforcements are fitted onto the surface of the clamping plates. One end of each helical reinforcement is fixedly connected to the threaded sleeve. The multiple steel strands pass through the threaded sleeve and clamping plates. Multiple locking slots are provided along the edge of the annular disc. This invention applies pressure to the steel strands from the sides in opposite directions, causing lateral torsional deformation. The deformed steel strands are better fixed to the fixed anchor plate, thus effectively ensuring the stability of the overall structure.

Description

Technical Field

[0001] This invention belongs to the field of prestressed anchorage technology, and particularly relates to a prestressed anchorage for highway bridge construction. Background Technology

[0002] Prestressed anchorages are permanent anchoring devices used in prestressed concrete. In post-tensioned structures or components, they are anchoring tools used to maintain the tension of the prestressing tendons and transfer it into the concrete. They are installed at the ends of the prestressing tendons and can maintain the prestressing tendons in an anchored state throughout the tensioning process.

[0003] The prior art document (publication number CN112240001A) discloses a prestressed anchorage for highway bridge construction, including steel strands, with a connecting mechanism sleeved on the outer side of the steel strands; the connecting mechanism includes a first sleeve, a corrugated pipe, a baffle, a plug, and a second sleeve; a corrugated pipe is provided on the right side of the first sleeve, and the right end of the first sleeve is fixedly connected to the left end of the corrugated pipe; a baffle is provided on the left side of the first sleeve, and the left end of the first sleeve is fixedly connected to the right side of the baffle; a plug is provided on the left side of the baffle.

[0004] Compared with existing technologies, steel strands installed on anchor plates need to be fixed with multiple bolts. Fixing with a single bolt can easily cause the steel strands to slip during use due to loss of tension. Using a single fixing method has limited effectiveness in fixing the steel strands, which may affect the subsequent construction results. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes a prestressed anchor for highway bridge construction.

[0006] This invention proposes a prestressed anchor for highway bridge construction, comprising a fixed anchor plate with multiple steel strands inserted therethrough. Multiple grouting holes are provided along the edge of the fixed anchor plate. A threaded sleeve is provided on one side of the fixed anchor plate, and an annular disc is provided on the other side. Multiple clamping plates are provided at the end of the threaded sleeve away from the fixed anchor plate. Helical reinforcements are sleeved on the surface of the clamping plates, and one end of each helical reinforcement is fixedly connected to the threaded sleeve. Multiple steel strands pass through the threaded sleeve and the clamping plates.

[0007] The annular disc has multiple slots on its edge, and a first strip of steel wire is wound between the multiple slots. The first strip of steel wire is also wound with multiple strands of steel wire. A second strip of steel wire is also wound between the multiple strands of steel wire. The second strip of steel wire is located on one side of the first strip of steel wire. The two ends of the first strip of steel wire are fixed together by a first clamping mechanism, and the two ends of the second strip of steel wire are fixed together by a second clamping mechanism.

[0008] A baffle is snapped onto the surface of the annular disk, and multiple steel strands pass through the baffle, which is fixedly connected to the annular disk.

[0009] Preferably, each of the steel strands uses two bayonets, and a protrusion is provided between the two bayonets. The first strip steel wire enters from one bayonet, passes around the steel strand and the protrusion, and exits from the bayonet on the other side. The first strip steel wire is wound in a sequence in which the steel strand and the bayonets are spaced apart from each other. The first clamping mechanism is located on the outer side of the annular disc.

[0010] Preferably, the first clamping mechanism includes a first steel bar and a first collar. The first steel bar is wound around both ends of a first strip-shaped steel wire. Both ends of the first steel bar pass through the first collar. The first collar is located on one side of the first strip-shaped steel wire and is bent back after passing through the two ends of the first collar.

[0011] Preferably, the edge of the baffle is provided with a plurality of connecting blocks corresponding to the protrusions, and each connecting block is fixedly provided with a shaft on the side facing the protrusion. The shaft passes through the protrusion and a nut is threaded onto the shaft.

[0012] Preferably, the second strip-shaped steel wire is wrapped around the outside of a plurality of outer steel strands, and the two ends of the second strip-shaped steel wire cross and pass through the two sides of the steel strand located in the middle position. The second clamping mechanism includes a second steel bar and a second collar. The second steel bar is tied to the two ends of the second strip-shaped steel wire, and the second collar is sleeved on both ends of the second steel bar. The second collar is disposed on one side of the second strip-shaped steel wire, and a retaining pin is inserted into the second collar, which engages with the second steel bar.

[0013] Preferably, the surfaces of the plurality of steel strands are wrapped with binding straps, which bind the plurality of steel strands together, and the spiral reinforcement is conical.

