CN210886923U - Maintenance system of straight pylon of double-cable-plane cable-stayed bridge - Google Patents
Maintenance system of straight pylon of double-cable-plane cable-stayed bridge Download PDFInfo
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- CN210886923U CN210886923U CN201921419679.2U CN201921419679U CN210886923U CN 210886923 U CN210886923 U CN 210886923U CN 201921419679 U CN201921419679 U CN 201921419679U CN 210886923 U CN210886923 U CN 210886923U
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- 238000012423 maintenance Methods 0.000 title claims description 39
- 239000000725 suspension Substances 0.000 claims description 24
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
A maintenance system for a straight pylon of a double-cable-plane cable-stayed bridge comprises a hanging point device, an anti-falling device and a suspension operation platform, wherein the hanging point device is fixed on a parapet at the top end of the straight pylon, the hanging point device comprises a fixed support, a movable support, a telescopic mechanism and a hanging rope, the hanging rope is hung at the end part of the movable support, the movable support penetrates through the fixed support, the fixed support is fixed on the parapet at the top of a tower, and the movable support adjusts the length of the hanging rope extending out of the pylon wall through the telescopic mechanism; the anti-falling device is fixed at the top end of the straight tower column; the suspension operation platform is connected with the tower top movable support through a lifting rope. The external hoisting point device at the top of the tower of the maintenance system has small volume, little influence on the arrangement of auxiliary facilities at the top of the tower and little maintenance workload; when the movable support of the hoisting point device is not used, the movable support can retract into the parapet wall at the top of the tower through the telescopic mechanism, so that the influence on the landscape of the bridge is small; the suspension operation platform can realize the full-section covering of the alignment tower column; when the maintenance operation is carried out, the influence on the bridge deck travelling crane is small due to small operation influence range.
Description
Technical Field
The utility model belongs to the technical field of the maintenance of bridge engineering and specifically relates to an overhaul system of straight pylon of two cable-plane cable-stayed bridge.
Background
The cable-stayed bridge is widely applied to the field of bridge engineering due to attractive appearance, reasonable stress and larger spanning capacity. The tower columns of the cable-stayed bridge are used as main bearing members to bear various bridge deck loads transmitted by stay cables, the tower columns need to be checked and maintained in the operation process of the bridge in order to eliminate potential safety hazards, and meanwhile, the cable-stayed bridge is clearly required to be provided with necessary maintenance facilities according to needs in the design process in the general standard of highway bridge design (JTG/T D60-2015) and the design rule of highway cable-stayed bridges (JTG/T D65-01-2007), so that the maintenance requirements in the operation process are met. In the traditional cable-stayed bridge design, because the requirements for maintenance and inspection are not recognized sufficiently, a tower column maintenance system is not installed on a considerable part of cable-stayed bridges, and sometimes even hot air balloons are required to be used for tower climbing operation when maintenance is needed; in addition, a part of cable-stayed bridges are only provided with maintenance platforms at a plurality of key maintenance positions of the tower column, so that the maintenance requirement on full coverage of the tower column cannot be met; in some newly-built cable-stayed bridges in recent years, a 360-degree rotatable crane is installed in the center of the top of a tower column, the length of a crane arm is telescopic, a hanging basket is hung at the end part of the crane arm, and the tower column is overhauled through the lifting of the hanging basket. The maintenance system has the problems of interference with accessory facilities such as a lightning rod navigation lamp on the top of a tower column, high outdoor maintenance cost, short service life, high manufacturing cost and the like. Therefore, it is necessary to develop a maintenance system, which needs to satisfy the requirements of light weight, convenient operation, reasonable cost, low later maintenance cost, capability of realizing tower position full-coverage maintenance, no influence from obstacles such as stay cables, and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a maintenance system of straight pylon of two cable-faced cable-stayed bridge can realize that the pylon position covers the maintenance entirely.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a maintenance system for the straight tower column of cable-stayed bridge with dual cable planes is composed of tower column, parapet wall on the top of tower column, stay cables on both sides, and maintenance system consisting of
The lifting point device is fixed on the parapet at the top end of the tower column and comprises a fixed support, a movable support, a telescopic mechanism and a lifting rope, the lifting rope is hung at the end part of the movable support, the movable support penetrates through the fixed support, the fixed support is fixed on the parapet at the top of the tower, and the telescopic mechanism is used for adjusting the length of the movable support extending out of the tower column;
the suspension operation platform is connected with the tower top movable support through a lifting rope;
the anti-falling device comprises a personnel safety rope with one end fixed at the top end of the tower column and a rope locking device placed in the suspension operation platform, and the rope locking device is used for locking a safety belt of an operator in the suspension operation platform with the personnel safety rope.
