Suspension bridge catwalk anchoring method

Abstract

The invention relates to a catwalk anchoring method for a suspension bridge, which comprises the following steps of: combining a plurality of catwalk bearing cables into one through a steering wheel, downwards leading the catwalk bearing cables to the ground to be connected with a ground winch, adjusting the overall line type and sag of the catwalk bearing cables by operating the ground winch, and realizing automatic tension balance of the catwalk bearing cables by using the steering wheel. Accurate adjustment and anchoring of the catwalk bearing cable are achieved, the construction efficiency and quality are improved, and the construction risk is reduced.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction, and more specifically to an anchoring method for a catwalk of a suspension bridge. Background Art

[0002] As an important form of long-span bridges, the catwalk, an auxiliary facility during the construction of suspension bridges, plays a crucial role. The catwalk not only provides a working platform for construction workers but also offers necessary support for key processes such as the erection of the main cable. However, the erection and adjustment of the load-bearing cables of the catwalk have always been one of the difficulties in the construction of suspension bridges.

[0003] In general construction methods, the load-bearing cables of the catwalk are composed of multiple steel wires, which are anchored in parallel to the embedded anchor boxes on the bridge piers. When erecting each load-bearing cable, it is necessary to precisely adjust the mid-span sag to a consistent state.

[0004] (Sag: The distance between the lowest point of a rope that is fixed at both ends and freely sags in the middle and the straight line connecting the two ends.) During rough adjustment, a jack is used to tension or release the long tie rod, and during fine adjustment, a jack is used to tension or release the short tie rod. Multiple load-bearing cables are required to have the same sag, with high adjustment accuracy requirements. It needs to be adjusted repeatedly for many times, and the adjustment efficiency of each cable is extremely low. Moreover, affected by the sag adjustment accuracy, the tensile forces of each load-bearing cable vary greatly in subsequent operations.

[0005] Also, the adjustment working platform is on a preset platform below the catwalk, and the risk of working at height is relatively high.

[0006] In the traditional method of erecting the load-bearing cables of the catwalk, each load-bearing cable needs to be individually adjusted for sag, which not only requires extremely high precision but also greatly increases the construction difficulty and time cost. In addition, since the adjustment working platform is usually at a high altitude, the safety risk of construction workers increases accordingly. More importantly, since it is difficult to precisely control the tensile force of each load-bearing cable, it may lead to uneven structural stress, thereby affecting the safety and durability of the entire bridge.

[0007] With the continuous development of bridge construction technology, higher requirements are put forward for the accuracy and efficiency of erecting the load-bearing cables of the catwalk. The traditional erection methods are difficult to meet the needs of modern suspension bridge construction, so it is necessary to explore new technical methods to solve this problem. Summary of the Invention

[0008] The present invention aims to overcome the defects of the prior art and provides an anchoring method for a catwalk of a suspension bridge to solve the problems of high precision requirements, complex operation, and difficult sag adjustment in the erection of the load-bearing cables of the catwalk of a suspension bridge.

[0009] To solve the above technical problems, the present invention is implemented as follows: A method for anchoring the catwalk of a suspension bridge, characterized in that: it includes combining multiple catwalk load-bearing cables into one through a turning wheel, leading them downward to the ground and connecting them to a ground winch, adjusting the overall line type and sag of the catwalk load-bearing cables by operating the ground winch, and achieving automatic tension balance of the catwalk load-bearing cables by using the turning wheel.

[0010] The method for anchoring the catwalk of a suspension bridge as described above, characterized in that the turning wheel is arranged on an anchor box on the pier, used for combining multiple catwalk load-bearing cables into one and guiding them downward to the ground and connecting them to a ground winch.

[0011] The method for anchoring the catwalk of a suspension bridge as described above, characterized in that the ground winch is used to adjust the overall line type and sag of the catwalk load-bearing cables during the erection of the catwalk load-bearing cables, and to adjust the overall line type of the catwalk load-bearing cables during the hanging stage of the catwalk to meet the needs of the erection of the main truss of the bridge.

[0012] The method for anchoring the catwalk of a suspension bridge as described above, characterized in that it further includes pre-burying a steel section anchor box and an anchor tie rod during the construction of the pier, as well as a rough adjustment anchor box and a fine adjustment anchor box. The fine adjustment anchor box is connected to the rough adjustment anchor box through an adjusting steel wire rope and is connected to the ground winch through a turning wheel, used for achieving precise adjustment of the catwalk load-bearing cables.

