A method and system for intelligent control of the catwalk alignment of an ultra-long span suspension bridge

Abstract

This invention provides an intelligent control method and system for the catwalk alignment of ultra-long span suspension bridges. The method includes: calculating the first release amount based on predicted temperature difference for day and night adjustment; and dynamically adjusting the catwalk alignment during main cable traction based on real-time temperature and traction length to ensure a constant distance between the catwalk working surface and the main cable, avoiding interference. The system includes a catwalk relative alignment measurement system, a catwalk load-bearing cable release and take-up system, a handrail cable release and take-up system, a gantry load-bearing cable release and take-up system, and an intelligent control system. The measurement system monitors the vertical distance between the main cable and the catwalk; each release and take-up system adjusts the length of the catwalk cables; and the intelligent control system collects data and achieves intelligent synchronous control of the catwalk cable release and take-up. This invention achieves self-sensing and self-adjustment of the catwalk alignment, solving the problem of interference with the main cable caused by temperature influence and large changes in the alignment of lightweight, high-strength catwalks.

Description

Technical Field

[0001] This invention relates to the field of catwalk alignment control technology, specifically to an intelligent control method and system for the alignment of catwalks in ultra-long span suspension bridges. Background Technology

[0002] The catwalk serves as the operational platform for the main cable erection of a suspension bridge. With the load-bearing cables positioned beneath the main cables, construction workers perform crucial tasks such as main cable traction, strand adjustment, saddle alignment, cable fastening, cable clamp and suspender installation, box girder hoisting, and main cable wire wrapping protection. As suspension bridge spans continue to increase, the excessive weight of the catwalk structure leads to an excessive number of load-bearing cables. Traditional steel wire rope catwalks are economically inefficient, and fiber rope catwalk structures will be the primary type of load-bearing cable for future long-span suspension bridges. However, this fiber rope catwalk structure faces two problems: first, fiber rope catwalks are temperature-inert materials, and steel main cables are prone to interference with the catwalk due to changes in ambient temperature; second, fiber rope catwalks are lightweight and have low gravitational stiffness, making it easy for the catwalk alignment to interfere with the main cable alignment during the traction process. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an intelligent control method and system for the catwalk alignment of ultra-long span suspension bridges. This method enables the catwalk alignment to be self-sensing and self-adjusting, and solves the problem of interference with the main cable caused by temperature influence and large changes in the alignment of lightweight, high-strength catwalks.

[0004] To address the aforementioned technical problems, in a first aspect, the present invention provides a method for intelligent control of the catwalk alignment of an ultra-long span suspension bridge, comprising: Obtain the predicted maximum ambient temperature difference for the day. According to temperature difference Calculation of the influence of the main cable's mid-span deflection on the first release of the catwalk cable. Place the cat rope ; During the main cable traction process, the distance h between the catwalk and the main cable is monitored in real time. When h is less than H, the second release of the catwalk cable is calculated based on the current traction length of the main cable. Place the cat rope Where H is the minimum allowable distance between the catwalk and the main cable.

[0005] In some embodiments, based on temperature difference The effect of adjusting the catenary cable tension on the mid-span deflection of the main cable includes: A finite element model of the main cable was established, and the change in mid-span deflection of the main cable was obtained through rise and fall sensitivity analysis. With temperature change relation = ; A finite element model of the catwalk is established, and the stress-free length variation is established by changing the stress-free length variation of the catwalk cables. Change in mid-span deflection of the catwalk relation = ; make = The stress-free length change was obtained. With temperature change relation = ; calculate = stress-free length change The stress-free length change The first release tensor of the catpath .

[0006] In some embodiments, the catwalk cable is released This includes: setting up the catwalk rope before sunrise on the same day. The catwalk cable will be tensioned after sunset that day. .

[0007] In some embodiments, the ambient temperature is monitored in real time during the main cable traction process; If the ambient temperature T is higher than the predicted maximum temperature for the day Then according to the temperature difference Recalculate the first release of the catwalk cable. The release amount of the catwalk cable is adjusted in real time. This represents the predicted minimum temperature for that day.