Furthermore, the suspension operating platform is of a truss structure formed by welding high-strength aluminum alloy and comprises two groups of C-shaped shaping operating platforms surrounding the tower column, two groups of linear telescopic operating platforms and a flexible inhaul cable for connecting the platforms, when the tower column works at a certain fixed position, the C-shaped shaping operating platforms and the linear telescopic operating platforms are connected by the flexible inhaul cable to form a closed shape, and meanwhile, the linear telescopic operating platforms extend out of the cantilever; when the suspension operating platform goes up and down to pass through an obstacle, the flexible inhaul cable is released, and the linear telescopic operating platform retracts the cantilever.
Further, still install lifting machine, operation control system, and the safety lock that drive operation platform goes up and down to move in suspending operation platform in midair, the lifting rope includes work lifting rope and safe lifting rope, and work lifting rope and safe lifting rope upper end all directly hang the tip at tower top movable support, and work lifting rope lower extreme is direct to link to each other with the lifting machine that suspends operation platform in midair, and safe lifting rope lower extreme passes the safety lock and links to each other with operation platform, bears the atress by work lifting rope during normal work, and safe lifting rope is receive and release with the ease, and when the work lifting rope takes place the danger and breaks, the safe lifting rope begins to bear the atress to automatic start safety lock brakes, prevents operation platform continuation decline.
Furthermore, a rope collector is further installed in the suspension operating platform and used for collecting and releasing lifting ropes and personnel safety ropes in the operating platform in a follow-up mode.
The beneficial effects of the utility model reside in that:
1) the maintenance system can realize the full-coverage maintenance of the position of the tower column, and when encountering obstacles such as the stay cable and the like, the stay cable can be avoided through the contraction of the linear telescopic operating platform, so that the requirement that the suspended operating platform freely ascends and descends along the tower column is met.
2) The hoisting point device at the top of the tower column has small volume, has small influence on the arrangement of auxiliary facilities at the top of the tower, and has less maintenance workload.
3) When the tower column top hoisting point device is not used, the movable support can be retracted into the parapet wall by using the telescopic structure, maintenance is facilitated, and the bridge landscape is not influenced.
4) The suspension operation platform adopts a truss structure made of high-strength aluminum alloy materials, so that the weight of the operation platform is greatly reduced, and the anchoring stress requirement of the tower top hoisting point device is lowered.
5) When the operation platform and the lifting rope are not used, the operation platform and the lifting rope can be placed in a storehouse, so that the operation platform and the lifting rope are prevented from being exposed in an outdoor environment, and the service life is greatly prolonged.
6) During the maintenance construction, because the construction influence scope is little, it is little to bridge floor driving influence.
Drawings
Fig. 1 is a forward bridge side view of a double-cable-plane cable-stayed bridge straight pylon overhaul system.
Fig. 2 is a cross-bridge side view of a double-cable-plane cable-stayed bridge straight tower column maintenance system.
Fig. 3 is a top view of a double-cable-plane cable-stayed bridge straight tower column maintenance system.
Fig. 4 is a large pattern a in fig. 1.
The figure includes: 1-lifting point device, 1.1-fixed support, 1.2-movable support, 1.3-telescopic mechanism, 1.4-lifting rope, 2-anti-falling device, 3-suspension operation platform, 3.1-C-shaped shaping operation platform, 3.2-linear telescopic operation platform, 3.3-flexible cable, 4-stay cable and 5-pylon top parapet.
