Installation method of tensioning type ICCP system for horizontally building ultrahigh jacket

Abstract

The invention provides an installation method of a tensioning type ICCP system for horizontally building an ultrahigh jacket, which comprises the following steps of: setting a plurality of middle anchor points on an installation path according to the installation length of a composite cable, segmenting a slip rope steel wire rope according to the middle anchor points, and performing deflection analysis on each segment to obtain a slip rope overall deflection diagram; the slip rope overall deflection diagram is imported into the jacket model for three-dimensional space comparison, and an overall deflection three-dimensional comparison diagram is obtained; a slip rope steel wire rope and a traction rope are preset on the installation path of the jacket, the traction rope is used for pulling the composite cable to move along the slip rope, and the actual deflection value and tension value of the slip rope steel wire rope and the actual deflection value of the composite cable when the composite cable sequentially passes through the middle anchor points are monitored; mounting parameters are adjusted according to the actual deflection value and tension value of the slip rope steel wire rope and the actual deflection value of the composite cable, so that the distance error between the composite cable and the mounting path is smaller than a set threshold value. According to the invention, dynamic monitoring of the installation process of the composite cable is realized, and the installation design of subsequent engineering is optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of conductor frame composite cable installation, and in particular relates to a tensioning ICCP system installation method for horizontally building an ultra-high conductor frame. Background Art

[0002] The tensioned impressed current cathodic protection system (hereinafter referred to as the tensioned ICCP system) is an impressed current cathodic protection system for pile-fixed conductor frame foundations. It uses a composite cable-electrode system with integrated auxiliary anodes and reference electrodes as its core component. It can be tensioned and fixed inside the conductor frame through the anchoring structures at the head and tail of the conductor frame, realizing the distributed integrated installation of auxiliary anodes and reference electrodes.

[0003] At present, the tensioned ICCP technology has become the main technical means for cathodic protection of offshore pile-based fixed jacket platforms. It is not only used to solve the urgent need for extending the cathodic protection of in-service deepwater jackets, but also promoted and applied in the full-life cathodic protection of newly built jacket platforms. For example, in the Chinese patent "A composite cable installation method for a newly built jacket" with application number CN202210406529.8, it is disclosed that a steel wire rope is used as a guide cable for installing a composite cable, and a winch is used to pull the composite cable into place, which is suitable for the installation of tensioned ICCP composite cables in the onshore horizontal construction stage of deepwater jackets. However, the patent does not take into account the actual deflection values ​​of the composite cable and the cable wire rope during the actual construction process, and does not verify the design of the original deflection diagram based on the actual measurement parameters. Especially in the installation scenario of the tensioned ICCP system of the ultra-high jacket, if there is a lack of effective monitoring during the installation process of the entire composite cable, it will directly affect the installation results.

[0004] Therefore, developing a set of engineering technologies that are more practical, safer, more reliable, more efficient, and more economical, and breaking through the important technical barriers of the onshore installation of new flexible jacket tensioned ICCPs, is of great significance to reaching international and industry-leading levels. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a method for installing a tensioned ICCP system for a horizontally constructed ultra-high conductor rack, which is mainly used to solve the problems in the prior art of installing a tensioned ICCP system for an ultra-high conductor rack, such as being unable to adjust the construction process according to actual monitoring data, and lack of monitoring affecting construction efficiency and results.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a method for installing a tensioned ICCP system for horizontally constructing an ultra-high conductor frame, comprising:

[0008] According to the installation length of the composite cable, several intermediate anchor points are set on the installation path. The cable wire rope is segmented according to the intermediate anchor points. The deflection analysis is performed on each segment to obtain the overall deflection diagram of the cable. The overall deflection diagram of the cable is imported into the conductor frame model for three-dimensional spatial comparison to obtain a three-dimensional comparison diagram of the overall deflection.

[0009] Preset the cable wire rope and traction rope on the installation path of the conductor frame, use the traction rope to pull the composite cable to move along the cable, and monitor the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable when the composite cable passes through the intermediate anchor points in sequence;

[0010] The installation parameters are adjusted according to the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable, so that the distance error between the composite cable and the installation path is less than a set threshold.

[0011] In some embodiments, when performing deflection analysis on each segment to obtain the overall deflection diagram of the zipline, the process includes:

[0012] The simulation method is used to simulate the zipline wire rope using the Line model unit in the Orcaflex software package. The parameters of the outer diameter, unit length mass, and axial stiffness of the zipline wire rope are defined in the Line model unit. The rope length is corrected according to the tension at both ends of the zipline wire rope, and the deflection value of the zipline wire rope is calculated to obtain the first deflection result.

[0013] In some embodiments, the deflection value of the cable wire rope is analyzed and calculated using the formula method and the finite element method, respectively, to obtain the second deflection result and the third deflection result;

[0014] The average deflection value of the second deflection result and the third deflection result is calculated, and the error between the first deflection result and the average deflection value is calculated. When the error is less than 1%, the overall deflection diagram of the cableway is formulated using the first deflection result.

[0015] In some embodiments, after obtaining the overall deflection diagram of the zip line, the method further includes:

[0016] Record the arrangement order of the current intermediate anchor points, define the extreme parameters under several extreme conditions, and use the simulation method to iteratively calculate the deflection of the cable wire rope and composite cable due to their own weight;

[0017] When the pre-tension of the steel wire rope of the zip line is not greater than 100 kN, a combination with the smallest deflection value and the least number of intermediate anchor points is selected as the final intermediate anchor point combination, and the overall deflection diagram of the zip line is formulated based on this.

[0018] In some embodiments, when monitoring the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable when the composite cable passes through the intermediate anchor points in sequence, it also includes:

[0019] According to the distribution of the final intermediate anchor point combination, a corresponding drone detection module is set at each intermediate anchor point, and the drone detection module is used to hover at a fixed point in the air to collect the deflection of the cable wire rope and / or the composite cable. By hanging markers on the cable wire rope and / or the composite cable, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are captured, detected and recorded when the composite cable passes through each intermediate anchor point in turn;

[0020] The actual deflection value and tension value of the zipline wire rope and the actual deflection value of the composite cable are calibrated into the overall deflection three-dimensional comparison chart to evaluate and analyze the deviation value. According to the comparison between the deviation value and the deviation safety factor, the installation parameters are adjusted.