[0013] The method for anchoring the catwalk of a suspension bridge as described above, characterized in that ear plates are welded on both the pre-buried steel section anchor box and the rough adjustment anchor box, and the two anchor boxes are connected through a pin shaft. The rough adjustment anchor box is connected to the pre-buried steel section anchor box through an ear plate. One end of the adjusting steel wire rope is fixed to the fine adjustment anchor box, and the other end is led downward through a turning wheel welded on the anchor box to a turning wheel installed on the pier, and continues to be led downward until it reaches the ground and is connected to the ground winch, forming a complete catwalk load-bearing cable anchoring system.

[0014] A catwalk anchoring structure for a suspension bridge, characterized in that: it includes an anchor box turning wheel (1), a fine adjustment anchor beam (2), a rough adjustment anchor box (3), a suspension bridge pier (4), an anchor tie rod (5), a pre-buried steel section anchor box (6), a pin shaft (7), an ear plate (8), an overall adjustment steel wire rope (9), a catwalk load-bearing cable steel wire rope (10), a turning wheel welded on the anchor box (11), a turning wheel installed on the pier (12), a load-bearing cable adjustment ground winch (13), an adjustment cable adjustment ground winch (14), a channel steel section (15), a rope clamp (18); Pre-bury a steel section anchor box (6) and an anchor tie rod (5) inside the pier (4), and the anchor tie rod (5) fixes the pre-buried steel section anchor box (6) on the pier (4); Install a rough adjustment anchor box (3), and ear plates (8) are welded on both the rough adjustment anchor box (3) and the pre-buried steel section anchor box (6), and the two anchor boxes are connected by a pin shaft (7); Install the fine-tuning anchor box (2), thread the adjusting steel wire rope (9) through the anchor box turning wheels (1) in two anchor boxes. The anchor box turning wheels (1) are installed in the channel steel section (15). Fix the adjusting steel wire rope (9) to the fine-tuning anchor box (2) with rope clamps (18). The other end is led down through the turning wheel (11) welded on the anchor box to the turning wheel (12) installed on the pier, and continues to be led down until it is connected to the ground winch (14) on the ground. Anchor the adjusting steel wire rope (9); Install the catwalk load-bearing cable steel wire rope (10), and thread the catwalk load-bearing cable steel wire rope (10) through the fine-tuning anchor boxes (2) of two piers; Fix one end of the catwalk load-bearing cable steel wire rope (10) to the fine-tuning anchor box (2) of the pier with a rope clamp (18), and the other end is led down through the turning wheel (11) welded on the anchor box of the other side pier to the turning wheel (12) installed on the pier, and continues to be led down until it is connected to the ground winch (13) on the ground; Use the ground winch (13) to release and adjust the overall linear shape of the catwalk load-bearing cable; due to the effect of the turning wheel, the tension of each catwalk load-bearing cable steel wire rope (10) on one side will automatically adjust and balance under its own weight, and the tension and sag of each cable will automatically adjust to a consistent state; after adjustment, fix the load-bearing cable at the ground winch (13); Start the ground winch (13) to wind up the load-bearing cable (10). The total length of the catwalk load-bearing cable (10) becomes shorter. At this time, each load-bearing cable (10) will be tightened, and the lowest point in the middle will all rise upward, and the sag decreases; Start the ground winch (13) to lengthen the load-bearing cable (10). The total length of the catwalk load-bearing cable (10) becomes longer. At this time, each load-bearing cable (10) will be slack, and the lowest point in the middle will all fall downward, and the sag increases; The elevation of the lowest point in the middle of the load-bearing cable (10) in each construction stage and working condition is obtained through design calculation and is the design control data; Adjust the sag and error of the load-bearing cable (10) by lengthening or tightening it with the winch (13) according to the design data until the design requirements are met; At this time, the adjustment of the catwalk load-bearing cable is completed.