Detailed Description
Example 1: maintenance system for straight tower column of double-cable-plane cable-stayed bridge
Referring to fig. 1-2, the maintenance system for the straight pylon of the double-cable-plane cable-stayed bridge comprises a hoisting point device 1, a falling prevention device 2 and a suspension operating platform 3, wherein the hoisting point device is fixed on a parapet 5 at the top end of the straight pylon.
Referring to fig. 3, 12 suspension point units 1 are symmetrically fixed on the top parapet 5 of the tower. Referring to fig. 4, the lifting point device 1 includes a fixed support 1.1, a movable support 1.2, a telescopic mechanism 1.3 and a lifting rope 1.4, the lifting rope is hung at the end of the movable support 1.2, the movable support 1.2 passes through the fixed support 1.1, the fixed support 1.1 is fixed on a straight pylon parapet 5, and the length of the movable support 1.2 extending out of the pylon wall is adjusted through the telescopic mechanism 1.3.
Referring to fig. 3, four 2 symmetries of anti-falling device are fixed on the pylon top, and anti-falling device 2 includes that one end is fixed at the personnel's safety rope on pylon top and is placed the rope locking device in suspending in midair operation platform, and personnel link to each other safety belt and personnel's safety rope through the rope locking device, and when operation platform goes up and down, the rope locking device slides along personnel's safety rope, and when operation platform reachd the maintenance position, press the rope locking device switch, lock safety belt and personnel's safety rope.
Referring to fig. 3, the suspended operation platform 3 includes two groups of C-shaped operation platforms 3.1 surrounding the tower, two groups of in-line telescopic operation platforms 3.2, and a flexible cable 3.3 connecting the two platforms. When the suspension operating platform works at a certain fixed position of the tower column, the C-shaped shaping operating platform 3.1 is connected with the linear telescopic operating platform 3.2 by using the flexible inhaul cable 3.3 to form a closed shape, and meanwhile, the linear telescopic operating platform 3.2 extends out of the cantilever; when the suspension operating platform goes up and down to pass through obstacles such as the stay cable 4 and the like, the flexible stay cable is released, and the linear telescopic operating platform 3.2 withdraws the cantilever. Referring to fig. 4, the suspended operation platform 3 is connected with the tower top movable support 1.2 through a lifting rope 1.4. And a lifting machine, an operation control system, a rope collecting device and a safety lock which are used for driving the operation platform to move up and down are also arranged in the suspension operation platform. The suspension operation platform is made of high-strength aluminum alloy, and wheels are arranged on the bottom surface of the suspension operation platform and can push in any direction. The safety lock is matched with the safety lifting rope, the working lifting rope bears stress during normal working, the safety lifting rope is wound and unwound along with the safety lifting rope, and when the working lifting rope is broken dangerously, the safety lifting rope begins to bear stress and automatically starts the safety lock to brake, so that the operation platform is prevented from continuously descending. When the operation platform is lifted, the rope retracting device is used for retracting redundant safety lifting ropes and working lifting ropes.
Example 2: maintenance of straight tower column of double-cable-plane cable-stayed bridge
The suspension operation platform is formed by welding high-strength aluminum alloy. When the lifting device is not used, the lifting device is placed in a storehouse, pushed to a bridge floor during maintenance, and hung on a movable support of a hanging point device of a tower top parapet wall through a lifting rope. The lifting control system for suspending the operating platform is arranged on the operating platform, and the maintenance personnel controls the lifting of the operating platform. The high-altitude anti-falling device is arranged at the top of the tower column, so that the safety of maintainers during working is guaranteed.
When the maintenance work is carried out, the operation platform is placed on the bridge floor firstly, personnel carry lifting rope and personnel safety rope, reach the pylon top from cat ladder (or elevator) in the straight pylon, telescopic machanism through the hoisting point device stretches out pylon top parapet and locks with the movable support, lowering lifting rope and personnel safety rope, install the lifting rope on operation platform again, personnel get into operation platform, with the safety belt system on personnel safety rope, operation control system, promote the maintenance position of operation platform to the pylon, overhaul the pylon. Refer to fig. 1 and 2.
