CN114108502B - Synchronous dismantling construction method for multiple transverse overpasses of suspension bridge catwalk - Google Patents
Synchronous dismantling construction method for multiple transverse overpasses of suspension bridge catwalk Download PDFInfo
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- CN114108502B CN114108502B CN202111355870.7A CN202111355870A CN114108502B CN 114108502 B CN114108502 B CN 114108502B CN 202111355870 A CN202111355870 A CN 202111355870A CN 114108502 B CN114108502 B CN 114108502B
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 239000000725 suspension Substances 0.000 title claims abstract description 21
- 230000001360 synchronised effect Effects 0.000 title abstract description 6
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application discloses a synchronous dismantling construction method for a plurality of transverse overpasses of a suspension bridge catwalk, which comprises the following steps that S1, adjacent first transverse channels and second transverse channels are hoisted, the first transverse channels are hoisted through hoisting equipment, two lateral hoisting mechanisms and a middle hoisting mechanism in the hoisting equipment are both in hoisting fit with the first transverse channels, and after connection between the first transverse channels and the catwalk is dismantled, the first transverse channels are driven to move towards one side of a main tower through the hoisting equipment; s2, after a certain distance is moved, disconnecting the side hoisting mechanism from the first transverse channel, and driving the middle hoisting mechanism to rotate through a driving assembly in hoisting equipment, so that the first transverse channel rotates in a horizontal plane until two ends of the first transverse channel are positioned on the inner sides of two catwalks; s3, driving the first transverse channel to move upwards through the middle hoisting mechanism. The application has the effect that has promoted the hoist and mount efficiency to the transverse channel of demolishing.
Description
Technical Field
The invention relates to the field of dismantling of transverse channels of a suspension bridge catwalk, in particular to a synchronous dismantling construction method for a plurality of transverse overpasses of a suspension bridge catwalk.
Background
At present, in the construction process of a suspension bridge, a catwalk is generally arranged below the left and right corresponding main cable center lines, and the catwalk is in a three-span continuous form and is arranged in a line shape parallel to the main cable. In order to facilitate the constructors to pass between the two catwalks, a plurality of transverse channels are arranged between the two catwalks at intervals.
And after the cable clamps and slings are installed, the catwalk is required to be lifted before the steel beam is lifted, and the lifted catwalk is suspended on the main cable. After the catwalk is changed to be hung, the transverse channel is also required to be dismantled.
In the related art, when dismantling the transverse channel, need to dismantle through two overhead traveling crane 1 on two sets of portal bearing ropes of two catwalk tops of sliding frame respectively, be equipped with two hoist ropes 11 that are used for hoisting transverse channel respectively in the both ends of catwalk on the overhead traveling crane 1, hoist and mount the hoist rope 11 through cooperating hoist and mount on transverse channel.
With respect to the related art in the above, the inventors consider that there are the following drawbacks: in the hoisting process, the transverse channels can be hoisted one by one only through the hoisting mode, one transverse channel is hoisted and moved to the side of the main bridge and lowered, and then the next transverse channel is hoisted, so that the construction period is longer, and the construction efficiency is required to be improved.
Disclosure of Invention
In order to improve the hoisting efficiency of the dismantled transverse channel, the application provides a synchronous dismantling construction method for a plurality of transverse overpasses of a suspension bridge catwalk.
The application provides a synchronous dismantling construction method for a plurality of transverse overpasses of a suspension bridge catwalk, which adopts the following technical scheme:
a construction method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk comprises the following steps:
s1, hoisting adjacent first transverse channels and second transverse channels, hoisting the first transverse channels through hoisting equipment, wherein two lateral hoisting mechanisms and a middle hoisting mechanism in the hoisting equipment are in hoisting fit with the first transverse channels, and after connection between the first transverse channels and catwalk is removed, the hoisting equipment drives the first transverse channels to move towards one side of a main tower;
s2, after a certain distance is moved, disconnecting the side hoisting mechanism from the first transverse channel, and driving the middle hoisting mechanism to rotate through a driving assembly in hoisting equipment, so that the first transverse channel rotates in a horizontal plane until two ends of the first transverse channel are positioned on the inner sides of two catwalks;
s3, driving the first transverse channel to move upwards through the middle hoisting mechanism until the first transverse channel can pass through the upper part of the second transverse channel;
s4, the hoisting equipment continues to drive the first transverse channel to move towards one side of the main tower until the hoisting equipment moves to the position right above the second transverse channel, hoisting and matching with the second transverse channel through a side hoisting mechanism, and after connection between the second transverse channel and the catwalk is removed, driving the second transverse channel and the first transverse channel to move towards one side of the main tower through the hoisting equipment;
s5, hoisting the two transverse channels to the side of the main tower by hoisting equipment and lowering the two transverse channels;
the two side hoisting mechanisms are respectively located right above the two catwalks, and the middle hoisting mechanism is located between the two side hoisting mechanisms.