[0015] The beneficial effects of the present invention are as follows: As can be seen from the above technical solution, the present application provides a method for anchoring the catwalk of a suspension bridge. Multiple catwalk load-bearing cables are combined into one through a turning wheel and led downward to the ground and connected to a ground winch. This method greatly reduces the requirement for the sag accuracy of each load-bearing cable during the erection process because it is much simpler to control the overall combined load-bearing cable than to control multiple cables individually. When erecting the catwalk load-bearing cable, the fine adjustment of the sag of the load-bearing cable is achieved by the winch directly connected to the load-bearing cable below. By operating the ground winch to tighten or loosen the load-bearing cable, the overall line type and sag of the load-bearing cable can be easily adjusted without high-altitude operations, greatly reducing the operation difficulty and safety risks.

[0016] Due to the function of the turning wheel, each catwalk load-bearing cable on one side will automatically adjust the tension balance under its own weight, making the tension and sag of each load-bearing cable automatically adjusted to a consistent state. This not only improves the structural reliability but also reduces the problem of uneven structural stress caused by tension differences.

[0017] Before the subsequent erection of the main truss of the bridge, the catwalk needs to be suspended on the main cable. At this time, the ground winch can still be used to overall adjust the line type of the catwalk load-bearing cable. By lengthening or shortening the adjusting steel wire rope, the overall adjustment of the catwalk load-bearing cable can be easily achieved without adjusting each cable one by one, greatly improving the work efficiency.

[0018] Through the above method, not only the erection and adjustment process of the catwalk load-bearing cable are simplified, but also the construction accuracy and efficiency are improved. At the same time, due to the reduction of high-altitude operations and complex adjustment steps, the construction safety risks are also reduced.

[0019] In summary, the present invention effectively solves the problems existing in the traditional method for erecting the catwalk load-bearing cable, such as high erection accuracy requirements, complex operations, difficult sag adjustment, and low structural reliability, by introducing a turning wheel and a ground winch, combining multiple catwalk load-bearing cables into one for control, and realizing functions such as ground sag adjustment and automatic tension balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the drawings and embodiments: Figure 1 It is a schematic plan view of the anchorage of the catwalk load-bearing cable; Figure 2 It is a schematic elevation view of the anchorage of the catwalk load-bearing cable; Figure 3 It is a detailed drawing of the fine adjustment anchor box and the rough adjustment anchor box.

[0021] In the figure, 1. Anchor box steering wheel; 2. Fine-tuning anchor beam; 3. Coarse-tuning anchor box; 4. Suspension bridge pier; 5. Anchor tie rod; 6. Embedded steel anchor box; 7. Pin shaft; 8. Ear plate; 9. Overall adjustment steel wire rope; 10. Catwalk load-bearing cable steel wire rope; 11. Steering wheel welded on the anchor box; 12. Steering wheel installed on the pier; 13. Ground winch for adjusting the load-bearing cable of the catwalk; 14. Ground winch for adjusting the adjustment cable; 15. Channel steel; 18. Wire clip. Detailed implementation manners

[0022] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application. As Figures 1-3 shown: A method for anchoring a catwalk of a suspension bridge includes combining multiple catwalk load-bearing cables into one through a steering wheel, leading them downward to the ground and connecting them to a ground winch, adjusting the overall line type and sag of the catwalk load-bearing cables by operating the ground winch, and achieving automatic tension balance of the catwalk load-bearing cables by using the steering wheel.

[0023] The steering wheel is arranged on the anchor box on the pier, and is used to combine multiple catwalk load-bearing cables into one and guide them downward to the ground and connect them to the ground winch.

[0024] The ground winch is used to adjust the overall line type and sag of the catwalk load-bearing cables during the erection of the catwalk load-bearing cables, and adjust the overall line type of the catwalk load-bearing cables during the hanging stage of the catwalk to meet the needs of the erection of the main truss of the bridge.

[0025] It also includes embedding a steel anchor box and an anchor tie rod during the construction of the pier, as well as a coarse-tuning anchor box and a fine-tuning anchor box. The fine-tuning anchor box is connected to the coarse-tuning anchor box through an adjustment steel wire rope and is connected to the ground winch through a steering wheel, and is used to achieve precise adjustment of the catwalk load-bearing cables.

[0026] Ear plates are welded on both the embedded steel anchor box and the coarse-tuning anchor box. The two anchor boxes are connected through a pin shaft. The coarse-tuning anchor box is connected to the embedded steel anchor box through an ear plate. One end of the adjustment steel wire rope is fixed to the fine-tuning anchor box, and the other end is led downward through the steering wheel welded on the anchor box to the steering wheel installed on the pier, and continues to be led downward until it reaches the ground and is connected to the ground winch, forming a complete catwalk load-bearing cable anchoring system.