[0014] Preferably, a ring is fixedly installed at one end of the threaded sleeve near the clamping plate, and the spiral rib is fixedly connected to the ring.

[0015] Preferably, the baffle has an opening for placing the second clamping mechanism.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The first strip of steel wire applies pressure from one side of each strand of steel wire, and the second strip of steel wire applies pressure from the other side of each strand of steel wire. The pressure directions on both sides are opposite. Applying pressure to the strand of steel wire from the side will cause corresponding transverse torsional deformation of the strand of steel wire. The strand of steel wire after torsion deformation can be better fixed and connected to the fixed anchor plate, thereby effectively ensuring the stability of its overall structure.

[0018] 2. When assembling this device, the first and second strip steel wires are elastic and bendable. They are bent and passed through both sides of each protrusion. When passing through the slots on both sides of the protrusion, they also pass around one side of the steel strand. Each outer steel strand corresponds to two slots. When the first strip steel wire passes through the two slots, it can effectively apply a force to one side of the outer steel strand. Thus, each steel strand set on the outside will be subjected to a pulling force on one side. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a prestressed anchorage for highway bridge construction proposed in this invention;

[0020] Figure 2 This is a side view of a prestressed anchorage for highway bridge construction proposed in this invention.

[0021] Figure 3 This is a schematic diagram of the bottom structure of a prestressed anchorage for highway bridge construction proposed in this invention;

[0022] Figure 4 This is a schematic diagram of the side structure of the second strip of steel wire;

[0023] Figure 5 This is a schematic diagram of the front structure of the second strip of steel wire;

[0024] Figure 6 This is a schematic diagram of the structure of the first strip of steel wire;

[0025] Figure 7 This is a schematic diagram of the planar structure of the first and second strip-shaped steel wires.

[0026] In the diagram: 1. Fixed anchor plate, 2. Threaded sleeve, 3. Annular disc, 4. Steel strand, 5. Clamping plate, 6. Spiral reinforcement, 7. Baffle, 8. Insert shaft, 9. Nut, 10. Protrusion, 11. First strip steel wire, 12. Clamp, 13. Second strip steel wire, 14. Grouting hole, 15. First steel bar, 16. First collar, 17. Second steel bar, 18. Clamping shaft, 19. Second collar, 20. Opening, 21. Connecting block. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figure 1-7 A prestressed anchor for highway bridge construction includes a fixed anchor plate 1, with multiple steel strands 4 inserted on the fixed anchor plate 1. Multiple grouting holes 14 are opened on the edge of the fixed anchor plate 1. A threaded sleeve 2 is provided on one side of the fixed anchor plate 1, and an annular disc 3 is provided on the other side of the fixed anchor plate 1. Multiple clamping plates 5 are provided at the end of the threaded sleeve 2 away from the fixed anchor plate 1. Spiral reinforcement 6 is sleeved on the surface of the clamping plate 5. One end of the spiral reinforcement 6 is fixedly connected to the threaded sleeve 2. Multiple steel strands 4 pass through the threaded sleeve 2 and the clamping plate 5.

[0029] The annular disk 3 has multiple slots 12 on its edge. A first strip of steel wire 11 is wound between the multiple slots 12. The first strip of steel wire 11 is also wound with multiple strands of steel wire 4. A second strip of steel wire 13 is also wound between the multiple strands of steel wire 4. The second strip of steel wire 13 is located on one side of the first strip of steel wire 11. The two ends of the first strip of steel wire 11 are fixed together by a first clamping mechanism. The two ends of the second strip of steel wire 13 are fixed together by a second clamping mechanism.

[0030] A baffle 7 is snapped onto the surface of the annular disk 3, and multiple steel strands 4 pass through the baffle 7, which is fixedly connected to the annular disk 3.

[0031] Each steel strand 4 uses two clamps 12, with a protrusion 10 between them. A first strip of steel wire 11 enters from one clamp 12, passes around the steel strand 4 and the protrusion 10, and exits from the other clamp 12. The first strip of steel wire 11 is wound in a sequence that alternates between the steel strand 4 and the clamps 12. The first clamping mechanism is located on the outer side of the annular disc 3. When fixing each steel strand 4, the first strip of steel wire 11 pulls on one side of each steel strand 4, causing the steel strand 4 to shift to one side. The first strip of steel wire 11 passes through the steel strand 4 and the clamps 12 in a serpentine manner, ensuring that one side of each steel strand 4 is stressed and that it can reach all the surrounding steel strand 4.

