CN215629434U - Suspension casting box girder longitudinal prestressed tendon overall reeving sleeve assembly - Google Patents
Suspension casting box girder longitudinal prestressed tendon overall reeving sleeve assembly Download PDFInfo
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- CN215629434U CN215629434U CN202121790816.0U CN202121790816U CN215629434U CN 215629434 U CN215629434 U CN 215629434U CN 202121790816 U CN202121790816 U CN 202121790816U CN 215629434 U CN215629434 U CN 215629434U
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- steel strand
- sleeve
- box girder
- reeving
- wedged
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- 210000002435 tendon Anatomy 0.000 title claims abstract description 40
- 238000005266 casting Methods 0.000 title claims abstract description 22
- 239000000725 suspension Substances 0.000 title abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 125
- 239000010959 steel Substances 0.000 claims abstract description 125
- 230000000149 penetrating effect Effects 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 238000004873 anchoring Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a suspension casting box girder longitudinal prestressed tendon general reeving sleeve component, wherein the longitudinal prestressed tendon is a steel strand bundle; the general rope penetrating sleeve assembly of the longitudinal prestressed tendon of the cantilever casting box girder comprises a rope penetrating device and a protective pipe, wherein the protective pipe is sleeved outside the rope penetrating device, and the rope penetrating device comprises a wedged steel strand, a sleeve and a clamping piece; at least part of the wedging steel strand is arranged in the steel strand bundle; the sleeve is sleeved outside the steel strand bundle; the clamping piece is sleeved on the exposed part of the wedged steel strand, and the reeving device is configured to: when the clip is at least partially within the end face of the steel strand bundle, the steel strand bundle is in interference fit with the sleeve and is thereby secured by the sleeve. Through the mutual action of the wedged steel strands and the clamping pieces in the sleeve, a temporary anchoring system is formed, the overall fastening of the steel strand bundle is completed, and the steel strand bundle is convenient to pass through and pull.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a general cable penetrating sleeve assembly for a longitudinal prestressed tendon of a suspension casting box beam.
Background
The longitudinal prestressed tendons of the cantilever casting box girder play a role in overall connection of cantilever casting segments, and the conventional cable penetrating mode of the longitudinal prestressed tendons comprises a single traction mode, an overall cable penetrating mode and the like; when single traction is adopted, a reeving machine is usually adopted to reeve ropes one by one, and a certain risk is caused during implementation because steel strands can be wound in the corrugated pipe due to the single reeving machine and prestress damage is caused during tensioning; when the overall reeving is adopted (i.e. a plurality of steel strands are bundled in parallel to form a steel strand bundle), the front end of the steel strand bundle is generally welded into an overall, and then is connected with a traction system for overall reeving, or the front end of the steel strand bundle is upset and is connected with a protective cover for overall reeving, and the like; at present, the total reeving needs to cut off the partial steel strand at the front end of the steel strand, which causes waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a general cable penetrating sleeve assembly for a longitudinal prestressed tendon of a cantilever box girder, which is used for solving the problem of cable penetrating of the prestressed tendon.
In order to solve the technical problem, the utility model provides a general reeving sleeve assembly for a longitudinal prestressed tendon of a suspension casting box girder, wherein the longitudinal prestressed tendon is a steel strand bundle; the general rope penetrating sleeve assembly of the longitudinal prestressed tendon of the cantilever casting box girder comprises a rope penetrating device and a protective pipe, wherein the protective pipe is sleeved outside the rope penetrating device, and the rope penetrating device comprises a wedged steel strand, a sleeve and a clamping piece; at least part of the wedging steel strand is arranged in the steel strand bundle; the sleeve is sleeved outside the steel strand bundle; the clamping piece is sleeved on the exposed part of the wedging steel strand, and the reeving device is configured to: when the clip is at least partially within the end face of the steel strand bundle, the steel strand bundle is in interference fit with the sleeve and is thereby secured by the sleeve.
Optionally, in the general threading sleeve assembly for the longitudinal prestressed tendons of the cantilever-cast box girder, the inner diameter of one end, close to the exposed part of the wedged steel strands, of the sleeve is smaller than the inner diameter of one end, far away from the exposed part of the wedged steel strands, of the sleeve.