[0021] In some embodiments, when the composite cable is being pulled, the actual deflection value of the zip line steel wire rope is measured by measuring a small light source arranged on the zip line steel wire rope;

[0022] When the composite cable is fully pulled into place, measure the final cable wire deflection;

[0023] After the measurement is completed, the small light source lamp is recovered through the recovery zipline to complete the measurement.

[0024] In some embodiments, tension sensors are connected to both ends of the cable wire rope to detect the tension value of the tension sensor;

[0025] Start the cable traction winch, and when the pre-tensioning force at both ends of the cable wire rope reaches 50 kN, brake the winch, observe the cable state of the cable wire rope for 5 minutes, and test the winch torque sensor and cable tension sensor at the same time;

[0026] After finding no abnormalities, start the zipline traction winch again, increase the pre-tensioning force of the zipline wire rope to 100kN, and confirm that the zipline wire rope reaches the theoretical height position at each of the intermediate anchor points.

[0027] In some embodiments, when calibrating the overall deflection three-dimensional comparison diagram, it also includes:

[0028] The composite cable is pulled along the installation direction. When passing through the first intermediate anchor point, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are compared with the first deflection result obtained by the simulation method, and the deviation value is obtained by evaluation and analysis;

[0029] If the deviation value is less than or equal to the deviation safety factor, continue to pull the composite cable;

[0030] If the deviation value is greater than the deviation safety factor, stop releasing the protective wire rope, increase the reverse force of the composite cable and reduce the actual deflection value of the composite cable.

[0031] In some embodiments, every time the composite cable is pulled forward 15m, the winch is controlled to stop moving, and then the composite cable drum reducer is used to control the tightening and releasing of the composite cable to adjust the actual deflection value of the composite cable to within the first deviation range that meets the first deflection result.

[0032] In some embodiments, during the traction process of the composite cable, when the connection structure between the composite cable and the zipline wire rope reaches the middle anchor point, the composite cable stops being pulled, and the operator at the middle anchor point uses a set of hand winches on the sling and the zipline wire rope anchor point shackle to cover the zipline wire rope behind the connection structure, adjusts the hand winch to lift the zipline wire rope, adjusts the installed hand winch to lower the zipline wire rope, loosens the zipline in front of the connection structure, removes the shackle bolt in front of the connection structure to release the zipline wire rope, adjusts the hand winch behind the connection structure to move the zipline wire rope to the theoretical line position, and then starts the zipline traction winch to continue traction of the composite cable.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] In order to solve the technical difficulties of impressed current cathodic protection system (ICCP) in the horizontal installation of newly built conductor frame on land, a new installation scheme using cable was studied. In order to solve the feasibility of ICCP composite cable installation scheme for deepwater horizontal conductor frame, the monitoring and risk prevention and control of composite cable installation process were strengthened. Based on mechanical calculation and three-dimensional simulation, on-site in-situ installation test verification and actual engineering installation application, the stress state of wire rope cable and traction wire rope during composite cable installation, local deflection and overall deflection of composite cable, and the change law of composite cable motion posture during installation were studied in detail. Reasonable risk prevention and control plans and disposal measures were formulated through risk identification and prevention and control measures. Dynamic monitoring of composite cable installation process was achieved based on technical means such as video monitoring, and the actual monitoring data was comprehensively compared with theoretical calculation data and field test data to achieve the purpose of optimizing subsequent engineering installation design.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0037] Figure 1 The present invention is a flow chart of a method for installing a tensioned ICCP system for horizontally constructing an ultra-high conductor frame according to an embodiment.

[0038] Figure 2Schematic diagram of the theoretical installation position of the composite cable A in Example 1.

[0039] Figure 3 Schematic diagram of the deflection of the cable in Example 1 at the theoretical installation position.

[0040] Figure 4 Schematic diagram of the deflection of the zip line in Example 1 at the elevated position.

[0041] Figure 5 It is a schematic diagram of the deflection of the anchor point of the sliding cable in Example 1.

[0042] Figure 6 Schematic diagram of the deflection of the composite cable A in Example 1 after installation.

[0043] Figure 7 It is one of the schematic diagrams of the installation of the composite cable drum in Example 2.

[0044] Figure 8 This is the second schematic diagram of the installation of the composite cable drum in Example 2.

[0045] Fig. 9 It is a schematic diagram of the installation of the composite cable guide wheel in Example 2.

[0046] Fig.10 It is a schematic diagram of the installation of the wire rope guide wheel in Example 2.

[0047] Fig.11 This is a schematic diagram of the installation of the composite cable tensioning sensor in Example 2.

[0048] Fig.12 This is a schematic diagram of the installation of the anchor structure in Example 2. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0052] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0053] Reference Figure 1 The present invention provides a method for installing a tensioned ICCP system for horizontally constructing an ultra-high conductor frame, comprising:

[0054] According to the installation length of the composite cable, several intermediate anchor points are set on the installation path. The cable wire rope is segmented according to the intermediate anchor points. The deflection analysis is performed on each segment to obtain the overall deflection diagram of the cable. The overall deflection diagram of the cable is imported into the conductor frame model for three-dimensional spatial comparison to obtain a three-dimensional comparison diagram of the overall deflection.

[0055] It should be noted that during the installation of the tensioned ICCP system, multiple composite cables may be installed on an ultra-high conductor rack. Therefore, it is necessary to divide the intermediate anchor points of the cable wire ropes corresponding to the composite cables, and then analyze the comprehensive installation status of the multiple cable wire ropes.

[0056] First, the case of a single composite cable is described:

[0057] Since the cable wire rope is inside the conductor frame, it is necessary to check the overall deflection. Each position cannot have structural interference with the conductor frame. Therefore, the middle anchor point of each cable wire rope is divided into several sections according to the position of the middle anchor point. Each section is subjected to deflection analysis to form the overall deflection diagram of the cable. Then, the conductor frame model is imported for three-dimensional space comparison to check whether the deflection meets the installation requirements. Therefore, the reference for this force calculation is determined based on the three-dimensional comparison diagram of the overall deflection of each cable wire rope inside the conductor frame. In this way, the maximum deflection value of the cable wire rope in the traditional method is dispersed to the deflection analysis of each section.

