A tensioned ICCP system installation method for horizontally constructed ultra-high jackets

Abstract

The present invention provides a method for installing a tensioned ICCP system for horizontal ultra-high jacket construction. The method includes setting several intermediate anchor points along the installation path based on the installation length of the composite cable. The cable wire rope is segmented based on the intermediate anchor points. Deflection analysis is performed on each segment to obtain an overall cable deflection diagram. This overall cable deflection diagram is then imported into a jacket model for three-dimensional spatial comparison, resulting in a three-dimensional overall deflection comparison diagram. A cable wire rope and a traction rope are pre-set along the jacket installation path. The traction rope is used to pull the composite cable along the cable rope. The actual deflection and tension of the cable wire rope, as well as the actual deflection of the composite cable, are monitored as the composite cable passes through the intermediate anchor points. Installation parameters are adjusted based on the actual deflection and tension of the cable wire rope and the actual deflection of the composite cable, ensuring that the distance error between the composite cable and the installation path is less than a set threshold. The present invention enables dynamic monitoring of the composite cable installation process, optimizing the installation design of subsequent projects.

Description

Technical Field

[0001] The invention belongs to the technical field of conductor pipe composite cable installation, and in particular relates to a method for installing a tensioned ICCP system for horizontally constructing an ultra-high conductor pipe. 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 jacket foundations. Its core component is a composite cable-electrode system that integrates auxiliary anodes and reference electrodes. It can be tensioned and fixed inside the jacket through anchor structures at the head and tail of the jacket, realizing distributed integrated installation of auxiliary anodes and reference electrodes.

[0003] Currently, tensioned ICCP technology has become the primary cathodic protection technology for offshore pile-based fixed jacket platforms. It not only addresses the urgent need to extend the cathodic protection life of existing deepwater jackets, but is also being promoted for full-life cathodic protection of newly built jacket platforms. For example, Chinese patent application number CN202210406529.8, "A Composite Cable Installation Method for Newly Built Jackets," discloses the use of steel wire ropes as guide cables for installing composite cables, with a winch used to pull the composite cables into place. This method is suitable for the installation of tensioned ICCP composite cables during the onshore horizontal construction phase of deepwater jackets. However, this patent does not consider the actual deflection values ​​of the composite cables and cable wire ropes during actual construction, nor does it calibrate the original deflection diagram design based on actual measured parameters. This is particularly true in the installation scenario of tensioned ICCP systems for ultra-high jackets. A lack of effective monitoring throughout the composite cable installation process can directly impact 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 to the onshore installation of new flexible jacket tensioned ICCPs, is of great significance to achieving international and industry-leading levels. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a method for installing a tensioned ICCP system for horizontally constructed ultra-high conductor racks, which is mainly used to solve the problems in the existing technology of installing a tensioned ICCP system for ultra-high conductor racks, such as the inability to adjust the construction process according to actual monitoring data, and the lack of monitoring that affects construction efficiency and results.

[0006] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0007] The present invention provides a method for installing a tensioned ICCP system for horizontally constructing an ultra-high jacket, 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 of each segment is analyzed to obtain the overall deflection diagram of the cable. The overall deflection diagram of the cable is imported into the jacket 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 jacket. Use the traction rope to pull the composite cable along the cable. Monitor the actual deflection and tension of the cable wire rope and the actual deflection of the composite cable when the composite cable passes through the intermediate anchor points.

[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 following steps are included:

[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 zipline wire rope's outer diameter, unit length mass, and axial stiffness 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 a formula method and a finite element method, respectively, to obtain a second deflection result and a 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 first deflection result is used to formulate an overall deflection diagram of the cableway.

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

[0016] Record the current arrangement order of the intermediate anchor points, define extreme parameters under several extreme conditions, and use simulation methods 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 cable wire rope is no more than 100 kN, the 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 cable rope 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, the method further 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. 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 composite cable. By hanging markers on the cable wire rope and / or 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 zip line wire rope and the actual deflection value of the composite cable are calibrated into a three-dimensional comparison chart of the overall deflection, the deviation value is evaluated and analyzed, and the installation parameters are adjusted according to the comparison between the deviation value and the deviation safety factor.