Through adopting above-mentioned technical scheme, firstly hoist and mount first transverse channel, rotation angle and promote, remove to second transverse channel top again and hoist another transverse channel, under the condition that has realized single round trip, hoist and mount to first transverse channel and second transverse channel, under the condition that the transverse channel quantity of waiting to demolish is the same, hoist and mount equipment's round trip number of times has been reduced, has promoted the hoist and mount efficiency to demolish transverse channel, has shortened construction period, has promoted the efficiency of construction.
Preferably, in the step S1, before hoisting the adjacent first transverse channel and second transverse channel in a single pass, the side guard rail on the transverse channel is removed.
By adopting the technical scheme, the height of the first transverse channel required to be moved upwards is reduced by reducing the height of the transverse channel.
Preferably, in the step S2, the first transverse channel rotates by 90 degrees under the action of the hoisting mechanism.
Through adopting above-mentioned technical scheme, the first transverse channel rotates 90 degrees back and is perpendicular with the second transverse channel, compares in first transverse channel and rotates to other angles, and the equilibrium is better, and stability is higher.
Preferably, the hoisting equipment comprises a supporting truss fixedly arranged between two side hoisting mechanisms, the driving assembly is fixedly arranged on the supporting truss, and the middle hoisting mechanism is arranged at the output end of the driving assembly.
Through adopting above-mentioned technical scheme, when needs drive first transverse channel and rotate, start the driving piece, the lifting subassembly drives first transverse channel and rotates under drive assembly's effect, realizes the adjustment to the angle of first transverse channel in the horizontal plane.
Preferably, the output end of the driving assembly is provided with a lifting assembly, the lifting assembly comprises a connecting truss fixedly arranged at the output end of the driving assembly and a linear driving piece fixedly arranged on the connecting truss, the linear driving piece is vertically arranged, two linear driving pieces are arranged at two ends along a first transverse channel, and the output end of the linear driving piece is hinged with the middle lifting mechanism.
Through adopting above-mentioned technical scheme, because portal bearing cable has certain radian, first transverse channel is after rotating certain angle, hardly keeps the state that both ends are located same horizontal plane, and when the difference in height at first transverse channel both ends was great, constructor adjusted two sharp driving pieces respectively, and then adjusts the height at first transverse channel both ends, reduces the difference in height at first transverse channel both ends, increases the balance and the stability of first transverse channel removal along with lifting device along portal bearing cable removal in-process.
Preferably, a connecting rod is fixedly arranged at the top end of the connecting truss, a chute is formed in the supporting truss, and the connecting rod penetrates through the chute and is in sliding fit with the chute.
By adopting the technical scheme, the sliding fit between the connecting truss and the supporting truss is realized, and the stability of connection between the connecting truss and the supporting truss is improved.
Preferably, the top end of the connecting rod is outwards bent to form an extension rod, and the extension rod is abutted to the upper surface of the support truss.
Through adopting above-mentioned technical scheme, played further supporting role to lifting subassembly and middle part hoist and mount subassembly, increased the stability of middle part hoist and mount subassembly.
Preferably, the first transverse channel is located on a side remote from the main tower and the second transverse channel is located on a side close to the main tower.
Through adopting above-mentioned technical scheme, during the hoist and mount, remove lifting device to first horizontal passageway top earlier, then hoist and mount first horizontal passageway and second horizontal passageway in proper order to the direction towards the main tower again, hoist and mount order is reasonable, has promoted hoist and mount efficiency.
In summary, the present application includes at least one of the following beneficial technical effects:
1. under the condition of single round trip, the first transverse channel and the second transverse channel are hoisted, the round trip times of hoisting equipment under the condition that the number of the transverse channels to be dismantled is the same are reduced, the hoisting efficiency of the dismantled transverse channels is improved, the construction period is shortened, and the construction efficiency is improved;
2. the first transverse channel rotates 90 degrees and then is perpendicular to the second transverse channel, and compared with the first transverse channel which rotates to other angles, the balance degree is better and the stability is higher.