[0027] A catwalk anchoring structure for a suspension bridge, which includes an anchor box turning wheel 1, a fine-tuning anchor beam 2, a coarse-tuning anchor box 3, a suspension bridge pier 4, an anchor tie rod 5, a pre-embedded steel anchor box 6, a pin shaft 7, an ear plate 8, an overall adjustment steel wire rope 9, a catwalk load-bearing cable steel wire rope 10, a turning wheel 11 welded on the anchor box, a turning wheel 12 installed on the pier, a load-bearing cable adjustment ground winch 13, an adjustment cable adjustment ground winch 14, a channel steel section 15, and a wire rope clip 18; Catwalk installation stage: During pier construction, pre-embed the steel anchor box 6 and the anchor tie rod 5 inside the pier 4. The anchor tie rod 5 fixes the pre-embedded steel anchor box 6 on the pier 4; Install the coarse-tuning anchor box 3. Ear plates 8 are welded on both the coarse-tuning anchor box 3 and the pre-embedded steel anchor box 6, and the two anchor boxes are connected by a pin shaft 7; Install the fine-tuning anchor box 2. Thread the adjustment steel wire rope 9 through the anchor box turning wheels 1 inside the two anchor boxes. The anchor box turning wheels 1 are installed inside the channel steel section 15. The adjustment steel wire rope 9 is fixed to the fine-tuning anchor box 2 with a wire rope clip 18. The other end is led down through the turning wheel 11 welded on the anchor box to the turning wheel 12 installed on the pier, and continues to be led down until it reaches the ground and is connected to the ground winch 14. Anchor and adjust the steel wire rope 9; Install the catwalk load-bearing cable steel wire rope 10. Thread the catwalk load-bearing cable steel wire rope 10 through the fine-tuning anchor boxes 2 of the two piers; One end of the catwalk load-bearing cable steel wire rope 10 is fixed to the fine-tuning anchor box 2 of the pier with a wire rope clip 18, and the other end is connected to the fine-tuning anchor box 2 of the other side pier. It is led down through the turning wheel 11 welded on the anchor box to the turning wheel 12 installed on the pier, and continues to be led down until it reaches the ground and is connected to the ground winch 13; Use the ground winch 13 to slacken and adjust the overall line type of the catwalk load-bearing cable. Due to the effect of the turning wheel, the tension of each catwalk load-bearing cable steel wire rope 10 on one side will automatically adjust and balance under its own weight, and the tension and sag of each cable will automatically adjust to a consistent state; after adjustment, fix the load-bearing cable at the ground winch 13; Start the ground winch 13 and wind up the load-bearing cable 10. The total length of the catwalk load-bearing cable 10 becomes shorter. At this time, each load-bearing cable 10 will be tightened, and the lowest point in the middle will all rise upward, and the sag decreases; Start the ground winch 13 and let out the load-bearing cable 10. The total length of the catwalk load-bearing cable 10 becomes longer. At this time, each load-bearing cable 10 will be slack, and the lowest point in the middle will all fall downward, and the sag increases; The elevation of the lowest point in the middle of the load-bearing cable 10 in each construction stage and each working condition is obtained through design calculation and is the design control data; According to the design data, use the winch 13 to let out or tighten to adjust the sag and error of the load-bearing cable 10 until the design requirements are met; At this time, the adjustment of the catwalk load-bearing cable is completed.

[0028] Catwalk suspension stage: Before the erection of the main truss of the bridge, the catwalk is first re-suspended on the main cable.

[0029] Use the ground winch 14 to release the tension for overall adjustment of the alignment of the catwalk load-bearing cable. At this time, generally the sag of the catwalk load-bearing cable is released to reduce the tension of the load-bearing cable, and the catwalk is suspended on the main cable of the suspension bridge.

[0030] Start the ground winch 14, extend the adjusting steel wire rope 9, the distance between the fine-tuning anchor box 2 and the coarse-tuning anchor box 3 increases, the fine-tuning anchor box moves towards the mid-span and downwards. Since the span of the two end anchor points decreases, it drives the catwalk load-bearing cable to sag downwards, and the sag of the catwalk load-bearing cable steel wire rope 10 increases.

