CN220643885U - Stay cable second tensioning and subsequent tensioning construction platform device on beam - Google Patents
Stay cable second tensioning and subsequent tensioning construction platform device on beam Download PDFInfo
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- CN220643885U CN220643885U CN202322200040.8U CN202322200040U CN220643885U CN 220643885 U CN220643885 U CN 220643885U CN 202322200040 U CN202322200040 U CN 202322200040U CN 220643885 U CN220643885 U CN 220643885U
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- stay cable
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- 238000010276 construction Methods 0.000 title claims abstract description 84
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 241000282326 Felis catus Species 0.000 claims description 7
- 230000009194 climbing Effects 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses a second tensioning and subsequent tensioning construction platform device for stay cables on a beam. The construction platform comprises an upper frame body, a lower frame body and a vertical frame body, wherein the vertical frame body is connected between the outer side ends of the upper frame body and the lower frame body, a movable wheel set is arranged at the lower part of the inner side end of the upper frame body, a scaffold board is paved on the lower frame body, the construction platform is movably matched with the running track through the movable wheel set, the lower frame body of the construction platform is located below a stay cable anchor hole of the concrete box girder, the construction platform fixing device comprises a finish rolling screw thread steel and a chain block, the finish rolling screw thread steel is vertically fixed on the concrete box girder, the construction platform is connected with the finish rolling screw thread steel through the chain block, and the construction platform is bound with the running track through steel strands.
Description
Technical Field
The utility model relates to a second tensioning and subsequent tensioning construction platform device for stay cables on a beam, and relates to the technical field of bridge construction.
Background
The stay cable tensioning construction of the cable-stayed bridge is generally carried out for more than two times, the first time is pre-tensioning, certain pre-compression stress and corresponding deformation are provided for concrete, and in order to achieve the bridge forming force and the bridge forming line shape, the concrete cable-stayed bridge is usually subjected to secondary tensioning and secondary tensioning subsequent tensioning. In order to ensure the designed bridge forming cable force and bridge forming line shape, the accuracy control requirement on the cable force value is extremely high, and the cable force value error of the cable-stayed bridge with double cable faces, which is required to be the same with the cable number at two sides, is very small, and is generally 1%. In addition, stay cable tensioning operation is generally overhead operation, and safety during operation needs to be improved; the construction period of the general bridge engineering is short, and the construction progress needs to be quickened.
Based on the technical problems, the application provides a novel stay cable second tensioning and subsequent tensioning construction platform.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a second tensioning and subsequent tensioning construction platform device for the stay cable on the beam, which is convenient for accurately controlling the cable force of the concrete cable-stayed bridge, has convenient construction, high efficiency and high construction safety.
The utility model is realized by the following technical scheme: a stay cable second tensioning and subsequent tensioning construction platform device on a beam is characterized in that: including stretch-draw construction platform, set up on the roof beam of concrete box girder perpendicular wall upper portion walk track, construction platform fixing device, stretch-draw construction platform includes upper portion support body, lower part support body, vertical support body, and vertical support body connects between the outside end of upper portion support body and lower part support body, and the inboard end lower part of upper portion support body is provided with the removal wheelset, lays the scaffold board on the lower part support body, and stretch-draw construction platform passes through the removal wheelset movably with walk the track cooperation, stretch-draw construction platform's lower part support body is located the stay cable anchor hole below of concrete box girder, construction platform fixing device includes finish rolling screw steel, chain block, the finish rolling screw steel is vertical to be fixed on the concrete box girder, stretch-draw construction platform passes through chain block with the finish rolling screw steel is connected, and stretch-draw construction platform binds through the steel strand wires between walk the track.
According to the utility model, the tensioning construction platform is connected to the concrete box girder through the chain block and the finish rolling screw steel, and the tensioning construction platform is bound with the running track through the steel strand, so that the stability of the construction platform during construction can be ensured. During tensioning operation, constructors can perform tensioning operation on the lower frame body of the construction platform, construction is convenient, and construction safety is high. After the construction is finished, the steel strand is released, the tensioning construction platform can move to the next operation position through the travelling rail, and then binding is carried out again, so that tensioning operation can be carried out.
Furthermore, in order to facilitate quick installation, the finish rolling deformed steel bars are inserted into pre-buried holes on the beams of the concrete box beam and fixed on the concrete box beam through nuts.
Further, in order to ensure safety, the running track is provided with a transverse limit of the running track.
Further, for the constructor construction of being convenient for, be provided with the cat ladder on the vertical support body. The cat ladder can also be used as a safety rope anchoring point to ensure the safety of operators.