[0008] In some embodiments, the second release of the catwalk cable is calculated based on the current traction length of the main cable. include: A finite element model of the catwalk was established to simulate the changes in the catwalk's alignment during the main cable traction process, and the change in mid-span deflection of the catwalk was obtained. Relationship with the main cable's traction length L on the catwalk = ; By changing the change in the stress-free length of the catwalk cable, the stress-free length change is established. Change in mid-span deflection of the catwalk relation = ; according to = and = The stress-free length change was obtained. Relationship with main cable traction length L = ; Calculate the stress-free length change based on the current traction length of the main cable. The stress-free length change The second release tensor of the catpath .

[0009] In some embodiments, the change in catwalk alignment during main cable traction is simulated to obtain the change in catwalk mid-span deflection. Relationship with the main cable's traction length L on the catwalk = include: Divide the catwalk span M into n equal parts and analyze the main cable traction to each part. , , ... Changes in the catwalk line shape: Let k=1, and apply the main cable weight to the catwalk finite element model. The range of the main cable weight application is from the start of the catwalk to a distance from the start of the catwalk. Calculate the change in mid-span deflection of the catwalk within the specified range. The main cable is pulled from the start to the end of the catwalk. Calculate the correction factor = ; Let k = k + 1, and repeat this step until k = n; Obtain the change in mid-span deflection of the catwalk Relationship with the main cable's traction length L on the catwalk = .

[0010] In some embodiments, according to = and = The stress-free length change was obtained. Relationship with main cable traction length L = include: = .

[0011] In some embodiments, during the release or tensioning of the catwalk cable, the cable force is detected in real time. If the cable force exceeds a preset upper limit, the release or tensioning is stopped and an alarm is triggered.

[0012] Secondly, the present invention provides an intelligent control system for implementing the aforementioned intelligent control method for the alignment of the catwalk of a super-long span suspension bridge, the intelligent control system being used for: Based on the predicted maximum ambient temperature difference for the day Calculate the first release of the catwalk cable. According to the first tensor The catwalk cable is released and the ambient temperature is monitored in real time. Determine if the ambient temperature T is greater than the predicted maximum temperature for the day. If so, then recalculate the first release tensor of the catwalk cable. The release amount of the catwalk cable is adjusted in real time.

[0013] In some embodiments, the intelligent control system is used for: The distance between the catwalk and the main cable (1) is obtained in real time. It is determined whether the distance between the catwalk and the main cable (1) is greater than the distance threshold. If so, the second release amount of the catwalk cable is calculated based on the traction length L of the main cable (1). Place the cat rope .

[0014] In some embodiments, the intelligent control system is used for: The catwalk cable tension is acquired in real time, and it is determined whether the tension exceeds the tension threshold. If so, the adjustment of the catwalk cable is stopped immediately and an alarm is issued.

[0015] Thirdly, the present invention provides an intelligent control system for implementing the aforementioned intelligent control method for the alignment of the catwalk of a super-long span suspension bridge, comprising: The catwalk relative alignment measurement system includes multiple rangefinders, which are used to measure the relative vertical distance between the main cable and the catwalk at different locations. The catwalk load-bearing cable retraction system is used to adjust the length of the catwalk load-bearing cable. A handrail cable retraction system, wherein the handrail cable retraction system is used to adjust the length of the handrail cable; A gantry load-bearing cable retraction system, wherein the gantry load-bearing cable retraction system is used to adjust the length of the gantry load-bearing cable; The intelligent control system is used to collect data, calculate the release amount of the catwalk cable based on the collected data, and control the release and retraction of the catwalk cable through the catwalk load-bearing cable release and retraction system, the handrail cable release and retraction system, and the gantry load-bearing cable release and retraction system; wherein, the catwalk cable includes the catwalk load-bearing cable, the handrail cable, and the gantry load-bearing cable.

[0016] In some embodiments, a plurality of the rangefinders are arranged at equal intervals along the longitudinal direction of the bridge, with one end of the rangefinder fixed to the installed main cable and the other end of the rangefinder installed on the working surface of the catwalk.

[0017] In some embodiments, the intelligent control system is used for: Data acquisition: Collect data on the distance between the main cable and the catwalk, ambient temperature, catwalk load-bearing cable tension, handrail cable tension, gantry load-bearing cable tension, catwalk load-bearing cable release and release system release and release values, handrail cable release and release system release and release values, and gantry load-bearing cable release and release system release and release values, as detected by the rangefinder. Data processing and analysis: Analyze the threshold judgment of ambient temperature difference, distance between catwalk and main cable, and the cable force and threshold judgment of catwalk load-bearing cable, handrail cable and gantry load-bearing cable; Intelligent control: Based on the threshold of ambient temperature difference and the distance between the catwalk and the main cable, the synchronous tensioning control of the catwalk load-bearing cable tensioning system, the handrail cable tensioning system, and the gantry load-bearing cable tensioning system is determined.