[0032] The first clamping mechanism includes a first steel bar 15 and a first collar 16. The first steel bar 15 is wound around both ends of the first strip-shaped steel wire 11, and both ends of the first steel bar 15 pass through the first collar 16. The first collar 16 is located on one side of the first strip-shaped steel wire 11, and the two ends passing through the first collar 16 are bent back. The two ends of the first strip-shaped steel wire 11 are fixed by the first clamping mechanism. First, the first steel bar 15 binds the two ends of the first strip-shaped steel wire 11 together from one side. Then, the two ends of the first steel bar 15 are limited by the first collar 16. Finally, the first steel bar 15 is bent back, thereby fixing the position of the first steel bar 15.

[0033] The edge of the baffle 7 is provided with multiple connecting blocks 21 corresponding to the protrusions 10. Each connecting block 21 has a fixed insert shaft 8 on the side facing the protrusion 10. The insert shaft 8 passes through the protrusion 10 and is threaded with a nut 9. The baffle 7 limits and fixes the first strip steel wire 11 and the second strip steel wire 13. Each insert shaft 8 installed on the baffle 7 is inserted into the protrusion 10, and then the position of the insert shaft 8 is fixed by the nut 9, thereby fixing the first strip steel wire 11 and the second strip steel wire 13.

[0034] The second strip of steel wire 13 is wrapped around the outside of multiple outer strands of steel wire 4, and the two ends of the second strip of steel wire 13 cross and pass through the two sides of the steel strand 4 located in the middle position. The second clamping mechanism includes a second steel bar 17 and a second collar 19. The second steel bar 17 is tied to the two ends of the second strip of steel wire 13, and the second collar 19 is sleeved on both ends of the second steel bar 17. The second collar 19 is located on one side of the second strip of steel wire 13, and a retaining pin 18 is inserted into the second collar 19, which engages with the second steel bar 17. The two ends of the second strip of steel wire 13 are fixed by the second clamping mechanism. First, the two ends of the second strip of steel wire 13 are tied together by the second steel bar 17. Then, the two ends of the second steel bar 17 are fixed by the second collar 19. Finally, the retaining pin 18 is inserted into the second collar 19 to fix the position of the second collar 19.

[0035] Multiple steel strands 4 are wrapped with binding straps, which bind the steel strands 4 together. The spiral rib 6 is conical. The conical spiral rib 6 helps to gather the individual steel strands 4 together, and the binding straps are used to fix the multiple steel strands 4 together. A ring is fixedly installed at one end of the threaded sleeve 2 near the clamping plate 5, and the spiral rib 6 is fixedly connected to the ring. The ring serves to install and fix the spiral rib 6 and the clamping plate 5. An opening 20 is provided on the baffle 7 for placing the second clamping mechanism. Since the second strip steel wire 13 is located on the outside, the opening 20 is provided on the surface of the baffle 7 to avoid obstructing the second clamping mechanism.

[0036] When assembling this device, multiple steel strands 4 are passed through the threaded sleeve 2 and the fixed anchor plate 1. The ends of each clamp 5 are fixed by the first strip steel wire 11 and the second strip steel wire 13. The first strip steel wire 11 and the second strip steel wire 13 are elastic and bendable. They are bent and passed through both sides of each protrusion 10. When they pass through the slots 12 on both sides of the protrusion 10, they also pass around one side of the steel strand 4. Each outer steel strand 4 corresponds to two slots 12. When the first strip steel wire 11 passes through the two slots 12, it can effectively apply a force to one side of the outer steel strand 4. Then each steel strand 4 set on the outside will be subjected to a pulling force on one side.

[0037] The two ends of the first strip steel wire 11 are fixed by the first clamping mechanism. The wire is wrapped around the end of the first strip steel wire 11. When binding the two ends of the first strip steel wire 11, the two ends are pulled tight. Then the two ends of the first steel strip 15 are joined together and the first loop 16 is put on. Finally, the excess two ends are bent back to both sides, so as to achieve the corresponding fixing effect of the first strip steel wire 11.

[0038] A second steel wire 13 is attached to the outside of each steel strand 4. The second steel wire 13 is arranged around the outer steel strand 4. The two ends of the second steel wire 13 pass through the two steel strands 4, that is, through the middle of each steel strand 4. During the passing process, the steel strand 4 in the middle position is wound accordingly. When it is wound through the middle steel strand 4, it finally comes out from the outside, tightening the second steel wire 13. A second steel bar 17 is tied to its two ends. The two ends of the second steel bar 17 are joined together by a second collar 19. The position of the second collar 19 is fixed by a retaining pin 18.

[0039] Finally, the baffle 7 is inserted into the annular disk 3 from one side. The connecting block 21 at the edge of the baffle 7 passes through each protrusion 10 through the insert shaft 8, and the position of the insert shaft 8 is fixed by the nut 9. Thus, the baffle 7 presses, fixes and restricts the first strip steel wire 11 and the second strip steel wire 13.