Further, the upper frame body comprises a first rectangular frame formed by connecting two upper chords and two upper chord cross braces, a second rectangular frame formed by connecting two middle chord cross braces and two middle chords, four short vertical rods, wherein the first rectangular frame and the second rectangular frame are arranged up and down, the four short vertical rods are respectively connected between four corner ends of the first rectangular frame and the second rectangular frame, the lower frame body comprises two lower chords, the vertical frame body is two long vertical rods, the upper ends of the two long vertical rods are fixedly connected with the two ends of the upper frame body, the lower ends of the two long vertical rods are respectively fixedly connected with the two lower chords, an upper diagonal brace is fixedly connected between the upper frame body and the long vertical rods, a lower stiffening rib is connected between the lower frame body and the long vertical rods, and the climbing ladder is arranged between the two long vertical rods.
Furthermore, the stay cable second tensioning and subsequent tensioning construction platform devices are symmetrically arranged on two sides of the concrete box girder. The second tensioning and subsequent tensioning construction platform devices are symmetrically arranged through the stay cables, and the stay cables on two sides can synchronously carry out tensioning construction, so that errors can be reduced.
The beneficial effects of the utility model are as follows: the utility model is stable and reliable, convenient for construction, convenient for tensioning operation, convenient for accurately controlling the cable tension of the concrete cable-stayed bridge and high in construction safety. The utility model reasonably utilizes the box girder structure, lays the travelling rail at the vertical wall position, and utilizes the embedded holes on the girder surface, the existing chain block, finish rolling screw steel and the like, thereby realizing quick installation, being simple and convenient to install, being capable of quickly moving, having high construction efficiency and saving construction period. The utility model has simple structure, easy material acquisition and convenient manufacture.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a side view schematic of FIG. 1;
in the figure, 1, a tensioning construction platform, 2, an upper chord, 3, an upper chord cross brace, 4, a short upright, 5, a middle chord cross brace, 6, a middle chord, 7, an upper diagonal brace, 8, a moving wheel set, 9, a running track, 10, a running track transverse limit, 11, a steel strand, 12, a hoop, 13, a long upright, 14, a cat ladder, 15, a lower stiffening rib, 16, a lower chord, 17, a scaffold board, 18, finish rolling screw thread steel, 19, a chain block, 20, a pre-buried hole on a beam, 21, a nut, 22, a concrete box beam, 23, a beam upper upright wall, 24 and a stay cable anchor hole.
Detailed Description
The utility model is further illustrated by the following non-limiting examples, in conjunction with the accompanying drawings:
as shown in the attached drawing, the stay cable second tensioning and subsequent tensioning construction platform device on the beam comprises a tensioning construction platform 1, a travelling rail 9 and a construction platform fixing device. In order to make the two sides synchronously stretch-draw construction, stretch-draw construction platform devices are symmetrically arranged on the two sides of the concrete box girder 22.
The running track 9 is arranged on the upper part of a beam upper vertical wall 23 of the concrete box beam 22, and the running track 9 is provided with a transverse limit 10 for limiting the tensioning construction platform. The running rail 9 and the running rail transverse limit 10 are anchored on the beam vertical wall 23 through bolts.
The tensioning construction platform 1 comprises an upper frame body, a lower frame body and a vertical frame body. The vertical support body is connected between the outside end of upper portion support body and lower part support body, and the inboard end lower part of upper portion support body is provided with and removes wheelset 8. The lower frame body is paved with a scaffold board 17. The tensioning construction platform 1 is movably matched with the running track 9 through the moving wheel sets 8, and the lower frame body of the tensioning construction platform 1 is positioned below the stay cable anchor holes 24 of the concrete box girder 22. In this embodiment, the upper frame body includes a first rectangular frame formed by welding two upper chords 2 and two upper chord cross braces 3, a second rectangular frame formed by welding two middle chord cross braces 5 and two middle chords 6, four short upright rods 4, the upper chords 2, the upper chord cross braces 3, the middle chord cross braces 5, the middle chords 6 and the short upright rods 4 are all I-steel or channel steel, the first rectangular frame and the second rectangular frame are arranged up and down, and the four short upright rods 4 are respectively welded and connected between four corner ends of the first rectangular frame and the second rectangular frame. The lower frame body comprises two lower chords 16, the vertical frame body is provided with two long vertical rods 13, the upper ends of the two long vertical rods 13 are welded with the two ends of the upper frame body, and the lower ends of the two long vertical rods 13 are respectively welded with the two lower chords 16. An upper diagonal brace 7 is welded between the upper frame body and the long vertical rod 13, a lower stiffening rib 15 is welded between the lower frame body and the long vertical rod 13, and the upper diagonal brace 7 and the lower stiffening rib 15 can strengthen weak stress parts of chords, so that the stability of the tensioning construction platform is improved. A cat ladder 14 is arranged between the two long vertical rods 13, the cat ladder 14 is convenient for constructors to operate, and meanwhile, the cat ladder can be used as a safety rope anchoring point to ensure the safety of the constructors.
