CN210236912U - Movable cable carrying crane capable of carrying and walking track mechanism and walking system thereof - Google Patents
Movable cable carrying crane capable of carrying and walking track mechanism and walking system thereof Download PDFInfo
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- CN210236912U CN210236912U CN201920579842.5U CN201920579842U CN210236912U CN 210236912 U CN210236912 U CN 210236912U CN 201920579842 U CN201920579842 U CN 201920579842U CN 210236912 U CN210236912 U CN 210236912U
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Abstract
The utility model discloses a movable cable carrying crane capable of carrying, a walking track mechanism and a walking system thereof, wherein the walking track mechanism comprises a plurality of cable clamp assemblies and track assemblies; the cable clamp assemblies are arranged at intervals along the longitudinal direction of a main cable of the suspension bridge, each cable clamp assembly comprises a base and a cable clamp piece arranged on the base, and the cable clamp pieces are used for being fixed with the main cable or a main cable hoop of the suspension bridge; the track assembly is fixed on the bases and is used for the running mechanism of the cable crane to run. From this, traditional cable carries loop wheel machine relatively regards the main push-towing rope as the track, the utility model discloses set up special walking track mechanism, move down the track focus, its load passes power to main push-towing rope bearing through walking track mechanism when lifting by crane strength nature beam segment section, and its atress characteristics are unanimous with permanent cable clip to the effect of main push-towing rope, can solve the problem that the main push-towing rope warp the distortion atress and warp, improve the stability of cable carries loop wheel machine walking, and the walking in-process is to the zero injury of main push-towing rope.
Description
Technical Field
The utility model relates to a bridge construction technical field especially relates to a can carry removal cable and carry loop wheel machine and walking track mechanism and traveling system thereof with area.
Background
A suspension bridge, also known as a suspension bridge, refers to a bridge having two main cables suspended by a cable tower and anchored to both banks (or both ends of the bridge) at intervals in the width direction of the bridge as main upper load-bearing members. With the rapid development of the large-span suspension bridge in China, the cable crane has been used as a special hoisting device for vertically hoisting and installing the stiff beam of the suspension bridge. Suspension bridge stiffness beam is usually manufactured into segments in factories or on site, the stiffness beam segments are transported to the position right below a hoisting position in a shipping mode, and a cable crane is adopted to vertically hoist or swing at a small angle to install the stiffness beam segments. The conventional cable crane cannot travel on the main cable with load and only can vertically lift at a fixed point, so that the cable crane is not suitable for the requirement that the stiff beam segments in mountainous areas longitudinally move to the installation position after being lifted from two tower sides, and is also not suitable for the installation of the stiff beam segments at the shallow water position near the bridge span shore. For the installation of suspension bridges in mountainous areas and without shipping conditions, a cable crane hoisting method or a bridge deck bridge erecting machine girder erecting method is generally adopted, but the two methods do not utilize a suspension bridge main cable as a bearing system, so that the measure cost of bridge construction is increased. The invention Chinese patent CN106916354B discloses a cable crane combining hoisting and walking, the walking system of the patent uses the main cable of a suspension bridge as a walking guide rail, the cable crane walks along the main cable through a traction device, the acting point of the main cable stress is positioned above the main cable, the main cable is easy to generate the risk of deflection and distortion when the cable crane is subjected to wind load, sunlight deflection irradiation and unbalanced load stress of a lifted heavy object in the process of on-load walking, the walking stability of the cable crane is reduced, and the cable crane and the walking wheel of the traditional cable crane walk on the main cable directly, so that the damage to the main cable is easy to cause. However, the traditional cable crane cannot realize the on-load walking due to the limited walking speed, only one stiff beam segment can be installed every day, and the construction efficiency is low.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an improve cable and carry loop wheel machine walking stability, the zero cable that injures of main push-towing winch walking track mechanism and traveling system in the walking process still correspondingly provide and install this traveling system can take the area to carry and remove cable and carry loop wheel machine.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a walking track mechanism of a movable cable carrying crane with load comprises a plurality of cable clamp assemblies and a track assembly;
the cable clamp assemblies are arranged at intervals along the longitudinal direction of a main cable of the suspension bridge, each cable clamp assembly comprises a base and a cable clamp piece arranged on the base, and the cable clamp pieces are used for being connected with a main cable hoop of the suspension bridge;
the track assembly is fixed on the bases and is used for the running mechanism of the cable crane to run.