[0058] Then, the case of multiple composite cables is described:

[0059] Multiple composite cables mean multiple cable wires. The overall deflection diagrams of multiple cable wires will be represented in the same jacket model. Therefore, the final overall deflection three-dimensional comparison diagram is the result of iterative fitting of multiple cable dimensions. Because the intervention of each cable wire will affect other cable wires, the effective tension required within the deflection control range of the cable wire rope is calculated to ensure that the composite cable does not interfere with the jacket structure, and sufficient safety factor is reserved according to the breaking tension of the cable. After analyzing the stress conditions, the specifications of the cable wire rope need to be modified, and the cable deflection and stress analysis are re-performed. Only after iterative optimization and cyclic calculation can the specifications of the cable wire rope be finally determined. After determining the specifications of multiple cable wire ropes, the final overall deflection three-dimensional comparison diagram is unified, and the final overall deflection three-dimensional comparison diagram is finally checked.

[0060] After obtaining the overall deflection three-dimensional comparison diagram, the cable wire rope and traction rope are preset on the installation path of the conductor frame, and the traction rope is used to pull the composite cable along the cable. Since the intermediate anchor point is set in advance on the installation path, when the composite cable passes through the intermediate anchor point, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are monitored. Each time an intermediate anchor point is passed, the monitoring action is performed in sequence;

[0061] The installation parameters are adjusted according to the actual deflection value and tension value of the zipline steel wire rope and the actual deflection value of the composite cable, so that the distance error between the composite cable and the installation path is less than the set threshold value. The present invention can monitor each intermediate state, and uses the intermediate anchor point obtained by checking the overall deflection three-dimensional comparison diagram as the intermediate mark position, monitors and adjusts the installation parameters of the zipline steel wire rope and the composite cable each time an intermediate anchor point is passed, and uses the installation path as a reference benchmark to achieve a distance error of the composite cable less than the set threshold value. No matter how high the catheter frame is used, the installation process can be accurately monitored and controlled.

[0062] It should be understood that the installation parameters include but are not limited to the tension of the zipline wire rope, the tension of the traction rope, the traction speed, the installation status of the composite cable between the zipline wire rope at the intermediate anchor point, the weight of the connecting structure counterweight, etc.

[0063] As an implementation method, when performing deflection analysis on each segment to obtain the overall deflection diagram of the cableway, it includes:

[0064] The simulation method is used to simulate the zipline wire rope using the Line model unit in the Orcaflex software package. The parameters of the outer diameter, unit length mass, and axial stiffness of the zipline wire rope are defined in the Line model unit. The rope length is corrected according to the tension at both ends of the zipline wire rope, and the deflection value of the zipline wire rope is calculated to obtain the first deflection result.

[0065] Among them, the dynamic analysis and calculation marine engineering software package Orcaflex is the world's leading software package. In its analysis model, various seabed conditions, wind, waves, currents and other environmental parameters can be set, implicit or explicit integral iteration methods can be selected, and multi-task batch processing is possible. It has efficient analysis capabilities and can perform interference analysis, fatigue analysis, VIV analysis, modal analysis, etc.

[0066] Preferably, the deflection value of the cable wire rope is analyzed and calculated by using a formula method and a finite element method, respectively, to obtain a second deflection result and a third deflection result;

[0067] The average deflection value of the second deflection result and the third deflection result is calculated, and the error between the first deflection result and the average deflection value is calculated. When the error is less than 1%, the overall deflection diagram of the cableway is formulated using the first deflection result.

[0068] (1) Calculate the wire rope deflection according to the formula method

[0069] When the wire rope has an angle of β degrees with the horizontal plane, the theoretical formula for the maximum deflection caused by the deadweight of the wire rope is as follows:

[0070]

[0071] Among them, q is the unit mass of the wire rope, g is the acceleration of gravity, x is the distance between the measuring point and the starting end, and S is the tension at both ends of the wire rope, and the tension at both ends of the wire rope cannot be zero.

[0072] The empirical formula method calculates the deflection of the rope by summarizing and generalizing the empirical formula obtained from a large amount of experimental data. Its advantages are simple calculation and wide application range, but its disadvantage is low accuracy. From the above formula, it can be seen that the calculation of the deflection of the wire rope is proportional to the unit mass of the wire rope, the acceleration of gravity, the distance between the measuring point and the starting end, and inversely proportional to the tension at both ends of the wire rope, and the tension at both ends of the wire rope cannot be zero. According to this formula, the deflection value generated by the deadweight of the wire rope at each position can be approximately calculated. The calculated deflection value is relatively reliable, but the deflection of the wire rope at each position needs to be calculated separately and cannot be solved directly at one time. In addition, the formula cannot give the deflection when there is a support point in the middle of the wire rope, a certain section of the wire rope is subjected to a uniform load, and one or several places are subjected to a concentrated load. In addition, the maximum deflection value given by the formula when the wire rope has an inclination angle is still at the center of the wire rope, which is different from the actual value.

[0073] In order to facilitate the comparison of deflection data, all the deflection data for comparison are selected with the maximum deflection value, and there is no height difference between the two ends of the wire rope, that is, the wire rope remains horizontal, then the maximum deflection theoretical formula caused by the deadweight of the wire rope is deformed as follows:

[0074]

[0075] Among them, q is the unit mass of the wire rope, l is the span, and T is the wire rope tension.

[0076] The theoretical formula for the maximum deflection of a wire rope under its own weight and concentrated load is as follows:

[0077]

[0078] Where Q is the concentrated load.

[0079] The theoretical formula for the maximum deflection of a wire rope under its own weight and multiple concentrated loads is as follows:

[0080]

[0081] Where τ is the load concentration factor. When the number of concentrated loads is 2, w is the concentrated load spacing.

[0082] According to the above formula, when using the formula method to calculate the deflection of the wire rope, different formulas need to be selected according to the force conditions of the wire rope, and the formula method can generally only quickly obtain the maximum deflection of the wire rope, but cannot obtain the overall deflection shape of the wire rope, cannot calculate complex force conditions, and the presence of anchor points in the middle of the wire rope, and the calculation rate is low. However, using the formula method to calculate the simple force conditions of the wire rope is more convenient and faster than other methods.