Optionally, in the suspension casting box girder longitudinal prestressed tendon general reeving sleeve assembly, a traction hole is formed in one side, close to the smaller inner diameter, of the sleeve.
Optionally, in the suspension casting box girder longitudinal prestressed tendon general reeving sleeve assembly, the number of the traction holes is two, and the two traction holes are radially and symmetrically arranged on the sleeve.
Optionally, in the suspension casting box girder longitudinal prestressed tendon general reeving sleeve assembly, an inner diameter of one end, close to the exposed portion of the wedged steel strand, of the sleeve is larger than a maximum value of a radial length of the clamping piece.
Optionally, in the overall reeving sleeve assembly for the longitudinal prestressed tendons of the cantilever casting box girder, the wedging steel strand is arranged at the axial center of the steel strand bundle.
Optionally, in the suspension casting box girder longitudinal prestressed tendon general reeving sleeve assembly, the protection pipe is a corrugated pipe.
The utility model provides a suspension casting box girder longitudinal prestressed tendon general reeving sleeve component, wherein the longitudinal prestressed tendon is a steel strand bundle; the general rope penetrating sleeve assembly of the longitudinal prestressed tendon of the cantilever casting box girder comprises a rope penetrating device and a protective pipe, wherein the protective pipe is sleeved outside the rope penetrating device, and the rope penetrating device comprises a wedged steel strand, a sleeve and a clamping piece; at least part of the wedging steel strand is arranged in the steel strand bundle; the sleeve is sleeved outside the steel strand bundle; the clamping piece is sleeved on the exposed part of the wedging steel strand, and the reeving device is configured to: when the clip is at least partially within the end face of the steel strand bundle, the steel strand bundle is in interference fit with the sleeve and is thereby secured by the sleeve. Through the mutual action of the wedged steel strands and the clamping pieces in the sleeve, a temporary anchoring system is formed, the overall fastening of the steel strand bundle is completed, and the steel strand bundle is convenient to pass through and pull.
Drawings
Fig. 1 is a schematic structural view of a general cable bushing assembly of a longitudinal tendon of a cantilever box girder provided in this embodiment;
FIG. 2 is a schematic cross-sectional view of a general cable bushing assembly for a longitudinal tendon of a cantilever box girder according to the embodiment;
wherein the reference numerals are as follows:
1-a sleeve; 2-a clamping piece; 3-a steel strand bundle; 4-wedging the steel strand; 5-a drawing hole; 6-protecting the tube.
Detailed Description
The general cable-passing sleeve assembly of the longitudinal prestressed tendon of the cantilever box girder provided by the utility model is further described in detail by combining the attached drawings and specific embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
It is noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment provides a general threading sleeve assembly for a longitudinal prestressed tendon of a cantilever box girder, and as shown in fig. 1-2, the general threading sleeve assembly for the longitudinal prestressed tendon of the cantilever box girder is a steel strand bundle 3; the suspension casting box girder longitudinal prestressed tendon overall reeving sleeve component comprises a reeving device and a protective pipe 6, wherein the protective pipe 6 is sleeved outside the reeving device, and the reeving device comprises a wedged steel strand 4, a sleeve 1 and a clamping piece 2; the wedging steel strand 4 is at least partially arranged in the steel strand bundle 3; the sleeve 1 is sleeved outside the steel strand bundle 3; the clamping piece 2 is sleeved on the exposed part of the wedged steel strand 4, and the reeving device is configured to: when the clip 2 is at least partially located within the end face of the steel strand bundle 3, the steel strand bundle 3 is in interference fit with the sleeve 1 and is thereby secured by the sleeve 1.
The suspension casting box girder longitudinal prestressed tendon overall reeving sleeve component provided by the embodiment forms a temporary anchoring system through the interaction of wedging steel strands and clamping pieces in the sleeve, completes the overall fastening of a steel strand bundle and facilitates the reeving traction of the steel strand bundle.
It should be noted that the present application protects the general tendon-threading sleeve assembly for the suspended cast box girder, and does not include the steel strand bundle 3 mentioned herein, and therefore, the present application is not limited to the use environment in which only the steel strand bundle 3 is used.