Drawings
Fig. 1 is a schematic diagram showing a lateral channel lifting manner in the background art.
Fig. 2 is a schematic view showing a hoisting state when the hoisting device hoistes the first transverse passage.
Fig. 3 is an enlarged partial schematic view of the portion a in fig. 2.
Fig. 4 is a schematic view showing a state of hoisting when the hoisting device hoistes the first transverse passage and the second transverse passage.
Fig. 5 is a partially enlarged schematic view of the portion B in fig. 4.
Reference numerals illustrate:
1. a crown block; 11. a sling; 21. a first transverse channel; 22. a second transverse channel; 3. a side hoisting mechanism; 31. hoisting the crown block; 32. a side hanging rope set; 4. a support truss; 41. a drive assembly; 42. a lifting assembly; 421. a connecting truss; 422. a linear driving member; 43. a side truss; 431. a chute; 5. a middle hoisting mechanism; 51. hoisting the truss; 52. a middle lifting rope group; 6. a connecting rod; 61. an extension rod; 7. a catwalk; 8. and a portal frame bearing rope.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-5.
The embodiment of the application discloses a construction method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk.
Referring to fig. 2, a construction method for synchronously dismantling multiple transverse overpasses of a suspension bridge catwalk is used for hoisting two adjacent transverse channels through hoisting equipment under the condition of single round trip.
Wherein the transverse channel at the side far from the main tower is a first transverse channel 21, and the transverse channel at the side near the main tower is a second transverse channel 22.
The hoisting equipment comprises two side hoisting mechanisms 3, a support truss 4 arranged between the two side hoisting mechanisms 3 and a middle hoisting mechanism 5 arranged on the support truss 4.
The two side hoisting mechanisms 3 are respectively located right above the two catways 7, the side hoisting mechanisms 3 comprise hoisting crown blocks 31 which are in sliding fit on the portal frame bearing ropes 8 and two groups of side hoisting rope groups 32 which are arranged on the hoisting crown blocks 31, and the two groups of side hoisting rope groups 32 are respectively located on two sides of the catways 7 and are used for being in hoisting fit with the transverse channels. In this embodiment, the side hanging rope set 32 is connected to the hanging crown block 31 through a chain block or an electric block.
The support truss 4 is welded and fixed between the two hoisting crown blocks 31, and the support truss 4 extends along the distribution direction of the two hoisting crown blocks 31.
The middle position of the lower surface of the support truss 4 is fixed with a driving component 41, the driving component 41 is vertically arranged, and in the embodiment, the driving component 41 is arranged as a motor.
The lifting assembly 42 is fixedly arranged at the output end of the driving assembly 41, the lifting assembly 42 comprises a connecting truss 421 fixedly welded at the output end of the motor and two linear driving pieces 422 fixedly arranged at two ends of the connecting truss 421, the linear driving pieces 422 are vertically arranged, and in the embodiment, the linear driving pieces 422 are arranged as electric cylinders.
Referring to fig. 2 and 3, a connecting rod 6 is welded and fixed to the top end of the connecting truss 421, the connecting rod 6 is vertically disposed, and two connecting rods 6 are symmetrically disposed on two sides of the driving assembly 41. The side trusses 43 are integrally formed on two sides of the support truss 4, the side trusses 43 and the support truss 4 are provided with sliding grooves 431 corresponding to the connecting rods 6, the sliding grooves 431 are through grooves penetrating through the side trusses 43 in the thickness direction, and the connecting rods 6 penetrate through the sliding grooves 431 and are in sliding fit with the sliding grooves 431. The top end of the connecting rod 6 is outwards bent to form an extension rod 61, and the extension rod 61 is abutted against the upper surface of the supporting truss 4.
Referring to fig. 4 and 5, the middle lifting mechanism 5 includes a lifting truss 51, the lifting truss 51 is disposed along a length direction of the connecting truss 421, an output end of the linear driving member 422 is hinged to an upper surface of the lifting truss 51, and a hinge shaft between the linear driving member 422 and the lifting truss 51 is disposed along a width direction of the lifting truss 51.
The two sides of the hoisting truss 51 are respectively connected with a middle hoisting rope group 52 through an electric hoist, and the middle hoisting rope group 52 is used for being in hoisting fit with the transverse channel.