[0083] (2) Calculation of wire rope deflection based on finite element method

[0084] The finite element calculation of wire rope deflection uses Ansys finite element calculation software. More specifically, the rope unit CABLE280 can be used to analyze structures such as wire ropes and cables. CABLE280 is suitable for analyzing medium to very thin cable structures (such as submarine cables). This unit is a secondary three-node line unit in three-dimensional space. Each node has three degrees of freedom: translation in the x, y and z directions. In static and dynamic simulations, the high-order nonlinear properties of the unit require iterative calculations, and the unit requires tensile stress to provide appropriate lateral stiffness. Compared with traditional line units link180 and beam188, cable280 has better convergence and is closer to reality.

[0085] The deflection value of the cable wire rope is analyzed and calculated by the formula method and the finite element method, respectively, to obtain the second deflection result and the third deflection result; preferably, the error between the second deflection result and the third deflection result is controlled to be less than 1%, and the results obtained by the formula method and the finite element method are considered valid;

[0086] Due to the huge amount of calculation required for the actual installation of composite cables, the formula method and finite element method are difficult to meet the requirements of efficient calculation of multiple stress conditions. According to the principle of wire rope deflection generation, combined with the calculation factors of the finite element method, a new method for calculating wire rope deflection that is suitable for engineering project calculations is developed in combination with finite element technology. The model creation is weakened, which can meet the needs of engineering calculations. The rapid calculation of the overall deflection of the wire rope can be quickly adjusted, and the various stress conditions and stress points of the wire rope can be quickly adjusted, which is convenient for simulating the different stress conditions of the wire rope. The overall shape of the composite cable can be obtained, and the maximum tension and other data required for the cable can be evaluated based on the actual deflection calculation value of the composite cable;

[0087] Therefore, further, the second deflection result and the third deflection result are used to calibrate the first deflection result. Specifically, the average deflection value of the second deflection result and the third deflection result is calculated, and the error between the first deflection result and the average deflection value is calculated. When the error is less than 1%, the first deflection result is used to formulate the overall deflection diagram of the zipline.

[0088] The accuracy of the first deflection result verified in the above manner is very high, and the accuracy of the overall deflection diagram of the cableway formulated by the first deflection result is also improved. In the subsequent installation process, when calibrating the overall deflection three-dimensional comparison diagram according to the actual deflection value and tension value, the simulation method can be used, which has low model dependence, high calculation accuracy and efficiency, and is perfectly adapted to the installation method of this tensioned ICCP system.

[0089] As an implementation mode, after obtaining the overall deflection diagram of the zip line, the method further includes:

[0090] Record the arrangement order of the current intermediate anchor points, define the extreme parameters under several extreme conditions, and use the simulation method to iteratively calculate the deflection of the cable wire rope and composite cable due to their own weight;

[0091] When the pre-tension of the steel wire rope of the zip line is not greater than 100 kN, a combination with the smallest deflection value and the least number of intermediate anchor points is selected as the final intermediate anchor point combination, and the overall deflection diagram of the zip line is formulated based on this.

[0092] Since the determination of the intermediate anchor point is a process of continuous iterative calculation, the principle is to keep the number of anchor support points as small as possible. It is necessary to calculate the extreme parameters under different extreme conditions. Therefore, the simulation method is used to iteratively calculate each combination of anchor support point settings. The deflection of the cable and composite cable caused by their own weight in extreme cases is used to determine the arrangement order of the intermediate anchor points to ensure that the pre-tension of the cable is not greater than 100kN in extreme cases, and the cable and composite cable do not interfere with the lower conductor frame rods.

[0093] After the composite cable passes through the cable wire rope, it only needs to be lowered to the theoretical installation position. After the limiting structure is installed, only 50kN pre-tension is applied to both ends of the composite cable to ensure the fixation of the composite cable in the conductor frame, ensuring the safety of the composite cable from the installation stage to the formal tensioning process of the composite cable under the conductor frame.

[0094] Through iterative analysis and calculation of the composite cable deflection, combined with the actual conditions that can be achieved in the project, the pre-tension of the cable wire rope is selected to be no more than 100kN. This tension data is more in line with the tension value with a safety factor provided by the actual engineering winch. According to the breaking force of the cable wire rope, sufficient safety factor is reserved, and combined with comprehensive analysis of parameters such as the deadweight, axial stiffness, and shear strength of the wire rope, the cable specification is selected as a 28mm diameter, 1960-grade Button wire rope. The wire rope specification determines its minimum breaking force, and the minimum breaking force determines the maximum pre-tension that the cable can withstand. The subsequent composite cable installation is checked according to this wire rope parameter to meet the installation requirements.

[0095] Embodiment 1:

[0096] The following installation analysis and calculation is performed using composite cable A:

[0097] Reference Figures 2 to 6 The composite cable A is located at the bottom of the horizontal construction conductor frame. The branch cover end is located at 14H of the conductor frame and is fixed by an anchoring device and a tensioning device. The sealing cover end is located at 1H of the conductor frame and is fixed to the anchoring lug by an anchoring device. The final installation theoretical position of the composite cable is as follows: Figure 2 As shown, the tensioning device end is 15.983m from the ground, and the anchor lug end is 32.816m from the ground.

[0098] If the cable wire rope is arranged at the theoretical installation position of the composite cable, and the composite cable is located below the cable rope, then after the composite cable passes through the cable rope, a crane needs to be used to lift the composite cable to move it to the theoretical position. Not only is the operation very difficult, but the cable rope arranged at this position is also close to the lower conductor frame rod. The simulation method is used to calculate that the large deflection of the cable rope will cause the composite cable to interfere with the lower rod. Figure 3 As shown, damage to the composite cable may result.

[0099] Through the above analysis, it is necessary to raise the cable for installing composite cable A as high as possible, arrange it above the theoretical installation position of composite cable A, and use appropriate tension to tension the cable to control the deflection of the cable. According to the structure of the conductor frame, raise both ends of the cable to 17.101m from the ground at the tensioning device end and 37.329m from the ground at the anchor lug end. In the most extreme case, before the composite cable is fully pulled onto the cable and the tensioning operation is performed, the cable bears the weight of the entire composite cable and the deflection is the largest. The simulation method will be used to calculate the deflection in extreme cases after the cable is raised. Figure 4 shown.

[0100] The deflection generated at this time is still very large, causing the zipline and composite cable to interfere with the conductor frame rods below. To solve this problem, it is necessary to set anchor support points at the limit structure of composite cable A to reduce the overall deflection of the zipline wire rope. Since composite cable A has five limit structures and the principle is to keep the number of anchor support points as small as possible, the simulation method is used to iteratively calculate the deflection of the zipline and composite cable caused by their own weight under extreme conditions for each combination of anchor support points. Finally, it was determined to set zipline anchor points at 5H, 7H, and 11H respectively, which can ensure that the pre-tension of the zipline is no more than 100kN under extreme conditions, and the zipline and composite cable do not interfere with the conductor frame rods below. The zipline deflection simulation diagram is shown below Figure 5 shown.