[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 light source lamp is recovered through the recovery rope 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. When the pre-tensioning force at both ends of the cable wire rope reaches 50 kN, brake the winch and observe the cable state of the cable wire rope for 5 minutes. At the same time, test the winch torque sensor and cable tension sensor.

[0026] After finding no abnormalities, start the zip line traction winch again, increase the pre-tensioning force of the zip line wire rope to 100kN, and confirm that the zip line 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, the method further includes:

[0028] Pull the composite cable along the installation direction. When passing the first intermediate anchor point, compare the actual deflection and tension value of the cable wire rope, the actual deflection value of the composite cable, and the first deflection result obtained by the simulation method to evaluate and analyze the deviation value.

[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 once, and then the composite cable drum reducer is used to control the tightening and release of the composite cable to adjust the actual deflection value of the composite cable to within a 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 zip line wire rope reaches the middle anchor point, the composite cable stops traction, 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.

[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 (ICCP) system on land horizontal installation of new jacket, a new installation scheme using cable was studied. In order to solve the feasibility of ICCP composite cable installation scheme for deepwater horizontal jacket, the monitoring and risk prevention 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. Through risk identification and prevention and control measures, reasonable risk prevention and control plans and disposal measures were formulated. 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 will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described with reference to the accompanying drawings. However, 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 effort.

[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 This is a schematic diagram of the deflection of the anchor point of the 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 This 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] Figure 9 This is a schematic diagram of the installation of the composite cable guide wheel in Example 2.

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

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

[0048] Figure 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 clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of the present invention, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device but with an intervening 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 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 jacket, 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 of each segment is analyzed to obtain the overall deflection diagram of the cable. The overall deflection diagram of the cable is imported into the jacket 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 frame. 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 multiple cable wire ropes.

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

[0057] Because the cable ropes are located inside the jacket, their overall deflection needs to be verified. Each position must avoid structural interference with the jacket. Therefore, each cable rope is divided into several sections based on the intermediate anchor points. Deflection analysis is performed on each section to create an overall deflection diagram for the cable rope. This diagram is then imported into the jacket model for 3D spatial comparison to verify whether the deflection meets installation requirements. Therefore, the reference for this force calculation is determined based on the 3D comparison diagram of the overall deflection of each cable rope inside the jacket. This allows the maximum deflection value of the cable rope, which is traditionally considered, to be distributed to each section in the deflection analysis.

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

[0059] Multiple composite cables represent multiple cable ropes. Their overall deflection diagrams are represented within the same jacket model. Therefore, the final 3D deflection comparison diagram is the result of an iterative fit across multiple cable dimensions. Because each cable rope affects the others, the effective tension required to maintain the cable rope deflection control range while ensuring the composite cable does not interfere with the jacket structure is calculated based on each cable rope's 3D deflection comparison diagram. A sufficient safety factor is also reserved based on the cable's breaking force. Based on the stress analysis, the cable rope specifications need to be modified, and the cable deflection and stress analysis must be re-performed. Only after this iterative optimization cycle can the cable rope specifications be finalized. After determining the specifications of the multiple cable ropes, the final 3D deflection comparison diagram is then unified and verified.

[0060] After obtaining the overall deflection 3D comparison diagram, a cable wire rope and a traction rope are preset on the jacket installation path. The traction rope is used to pull the composite cable along the cable wire rope. Since intermediate anchor points are set in advance on the installation path, the actual deflection and tension values ​​of the cable wire rope and the actual deflection value of the composite cable are monitored when the composite cable passes through the intermediate anchor points. The monitoring action is performed sequentially after each intermediate anchor point.