[0018] The beneficial effects of this invention are as follows: 1. This invention addresses the problem of temperature inertia differences by establishing a finite element model of the main cable and the catwalk, accurately predicting and calculating the changes in the main cable's shape caused by environmental temperature differences, and accordingly actively releasing the catwalk cable before sunrise and actively tensioning it after sunset to achieve advance compensation. This ensures that the fiber rope catwalk and the steel main cable can always maintain a safe distance, completely avoiding the risk of structural interference caused by asynchronous thermal expansion and contraction. To address the issue of alignment interference caused by low gravitational stiffness, the system can dynamically calculate the changes in the catwalk alignment based on the real-time monitored main cable traction length during the main cable traction process, and intelligently adjust the length of the catwalk cable. This ensures that the working surface of the catwalk always follows the changes in the main cable alignment, effectively preventing collisions between the catwalk and the main cable being tractioned due to catwalk deformation, and ensuring the smoothness and safety of the main cable traction operation.

[0019] 2. This invention integrates data from multiple sensors, such as distance measurement, temperature, cable force, and take-up / deployment volume, and performs comprehensive analysis by an intelligent control system. This achieves closed-loop control from environmental perception to precise execution, changing the extensive mode that relies on human experience and manual operation.

[0020] 3. This invention not only includes pre-control based on predicted temperature difference, but also has the ability to dynamically correct according to real-time temperature and traction progress during construction, ensuring the timeliness and accuracy of control.

[0021] 4. This invention can simultaneously release or tension the catwalk load-bearing cables, handrail cables, and gantry load-bearing cables, ensuring the coordinated deformation of the overall catwalk structure, maintaining the stability and smoothness of its working surface, and providing a safer and more stable construction platform for bridge workers. Attached Figure Description

[0022] Figure 1 This is an elevation layout diagram of the suspension bridge of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3This is a plan view of the suspension bridge of the present invention; Figure 4 This is a cross-sectional view of the cat walkway of the present invention; Figure 5 This is an elevation layout diagram of the cable tower of the present invention; Figure 6 This is the control flowchart of the present invention.

[0023] Attached reference numerals: 1. Main cable; 2. Upstream catwalk; 3. Downstream catwalk; 4. Catwalk load-bearing cable; 5. Handrail cable; 6. Gantry load-bearing cable; 7. Rangefinder; 8. Catwalk load-bearing cable retraction system; 9. Handrail cable retraction system; 10. Gantry load-bearing cable retraction system. Detailed Implementation

[0024] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] like Figure 1 The image shown is an elevation view of a suspension bridge. Figures 2 to 4 As shown, the catwalk of the suspension bridge includes an upstream catwalk 2 and a downstream catwalk 3. Catwalk load-bearing cables 4, handrail cables 5, and gantry load-bearing cables 6 are installed on the catwalk. The main cable 1 passes through the catwalk, and the distance between each point on the centerline of the working surface of the catwalk and the main cable 1 is approximately equal.

[0026] This invention provides an intelligent control system for the catwalk alignment of an ultra-long span suspension bridge, comprising a catwalk relative alignment measurement system, a catwalk load-bearing cable retraction and deployment system 8, a handrail cable retraction and deployment system 9, a gantry load-bearing cable retraction and deployment system 10, and an intelligent control system. The catwalk relative alignment measurement system, the catwalk load-bearing cable retraction and deployment system 8, the handrail cable retraction and deployment system 9, and the gantry load-bearing cable retraction and deployment system 10 are all existing equipment.

[0027] like Figure 2 , 4 As shown, the catwalk relative alignment measurement system includes multiple rangefinders 7, which are arranged at equal intervals along the longitudinal direction of the bridge. One end of each rangefinder 7 is fixed to the installed main cable 1, and the other end is installed on the working surface of the catwalk. The multiple rangefinders 7 are used to measure the relative vertical distance between the installed main cable 1 and the catwalk at different locations.