[0101] After the composite cable passes through the zipline, it only needs to be lowered to the theoretical installation position. After the limiting structure is installed, only 50kN pre-tension is applied to both ends of the composite cable to ensure the fixation of the composite cable in the conductor frame, ensuring the safety of the composite cable from the installation stage to the formal tensioning process of the composite cable under the conductor frame. Figure 6 Schematic diagram of the deflection of composite cable A after installation.

[0102] As an implementation mode, when monitoring the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable when the composite cable passes through the intermediate anchor points in sequence, it also includes:

[0103] According to the distribution of the final intermediate anchor point combination, a corresponding drone detection module is set at each intermediate anchor point. Preferably, the drone detection module is composed of a drone-mounted video monitoring system; the drone detection module is used to hover at a fixed point in the air to collect the deflection of the cable wire rope and / or the composite cable, and by hanging markers on the cable wire rope and / or the composite cable, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are captured, detected and recorded when the composite cable passes through each intermediate anchor point in turn;

[0104] The actual deflection value and tension value of the zipline wire rope and the actual deflection value of the composite cable are calibrated into the overall deflection three-dimensional comparison chart to evaluate and analyze the deviation value. According to the comparison between the deviation value and the deviation safety factor, the installation parameters are adjusted.

[0105] The theoretical deflection value of the cable wire rope is calculated by simulation method and expressed by a three-dimensional comparison diagram of the overall deflection. The actual deflection value obtained by monitoring during the actual installation process is then comprehensively analyzed. Preferably, the deviation safety factor is 5%. If the deviation value of the two is less than 5%, it proves that the current construction process is controllable. If the deviation value of the two is greater than 5%, it proves that the installation parameters need to be adjusted in time, which is conducive to guiding parameters such as the effective tension of the cable and the weight of the connecting structure during the installation of the composite cable, so that the composite cable will not interfere with the catheter frame structure during the installation process, thereby ensuring the safety of the composite cable during installation.

[0106] Preferably, when the composite cable is being pulled, the actual deflection value of the cable wire rope is measured by measuring a small light source lamp arranged on the cable wire rope;

[0107] When the composite cable is fully pulled into place, measure the final cable wire deflection;

[0108] After the measurement is completed, the small light source lamp is recovered through the recovery zipline to complete the measurement.

[0109] Preferably, tension sensors are connected to both ends of the cable wire rope to detect the tension value of the tension sensor;

[0110] Start the cable traction winch, and when the pre-tensioning force at both ends of the cable wire rope reaches 50 kN, brake the winch, observe the cable state of the cable wire rope for 5 minutes, and test the winch torque sensor and cable tension sensor at the same time;

[0111] After finding no abnormalities, start the zipline traction winch again, increase the pre-tensioning force of the zipline wire rope to 100kN, and confirm that the zipline wire rope reaches the theoretical height position at each of the intermediate anchor points.

[0112] In this embodiment, when calibrating the overall deflection three-dimensional comparison diagram, it also includes:

[0113] The composite cable is pulled along the installation direction. When passing through the first intermediate anchor point, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are compared with the first deflection result obtained by the simulation method, and the deviation value is obtained by evaluation and analysis;

[0114] If the deviation value is less than or equal to the deviation safety factor, continue to pull the composite cable;

[0115] If the deviation value is greater than the deviation safety factor, stop releasing the protective wire rope, increase the reverse force of the composite cable and reduce the actual deflection value of the composite cable.

[0116] It should be noted that when performing simulation calculations, the deflection calculation is also performed in sequence according to the order of the intermediate anchor points, and each intermediate state parameter is calculated, and then compared with the actual deflection when the composite cable passes through each intermediate anchor point in sequence during the actual traction process; preferably, the deviation safety factor is 5%.

[0117] In this embodiment, every time the composite cable is pulled forward 15m, the winch is controlled to stop moving once, and then the composite cable drum reducer is used to control the tightening and releasing of the composite cable, and the actual deflection value of the composite cable is adjusted to be within the first deviation range that meets the first deflection result. Preferably, the first deviation range is 5%.

[0118] In this embodiment, during the traction process of the composite cable, when the connection structure between the composite cable and the zipline wire rope reaches the middle anchor point, the composite cable stops being pulled, and the operator at the middle anchor point uses a set of hand winches on the sling and the zipline wire rope anchor point shackle to cover the zipline wire rope behind the connection structure, adjusts the hand winch to lift the zipline wire rope, adjusts the installed hand winch to lower the zipline wire rope, loosens the zipline in front of the connection structure, removes the shackle bolt in front of the connection structure to release the zipline wire rope, adjusts the hand winch behind the connection structure to make the zipline wire rope reach the theoretical line position, and then starts the zipline traction winch to continue traction of the composite cable.

[0119] The following examples are provided to further illustrate the present invention, but the scope of the present invention is not limited thereto.

[0120] Embodiment 2:

[0121] Reference Figures 7 to 12 , Composite cable installation process:

[0122] (1) Before installing the composite cable, it is necessary to confirm that the composite cable tensioning platform and reinforcement rods located at the 14H and 1H sheets of the conductor frame have been installed, the composite cable pre-buried rope extends the composite cable installation path through the entire conductor frame, the temporary tensioning door frame located outside the 14H composite cable tensioning platform has been installed, the composite cable limit device located at the horizontal layer of the 13H, 11H, 7H, and 5H conductor frames has been installed in an open state, and the scaffolding at each position of the subsequent installation steps of the composite cable has been installed;

[0123] (2)Reference Figure 7 , according to the layout drawing, arrange the composite cable drum and a 50kN winch at the 14H side site, and provide a restraining force of not less than 150kN for the composite cable drum, and a restraining force of not less than 100kN for the 50kN winch, and then connect the power to the drum reducer and winch for debugging; build a composite cable ground protection air cushion on the ground in the direction of the composite cable outgoing cable;