The construction platform fixing device comprises a finish rolling screw thread steel 18, a chain block 19 and a steel strand 11, wherein the finish rolling screw thread steel 18 is vertically fixed on a concrete box girder 22, and for convenience of construction, the finish rolling screw thread steel 18 is preferably inserted into a pre-buried hole 20 on the concrete box girder 22 and is fixed on the concrete box girder 22 through a screw cap 21. The tensioning construction platform 1 is connected with the finish rolling threaded steel 18 through the chain block 19, so that anchoring of the tensioning construction platform is realized, and meanwhile, the tensioning construction platform 1 and the running track 9 are bound through the steel strands 11 and the anchor clamps 12, so that stability of the tensioning construction platform is ensured.
When the construction method is used, after the tensioning construction platform is installed in place and bound through the steel strands, constructors can carry out tensioning operation on the scaffold board on the lower frame body of the construction platform, and the construction is convenient. In the construction process, the safety rope of constructors can be connected to the crawling ladder, so that the construction safety is guaranteed. After the tensioning construction is finished, after the steel strands 11 are released, the tensioning construction platform 1 can move to the next operation position through the travelling rail 9, then binding is carried out again, tensioning operation can be continued, large hoisting equipment is not needed to move in the moving process of the tensioning construction platform, and the construction progress can be improved.
Other parts in this embodiment are all of the prior art, and are not described herein.
Claims (6)
1. A stay cable second tensioning and subsequent tensioning construction platform device on a beam is characterized in that: including stretch-draw construction platform (1), set up on the roof beam of concrete box roof beam walk the track (9) of going on vertical wall (23) upper portion, construction platform fixing device, stretch-draw construction platform (1) are including upper portion support body, lower part support body, vertical support body, and vertical support body connects between the outside end of upper portion support body and lower part support body, and the inboard end lower part of upper portion support body is provided with movable wheelset (8), lays the scaffold board on the lower part support body, stretch-draw construction platform (1) pass through movable wheelset (8) with walk the track (9) cooperation, the lower part support body of stretch-draw construction platform (1) is located the stay cable anchor hole (24) below of concrete box roof beam, construction platform fixing device includes finish rolling screw thread steel (18), chain block (19), the finish rolling screw thread steel (18) are vertical to be fixed on the concrete box roof beam, stretch-draw construction platform (1) pass through chain block (19) with finish rolling screw thread steel (18) are connected, stretch-draw construction platform (1) and walk the track (9) and bind through the strand wires.
2. The stay cable second and subsequent tensioning construction platform device on a beam of claim 1, wherein: the finish rolling deformed steel bars (18) are inserted into pre-buried holes (20) on the beam of the concrete box beam and are fixed on the concrete box beam through nuts (21).
3. The stay cable second and subsequent tensioning construction platform device on a beam of claim 1, wherein: the walking track (9) is provided with a walking track transverse limit (10).
4. A stay cable second tensioning and subsequent tensioning work platform device on a beam according to claim 1 or 2 or 3, wherein: and a cat ladder is arranged on the vertical frame body.
5. The stay cable second and subsequent tensioning construction platform device on a beam of claim 4, wherein: the upper frame body comprises a first rectangular frame formed by connecting two upper chord members (2) and two upper chord member cross braces (3), a second rectangular frame formed by connecting two middle chord member cross braces (5) and two middle chord members (6), four short upright rods (4), wherein the first rectangular frame and the second rectangular frame are arranged up and down, the four short upright rods (4) are respectively connected between the four corner ends of the first rectangular frame and the second rectangular frame, the lower frame body comprises two lower chord members (16), the vertical frame body is two long upright rods (13), the upper ends of the two long upright rods (13) are fixedly connected with the two ends of the upper frame body, the lower ends of the two long upright rods (13) are respectively fixedly connected with the two lower chord members (16), an upper diagonal bracing (7) is fixedly connected between the upper frame body and the long upright rods (13), a lower stiffening rib (15) is connected between the lower frame body and the long upright rods (13), and the climbing ladder is arranged between the two long upright rods (13).
6. A stay cable second tensioning and subsequent tensioning work platform device on a beam according to claim 1 or 2 or 3, wherein: the second tensioning and subsequent tensioning construction platform devices of the stay cables are symmetrically arranged on two sides of the concrete box girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322200040.8U CN220643885U (en) | 2023-08-16 | 2023-08-16 | Stay cable second tensioning and subsequent tensioning construction platform device on beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322200040.8U CN220643885U (en) | 2023-08-16 | 2023-08-16 | Stay cable second tensioning and subsequent tensioning construction platform device on beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220643885U true CN220643885U (en) | 2024-03-22 |
Family
ID=90262927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322200040.8U Active CN220643885U (en) | 2023-08-16 | 2023-08-16 | Stay cable second tensioning and subsequent tensioning construction platform device on beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220643885U (en) |
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2023
- 2023-08-16 CN CN202322200040.8U patent/CN220643885U/en active Active
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