From this, traditional cable carries loop wheel machine relatively regards the main push-towing rope as the track, the utility model discloses set up special walking track mechanism, move down the track focus, its load passes power to main push-towing rope bearing through walking track mechanism when lifting by crane strength nature beam segment section, and its atress characteristics are unanimous with permanent cable clip to the effect of main push-towing rope, can solve the main push-towing rope and deflect distortion atress and warp the problem, improve the stability that can carry the walking of removal cable carries loop wheel machine, and the walking in-process is to the zero injury of main push-towing rope.
As a further improvement of the above technical solution:
as a specific structure of the rail assembly, the rail assembly includes a rail beam and a guide rail mounted on the rail beam.
The base is preferably a box-shaped steel beam base; the track beam is preferably a box-shaped steel beam or a steel truss beam.
When two cable cranes are arranged on the track beam, the two cable cranes are connected with a traction wheel shaft assembly of the main beam by connecting steel wire ropes.
In order to improve the balance and stability of the walking of the cable crane, two track assemblies are arranged and are respectively arranged on two sides of a main cable of the suspension bridge, and a running span is formed between the two cable clamp assemblies.
As a specific structure of the cable clamp, the cable clamp is a cable clamp connected with a main cable hoop.
The walking track mechanism is arranged close to the permanent cable clamp of the main cable, the cable clamp consists of two cable clamp blocks with arcs and a connecting screw rod, and the arcs of the cable clamp blocks are matched with the main cable and connected with the anchor ear of the main cable through the cable clamp blocks.
As a general inventive concept, the utility model also provides a traveling system of the movable cable crane with load, which comprises a traveling mechanism and the traveling track mechanism; the running mechanism is arranged on the track assembly and can move back and forth along the longitudinal direction of the main cable.
As a further improvement of the above technical solution:
the running mechanism comprises a running mechanism main body and a running part arranged corresponding to the track assembly, and the running part is arranged at the lower end of the running mechanism main body; the walking mechanism main body is used for being connected with a main body beam of the cable crane.
The walking mechanism main body is supported by two rows of walking wheels to stretch over the walking track mechanism and the main cable; the running mechanism does not contact with the main cable when running, and the load of the running mechanism is sequentially transmitted to the guide rail, the track beam, the base and the cable clamp to the main cable through the running wheels of the running mechanism and is borne by the main cable.
The walking piece is a walking wheel matched with the guide rail. The single-row traveling wheels of the optimal traveling mechanism are 2-4 traveling wheels.
As a general inventive concept, the present invention further provides a cable crane, which comprises a main body beam, and two traveling systems, wherein the two traveling systems are respectively disposed at two ends of the main body beam, and the traveling mechanism is connected to the main body beam.
Therefore, the cable clamp in the walking track mechanism is connected with the anchor ear of the main cable of the suspension bridge and indirectly supported by the main cable, and the cable carrying crane moves on the guide rail on the track beam along the axle axis of the bridge, so that the horizontal movement and lifting of the stiff beam section are realized, and the installation of the stiff beam section is completed.
In order to ensure that the cable crane is vertically stressed at different crawling angles in the full-bridge range, the angle of the main beam is automatically adjusted, and the end part of the main beam is connected with the travelling mechanism main body through a shaft rod.
The main body beam is preferably a steel truss beam or a steel box girder, and reinforcing measures are arranged at two ends of the main body beam.
As a further improvement of the above technical solution:
in order to drive the travelling mechanism to move, the cable crane further comprises a traction mechanism, and the traction mechanism is used for drawing the travelling mechanism to move back and forth along the longitudinal direction of the main cable.
The traction mechanism comprises a traction wheel shaft assembly, a traction cable and a traction winch; the traction sheave shaft assembly is fixed on the main body beam, one end of the traction rope is wound on the traction sheave shaft assembly, the other end of the traction rope is wound on the traction winch, and the traction winch is fixed on one bank of the suspension bridge.