[0124] (3)Reference Figure 8According to the layout drawing, two wire rope winches and wire rope fixed pulleys are installed outside the conductor frame 1H. A 150kN winch is responsible for pulling the wire rope sling (specification 28mm wire rope), a 50kN winch is responsible for pulling the composite cable traction rope (specification 16mm wire rope), and a 20kN winch is responsible for pulling the thin wire rope (specification 4mm wire rope). The thin wire rope, sling and traction wire rope have been wound on the three winches respectively. The winches and wire rope fixed pulleys are fixed to the ground with counterweights, steel plates, steel cables and fixed shackles. Each winch must ensure a restraining force of more than 350kN. After the winch is fixed, it needs to be connected to the power test;

[0125] (4)Reference Fig. 9 According to the layout drawing, a composite cable guide wheel is installed at the 14H composite cable tensioning platform structure. The composite cable guide wheel is used to pull the composite cable from the composite cable drum to the bottom of the cable for guidance; at the same time, a thin steel wire rope guide wheel is installed;

[0126] (5)Reference Fig.10 According to the layout diagram, install the temporary support of the guide wheel, the guide wheel of the sliding rope and the guide wheel of the traction wire rope at the bottom reinforcement rod structure of the 1H sheet composite cable. The guide wheel is used for guiding the sliding rope and the traction wire rope; at the same time, install the guide wheel of the thin wire rope;

[0127] (6) The sliding cable and traction steel wire rope are connected with the pre-buried rope arranged in advance. The pre-buried rope is recovered by the 50kN winch arranged in advance on the 1H side. The sliding cable steel wire rope and the composite cable traction steel wire rope are pulled from the 1H side winch to 14H through the steel wire rope fixed pulley, the sliding cable steel wire rope guide wheel and the traction steel wire rope guide wheel respectively. The end of the sliding cable steel wire rope is temporarily placed at the composite cable tensioning platform, and the end of the traction steel wire rope is temporarily placed at the composite cable guide wheel; the pre-buried rope is removed from the 50kN winch, and then a thin steel wire rope is wound around the winch for use during the installation of the composite cable;

[0128] (7)Reference Fig.11 According to the layout drawing, install the fixed lifting lug at the end of the zip rope, the tension sensor and the connecting shackle tooling at the 14H sheet composite cable tensioning platform structure. The lifting lug is used to fix the end of the zip rope; use a handheld data collector to connect the tension sensor, debug the tension sensor and the data collector, and perform zeroing operation;

[0129] (8)Reference Fig.12 According to the layout drawing, temporary fixed anchor points of the sliding cable are installed on the horizontal layer structures of the jacket 5H, 7H and 11H. Each anchor point is composed of slings connecting 2 sets of hand chain hoists and the anchor point shackles of the sliding cable wire rope. Use one set of hand chain hoists and the anchor point shackles of the sliding cable wire rope to cover the sliding cable wire rope, and operate the hand chain hoist to lift the sliding cable wire rope to the theoretical position in the figure;

[0130] (9) Install video monitoring equipment inside the conduit according to the layout drawing and connect it for power testing. The key steps in the composite cable installation process can be recorded by drones;

[0131] (10) After the above steps are completed, the composite cable installation personnel take their positions, start the cable traction winch, tension the cable wire rope, and brake the winch when the pre-tension reaches 50kN according to the tension sensor reading. Observe the status of the wire rope cable for 5 minutes, and test the winch torque sensor and cable tension sensor at the same time;

[0132] (11) If there is no abnormality in the previous step, start the cable winch again, increase the pre-tensioning force of the cable wire rope to 100kN, and confirm whether the cable wire rope anchor points at the 5H, 7H, and 11H levels of the jacket have reached the theoretical height position. If not, adjust the hand winch to make the anchor point reach the theoretical height position of the cable;

[0133] (12) Control the composite cable drum reducer to release the composite cable from the drum, and control the 50kN winch to release the thin steel wire rope. Use a crane to lift the composite cable sealing cover end and the end of the thin steel wire rope to the composite cable guide wheel and connect them to the end of the composite cable traction wire rope. Ensure that the composite cable can pass through the composite cable guide wheel smoothly. When the composite cable passes through the guide wheel, personnel are required to assist nearby. The thin steel wire rope needs to pass through the thin steel wire rope guide wheel;

[0134] (13) Start the composite cable traction winch to recycle the composite cable traction rope, pull the composite cable sealing cover through the guide wheel to the connection structure installer under the cable on the scaffold between 14H and 13H, and stop the car. At the same time, use the composite cable drum reducer to control the release of the composite cable. The installer installs the first composite cable and cable connection structure to connect the composite cable sealing cover end buckle to the cable; pull the thin steel wire rope to this point, use the thin steel wire rope to tie it to the lifting ring and plug on the side of the connection structure. After the connection structure is installed, start the traction winch. The winch stops every 15m of the composite cable forward. Then use the composite cable drum reducer to control the tightening and release of the composite cable to minimize the disturbance value of the composite cable and facilitate the installation of the connection structure. Hand winches and slings can be used to assist during installation. While installing the connection structure, tie the thin steel wire rope to the lifting ring on the side of the connection structure. Try to ensure that the deflection of the thin steel wire rope and the composite cable is consistent. Use the thin steel wire rope to connect all the connection structures in series;

[0135] (14) During the traction of the composite cable, the operator must always observe the cable deflection and tension sensor, read the cable tension data from the handheld data collector, and the maximum value shall not exceed 150kN. The cable winch shall be used to adjust the cable wire rope tension value on site according to the cable deflection value and the distance between the composite cable and the conductor frame rod;

[0136] (15) During the traction of the composite cable, when the connection structure between the composite cable and the cable reaches the temporary anchor point, the composite cable stops being pulled, and the operator at the temporary anchor point uses another set of hand chain hoists on the sling and the cable wire rope anchor point shackle to cover the cable wire rope behind the connection structure, adjusts the hand chain hoist to lift the cable, adjusts the installed hand chain hoist to lower the cable, loosens the cable in front of the connection structure, removes the shackle bolt in front of the connection structure to release the cable wire rope, adjusts the hand chain hoist behind the connection structure to make the cable wire rope reach the theoretical line position, and then starts the traction rope winch to continue traction of the composite cable;