[0040] The first strip of steel wire 11 applies pressure from one side of each strand of steel wire 4, and the second strip of steel wire 13 applies pressure from the other side of each strand of steel wire 4. The pressure directions on both sides are opposite. Applying pressure to the strand of steel wire 4 from the side will cause corresponding transverse torsional deformation of the strand of steel wire 4. The strand of steel wire 4 after being torn and deformed can be better fixed and connected to the fixed anchor plate 1, thereby effectively ensuring the stability of its overall structure.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A prestressed anchorage for highway bridge construction, comprising a fixed anchor plate (1), wherein a plurality of steel strands (4) are inserted on the fixed anchor plate (1), characterized in that, The fixed anchor plate (1) has multiple grouting holes (14) on its edge. A threaded sleeve (2) is provided on one side of the fixed anchor plate (1), and an annular disc (3) is provided on the other side of the fixed anchor plate (1). Multiple clamping plates (5) are provided at the end of the threaded sleeve (2) away from the fixed anchor plate (1). A spiral rib (6) is sleeved on the surface of the clamping plate (5). One end of the spiral rib (6) is fixedly connected to the threaded sleeve (2). Multiple steel strands (4) pass through the threaded sleeve (2) and the clamping plate (5). The annular disk (3) has multiple slots (12) on its edge. A first strip of steel wire (11) is wound between the multiple slots (12). The first strip of steel wire (11) is also wound with multiple strands of steel wire (4). A second strip of steel wire (13) is also wound between the multiple strands of steel wire (4). The second strip of steel wire (13) is located on one side of the first strip of steel wire (11). The two ends of the first strip of steel wire (11) are fixed together by a first clamping mechanism. The two ends of the second strip of steel wire (13) are fixed together by a second clamping mechanism. A baffle (7) is snapped onto the surface of the annular disk (3), and multiple steel strands (4) pass through the baffle (7). The baffle (7) is fixedly connected to the annular disk (3). The first strip of steel wire (11) applies pressure from one side of each strand of steel wire (4), and the second strip of steel wire (13) applies pressure from the other side of each strand of steel wire (4). The pressure directions on both sides are opposite, and pressure is applied to the strand of steel wire (4) from the side, causing corresponding transverse torsional deformation. The strand of steel wire (4) after torsion deformation can be better fixed and connected to the fixed anchor plate (1) to ensure the stability of its overall structure. Each of the steel strands (4) uses two bayonets (12), and a protrusion (10) is provided between the two bayonets (12). The first strip steel wire (11) enters from one side of the bayonet (12), passes around the steel strand (4) and the protrusion (10), and exits from the other side of the bayonet (12). The first strip steel wire (11) is wound in a sequence in which the steel strands (4) and the bayonets (12) are spaced apart from each other. The first clamping mechanism is located on the outer side of the annular disc (3). The second strip-shaped steel wire (13) is wrapped around the outside of a plurality of outer steel strands (4), and the two ends of the second strip-shaped steel wire (13) cross and pass through the two sides of the steel strand (4) located in the middle position. The second clamping mechanism includes a second steel bar (17) and a second collar (19). The second steel bar (17) is tied to the two ends of the second strip-shaped steel wire (13). The second collar (19) is sleeved on both ends of the second steel bar (17). The second collar (19) is set on one side of the second strip-shaped steel wire (13). A retaining pin (18) is inserted on the second collar (19). The retaining pin (18) is engaged with the second steel bar (17).

2. The prestressed anchorage for highway bridge construction according to claim 1, characterized in that, The first clamping mechanism includes a first steel bar (15) and a first collar (16). The first steel bar (15) is wound around both ends of the first strip-shaped steel wire (11). Both ends of the first steel bar (15) pass through the first collar (16). The first collar (16) is located on one side of the first strip-shaped steel wire (11) and is bent back through both ends of the first collar (16).

3. A prestressed anchorage for highway bridge construction according to claim 1, characterized in that, The edge of the baffle (7) is provided with a plurality of connecting blocks (21) corresponding to the protrusion (10). Each connecting block (21) is fixedly provided with a shaft (8) on the side facing the protrusion (10). The shaft (8) passes through the protrusion (10) and a nut (9) is threaded onto the shaft (8).

4. A prestressed anchorage for highway bridge construction according to claim 1, characterized in that, The surfaces of multiple steel strands (4) are wrapped with binding straps that bind the multiple steel strands (4) together, and the spiral rib (6) is conical.

5. A prestressed anchorage for highway bridge construction according to claim 1, characterized in that, A ring is fixedly installed at one end of the threaded sleeve (2) near the clamping plate (5), and the spiral rib (6) is fixedly connected to the ring.

6. A prestressed anchorage for highway bridge construction according to claim 3, characterized in that, The baffle (7) has an opening (20) for placing the second clamping mechanism.

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