CN216275229U - P anchor for main tower cross beam of cable-stayed bridge - Google Patents
P anchor for main tower cross beam of cable-stayed bridge Download PDFInfo
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- CN216275229U CN216275229U CN202122803010.7U CN202122803010U CN216275229U CN 216275229 U CN216275229 U CN 216275229U CN 202122803010 U CN202122803010 U CN 202122803010U CN 216275229 U CN216275229 U CN 216275229U
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- stayed bridge
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Abstract
The utility model relates to the technical field of construction of main tower cross beams of cable-stayed bridges, in particular to a P anchor for a main tower cross beam of a cable-stayed bridge, which comprises a P anchor plate, an extrusion anchor, a steel strand, a restraint ring and a corrugated pipe, wherein the P anchor plate is an anchoring end; the beneficial effects are as follows: in the utility model, the P anchor plate and the extrusion anchor are arranged on one side of the anchoring end of the anchor, so that the section centroids of the prestressed tendons of the cross beam are always on the same straight line in the asynchronous tensioning process, and the force transmission effect is improved.
Description
Technical Field
The utility model relates to the technical field of construction of main tower cross beams of cable-stayed bridges, in particular to a P anchor for a main tower cross beam of a cable-stayed bridge.
Background
The main tower beam of the cable-stayed bridge is an important transverse connection component of the cable tower and forms a frame structure together with the tower column. The construction of the cable tower beam directly affects the overall quality and safety of the bridge. The cross beam of the cable-stayed bridge is used as a part of a key stress system of the whole structure, the self weight of the bridge and the automobile load are transmitted to the main tower through the cross beam, and the force is transmitted to the foundation through the main tower, so that the cross beam of the cable-stayed bridge is very important in the design and construction of the bridge. The prestress tensioning is an important link in the construction of the cross beam, and has good effects on reducing the dead weight of the cross beam, improving the concrete strength of the cross beam and the like. In the prestressed post-tensioning construction of a cross beam of a cable-stayed bridge, due to the restriction of a steel corbel embedded part, the prestressed tendon of the cross beam cannot be synchronously tensioned at two ends, and the traditional single-end tensioning method ensures that the section centroids of prestressed tendons at two ends of the cross beam are not in the same straight line in the asynchronous tensioning process, thereby influencing the structure safety and the control of the tensioning effect.
Therefore, in order to effectively improve the control on the tensioning effect in the asynchronous tensioning process of the prestressed tendons of the cross beam, the P anchor for the main tower cross beam of the cable-stayed bridge is provided, the tensioning effect of the prestressed tendons of the cross beam in the asynchronous tensioning process can be effectively improved, and the construction is simple.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a P anchor for a main tower cross beam of a cable-stayed bridge, which is used for solving the technical problems in the background technology.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a P anchor for cable-stay bridge king-tower crossbeam which characterized in that: including P anchor slab 1, extrusion anchor 2, steel strand wires 3 and restraint circle 4, P anchor slab 1 is the anchor end, the one end cover of steel strand wires 3 is equipped with extrusion anchor 2, round hole on P anchor slab 1 is passed to steel strand wires 3 from P anchor slab 1 just, reverse side symmetry respectively, the one end of steel strand wires 3 is fixed in anchor end one side with extrusion anchor 2 and P anchor slab 1, the other end of steel strand wires 3 passes restraint circle 4 respectively and wears out from bellows 7 in the crossbeam and arrange in the crossbeam both sides, the other end of steel strand wires 3 is for stretching the end.
Preferably, 44 round holes 101 are symmetrically arranged on the P anchor plate 1, are symmetrically arranged in a diamond shape, and are accurately fixed on the positioning steel bars inside the cross beam.
Preferably, the aperture of the circular hole 101 is 1 cm.
Preferably, the extruded anchor 2 comprises a connecting sleeve 5 and a threaded steel wire sheath 6 arranged inside the connecting sleeve 5.