In the specific application process, after the sleeve 1 is transported to a construction site, the wedged steel stranded wires 4 are inserted into the end parts of the steel stranded wire bundles 3 with cables arranged, after the wedged steel stranded wires 4 are inserted, one ends of the wedged steel stranded wires 4 extend out of the end surfaces of the steel stranded wire bundles 3 for a certain distance, the ends of the steel stranded wire bundles 3 are arranged into a circle and are inserted into the special sleeve 1 (matched with the steel stranded wire bundles 3), then the clamping pieces 2 are sleeved on the wedged steel stranded wires 4, when the clamping pieces 2 extend into a plane where the end surfaces of the steel stranded wires 3 are located (namely when the clamping pieces 2 are at least partially located in the end surfaces of the steel stranded wires 3, the steel stranded wires 3 and the sleeve 1 are in interference fit), a temporary anchoring system is formed through the interaction of the wedged steel stranded wires 4 and the clamping pieces 2 in the sleeve 1, the overall fastening of the steel stranded wires 3 is completed, and the steel stranded wires 3 are convenient to pass through and pull.
In order to obtain the best traction effect and the highest fastening strength, in the present embodiment, the wedge-caulking strand 4 is disposed at the center of the strand bundle 3 in the axial direction.
Further, in order to better draw the fastened steel strand bundle 3 and ensure that the inner wall of the protective tube 6 is damaged during the drawing process of the steel strand bundle 3, in this embodiment, the inner diameter of the sleeve 1 near the exposed part of the wedged steel strands 4 is smaller than the inner diameter of the sleeve 1 far from the exposed part of the wedged steel strands 4. At this time, a relatively smooth chamfer is formed on the outer surface of the sleeve 1, so that the inner surface of the protective tube 6 is not damaged by the direct contact of the steel strand bundle 3 with respect to the end surface of the sleeve 1 in the traction process of the protective tube 6.
To facilitate traction of the traction system, in the present embodiment, the sleeve 1 is provided with a traction hole 5 near the side with the smaller inner diameter, as shown in fig. 1. The number of the drawing holes 5 may be one or more. When the number of the drawing holes 5 is one, the drawing holes 5 may be provided at any position of the drawing portion, but in order to have a good drawing effect, the drawing holes 5 are located as close to the smaller diameter side of the sleeve 1 as possible. When the number of the drawing holes 5 is two, the drawing holes can be radially and symmetrically arranged on the sleeve 1 for better drawing effect. By analogy, when the number of the traction holes 5 is more than two, the traction holes can be randomly arranged on the sleeve 1 according to the traction purpose.
In order to facilitate the installation of the sleeve 1 assembly, in this embodiment, as shown in fig. 1, the inner diameter of one end of the sleeve 1 near the exposed portion of the wedging steel strand 4 is larger than the maximum value of the radial length of the clamping piece 2. At the moment, other complex installation modes can be avoided, the sleeve 1 can be installed firstly, the installation clamping piece 2 is sleeved on the smaller caliber side of the sleeve 1 and slides to the end face of the steel strand bundle 3 along the axial direction of the wedged steel strand 4, and when one end of the clamping piece 2 extends into the end face of the steel strand bundle 3, the clamping piece 2 and the sleeve 1 are fastened to the steel strand bundle 3 in an interaction mode.
In the present embodiment, the protection tube 6 is a corrugated tube. The bellows is often used in the construction process of the cantilever beam section, but in this application, not only is not restricted to the bellows, can also use other pipelines to establish by the cover. The corrugated pipe can provide a cable penetrating channel for the steel strand 3 in the process of casting the cantilever beam section, and provides a protection effect for the steel strand 3.
When the suspension casting box girder longitudinal prestressed tendon overall reeving sleeve assembly is installed, the wedged steel strands 4 are firstly inserted into the steel strand bundle 3, and when the wedged steel strands 4 are inserted, the wedged steel strands 4 extend out of the end face of the steel strand bundle 3 for a certain distance. After the steel strand bundle 3 and the wedged steel strands 4 are inserted into a matched sleeve 1 (the inner diameter of the sleeve 1 is slightly larger than the steel strand bundle 3 inserted into the wedged steel strands 4) in a bundled mode, then the clamping pieces 2 are sleeved on the wedged steel strands 4 and slide to the end faces of the steel strand bundle 3 along the axial direction of the wedged steel strands 4, the clamping pieces 2 continue to slide, when at least part of the clamping pieces 2 are located in the end faces of the steel strand bundle 3, the steel strand bundle 3 is in interference fit with the sleeve 1, at the moment, fastening of the steel strand bundle 3 is completed, and finally, after the steel wire rope is connected and pulled to a traction system through the traction hole 5, the steel strand bundle 3 can be pulled to penetrate into the protective pipe 6. Specifically, after the clamping piece 2 and the wedged steel strand 4 are fixed, the wedged steel strand 4 is pulled back (the wedged steel strand 4 is pulled in the direction opposite to the direction in which the steel strand bundle 3 is inserted into the sleeve 1), so that the clamping piece 2 is wedged into the steel strand bundle 3, and the interference fit between the steel strand bundle 3 and the sleeve 1 is realized.