The two groups of traction mechanisms are symmetrically arranged at two end parts of the main body beam. The main body beam is drawn by the traction mechanism to enable the travelling wheels of the travelling mechanism to roll and translate along the guide rails.
In order to ensure the vertical lifting of the on-load mobile tracked cable crane, the cable crane further comprises a hoisting mechanism for hoisting stiff beam segments of the suspension bridge.
The hoisting mechanism comprises a hoisting wheel shaft assembly, a hoisting cable and a hoisting winch; the hoisting wheel shaft assembly is fixed on the main body beam and is arranged below the traction wheel shaft assembly; one end of the hoisting cable is wound on the hoisting wheel shaft assembly, the other end of the hoisting cable is wound on the hoisting winch, and the hoisting winch is fixed on one bank of the suspension bridge.
And the hoisting cable is connected with the lower hanging rack below by bypassing the hoisting cable wheel shaft assembly after being out of the hoisting winch.
The cable crane further comprises a cable supporting mechanism, and the cable supporting mechanism is used for preventing the traction cable from being wound with the hoisting cable.
The cable supporting mechanism comprises a cable supporting device bearing cable and a cable supporting device wheel shaft assembly, the cable supporting device bearing cable is tensioned between two towers of the suspension bridge, and the cable supporting device wheel shaft assembly is supported on the cable supporting device bearing cable; the cable supporting device wheel shaft assembly is fixed on the main body beam and arranged above the traction wheel shaft assembly.
The rigger axle assembly is disposed atop the body beam and directly above the hoist and traction axle assemblies.
Furthermore, the hoisting wheel shaft assembly and the traction wheel shaft assembly are positioned in the same vertical plane, and the cable supporter bearing cable is arranged above the inner sides of the two cable tower main cables; the hoisting cable bypasses the cable holder wheel shaft assembly to be connected with the hoisting wheel shaft assembly, and the traction cable bypasses the cable holder wheel shaft assembly to be connected with the traction wheel shaft assembly.
Compared with the prior art, the utility model has the advantages of:
1. the utility model discloses a purpose-built walking track mechanism, it is connected with the main push-towing rope staple bolt through the cable clamp subassembly on the walking track mechanism, and set up the track roof beam between adjacent cable clamp subassembly, it can carry the load and remove cable carrier crane and remove along the track roof beam under draw gear's traction, its strength nature beam segment section load passes through the cable clamp subassembly and transmits to the main push-towing rope, directly arrange the current cable carrier crane in the main push-towing rope top for the walking wheel, its track focus moves down, the atress problem of main push-towing rope deflection distortion has been solved, the stability of can carrying the load and remove cable carrier crane walking has been improved.
2. The moving rail type cable crane with load changes the contact mode of the travelling wheel and the main cable in the traditional scheme, and avoids the damage to the main cable; and the position of the cable clamp connected with the main cable hoop is close to the position of the permanent cable clamp, so that the position and the design of the vertical stress point of the main cable are kept consistent, and the influence on the line type of the main cable is reduced.
3. The utility model discloses a large-tonnage hoist engine is as hoisting system, the power equipment of operating system, can high-efficient swift bridge of erectting, and two roof beams can be erect at least to a shift, have improved the construction work efficiency of erecting the roof beam.
4. The utility model discloses a walking with load, its application scope is wide, no topography condition restriction.
Drawings
Fig. 1 is a schematic structural view of the traveling track mechanism of the cable crane of the present invention.
Fig. 2 is a schematic view of the traveling mechanism of the cable crane according to the present invention.
Fig. 3 is a schematic side view of the traveling mechanism of the cable crane of the present invention.
Fig. 4 is a schematic view of the traveling system of the cable crane according to the present invention.
Fig. 5 is a schematic side view of the traveling system of the cable crane of the present invention.
Fig. 6 is a schematic front view of the cable crane according to the present invention (the main body beam is a box-shaped main body beam).
Fig. 7 is a schematic front view of the cable crane of the present invention (the main body beam is a steel truss main body beam).
Fig. 8 is a schematic side view of a suspension bridge employing the cable crane of the present invention for stiffness beam segment installation.