[0061] The installation parameters are adjusted according to the actual deflection value and tension value of the zip line 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 chart as the intermediate marker position, monitors and adjusts the installation parameters of the zip line 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 conductor 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 zip line wire rope, the tension of the traction rope, the traction speed, the installation status of the composite cable between the zip line wire rope at the middle 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, the following steps are included:

[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 zipline wire rope's outer diameter, unit length mass, and axial stiffness 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, Orcaflex, a dynamic analysis and calculation software package for marine engineering, is a world-leading software package. In its analysis model, various seabed conditions, wind, waves, current and other environmental parameters can be set. Implicit or explicit integral iteration methods can be selected. It is capable of multi-task batch processing and has efficient analysis capabilities. It 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 using the formula method and the finite element method, respectively, to obtain the second deflection result and the 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 first deflection result is used to formulate an overall deflection diagram of the cableway.

[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 a rope by summarizing and generalizing a large amount of experimental data. Its advantages are simple calculation and wide applicability, but its disadvantage is low accuracy. As can be seen from the above formula, the calculated deflection of a wire rope is proportional to the unit mass of the wire rope, the acceleration of gravity, and the distance between the measurement point and the starting end, and is 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 caused by the weight of the wire rope alone at each position can be approximately calculated. The calculated deflection value is relatively reliable, but the deflection of each part of the wire rope must be calculated separately and cannot be directly solved 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 section of the wire rope is subjected to a uniform load, or one or several parts are subjected to a concentrated load. In addition, the maximum deflection value given by the formula when the wire rope is tilted is still at the center of the wire rope, which deviates from the actual value.

[0073] To facilitate the comparison of deflection data, all comparative deflection data are selected with the maximum deflection value, and there is no height difference between the two ends of the wire rope support, that is, the wire rope remains horizontal. The theoretical formula for the maximum deflection caused by the deadweight of the wire rope is transformed as follows:

[0074]

[0075] Where 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 stress conditions of the wire rope. In addition, the formula method can only quickly calculate the maximum deflection of the wire rope, but cannot determine the overall deflection shape of the wire rope. It cannot calculate complex stress conditions or the presence of anchor points in the middle of the wire rope, and the calculation rate is low. However, the formula method is more convenient and faster than other methods for calculating simple stress conditions of the wire rope.

[0083] (2) Calculate the wire rope deflection according to the finite element method

[0084] The finite element calculation of wire rope deflection uses Ansys finite element calculation software. More specifically, the rope element 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 element is a quadratic three-node line element 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 element require iterative calculations, and the element requires tensile stress to provide appropriate lateral stiffness. Compared with traditional line elements 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 using the formula method and the finite element method, respectively, to obtain a second deflection result and a 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 the finite element method are difficult to meet the requirements for efficient calculation of multiple stress conditions. Based on the principle of wire rope deflection generation, combined with the calculation factors of the finite element method, a new wire rope deflection calculation method suitable for engineering project calculations has been developed by combining finite element technology. This weakens the model creation and can meet the requirements of engineering calculations for the rapid calculation of the overall deflection of the wire rope, and can quickly adjust the various stress conditions and stress points of the wire rope, making it convenient to simulate the different stress conditions of the wire rope and obtain the overall shape of the composite cable. Only then can the maximum tension and other data required for the cable scheme be evaluated based on the actual deflection calculation value of the composite cable.

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

[0088] The accuracy of the first deflection result verified in the above method is very high, which also improves the accuracy of the overall deflection diagram of the cableway formulated based on the first deflection result. 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. It has the characteristics of low model dependence, high calculation accuracy and efficiency, and is perfectly adapted to the installation method of this tensioned ICCP system.

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

[0090] Record the current arrangement order of the intermediate anchor points, define extreme parameters under several extreme conditions, and use simulation methods 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 cable wire rope is no more than 100 kN, the 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 cable rope is formulated based on this.

[0092] Determining the intermediate anchor points is an iterative process, with the principle of minimizing the number of anchor support points. It is necessary to calculate extreme parameters under different extreme conditions. Therefore, a simulation method is used to iteratively calculate each anchor support point setting combination. The deflection caused by the deadweight of the cable and composite cable in extreme conditions is used to determine the arrangement sequence of the intermediate anchor points. This ensures that the pretension of the cable does not exceed 100kN in extreme conditions, and that the cable and composite cable do not interfere with the underlying conductor frame members.