In summary, according to the overall threading sleeve assembly for the longitudinal prestressed tendons of the cantilever box girder provided by the embodiment, the longitudinal prestressed tendons are steel strand bundles 3; the suspension casting box girder longitudinal prestressed tendon overall reeving sleeve component comprises a reeving device and a protective pipe 6, wherein the protective pipe 6 is sleeved outside the reeving device, and the reeving device comprises a wedged steel strand 4, a sleeve 1 and a clamping piece 2; the wedging steel strand 4 is at least partially arranged in the steel strand bundle 3; the sleeve 1 is arranged outside the steel strand bundle 3; the clamping piece 2 is sleeved on the exposed part of the wedged steel strand 4 and is coated by the steel strand bundle 3, and the reeving device is configured to: when the clip 2 is at least partially located within the end face of the steel strand bundle 3, the steel strand bundle 3 is in interference fit with the sleeve 1 and is thereby secured by the sleeve 1.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (7)
1. The overall reeving sleeve assembly for the longitudinal prestressed tendons of the cantilever cast box girder is characterized in that the longitudinal prestressed tendons are steel strand bundles; the general rope penetrating sleeve assembly of the longitudinal prestressed tendon of the cantilever casting box girder comprises a rope penetrating device and a protective pipe, wherein the protective pipe is sleeved outside the rope penetrating device, and the rope penetrating device comprises a wedged steel strand, a sleeve and a clamping piece; at least part of the wedging steel strand is arranged in the steel strand bundle; the sleeve is sleeved outside the steel strand bundle; the clamping piece is sleeved on the exposed part of the wedging steel strand, and the reeving device is configured to: when the clip is at least partially within the steel strand bundle, the steel strand bundle is in an interference fit with the sleeve, thereby being secured by the sleeve.
2. The precast box girder segment tendon total reeving sleeve assembly of claim 1 wherein the sleeve has an inner diameter proximate to the exposed portion of the wedged strands that is smaller than an inner diameter distal to the exposed portion of the wedged strands.
3. The precast box girder segment rigging sleeve assembly according to claim 2, wherein the sleeve is provided with a pulling hole near the side with the smaller inner diameter.
4. The cantilever box girder total tendon threading sleeve assembly of claim 3, wherein the number of the pulling holes is two, and the two pulling holes are radially and symmetrically arranged on the sleeve.
5. The precast box girder segment tendon total reeving sleeve assembly of claim 1 wherein the sleeve has an inner diameter proximate to the exposed portion of the wedged strands that is greater than the maximum radial length of the clip.
6. The suspended cast box girder total tendon passing sleeve assembly as claimed in any one of claims 1 to 5, wherein the wedged steel strand is disposed at an axial center position of the steel strand bundle.
7. The precast box girder segment rigging sleeve assembly according to claim 1, wherein the protective tube is a corrugated tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121790816.0U CN215629434U (en) | 2021-08-03 | 2021-08-03 | Suspension casting box girder longitudinal prestressed tendon overall reeving sleeve assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121790816.0U CN215629434U (en) | 2021-08-03 | 2021-08-03 | Suspension casting box girder longitudinal prestressed tendon overall reeving sleeve assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215629434U true CN215629434U (en) | 2022-01-25 |
Family
ID=79894489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121790816.0U Active CN215629434U (en) | 2021-08-03 | 2021-08-03 | Suspension casting box girder longitudinal prestressed tendon overall reeving sleeve assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215629434U (en) |
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2021
- 2021-08-03 CN CN202121790816.0U patent/CN215629434U/en active Active
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