Illustration of the drawings: 1. a body beam; 2. a traveling mechanism; 21. a traveling mechanism main body; 22. a walking member; 3. a track assembly; 31. a track beam; 32. a guide rail; 4. a cable clamp assembly; 41. a base; 42. a cable clamp; 5. a lifting axle assembly; 6. a lower hanging rack; 7. hoisting cables; 8. a traction sheave shaft assembly; 9. a rope carrier axle assembly; 10. a main cable; 11. connecting ropes; 12. a traction cable; 13. a traction winch; 14. hoisting a winch; 15. a cable supporting device bearing cable; 16. a stiff beam segment.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
Example 1:
as shown in fig. 6 to 8, the cable crane of the present embodiment is a movable rail-mounted cable crane. Comprises two walking track mechanisms, two walking mechanisms 2 corresponding to the walking track mechanisms, a main body beam 1, a traction mechanism, a hoisting mechanism and a supporting cable mechanism.
The two walking rail mechanisms are respectively arranged corresponding to the two main cables 10 at the corresponding ends of the suspension bridge.
As shown in fig. 1, the running rail mechanism includes a plurality of cable clamp assemblies 4 and a rail assembly 3.
The cable clamp assemblies 4 are arranged at intervals along the longitudinal direction of the main cable 10 of the suspension bridge, each cable clamp assembly 4 comprises a base 41 and a cable clamp 42 arranged on the base 41, and the cable clamp 42 is used for being connected with the anchor ear of the main cable 10 of the suspension bridge; in this embodiment, the cable clamp 42 is a cable clamp for fixing the main cable hoop 10 of the suspension bridge.
The track assembly 3 is fixed on a plurality of bases 41, and the track assembly 3 is used for the running mechanism 2 of the cable crane to run.
In this embodiment, the track assembly 3 includes a track beam 31 and a guide rail 32 mounted on the track beam 31. The number of the track assemblies 3 is two, and the two track assemblies 3 are respectively arranged on two sides of the main cable 10 of the suspension bridge.
In this embodiment, the track beam 31 is formed by connecting a plurality of beams, and each beam is fixed between two adjacent cable clamp assemblies.
As shown in fig. 4 and 5, the running gear 2 is provided on the rail assembly 3, and the running gear 2 is reciprocally movable in the longitudinal direction of the main cable 10.
As shown in fig. 2-3, the traveling mechanism 2 includes a traveling mechanism main body 21 and a traveling member 22 disposed corresponding to the rail assembly 3, and the traveling member 22 is disposed at a lower end of the traveling mechanism main body 21; two traveling mechanism bodies 21 are connected to both ends of the body beam 1 via the axle rods 18, respectively. In this embodiment, the traveling member 22 is a traveling wheel that cooperates with the guide rail 32.
As shown in fig. 8, the traction mechanism serves to pull the running mechanism 2 to reciprocate in the longitudinal direction of the main cable 10.
In this embodiment, the traction mechanism includes a traction sheave shaft assembly 8, a traction rope 12, and a traction winch 13; the traction sheave shaft assembly 8 is fixed on the main body beam 1, one end of the traction rope 12 is wound on the traction sheave shaft assembly 8, the other end of the traction rope 12 is wound on the traction winch 13, and the traction winch 13 is fixed on one bank of the suspension bridge.
As shown in fig. 8, the hoisting mechanism is used to hoist stiff beam segments 16 of the suspension bridge.
In this embodiment, the hoisting mechanism includes a hoisting wheel axle assembly 5, a hoisting cable 7, and a hoisting winch 14; the hoisting wheel shaft assembly 5 is fixed on the main body beam 1, and the hoisting wheel shaft assembly 5 is arranged below the traction wheel shaft assembly 8; one end of the hoisting cable 7 is wound on the hoisting wheel shaft assembly 5, the other end of the hoisting cable 7 is wound on the hoisting winch 14, and the hoisting winch 14 is fixed on one bank of the suspension bridge.
As shown in fig. 8, the stay mechanism is used to prevent the traction cable 12 from being entangled with the hoist cable 7.