[0031] The elevation of the lowest point in the middle of the catwalk load-bearing cable steel wire rope 10 in each construction stage and working condition is obtained through design calculation and is the design control data.

[0032] Under the action of releasing the tension, the catwalk load-bearing cable including the fine-tuning anchor box will sag as a whole until the sag of the catwalk load-bearing cable steel wire rope 10 reaches the design control data requirements and accuracy, and then anchor and adjust the steel wire rope 9.

[0033] During the erection of the main truss of the bridge, the adjusting steel wire rope 9 will be released multiple times, and the operations are the same.

[0034] The present invention combines multiple catwalk load-bearing cables into one through a turning wheel and leads them down to the ground and connects them to the ground winch. During the erection process, the accuracy requirements for the sag of each load-bearing cable are low, and subsequent sag adjustment only needs to operate the winch on the ground to tighten and loosen the load-bearing cable to easily achieve, with simplified and convenient operation.

[0035] When erecting the catwalk load-bearing cable, the fine adjustment of the sag of the load-bearing cable is adjusted by the winch directly connected to the load-bearing cable from below.

[0036] Before the subsequent erection of the main truss of the bridge, after the catwalk is re-suspended on the main cable, the overall relaxation adjustment is carried out by the winch directly connected to the anchor steel wire rope from below.

[0037] Due to the role of the turning wheel, the sag of each load-bearing cable is consistent, the tension is evenly equal, the structural reliability is high, and the safety performance is good.

[0038] The present invention controls by combining multiple catwalk load-bearing cables into one and uses the ground winch for adjustment, greatly simplifying the erection and adjustment process of the catwalk load-bearing cable, improving the construction accuracy and efficiency. Compared with the traditional method that requires adjusting each load-bearing cable one by one, the method of the present invention significantly reduces the adjustment time and labor cost.

[0039] The traditional method for adjusting the load-bearing cables of the catwalk needs to be carried out on an aerial work platform, which poses a relatively high safety risk. The method of the present invention transfers the adjustment operation to the ground and is carried out by a ground winch, greatly reducing the risk of aerial work and improving the construction safety.

[0040] With the design of the steering wheel, each load-bearing cable on one side can automatically adjust the tension balance under its own weight, ensuring that the tension and sag of each load-bearing cable are automatically adjusted to a consistent state. This not only improves the structural reliability but also reduces the problem of uneven structural stress caused by tension differences.

[0041] Through precise adjustment and anchoring, it is ensured that the alignment and sag of the catwalk load-bearing cables meet the design requirements, thus improving the reliability of the entire suspension bridge structure. At the same time, since the tension of each load-bearing cable is uniform, the risk of structural damage caused by tension differences is also reduced.

[0042] The method of the present invention does not require additional complex equipment and structures and can be realized only by simple modification and combination on the basis of existing equipment. This not only saves resources but also reduces the construction cost. In addition, by improving the construction efficiency and reducing the rework rate, the total project cost is further reduced.

[0043] The above are only the embodiments provided by this application and are not used to limit this application. Although this application has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A method for anchoring the catwalk of a suspension bridge, characterized in that: It includes combining multiple catwalk load-bearing cables into one through deflection pulleys, leading them downward to the ground and connecting them to a ground winch, adjusting the overall line type and sag of the catwalk load-bearing cables by operating the ground winch, and achieving automatic tension balance of the catwalk load-bearing cables by using the deflection pulleys.

2. The catwalk anchoring method of the suspension bridge according to claim 1, characterized in that, The deflection pulleys are arranged on the anchor boxes on the bridge piers, used to combine multiple catwalk load-bearing cables into one, and guide them downward to the ground and connect them to a ground winch.

3. The catwalk anchoring method for a suspension bridge according to claim 1 or 2, characterized in that, The ground winch is used to adjust the overall line type and sag of the catwalk load-bearing cables during the erection of the catwalk load-bearing cables, and adjust the overall line type of the catwalk load-bearing cables during the hanging stage of the catwalk to meet the requirements of the erection of the main truss of the bridge.