[0028] like Figure 5As shown, the two ends of the catwalk load-bearing cable retraction system 8 are respectively connected to the tower anchoring device and the catwalk load-bearing cable 4, and are used to adjust the length of the catwalk load-bearing cable 4; the two ends of the handrail cable retraction system 9 are respectively connected to the tower anchoring device and the handrail cable 5, and are used to adjust the length of the handrail cable 5; the two ends of the gantry load-bearing cable retraction system 10 are respectively connected to the tower anchoring device and the gantry load-bearing cable 6, and are used to adjust the length of the gantry load-bearing cable 6.

[0029] Intelligent control systems are used for: Data acquisition: Collect the distance between the main cable 1 and the catwalk detected by the rangefinder 7, the ambient temperature, the tension data of the catwalk load-bearing cable 4, the tension data of the handrail cable 5, the tension data of the gantry load-bearing cable 6, the release and retraction values ​​of the catwalk load-bearing cable 4 release system, the release and retraction values ​​of the handrail cable release system 9, and the release and retraction values ​​of the gantry load-bearing cable release system 10. Data processing and analysis: Analyze the environmental temperature difference, the threshold judgment of the distance between the catwalk and the main cable 1, and the cable force and threshold judgment of the catwalk load-bearing cable 4, handrail cable 5 and gantry load-bearing cable 6; Intelligent control: Based on the ambient temperature difference and the threshold of the distance between the catwalk and the main cable 1, the synchronous tensioning control of the catwalk load-bearing cable 4 tensioning system, the handrail cable tensioning system 9 and the gantry load-bearing cable tensioning system 10 is determined.

[0030] like Figure 6 As shown, this invention provides a method for intelligent control of the catwalk alignment of an ultra-long span suspension bridge, comprising: S1. Obtain the predicted maximum ambient temperature difference for the day. According to temperature difference Calculation of the influence of the mid-span deflection of main cable 1 on the first release of the catwalk cable. The catwalk rope was released before sunrise that day. The catwalk cable will be tensioned after sunset that day. ; According to temperature difference The influence of the mid-span deflection of main cable 1 on the adjustment of the catwalk cable tension includes: A finite element model of main cable 1 was established, and the change in deflection at mid-span of main cable 1 was obtained through rise and fall sensitivity analysis. With temperature change relation = ; Deflection change at mid-span of main cable The degree of change is related to the temperature. The relationship between the two varies depending on the temperature range, but it is generally linear. Specifically: Based on the local historical lowest temperature and the highest local temperature Determine the calculation temperature range [ , Based on the change in deflection at mid-span of the main cable... The sensitivity to temperature levels, within a temperature range [ , Divide it into m equal parts, that is, divide it into [ , ), [ , ), ……, [ , ], C= Simulate the change in deflection of the main cable at mid-span within various temperature ranges. The corresponding correction coefficient b can be obtained from the effect. , ... Finally, the deflection change at mid-span of the main cable was obtained. With temperature change Relationship: = .

[0031] A finite element model of the catwalk is established, and the stress-free length variation is established by changing the stress-free length variation of the catwalk cables. Change in mid-span deflection of the catwalk relation = ; Stress-free length change Change in mid-span deflection of the catwalk The relationship represents the influence of the stress-free expansion and contraction of the catwalk cable on the mid-span deflection of the catwalk, and the corresponding functional relationship can be obtained by fitting. make = The stress-free length change was obtained. With temperature change relation = ; calculate = stress-free length change The stress-free length change The first release tensor of the catpath .

[0032] It is understandable that for a catwalk structure using fiber rope, the amount of temperature deformation is negligible. Therefore, the catwalk can be directly adjusted according to the amount of temperature deformation of the main cable 1, thus avoiding interference between the main cable 1 and the catwalk caused by temperature.

[0033] S2. During the traction process of the main cable 1, the catwalk cable is adjusted in real time according to the ambient temperature and the current traction length of the main cable 1.

[0034] Step S2 includes: S21. During the traction of main cable 1, the ambient temperature is monitored in real time. If the ambient temperature T is higher than the predicted maximum temperature for the day Then according to the temperature difference Recalculate the first release of the catwalk cable. The release amount of the catwalk cable is adjusted in real time. This is the predicted minimum temperature for the day. That is, using the first expansion in step S1. With the first expansion in step S21 The difference is used to correct the release amount of the catwalk cable in real time.

[0035] S22. Real-time detection of the distance h between the catwalk and the main cable 1. When h is less than H, calculate the second release of the catwalk cable based on the current traction length of the main cable 1. Place the cat rope Where H is the minimum allowable distance between the catwalk and the main cable 1, and the current traction length of the main cable 1 represents the length of the main cable 1 pulled from one end of the catwalk to the other end.