In this embodiment, the rope supporting mechanism comprises a rope supporting device bearing rope 15 and a rope supporting device wheel shaft assembly 9, the rope supporting device bearing rope 15 is tensioned between two towers of the suspension bridge, and the rope supporting device wheel shaft assembly 9 is supported on the rope supporting device bearing rope 15; the cable supporter wheel shaft assembly 9 is fixed on the main body beam 1, and the cable supporter wheel shaft assembly 9 is arranged above the traction wheel shaft assembly 8.
As shown in fig. 6, the main body beam 1 of the present embodiment is a box-shaped steel beam, and in another embodiment, as shown in fig. 7, the main body beam 1 may be a steel truss beam. Two ends of the main body beam 1 are connected with a travelling mechanism main body 21 through a shaft rod 18, two rows of 2 travelling wheels 22 are arranged below the travelling mechanism main body 21, and travelling wheel stiffening ribs 23 are arranged between the two rows of travelling wheels 22 near the bottom of the travelling mechanism main body 21 to ensure the stability of the two rows of travelling wheels; to facilitate longitudinal rolling translation of the road wheels 22, a guide rail 23 is provided under the road wheels 22.
In order to realize the rolling translation walking along the guide rail of the cable crane, a specially-made walking track mechanism is adopted, the walking track mechanism consists of a base 41 and a cable clamp 42, the base 41 is a steel box beam, the cable clamp 42 is two semicircular cable clamp blocks, and the cable clamp blocks are fastened by screws and connected with a hoop of the main cable 10.
The steel box type track beam 31 is arranged between two adjacent travelling track mechanisms, the end of the track beam 31 is supported on the base 41, the guide rail 32 is installed on the track beam 3, the track capable of moving the cable crane with load is changed from the original main cable into the guide rail on the track beam, the center of the track moves downwards, the stress problem of deflection, distortion and deformation of the main cable 10 of the suspension bridge is solved, and meanwhile, the main cable 10 of the suspension bridge is damaged in zero.
To facilitate the translational movement of the cable crane along the guide rail 32, the traction sheave shaft assemblies 8 are arranged on the outer sides of both ends of the main body beam 1, the traction winch 13 is arranged on one bank, the traction rope 12 thereof is connected with the traction sheave shaft assemblies 8 through the steering wheel on the cable tower, and the cable crane is controlled to move along the guide rail 32 by tightening or loosening the traction rope 12.
In order to make the cable crane lift the stiff beam section 16, the hoisting wheel axle assemblies 5 are symmetrically arranged on the main beam 1, and simultaneously the hoisting winch 14 is arranged on one bank, and the hoisting cable 7 is connected with the lower hanger 6 by passing through the steering wheel on the cable tower after going out from the hoisting winch 14 and bypassing the hoisting wheel axle assemblies 5.
The traction wheel shaft assembly 8 and the hoisting wheel shaft assembly 5 are positioned on the same vertical plane, in order to prevent a traction cable 12 and a hoisting cable 7 from being wound in the air, a cable supporter wheel shaft assembly 9 is arranged on the top surface of the main body beam, the cable supporter wheel shaft assembly 9 is positioned right above the traction wheel shaft assembly 8 and the hoisting wheel shaft assembly 5, a cable supporter bearing cable 15 with the height higher than that of a main cable 10 is arranged between two towers of a suspension bridge, and the cable supporter wheel shaft assembly 9 is hung on the cable supporter bearing cable 15.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (10)
1. A walking track mechanism of a movable cable carrying crane with load is characterized by comprising a plurality of cable clamp assemblies (4) and a track assembly (3);
the cable clamp assemblies (4) are arranged at intervals along the longitudinal direction of a main cable (10) of the suspension bridge, each cable clamp assembly (4) comprises a base (41) and a cable clamp piece (42) arranged on the base (41), and the cable clamp pieces (42) are used for being connected with a hoop of the main cable (10) of the suspension bridge;
the track assembly (3) is fixed on the bases (41), and the track assembly (3) is used for the running mechanism (2) of the cable crane to run.
2. A travelling rail mechanism of a movable, on-load cable carrier according to claim 1, characterized in that the rail assembly (3) comprises a rail beam (31) and a guide rail (32) mounted on the rail beam (31).