4. The catwalk anchoring method of the suspension bridge according to claim 1, characterized in that, It also includes pre-burying steel anchor boxes and anchor tie rods during the construction of the bridge piers, as well as rough adjustment anchor boxes and fine adjustment anchor boxes. The fine adjustment anchor boxes are connected to the rough adjustment anchor boxes through adjusting steel wires, and are connected to the ground winch through deflection pulleys, used to achieve precise adjustment of the catwalk load-bearing cables.

5. The catwalk anchoring method of a suspension bridge according to claim 4, wherein Ear plates are welded on both the pre-buried steel anchor boxes and the rough adjustment anchor boxes. The two anchor boxes are connected by pin shafts. The rough adjustment anchor box is connected to the pre-buried steel anchor box through the ear plate. One end of the adjusting steel wire is fixed to the fine adjustment anchor box, and the other end is led downward through the deflection pulley welded on the anchor box to the deflection pulley installed on the bridge pier, and continues to be led downward until it reaches the ground and is connected to the ground winch, forming a complete anchoring system for the catwalk load-bearing cables.

6. A catwalk anchoring structure for a suspension bridge, characterized in that: It includes an anchor box deflection pulley (1), a fine adjustment anchor beam (2), a rough adjustment anchor box (3), a suspension bridge pier (4), an anchor tie rod (5), a pre-buried steel anchor box (6), a pin shaft (7), an ear plate (8), an overall adjustment steel wire (9), a catwalk load-bearing cable steel wire (10), a deflection pulley welded on the anchor box (11), a deflection pulley installed on the bridge pier (12), a load-bearing cable adjustment ground winch (13), an adjustment cable adjustment ground winch (14), a channel steel section (15), a wire clip (18); Pre-bury a steel anchor box (6) and an anchor tie rod (5) inside the bridge pier (4), and the anchor tie rod (5) fixes the pre-buried steel anchor box (6) on the bridge pier (4); Install the rough adjustment anchor box (3). Ear plates (8) are welded on both the rough adjustment anchor box (3) and the pre-buried steel anchor box (6), and the two anchor boxes are connected by a pin shaft (7); Install the fine adjustment anchor box (2). Thread the adjusting steel wire (9) through the anchor box deflection pulleys (1) inside the two anchor boxes. The anchor box deflection pulley (1) is installed inside the channel steel section (15). The adjusting steel wire (9) is fixed to the fine adjustment anchor box (2) with a wire clip (18). The other end is led downward through the deflection pulley (11) welded on the anchor box to the deflection pulley (12) installed on the bridge pier, and continues to be led downward until it reaches the ground and is connected to the ground winch (14). Anchor and adjust the steel wire (9); Install the catwalk load-bearing cable steel wire (10), and thread the catwalk load-bearing cable steel wire (10) through the fine adjustment anchor boxes (2) of the two bridge piers; One end of the catwalk load-bearing cable steel wire (10) is fixed to the fine adjustment anchor box (2) of the bridge pier with a wire clip (18), and the other end is connected to the fine adjustment anchor box (2) of the other side bridge pier. It is led downward through the deflection pulley (11) welded on the anchor box to the deflection pulley (12) installed on the bridge pier, and continues to be led downward until it reaches the ground and is connected to the ground winch (13); Use the ground winch (13) to release the tension to adjust the overall alignment of the catwalk load-bearing cable; due to the action of the turning wheel, the tension of each catwalk load-bearing cable wire rope (10) on one side will automatically adjust and balance under its own weight, and the tension and sag of each cable will automatically adjust to a consistent state; after the adjustment is completed, fix the load-bearing cable at the ground winch (13). Start the ground winch (13) and wind up the load-bearing cable (10). The total length of the catwalk load-bearing cable (10) becomes shorter. At this time, each load-bearing cable (10) will be tightened, the lowest point in the middle will be lifted upward, and the sag will decrease. Start the ground winch (13) and let out the load-bearing cable (10). The total length of the catwalk load-bearing cable (10) becomes longer. At this time, each load-bearing cable (10) will be slack, the lowest point in the middle will fall downward, and the sag will increase. The elevation of the lowest point in the middle of the load-bearing cable (10) in each construction stage and working condition is obtained through design calculation and is the design control data. According to the design data, use the winch (13) to let out or tighten to adjust the sag and error of the load-bearing cable (10) until the design requirements are met. At this time, the adjustment of the catwalk load-bearing cable is completed.

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