The construction method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk, which is combined with fig. 1 to 5, comprises the following steps:
s1, pulling a hoisting device through a winch on a saddle hanging bracket positioned at the top of a main tower, so that the hoisting device moves to the position right above a first transverse channel 21 along a portal bearing cable 8;
s2, hoisting adjacent first transverse channels 21 and second transverse channels 22, hoisting and matching the side hoisting rope groups 32 in the side hoisting mechanisms 3 with the first transverse channels 21, hoisting and matching the middle hoisting rope groups 52 in the middle hoisting mechanisms 5 with the first transverse channels 21, and after the hoisting is completed and the connection between the first transverse channels 21 and the catwalk 7 is removed, driving the first transverse channels 21 to move towards one side of the main tower;
s3, when the first transverse channel 21 moves to be close to the second transverse channel 22 and the distance between the first transverse channel 21 and the second transverse channel 22 is larger than the length of the transverse channel, the side lifting rope group 32 in the side lifting mechanism 3 is disconnected from the first transverse channel 21, and the driving assembly 41 is started to drive the lifting assembly 42 and the first transverse channel 21 to rotate so that the first transverse channel 21 rotates 90 degrees in the horizontal plane;
s4, driving the first transverse channel 21 to move upwards through a middle lifting rope group 52 in the middle lifting mechanism 5 until the first transverse channel 21 can pass through above the second transverse channel 22;
s5, the hoisting equipment continues to drive the first transverse channel 21 to move towards one side of the main tower until the hoisting equipment moves to the position right above the second transverse channel 22, the side hoisting rope group 32 in the side hoisting mechanism 3 is in hoisting fit with the second transverse channel 22, and after the hoisting is completed and the connection between the second transverse channel 22 and the catwalk 7 is removed, the second transverse channel 22 and the first transverse channel 21 are driven to move towards one side of the main tower;
in the moving process, when the height difference between the two ends of the first transverse channel 21 is large, the two linear driving pieces 422 are respectively adjusted, so that the heights of the two ends of the first transverse channel 21 are adjusted, the height difference between the two ends of the first transverse channel 21 is reduced, and the balance and stability of the first transverse channel 21 are improved;
s6, hoisting the first transverse channel 21 and the second transverse channel 22 to the side of the main tower by hoisting equipment and lowering the first transverse channel and the second transverse channel.
The embodiment of the application discloses a construction method is demolishd in step to suspension bridge catwalk multichannel horizontal overpass, has realized under the condition of single round trip, to the hoist and mount of first horizontal passageway 21 and second horizontal passageway 22, has reduced the round trip number of lifting device under the condition that wait to demolish horizontal passageway quantity the same, has promoted the hoist and mount efficiency to demolish horizontal passageway, has shortened construction period, has promoted the efficiency of construction.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. The construction method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk is characterized by comprising the following steps of:
s1, hoisting adjacent first transverse channels (21) and second transverse channels (22), hoisting the first transverse channels (21) through hoisting equipment, wherein a middle hoisting mechanism (5) and two side hoisting mechanisms (3) in the hoisting equipment are in hoisting fit with the first transverse channels (21), and after connection between the first transverse channels (21) and a catwalk (7) is removed, the hoisting equipment drives the first transverse channels (21) to move towards one side of a main tower;
s2, after a certain distance is moved, the side hoisting mechanism (3) is disconnected from the first transverse channel (21), and the middle hoisting mechanism (5) is driven to rotate through a driving component (41) in hoisting equipment, so that the first transverse channel (21) rotates in a horizontal plane until two ends of the first transverse channel (21) are positioned on the inner sides of two catwalks (7);
s3, driving the first transverse channel (21) to move upwards through the middle hoisting mechanism (5) until the first transverse channel (21) can pass through the upper part of the second transverse channel (22);
s4, the hoisting equipment continues to drive the first transverse channel (21) to move towards one side of the main tower until the hoisting equipment moves to the position right above the second transverse channel (22), the hoisting equipment is in hoisting fit with the second transverse channel (22) through the side hoisting mechanism (3), and after connection between the second transverse channel (22) and the catwalk (7) is removed, the hoisting equipment drives the second transverse channel (22) and the first transverse channel (21) to move towards one side of the main tower;
s5, hoisting the two transverse channels to the side of the main tower by hoisting equipment and lowering the two transverse channels;
the two side hoisting mechanisms (3) are respectively positioned right above the two catways (7), and the middle hoisting mechanism (5) is positioned between the two side hoisting mechanisms (3).
2. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 1, which is characterized in that: in the step S1, before hoisting the adjacent first transverse channel (21) and second transverse channel (22) in a single way, the side guardrails on the transverse channels are removed.
3. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 1, which is characterized in that: in the step S2, the first transverse channel (21) rotates by 90 degrees under the action of the hoisting device.
4. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 3, which is characterized in that: the hoisting equipment comprises a supporting truss (4) fixedly arranged between two side hoisting mechanisms (3), the driving assembly (41) is fixedly arranged on the supporting truss (4), and the middle hoisting mechanism (5) is arranged at the output end of the driving assembly (41).
5. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 4, which is characterized in that: the output of drive assembly (41) is provided with lifting subassembly (42), lifting subassembly (42) are including setting firmly connecting truss (421) and setting firmly in straight line driving piece (422) of connecting truss (421) in the output of drive assembly (41), straight line driving piece (422) vertical setting, straight line driving piece (422) are provided with two along the both ends of first transverse channel (21), the output of straight line driving piece (422) is articulated with middle part hoist mechanism (5).
6. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 5, which is characterized in that: connecting rod (6) has been set firmly on connecting truss (421) top, spout (431) have been seted up on lattice (4), connecting rod (6) wear to locate in spout (431) and with spout (431) sliding fit.
7. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 6, which is characterized in that: the top end of the connecting rod (6) is outwards bent to form an extension rod (61), and the extension rod (61) is abutted to the upper surface of the supporting truss (4).
8. The method for synchronously dismantling a plurality of transverse overpasses of a suspension bridge catwalk according to claim 1, which is characterized in that: the first transverse channel (21) is located on the side remote from the main tower and the second transverse channel (22) is located on the side close to the main tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355870.7A CN114108502B (en) | 2021-11-16 | 2021-11-16 | Synchronous dismantling construction method for multiple transverse overpasses of suspension bridge catwalk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355870.7A CN114108502B (en) | 2021-11-16 | 2021-11-16 | Synchronous dismantling construction method for multiple transverse overpasses of suspension bridge catwalk |
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| Publication Number | Publication Date |
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| CN114108502A CN114108502A (en) | 2022-03-01 |
| CN114108502B true CN114108502B (en) | 2024-03-15 |
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| CN202111355870.7A Active CN114108502B (en) | 2021-11-16 | 2021-11-16 | Synchronous dismantling construction method for multiple transverse overpasses of suspension bridge catwalk |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649810A (en) * | 1992-07-27 | 1994-02-22 | Teruo Takatsu | Method of removing bridge crossbeam |
| CA2897654A1 (en) * | 2014-07-15 | 2016-01-15 | Warrior Rig Ltd. | Pipe handling apparatus and methods |
| CN111155451A (en) * | 2020-01-16 | 2020-05-15 | 中铁十九局集团第六工程有限公司 | Method for dismantling highway-span iron bridge |
| CN111764294A (en) * | 2020-07-15 | 2020-10-13 | 安徽晟园景观工程有限公司 | Method for dismantling catwalk plate |
| WO2021078310A1 (en) * | 2019-10-21 | 2021-04-29 | 宁波市政工程建设集团股份有限公司 | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor |
-
2021
- 2021-11-16 CN CN202111355870.7A patent/CN114108502B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649810A (en) * | 1992-07-27 | 1994-02-22 | Teruo Takatsu | Method of removing bridge crossbeam |
| CA2897654A1 (en) * | 2014-07-15 | 2016-01-15 | Warrior Rig Ltd. | Pipe handling apparatus and methods |
| WO2021078310A1 (en) * | 2019-10-21 | 2021-04-29 | 宁波市政工程建设集团股份有限公司 | Method for removal of temporary support system for road bridge pre-fabricated small box girder-type concealed bent cap, and equipment therefor |
| CN111155451A (en) * | 2020-01-16 | 2020-05-15 | 中铁十九局集团第六工程有限公司 | Method for dismantling highway-span iron bridge |
| CN111764294A (en) * | 2020-07-15 | 2020-10-13 | 安徽晟园景观工程有限公司 | Method for dismantling catwalk plate |
Non-Patent Citations (1)
| Title |
|---|
| 一种贝雷式悬索桥猫道横向通道构造;贾兵团;张明闪;王培;张波;于学强;;公路;20170525(第05期);全文 * |
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