3. The running track mechanism of a movable cable crane with load according to claim 2, characterized in that the track assemblies (3) are provided in two, two track assemblies (3) being provided on both sides of the main cable (10) of the suspension bridge.
4. A running rail mechanism of a movable cable crane with load according to any one of claims 1-3, characterized in that the cable clamp (42) is a cable clamp for fixing the main cable (10) of a suspension bridge.
5. A travelling system of a mobile, on-board, cable crane, characterized by comprising a travelling mechanism (2), and a travelling rail mechanism according to any of claims 1-4; the running mechanism (2) is arranged on the track assembly (3), and the running mechanism (2) can move back and forth along the longitudinal direction of the main cable (10).
6. The running system of the movable cable carrying crane with load according to claim 5, wherein the running mechanism (2) comprises a running mechanism main body (21) and a running member (22) arranged corresponding to the track assembly (3), and the running member (22) is arranged at the lower end of the running mechanism main body (21); the travelling mechanism main body (21) is used for being connected with a main body beam (1) of the cable crane.
7. The running system of a movable cable crane with load according to claim 6, characterized in that the track assembly (3) comprises a track beam (31) and a guide rail (32) mounted on the track beam (31), and the running member (22) is a running wheel cooperating with the guide rail (32).
8. A movable cable crane with load, comprising a main beam (1), characterized by further comprising two travelling systems according to any one of claims 5-7, the two travelling systems being respectively arranged at both ends of the main beam (1), the travelling mechanism (2) being connected to the respective ends of the main beam (1).
9. A movable, on-board cable crane according to claim 8, characterized in that it further comprises a traction mechanism for pulling the travelling mechanism (2) to and fro in the longitudinal direction of the main cable (10).
10. A movable, loadable cable crane according to claim 9, characterized in that the traction mechanism comprises a traction sheave axle assembly (8), a traction cable (12) and a traction winch (13); the traction sheave shaft assembly is characterized in that the traction sheave shaft assembly (8) is fixed on the main body beam (1), one end of the traction rope (12) is wound on the traction sheave shaft assembly (8), the other end of the traction rope (12) is wound on the traction winch (13), and the traction winch (13) is fixed on one bank of the suspension bridge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920579842.5U CN210236912U (en) | 2019-04-25 | 2019-04-25 | Movable cable carrying crane capable of carrying and walking track mechanism and walking system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920579842.5U CN210236912U (en) | 2019-04-25 | 2019-04-25 | Movable cable carrying crane capable of carrying and walking track mechanism and walking system thereof |
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| CN201920579842.5U Active CN210236912U (en) | 2019-04-25 | 2019-04-25 | Movable cable carrying crane capable of carrying and walking track mechanism and walking system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042760A (en) * | 2019-04-25 | 2019-07-23 | 湖南省中南桥梁安装工程有限公司 | One kind can be with the mobile deck unit erection gantry of load |
| CN118125310A (en) * | 2024-05-06 | 2024-06-04 | 贵州交通建设集团有限公司 | Mobile crane based on suspension bridge main cable |
| CN118125295A (en) * | 2024-05-06 | 2024-06-04 | 贵州交通建设集团有限公司 | Rail installation method of mobile crane based on suspension bridge main cable |
| CN118125311A (en) * | 2024-05-06 | 2024-06-04 | 贵州交通建设集团有限公司 | Use method of mobile crane based on suspension bridge main cable |
-
2019
- 2019-04-25 CN CN201920579842.5U patent/CN210236912U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042760A (en) * | 2019-04-25 | 2019-07-23 | 湖南省中南桥梁安装工程有限公司 | One kind can be with the mobile deck unit erection gantry of load |
| CN118125310A (en) * | 2024-05-06 | 2024-06-04 | 贵州交通建设集团有限公司 | Mobile crane based on suspension bridge main cable |
| CN118125295A (en) * | 2024-05-06 | 2024-06-04 | 贵州交通建设集团有限公司 | Rail installation method of mobile crane based on suspension bridge main cable |
| CN118125311A (en) * | 2024-05-06 | 2024-06-04 | 贵州交通建设集团有限公司 | Use method of mobile crane based on suspension bridge main cable |
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