[0036] Calculate the second release of the catwalk cable based on the current traction length of main cable 1. include: S221. Establish a finite element model of the catwalk to simulate the changes in the catwalk alignment during the traction of main cable 1, and obtain the change in mid-span deflection of the catwalk. The relationship between the main cable 1 and the traction length L on the catwalk = ; relational expression = The calculation method is as follows: Divide the catwalk span M into n equal parts and analyze the traction of the main cable 1 to each part. , , ... Changes in the catwalk line shape: Let k=1, and apply the weight of main cable 1 to the finite element model of the catwalk. The range of the applied weight of main cable 1 is from the starting point of the catwalk to a distance from the starting point of the catwalk. Calculate the change in mid-span deflection of the catwalk within the specified range. The traction direction of the main cable 1 is from the start point to the end point of the catwalk. Calculate the correction factor = ; Let k = k + 1, and repeat this step until k = n; Obtain the change in mid-span deflection of the catwalk The relationship between the main cable 1 and the traction length L on the catwalk = .

[0037] Because fiber rope catwalks are lightweight and have low gravitational stiffness, their alignment changes significantly during the gradual traction of the main cable 1. This invention addresses this issue by reducing the change in mid-span deflection of the catwalk. The relationship between the main cable 1 and the traction length L on the catwalk can be considered linear within a very small range. However, within different traction length ranges, the linear parameters (i.e., correction coefficients) between the two remain constant. The smaller the value of n, the more accurate the calculation result.

[0038] S222. By changing the change in the stress-free length of the catwalk cable, establish the stress-free length change. Change in mid-span deflection of the catwalk relation = ; S223, according to = and = The stress-free length change was obtained. Relationship with the main cable 1 traction length L = ; Calculate the stress-free length change based on the current traction length of main cable 1. The stress-free length change The second release tensor of the catpath .

[0039] S224. During the release or tensioning of the catwalk cable, the cable tension is monitored in real time. If the cable tension exceeds the preset upper limit, the release or tensioning is stopped and an alarm is triggered.

[0040] It should be noted that the above-mentioned catwalk cables include the catwalk load-bearing cable 4, the handrail cable 5, and the gantry load-bearing cable 6. During the release or tensioning process, the catwalk load-bearing cable 4, the handrail cable 5, and the gantry load-bearing cable 6 are released or tensioned simultaneously by the same amount.

[0041] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for intelligent control of the catwalk alignment of an ultra-long span suspension bridge, characterized in that: include: Obtain the predicted maximum ambient temperature difference for the day. According to temperature difference Calculation of the influence of the mid-span deflection of the main cable (1) on the first release of the catwalk cable. Place the cat rope ; During the traction process of the main cable (1), the distance h between the catwalk and the main cable (1) is detected in real time. When h is less than H, the second release of the catwalk cable is calculated based on the current traction length of the main cable (1). Place the cat rope Where H is the minimum allowable distance between the catwalk and the main cable (1); According to temperature difference Calculation of the influence of the mid-span deflection of the main cable (1) on the first release of the catwalk cable. include: A finite element model of the main cable (1) was established, and the change in mid-span deflection of the main cable (1) was obtained through rise and fall sensitivity analysis. With temperature change relation = ; A finite element model of the catwalk is established, and the stress-free length variation is established by changing the stress-free length variation of the catwalk cables. Change in mid-span deflection of the catwalk relation = ; make = The stress-free length change was obtained. With temperature change relation = ; calculate = stress-free length change The stress-free length change The first release tensor of the catpath ; Release the catwalk cable This includes: setting up the catwalk rope before sunrise on the same day. The catwalk cable will be tensioned after sunset that day. .

2. The intelligent control method for the catwalk alignment of a super-long span suspension bridge according to claim 1, characterized in that: During the traction of the main cable (1), the ambient temperature is monitored in real time; If the ambient temperature T is higher than the predicted maximum temperature for the day Then according to the temperature difference Recalculate the first release of the catwalk cable. The release amount of the catwalk cable is adjusted in real time. This represents the predicted minimum temperature for that day.