[0137] (16) Since the composite cable has almost completely passed through the guide wheel before the composite cable branch cover passes through the composite cable guide wheel, if there is no weight constraint between the branch cover end and the last set of connection structures, the composite cable may accelerate through the guide wheel and cause the branch cover end to fall. Therefore, it is necessary to connect the composite cable branch cover with the composite cable drum in advance with a protective steel wire rope. After the branch cover is separated from the drum, the composite cable drum can also be used to tighten the protective steel wire rope to connect the composite cable branch cover end to prevent the composite cable branch cover end from falling. When the composite cable branch cover end completely passes through the guide wheel, the composite cable traction is stopped;

[0138] (17) After the composite cable stops pulling, the branch cover end and the sealing cover end of the composite cable are connected to the anchor device, the branch cover end anchor chain secondary chain is connected to the 14H composite cable tensioning platform secondary lifting ear, the main anchor chain is temporarily fixed through the tensioning hole, the anchor device is installed at 1H, the sealing cover end is connected to the anchor chain of the anchor device installed at 1H, and the installation can be assisted by a hand winch and a sling; the end of the thin steel wire rope on the connecting structure is temporarily fixed to the 1H structure, and the traction steel wire rope connected to the sealing cover end of the composite cable can be removed and recovered to the traction rope winch, and the protective steel wire rope connected to the branch cover end can be removed and recovered to the composite cable drum, waiting for the subsequent installation and use of the composite cable;

[0139] (18) After both ends of the composite cable are fixed, the composite cable at the limit device is lifted with a sling and installed inside the limit device. The limit device is closed and the composite cable is locked. During installation, a hand winch and a sling can be used to assist to ensure that the composite cable is supported by the limit device. If the composite cable is far away from the limit device, the cable winch can be reversed to relax the cable and lower it. At the same time, the nearby composite cable and cable connection structure can be opened to facilitate the installation of the composite cable into the limit device. However, the composite cable must be controlled not to collide with the surrounding conductor frame structure.

[0140] (19) Start the thin steel wire rope winch at site 1H, release the thin steel wire rope and use the crane to hoist it to the end of the thin steel wire rope for the series connection structure temporarily fixed on the structure 1H, use the thin steel wire rope clamp to connect the two thin steel wire ropes, and pass the thin steel wire rope guide wheel of 1H;

[0141] (20) Reverse the 1H side fine steel wire rope winch to tighten the 1H side fine steel wire rope, stop and wait after tightening, then reverse the 14H side 50kN winch to slowly retract the 14H fine steel wire rope. As the fine steel wire rope is straightened, the plugs of the composite cable and the cable connection structure are pulled out in sequence, and the connection structure is separated from the composite cable. When the last connection structure is detached, the 50kN winch stops;

[0142] (21) At this time, the thin steel wire rope on the 1H side is released while the thin steel wire rope on the 14H side is recovered. As the thin steel wire rope is recovered, the connection structure moves along the cable toward 14H. When the connection structure passes through the anchor point, the method in Article (15) is used to make the connection structure pass through the anchor point. The installer under the cable on the scaffold between 14H and 13H is responsible for recovering the connection structure for subsequent composite cable installation and use. After the connection structure is fully recovered, the two thin steel wire ropes are separated, and the 50kN winch on the 14H side recovers its own thin steel wire rope, and the pre-buried rope is reinstalled on the reel.

[0143] (22) Use the tensioning structure to fix the hand chain hoist to pre-tension the main anchor chain at the branch cover end of the composite cable. Connect a tension sensor in series at the end of the hand chain hoist to read the tension. After tensioning to 50kN, insert the tensioning device pin to fix it so that the composite cable is initially tensioned. If the length of the anchor chain at both ends is too long, the length of the anchor chain can be shortened on site;

[0144] (23) Pull the pre-buried steel wire rope to the fixed position at the end of the cable, connect the pre-buried wire with the cable knot at the end of the cable wire rope, tighten the pre-buried wire, relax the tension sensor and the sensor tooling, and then remove the tension sensor and the connection buckle tooling recovery equipment; then use the fine steel wire rope winch, the cable wire rope winch and the pre-buried wire winch to recover the cable wire rope and the 1H side fine steel wire rope. After the fine steel wire rope and the cable rope are recovered, reverse and start the pre-buried wire winch to recover the pre-buried wire, and then recover all the remaining installation equipment for subsequent composite cable installation and use;

[0145] (24) Remove the two sets of wire rope guide wheels and thin wire rope guide wheels at 1H, and at the same time remove the temporary tensioning gantry, composite cable guide wheels and thin wire rope guide wheels at 14H, and use a crane to recover the composite cable drum, counterweight block and steel plate for subsequent composite cable installation;

[0146] (25) Install fireproof cloth or fireproof sheath on the installed composite cable to prevent the composite cable from being damaged by other hot work.

[0147] In this embodiment, the theoretical data of the zipline deflection are compared with the measured data. Specifically, the obtained theoretical deflection morphology diagram of the zipline deflection at different times is imported into CAD, and the section between measuring point 1 and measuring point 4, which is 28150mm to 62050mm from the end of the zipline 14H, is selected as the comparison section.

[0148] Import the theoretical morphological diagram of the cable deflection at each moment and overlap it with the actual morphological diagram of the cable deflection to compare the difference between the two morphologies. In order to obtain accurate comparison results, select the comparison segment deflection theoretical data and the actual measurement data for comparison. Select the deflection data list of several intermediate moments to compare the curve deflection in the entire measurement section. Among them, different moments represent the traction state of the composite cable, moment 1 is the starting moment, moment 2 is the moment after 5 hours, moment 3 is the moment after 7 hours, moment 4 is the moment after 11 hours, and moment 5 is the final moment, as shown in the following table:

[0149] Table 1:

[0150]

[0151] From the table above, we can see that the error range between the actual and theoretical values ​​of the measured section cable deflection is within 5%. Since the theoretical value is calculated based on the ideal state simulation, the quality of the cable, the quality of the connection structure, the quality of the test composite cable and other parameters in the actual installation process are different from the theoretical value, so there will be errors in the calculation results. From the final comparison results, the error range is controlled within 5%, which can be determined that the theoretical form of the cable deflection is basically consistent with the actual form, the error is small, and the process state is controllable.