Preferably, the restraining ring 4 is a circular sleeve, and is precisely fixed on the beam positioning steel bars on two sides of the P anchor plate 1.
Preferably, the distance between the P anchor plate 1 and the restraining rings 4 on the two sides of the P anchor plate is 70 cm.
Preferably, the confinement rings 4 have a diameter of 14 cm.
A P anchor for a main tower cross beam of a cable-stayed bridge is characterized by comprising the following steps:
step (1): determining the positions of the P anchor plate 1 and the restraint ring 4 according to the design coordinates of the beam prestressed tendon, and accurately fixing the positions on the positioning tendon to ensure that the centroids of the P anchor plate 1 and the restraint ring 4 are on the same straight line;
step (2): sleeving the extrusion anchor 2 on one side of the prestressed tendon by using an extruder;
and (3): respectively and symmetrically penetrating prestressed tendons sleeved with the extrusion anchors 2 through the left side and the right side of the P anchor plate 1 according to design requirements, penetrating corrugated pipes 7 arranged at two sides of a restraint ring 4 through the restraint ring 4, and placing the prestressed tendons at two sides of a cross beam;
and (4): sealing the gap at the joint of the restraining ring 4 and the corrugated pipe 7 by using an adhesive tape, and filling the gap between the restraining ring 4 and the prestressed tendon by using a sealant;
and (5): pouring the beam concrete, and checking the restraining ring 4 and the gap at the joint of the restraining ring 4 and the corrugated pipe 7 to prevent the concrete from entering the corrugated pipe 7;
and (6): and (5) stretching the beam prestressed tendons in a grading manner when the concrete reaches the corresponding design strength.
The utility model has the following beneficial effects:
1. in the utility model, the P anchor plate and the extrusion anchor are arranged on one side of the anchoring end of the anchor, so that the section centroids of the prestressed tendons of the cross beam are always on the same straight line in the asynchronous tensioning process, and the force transmission effect is improved.
2. The utility model solves the adverse effect on the cross beam of the cable-stayed bridge caused by the fact that the prestressed tendon cannot be synchronously tensioned at two ends due to the restriction of the embedded part.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the P anchor plate structure of the present invention;
FIG. 3 is a schematic diagram of the P anchor structure of the present invention.
Shown in the figure: p anchor plate 1, extrusion anchor 2, steel strand 3, restraint circle 4, connecting sleeve 5, screw thread steel wire cover 6, bellows 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example 1
The utility model provides a P anchor for cable-stay bridge king-tower crossbeam which characterized in that: including P anchor slab 1, extrusion anchor 2, steel strand wires 3 and restraint circle 4, P anchor slab 1 is the anchor end, the one end cover of steel strand wires 3 is equipped with extrusion anchor 2, round hole on P anchor slab 1 is passed to steel strand wires 3 from P anchor slab 1 just, reverse side symmetry respectively, the one end of steel strand wires 3 is fixed in anchor end one side with extrusion anchor 2 and P anchor slab 1, the other end of steel strand wires 3 passes restraint circle 4 respectively and wears out from bellows 7 in the crossbeam and arrange in the crossbeam both sides, the other end of steel strand wires 3 is for stretching the end.
Preferably, 44 round holes 101 are symmetrically arranged on the P anchor plate 1, are symmetrically arranged in a diamond shape, and are accurately fixed on the positioning steel bars inside the cross beam.
Preferably, the aperture of the circular hole 101 is 1 cm.
Preferably, the extruded anchor 2 comprises a connecting sleeve 5 and a threaded steel wire sheath 6 arranged inside the connecting sleeve 5.
Preferably, the restraining ring 4 is a circular sleeve, and is precisely fixed on the beam positioning steel bars on two sides of the P anchor plate 1.
Preferably, the distance between the P anchor plate 1 and the restraining rings 4 on the two sides of the P anchor plate is 70 cm.
