CN216379199U - Be used for reinforced (rfd) external cable of bridge to turn to device - Google Patents
Be used for reinforced (rfd) external cable of bridge to turn to device Download PDFInfo
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- CN216379199U CN216379199U CN202122374553.1U CN202122374553U CN216379199U CN 216379199 U CN216379199 U CN 216379199U CN 202122374553 U CN202122374553 U CN 202122374553U CN 216379199 U CN216379199 U CN 216379199U
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- steel sleeve
- plastic pipe
- external cable
- lining plastic
- steering device
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Abstract
The utility model provides an external cable steering device for bridge reinforcement, which is arranged in a box girder; the steering device comprises a steel sleeve and a lining plastic pipe; the lining plastic pipe is arranged in the steel sleeve, a certain gap is formed between the lining plastic pipe and the steel sleeve, and a rubber layer is filled in the gap; the diameters of the steel sleeve and the lining plastic pipe are gradually increased from the middle to the two ends. According to the utility model, by designing the steel sleeve with the radian, the steering angle and the radian of the external cable can be provided according to the design requirement, so that pre-bending can be carried out, and smooth transition of the steel cable can be ensured; the lining plastic pipe is designed in the steel sleeve, so that the effect of isolation is achieved, and the failure of the anticorrosion function caused by the direct friction between the steel strand and the steel sleeve is prevented.
Description
Technical Field
The utility model relates to the technical field of bridge reinforcement, in particular to an external cable steering device for bridge reinforcement.
Background
With the continuous development of highway traffic industry in China, the construction scale and the construction quantity of bridges are continuously increased. In the construction process of bridge engineering, the steel-concrete composite beam is often used as a overpass bridge in engineering projects, and the application of the prestress external cable technology to the steel-concrete composite beam can obviously improve the bearing capacity of the bridge, obviously improve the stress performance of the bridge structure and simultaneously improve the safety and comfort level of vehicle passing.
The prestressed external cable is used for reinforcing the upper part of the bridge, namely, in a tension area of the lower part of the beam, cold-drawn coarse steel bars, steel strands or high-strength steel wire bundles are used as prestressed ribs, the prestressed ribs are tensioned to generate eccentric prestress on the beam body, under the action of the eccentric prestress, the beam body is arched, the deflection load is reduced, the stress condition of the beam body is improved, and the purpose of improving the bearing capacity of the beam is achieved. The prestressed external cable reinforcing technology is an excellent reinforcing and improving technology at present.
The prestressed external cable reinforcing technology has a technical problem that: the steering problem of the external cable. The beam span of a common box girder continuous beam bridge in China is very long, and the external cables need to be turned in the box girder for many times so as to achieve the purpose of reducing load without damaging the box girder. The existing steering technology of the external cable mainly takes a fixed pull hoop and a positioning pin as main parts, and the relative position of the steering position of the external cable is fixed by the steering of the method, so that the external cable cannot adapt to the deformation problem caused by temperature change and the like, and the external cable body and the box girder are damaged.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides an external cable steering device for bridge reinforcement, which is arranged in a box girder; the steering device comprises a steel sleeve and a lining plastic pipe; the lining plastic pipe is arranged in the steel sleeve, a certain gap is formed between the lining plastic pipe and the steel sleeve, and a rubber layer is filled in the gap; the diameters of the steel sleeve and the lining plastic pipe are gradually increased from the middle to the two ends.
Preferably, a rib plate group is arranged on the outer side of the end part of the steel sleeve and comprises a plurality of reinforcing ribs uniformly arranged around the circumference of the steel sleeve; the end part of the steel sleeve is fixed on the diaphragm of the box girder through the rib plate group.
Preferably, the reinforcing rib is in a right-angle triangle shape, one right-angle side of the reinforcing rib is fixedly connected with the outer side of the steel sleeve, and the other right-angle side of the reinforcing rib is fixedly connected with the diaphragm.
Preferably, the diaphragm plate is provided with a through hole for the steel sleeve to pass through, and the diameter of the through hole is 0.8-1.2 cm larger than the outer diameter of the steel sleeve.
Preferably, the end of the plastic-lined pipe protrudes beyond the end of the steel sleeve.
Preferably, the rubber layer is formed by filling a plurality of rubber strips, the thickness range of the rubber strips is 19-21 mm, and the width range of the rubber strips is 39-41 mm.
Compared with the prior art, the method has the following beneficial effects:
1. the steel sleeve of the steering device is designed into an arc shape with a gradually increasing trend from the middle part to the two ends, and the steel sleeve is used for providing the steering angle and the radian of the external cable required by design so as to be pre-bent and ensure smooth transition of the steel cable.
2. The lining plastic pipe mainly plays an isolation role, and the corrosion prevention function failure caused by the direct friction between the steel strand and the steel sleeve is prevented.
3. The steel sleeve is fixed on the diaphragm plate through a plurality of reinforcing ribs, so that the stable stress during the stretching of the steel cable and the later use safety can be ensured.
4. The diameter of the perforation is slightly larger than the outer diameter of the steel sleeve, so that the installation accuracy can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
FIG. 1 is a schematic end view of a steering apparatus according to the present invention;
FIG. 2 is a schematic view showing an external structure of a steering apparatus according to the present invention;
fig. 3 is a schematic view showing a steering apparatus according to the present invention when it is mounted on a diaphragm.