3. The intelligent control method for the catwalk alignment of a super-long span suspension bridge according to claim 1 or 2, characterized in that: Calculate the second release of the catwalk cable based on the current traction length of the main cable (1). include: A finite element model of the catwalk was established to simulate the change in catwalk alignment during the traction of the main cable (1), and the change in catwalk mid-span deflection was obtained. The relationship between the main cable (1) and the traction length L on the catwalk. = ; By changing the change in the stress-free length of the catwalk cable, the stress-free length change is established. Change in mid-span deflection of the catwalk relation = ; according to = and = The stress-free length change was obtained. The relationship between the main cable (1) and the traction length L = ; Calculate the stress-free length change based on the current traction length of the main cable (1). The stress-free length change The second release tensor of the catpath .

4. The intelligent control method for the catwalk alignment of a super-long span suspension bridge according to claim 3, characterized in that: The change in catwalk alignment during the simulation of main cable (1) traction process was used to obtain the change in catwalk mid-span deflection. The relationship between the main cable (1) and the traction length L on the catwalk. = include: Divide the catwalk span M into n equal parts and analyze the main cable (1) pulling to each part. , , ... Changes in the catwalk line shape: Let k=1, and apply the weight of the main cable (1) to the finite element model of the catwalk. The range of the applied weight of the main cable (1) is from the starting point of the catwalk to a distance from the starting point of the catwalk. Calculate the change in mid-span deflection of the catwalk within the specified range. Among them, the traction direction of the main cable (1) is from the starting point of the catwalk to the ending point of the catwalk; Calculate the correction factor = ; Let k = k + 1, and repeat this step until k = n; Obtain the change in mid-span deflection of the catwalk The relationship between the main cable (1) and the traction length L on the catwalk. = .

5. The intelligent control method for the catwalk alignment of a super-long span suspension bridge according to claim 1, characterized in that: During the release or tensioning of the catwalk cable, the cable tension is monitored in real time. If the cable tension exceeds the preset upper limit, the release or tensioning is stopped and an alarm is triggered.

6. An intelligent control system for implementing the intelligent control method for the catwalk alignment of a super-long span suspension bridge as described in any one of claims 1 to 5, characterized in that: The intelligent control system is used for: Based on the predicted maximum ambient temperature difference for the day Calculate the first release of the catwalk cable. According to the first tensor The catwalk cable is released and the ambient temperature is monitored in real time. Determine if the ambient temperature T is greater than the predicted maximum temperature for the day. If so, then recalculate the first release tensor of the catwalk cable. The release amount of the catwalk cable is adjusted in real time.

7. The intelligent control system according to claim 6, characterized in that: The intelligent control system is used for: The distance between the catwalk and the main cable (1) is obtained in real time. It is determined whether the distance between the catwalk and the main cable (1) is greater than the distance threshold. If so, the second release amount of the catwalk cable is calculated based on the traction length L of the main cable (1). Place the cat rope .

8. The intelligent control system according to claim 6, characterized in that: The intelligent control system is used for: The catwalk cable tension is acquired in real time, and it is determined whether the tension exceeds the tension threshold. If so, the adjustment of the catwalk cable is stopped immediately and an alarm is issued.

9. An intelligent control system for implementing the intelligent control method for the catwalk alignment of a super-long span suspension bridge as described in any one of claims 1 to 5, characterized in that: include: The catwalk relative alignment measurement system includes multiple rangefinders (7), which are used to measure the relative vertical distance between the main cable (1) installed at different locations and the catwalk. Catwalk load-bearing cable retraction system (8), the catwalk load-bearing cable retraction system (8) is used to adjust the length of the catwalk load-bearing cable (4); The handrail cable retraction system (9) is used to adjust the length of the handrail cable (5); The gantry load-bearing cable retraction system (10) is used to adjust the length of the gantry load-bearing cable (6); The intelligent control system is used to collect data, calculate the release amount of the catwalk cable based on the collected data, and control the release and release of the catwalk cable through the catwalk load-bearing cable release and release system (8), the handrail cable release and release system (9), and the gantry load-bearing cable release and release system (10); wherein the catwalk cable includes the catwalk load-bearing cable (4), the handrail cable (5), and the gantry load-bearing cable (6).

10. The intelligent control system according to claim 9, characterized in that: Multiple rangefinders (7) are arranged at equal intervals along the longitudinal direction of the bridge. One end of the rangefinder (7) is fixed on the installed main cable (1), and the other end of the rangefinder (7) is installed on the working surface of the catwalk.

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