Preferably, the confinement rings 4 have a diameter of 14 cm.
A P anchor for a main tower cross beam of a cable-stayed bridge is characterized by comprising the following steps:
step (1): determining the positions of the P anchor plate 1 and the restraint ring 4 according to the design coordinates of the beam prestressed tendon, and accurately fixing the positions on the positioning tendon to ensure that the centroids of the P anchor plate 1 and the restraint ring 4 are on the same straight line;
step (2): sleeving the extrusion anchor 2 on one side of the prestressed tendon by using an extruder;
and (3): respectively and symmetrically penetrating prestressed tendons sleeved with the extrusion anchors 2 through the left side and the right side of the P anchor plate 1 according to design requirements, penetrating corrugated pipes 7 arranged at two sides of a restraint ring 4 through the restraint ring 4, and placing the prestressed tendons at two sides of a cross beam;
and (4): sealing the gap at the joint of the restraining ring 4 and the corrugated pipe 7 by using an adhesive tape, and filling the gap between the restraining ring 4 and the prestressed tendon by using a sealant;
and (5): pouring the beam concrete, and checking the restraining ring 4 and the gap at the joint of the restraining ring 4 and the corrugated pipe 7 to prevent the concrete from entering the corrugated pipe 7;
and (6): and (5) stretching the beam prestressed tendons in a grading manner when the concrete reaches the corresponding design strength.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a P anchor for cable-stay bridge king-tower crossbeam which characterized in that: including P anchor slab (1), extrusion anchor (2), steel strand wires (3) and restraint circle (4), P anchor slab (1) is the anchor end, the one end cover of steel strand wires (3) is equipped with extrusion anchor (2), round hole on P anchor slab (1) is passed to steel strand wires (3) symmetry respectively from just, the reverse side of P anchor slab (1), the one end of steel strand wires (3) is fixed in anchor end one side with extrusion anchor (2) and P anchor slab (1), the other end of steel strand wires (3) passes restraint circle (4) respectively and wears out from bellows (7) in the crossbeam and arranges the crossbeam both sides in, the other end of steel strand wires (3) is for stretching out the end.
2. The P anchor for the main tower beam of the cable-stayed bridge according to claim 1, characterized in that: the P anchor plate (1) is symmetrically provided with 44 round holes (101) which are arranged in a rhombic symmetrical mode and accurately fixed on the positioning steel bars inside the cross beam.
3. The P anchor for the main tower beam of the cable-stayed bridge according to claim 1, characterized in that: the aperture of the round hole (101) is 1 cm.
4. The P anchor for the main tower beam of the cable-stayed bridge according to claim 1, characterized in that: the extrusion anchor (2) comprises a connecting sleeve (5) and a threaded steel wire sleeve (6) arranged in the connecting sleeve (5).
5. The P anchor for the main tower beam of the cable-stayed bridge according to claim 1, characterized in that: the restraint ring (4) is a circular sleeve and is accurately fixed on the cross beam positioning steel bars on two sides of the P anchor plate (1).
6. The P anchor for the main tower beam of the cable-stayed bridge according to claim 1, characterized in that: the distance between the P anchor plate (1) and the restraint rings (4) on the two sides of the P anchor plate is 70 cm.
7. The P anchor for the main tower beam of the cable-stayed bridge according to claim 1, characterized in that: the diameter of the restraint ring (4) is 14 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122803010.7U CN216275229U (en) | 2021-11-16 | 2021-11-16 | P anchor for main tower cross beam of cable-stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122803010.7U CN216275229U (en) | 2021-11-16 | 2021-11-16 | P anchor for main tower cross beam of cable-stayed bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216275229U true CN216275229U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122803010.7U Active CN216275229U (en) | 2021-11-16 | 2021-11-16 | P anchor for main tower cross beam of cable-stayed bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216275229U (en) |
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2021
- 2021-11-16 CN CN202122803010.7U patent/CN216275229U/en active Active
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