After the overhaul is finished, the operation platform is lowered to the bridge floor, the lifting rope and the personnel safety rope are removed, personnel at the top of the tower column pack up the lifting rope and the personnel safety rope, and then the movable support is retracted into the parapet wall and fixed by utilizing the telescopic mechanism of the lifting point device. And (3) the personnel at the top of the tower column descend to the bridge floor from the top of the tower column through the ladder (or the elevator) in the tower, the operation platform is moved to a storehouse, and the overhaul is finished.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (4)
1. A maintenance system for the straight tower column of cable-stayed bridge with dual cable planes is composed of tower column, parapet wall on the top of tower column, stay cables on both sides, and maintenance system consisting of
The lifting point device is fixed on the parapet at the top end of the tower column and comprises a fixed support, a movable support, a telescopic mechanism and a lifting rope, the lifting rope is hung at the end part of the movable support, the movable support penetrates through the fixed support, the fixed support is fixed on the parapet at the top of the tower, and the telescopic mechanism is used for adjusting the length of the movable support extending out of the tower column;
the suspension operation platform is connected with the tower top movable support through a lifting rope;
the anti-falling device comprises a personnel safety rope with one end fixed at the top end of the tower column and a rope locking device placed in the suspension operation platform, and the rope locking device is used for locking a safety belt of an operator in the suspension operation platform with the personnel safety rope.
2. The system for overhauling the straight pylon of the double-cable-plane cable-stayed bridge according to claim 1, wherein the suspension operating platform is a truss structure formed by welding high-strength aluminum alloy.
3. The maintenance system of the straight pylon of the double-cable-plane cable-stayed bridge of claim 2, wherein the suspension operating platform comprises two groups of C-shaped fixed operating platforms surrounding the pylon, two groups of linear telescopic operating platforms and a flexible cable connecting the platforms, when the straight pylon works at a fixed position, the C-shaped fixed operating platforms and the linear telescopic operating platforms are connected by the flexible cable to form a closed state, and the linear telescopic operating platforms extend out of the cantilever; when the suspension operating platform goes up and down to pass through an obstacle, the flexible inhaul cable is released, and the linear telescopic operating platform retracts the cantilever.
4. The maintenance system of the straight tower column of the double-cable-plane cable-stayed bridge according to claim 1, characterized in that a hoist, an operation control system, a rope collector and a safety lock for driving the operation platform to move up and down are further installed in the suspension operation platform, the lifting rope comprises a working lifting rope and a safety lifting rope, the upper ends of the working lifting rope and the safety lifting rope are directly hung at the end part of the movable support at the top of the tower column, the lower end of the working lifting rope is directly connected with the hoist on the suspension operation platform, the lower end of the safety lifting rope penetrates through the safety lock to be connected with the operation platform, the working lifting rope bears the stress during normal operation, the safety lifting rope is wound and unwound along with the safety rope, when the working lifting rope is broken dangerously, the safety lifting rope begins to bear the stress, the safety lock is automatically started to; when the operation platform is lifted, the rope retracting device is used for retracting redundant safety lifting ropes and working lifting ropes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921419679.2U CN210886923U (en) | 2019-08-28 | 2019-08-28 | Maintenance system of straight pylon of double-cable-plane cable-stayed bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921419679.2U CN210886923U (en) | 2019-08-28 | 2019-08-28 | Maintenance system of straight pylon of double-cable-plane cable-stayed bridge |
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| CN210886923U true CN210886923U (en) | 2020-06-30 |
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| CN201921419679.2U Active CN210886923U (en) | 2019-08-28 | 2019-08-28 | Maintenance system of straight pylon of double-cable-plane cable-stayed bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485291A (en) * | 2019-08-28 | 2019-11-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of examination and repair system and its repair method of the straight king-post of double plane cable stayed bridge |
| CN113944108A (en) * | 2021-10-29 | 2022-01-18 | 中铁十四局集团有限公司 | Supporting device for bridge tower construction and construction method applying supporting device |
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2019
- 2019-08-28 CN CN201921419679.2U patent/CN210886923U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485291A (en) * | 2019-08-28 | 2019-11-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of examination and repair system and its repair method of the straight king-post of double plane cable stayed bridge |
| CN113944108A (en) * | 2021-10-29 | 2022-01-18 | 中铁十四局集团有限公司 | Supporting device for bridge tower construction and construction method applying supporting device |
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