Reference numerals:
1-steel casing pipe; 2-lining a plastic pipe;
3-rib plate group, 31-reinforcing rib;
4-diaphragm plate.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Example (b): as shown in fig. 1 to 3, the present invention discloses an external cable steering device for bridge reinforcement, which is installed in a box girder; the steering device comprises a steel sleeve 1 and a lining plastic pipe 2. The lining plastic pipe 2 is installed in the steel sleeve 1, and a certain gap is formed between the lining plastic pipe 2 and the steel sleeve 1, and a rubber layer (not shown) is filled in the gap. The diameters of the steel sleeve 1 and the lining plastic pipe 2 are gradually increased from the middle to the two ends.
Therefore, the steel sleeve has the function of providing the steering angle and radian of the external cable according to the design requirement for pre-bending, and can ensure smooth transition of the steel cable. The lining plastic pipe mainly plays an isolation role, and the corrosion prevention function failure caused by the direct friction between the steel strand and the steel sleeve is prevented.
In practice, the plastic-lined pipe 2 may be a member made of hot-extruded HDPE, but is not limited thereto and may be adjusted according to the actual situation.
In the implementation, the upper side of the lining plastic pipe 2 is connected with the upper side of the inner cavity of the steel sleeve 1.
Specifically, a rib plate group 3 is arranged on the outer side of the end part of the steel sleeve 1, and the rib plate group 3 comprises a plurality of reinforcing ribs 31 which are uniformly arranged around the circumference of the steel sleeve 1. The end part of the steel sleeve 1 is fixed on a diaphragm 4 of the box girder through the ribbed plate group 3. In the implementation process, the welding angle of the steel sleeve 1 and the diaphragm plate 4 is consistent with the design linearity of the steel cable.
Therefore, the steel sleeve is fixed on the diaphragm plate through the reinforcing ribs, and the stable stress during the stretching of the steel cable and the use safety in the later period can be ensured.
Specifically, the reinforcing rib 31 is in a right triangle shape, a right-angle side of the reinforcing rib 31 is fixedly connected with the outer side of the steel sleeve 1, and the other right-angle side of the reinforcing rib 31 is fixedly connected with the diaphragm 4. In practice, the number of the reinforcing ribs 31 is four, two of the reinforcing ribs 31 are arranged on the upper side of the steel sleeve 1, and the other two reinforcing ribs 31 are arranged on the lower side of the steel sleeve 1. Wherein, the included angle between two reinforcing ribs 31 positioned on the upper side of the steel sleeve 1 is 60 degrees, the included angle between two reinforcing ribs 31 positioned on the lower side of the steel sleeve 1 is 60 degrees, and the included angle between two adjacent reinforcing ribs 31 is 120 degrees.
Specifically, the diaphragm plate 4 is provided with a through hole for the steel sleeve 1 to pass through, and the diameter of the through hole is 0.8-1.2 cm larger than the outer diameter of the steel sleeve 1.
Specifically, the end of the lining plastic pipe 2 protrudes out of the end of the steel casing 1.
Specifically, the rubber layer is formed by filling a plurality of rubber strips, the thickness range of the rubber strips is 19-21 mm, and the width range of the rubber strips is 39-41 mm. When the method is implemented, sundries between the lining plastic pipe 2 and the steel sleeve 1 are cleaned, and then a gap between the lining plastic pipe 2 and the steel sleeve 1 is filled up by using a rubber strip. Therefore, cement paste or other impurities in the steering gear can be prevented from entering, the external cable can smoothly pass through the pore channel, and the cable body cannot be damaged.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention is described in detail with reference to the following embodiments, it should be understood by those skilled in the art that: the technical solutions described in the following embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (6)
1. The utility model provides a be used for reinforced (rfd) external cable of bridge to turn to device which characterized in that: the steering device is arranged in the box girder; the steering device comprises a steel sleeve and a lining plastic pipe; the lining plastic pipe is arranged in the steel sleeve, a certain gap is formed between the lining plastic pipe and the steel sleeve, and a rubber layer is filled in the gap; the diameters of the steel sleeve and the lining plastic pipe are gradually increased from the middle to the two ends.
2. The external cable steering device for bridge reinforcement of claim 1, wherein: a rib plate group is arranged on the outer side of the end part of the steel sleeve and comprises a plurality of reinforcing ribs arranged around the circumference of the steel sleeve; the end part of the steel sleeve is fixed on the diaphragm of the box girder through the rib plate group.
3. The external cable steering device for bridge reinforcement of claim 2, wherein: the reinforcing rib is in a right-angle triangle shape, one right-angle side of the reinforcing rib is fixedly connected with the outer side of the steel sleeve, and the other right-angle side of the reinforcing rib is fixedly connected with the diaphragm.
4. The external cable steering device for bridge reinforcement of claim 2, wherein: the diaphragm plate is provided with a through hole for the steel sleeve to pass through, and the diameter of the through hole is 0.8-1.2 cm larger than the outer diameter of the steel sleeve.
5. The external cable steering device for bridge reinforcement of claim 1, wherein: the end part of the lining plastic pipe extends out of the end part of the steel sleeve.
6. The external cable steering device for bridge reinforcement of claim 1, wherein: the rubber layer is formed by filling a plurality of rubber strips, the thickness range of the rubber strips is 19-21 mm, and the width range of the rubber strips is 39-41 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122374553.1U CN216379199U (en) | 2021-09-28 | 2021-09-28 | Be used for reinforced (rfd) external cable of bridge to turn to device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122374553.1U CN216379199U (en) | 2021-09-28 | 2021-09-28 | Be used for reinforced (rfd) external cable of bridge to turn to device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216379199U true CN216379199U (en) | 2022-04-26 |
Family
ID=81243488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122374553.1U Active CN216379199U (en) | 2021-09-28 | 2021-09-28 | Be used for reinforced (rfd) external cable of bridge to turn to device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216379199U (en) |
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2021
- 2021-09-28 CN CN202122374553.1U patent/CN216379199U/en active Active
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