[0152] In summary, compared with the prior art, the above embodiment provides a tensioned ICCP system installation method for horizontally constructed ultra-high conductor frames. In order to solve the technical difficulties of horizontal installation of impressed current cathodic protection system (ICCP for short) on newly built conductor frames on land, a new installation scheme using a slide cable is studied. In order to solve the feasibility of ICCP composite cable installation scheme for deep-water horizontal conductor frames, the monitoring and risk prevention and control of the composite cable installation process are strengthened. Based on mechanical calculation and three-dimensional simulation, on-site in-situ installation test verification and actual engineering installation application, the stress state of wire rope slide cable and traction wire rope during composite cable installation, the local deflection and overall deflection of composite cable, and the change law of composite cable motion posture during installation are studied in detail. Reasonable risk prevention and control plans and disposal measures are formulated through risk identification and prevention and control measures. Dynamic monitoring of the composite cable installation process is realized based on technical means such as video monitoring, and the actual monitoring data is comprehensively compared with theoretical calculation data and field test data to achieve the purpose of optimizing subsequent engineering installation design.

[0153] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for installing a tensioned ICCP system for horizontally constructing an ultra-high conductor rack, characterized in that: include: According to the installation length of the composite cable, several intermediate anchor points are set on the installation path. The cable wire rope is segmented according to the intermediate anchor points. The deflection analysis is performed on each segment to obtain the overall deflection diagram of the cable. The overall deflection diagram of the cable is imported into the conductor frame model for three-dimensional spatial comparison to obtain a three-dimensional comparison diagram of the overall deflection. Preset the cable wire rope and traction rope on the installation path of the conductor frame, use the traction rope to pull the composite cable to move along the cable, and monitor the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable when the composite cable passes through the intermediate anchor points in sequence; The installation parameters are adjusted according to the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable, so that the distance error between the composite cable and the installation path is less than a set threshold.

2. The installation method according to claim 1, characterized in that: When performing deflection analysis on each segment and obtaining the overall deflection diagram of the cableway, the following are included: The simulation method is used to simulate the zipline wire rope using the Line model unit in the Orcaflex software package. The parameters of the outer diameter, unit length mass, and axial stiffness of the zipline wire rope are defined in the Line model unit. The rope length is corrected according to the tension at both ends of the zipline wire rope, and the deflection value of the zipline wire rope is calculated to obtain the first deflection result.

3. The installation method according to claim 2, characterized in that: The deflection value of the cable wire rope is analyzed and calculated by using the formula method and the finite element method, and the second deflection result and the third deflection result are obtained respectively; The average deflection value of the second deflection result and the third deflection result is calculated, and the error between the first deflection result and the average deflection value is calculated. When the error is less than 1%, the overall deflection diagram of the cableway is formulated using the first deflection result.

4. The installation method according to claim 3, characterized in that: After obtaining the overall deflection diagram of the zip line, it also includes: Record the arrangement order of the current intermediate anchor points, define the extreme parameters under several extreme conditions, and use simulation method to iteratively calculate the deflection of the cable wire rope and composite cable due to their own weight; When the pre-tension of the steel wire rope of the zip line is not greater than 100 kN, a combination with the smallest deflection value and the least number of intermediate anchor points is selected as the final intermediate anchor point combination, and the overall deflection diagram of the zip line is formulated based on this.

5. The installation method according to claim 4, characterized in that: When monitoring the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable when the composite cable passes through the intermediate anchor points in sequence, it also includes: According to the distribution of the final intermediate anchor point combination, a corresponding drone detection module is set at each intermediate anchor point, and the drone detection module is used to hover at a fixed point in the air to collect the deflection of the cable wire rope and / or the composite cable. By hanging markers on the cable wire rope and / or the composite cable, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are captured, detected and recorded when the composite cable passes through each intermediate anchor point in turn; The actual deflection value and tension value of the zipline wire rope and the actual deflection value of the composite cable are calibrated into the overall deflection three-dimensional comparison chart to evaluate and analyze the deviation value. According to the comparison between the deviation value and the deviation safety factor, the installation parameters are adjusted.

6. The installation method according to claim 5, characterized in that: When the composite cable is being pulled, the actual deflection value of the cable wire rope is measured by measuring a small light source arranged on the cable wire rope; When the composite cable is fully pulled into place, measure the final cable wire deflection; After the measurement is completed, the small light source lamp is recovered through the recovery zipline to complete the measurement.

7. The installation method according to claim 5, characterized in that: Connecting tension sensors at both ends of the cable wire rope to detect the tension value of the tension sensor; Start the cable traction winch, and when the pre-tensioning force at both ends of the cable wire rope reaches 50 kN, brake the winch, observe the cable state of the cable wire rope for 5 minutes, and test the winch torque sensor and cable tension sensor at the same time; After finding no abnormalities, start the zipline traction winch again, increase the pre-tensioning force of the zipline wire rope to 100kN, and confirm that the zipline wire rope reaches the theoretical height position at each of the intermediate anchor points.

8. The installation method according to claim 7, characterized in that: When calibrating the overall deflection 3D comparison diagram, it also includes: The composite cable is pulled along the installation direction. When passing through the first intermediate anchor point, the actual deflection value and tension value of the cable wire rope and the actual deflection value of the composite cable are compared with the first deflection result obtained by the simulation method, and the deviation value is obtained by evaluation and analysis; If the deviation value is less than or equal to the deviation safety factor, continue to pull the composite cable; If the deviation value is greater than the deviation safety factor, stop releasing the protective wire rope, increase the reverse force of the composite cable and reduce the actual deflection value of the composite cable.

9. The installation method according to claim 8, characterized in that: Every time the composite cable is pulled forward 15m, the winch is controlled to stop moving, and then the composite cable drum reducer is used to control the tightening and releasing of the composite cable, and the actual deflection value of the composite cable is adjusted to a first deviation range that meets the first deflection result.

10. The installation method according to claim 9, characterized in that: During the traction process of the composite cable, when the connection structure between the composite cable and the zip line wire rope reaches the middle anchor point, the composite cable stops being pulled, and the operator at the middle anchor point uses a set of hand winches on the sling and the zip line wire rope anchor point shackle to cover the zip line wire rope behind the connection structure, adjusts the hand winch to lift the zip line wire rope, adjusts the installed hand winch to lower the zip line wire rope, loosens the zip line in front of the connection structure, removes the shackle bolt in front of the connection structure to release the zip line wire rope, adjusts the hand winch behind the connection structure to make the zip line wire rope reach the theoretical line position, and then starts the zip line traction winch to continue traction of the composite cable.

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