[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 that the composite cable is fixed 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's deflection, combined with practical engineering requirements, the pretension of the cable's wire rope was selected to be no more than 100kN. This tensile force is consistent with the actual tensile force with a safety factor provided by the winch in the project. A sufficient safety factor was reserved based on the cable's breaking force, and a comprehensive analysis of parameters such as the wire rope's deadweight, axial stiffness, and shear strength led to the selection of a 28mm diameter, 1960-grade Buton wire rope. The wire rope's specification determines its minimum breaking force, which in turn determines the maximum pretension the cable can withstand. Subsequent composite cable installation will be verified based on these wire rope parameters to meet installation requirements.

[0095] Example 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 jacket. The branch cover end is located at 14H of the jacket and is fixed with an anchoring device and a tensioning device. The sealing cover end is located at 1H of the jacket and is fixed to the anchoring lug with an anchoring device. The theoretical height of the composite cable at both ends of the final installation position 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 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 jacket 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, the two ends of the cable are raised 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, when the composite cable is fully pulled onto the cable and before 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 generated in extreme cases after the cable is raised. Figure 4 shown.

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

[0101] After the composite cable passes through the slide cable, 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 that the composite cable is fixed 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 embodiment, 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 equipped with a 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 composite cable, and by hanging markers on the cable wire rope and / or 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 sequence;

[0104] The actual deflection value and tension value of the zip line wire rope and the actual deflection value of the composite cable are calibrated into a three-dimensional comparison chart of the overall deflection, the deviation value is evaluated and analyzed, and the installation parameters are adjusted according to the comparison between the deviation value and the deviation safety factor.

[0105] The theoretical deflection value of the cable wire rope is calculated using the simulation method and expressed through 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 counterweight during the installation of the composite cable, so that the composite cable will not interfere with the conductor 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 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 light source lamp is recovered through the recovery rope 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. When the pre-tensioning force at both ends of the cable wire rope reaches 50 kN, brake the winch and observe the cable state of the cable wire rope for 5 minutes. At the same time, test the winch torque sensor and cable tension sensor.

[0111] After finding no abnormalities, start the zip line traction winch again, increase the pre-tensioning force of the zip line wire rope to 100kN, and confirm that the zip line 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, the following steps are also included:

[0113] Pull the composite cable along the installation direction. When passing the first intermediate anchor point, compare the actual deflection and tension value of the cable wire rope, the actual deflection value of the composite cable, and the first deflection result obtained by the simulation method to evaluate and analyze the deviation value.

[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 the simulation method, the deflection calculation is also performed in the order of the intermediate anchor points, and the various intermediate state parameters are calculated, and then compared with the actual deflection when the composite cable passes through each intermediate anchor point in turn 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 release of the composite cable, and the actual deflection value of the composite cable is adjusted to be within a 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 zip line wire rope reaches the middle anchor point, the composite cable stops traction, 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.

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

[0120] Example 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 sections of the conductor frame have been installed, the pre-buried composite cable ropes extend along the composite cable installation path through the entire conductor frame, the temporary tensioning portal frame located outside the 14H composite cable tensioning platform has been installed, the composite cable limit devices located at the horizontal layers of the 13H, 11H, 7H, and 5H conductor frames are kept in the open state and installed, and the scaffolding at each position of the subsequent composite cable installation steps has been installed;

[0123] (2)Reference Figure 7 , according to the layout drawing, arrange the composite cable drum and a 50kN winch in 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. 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 were installed outside the jacket 1H area. A 150kN winch was responsible for pulling the wire rope sling (specification 28mm wire rope), a 50kN winch was responsible for pulling the composite cable traction rope (specification 16mm wire rope), and a 20kN winch was responsible for pulling the thin wire rope (specification 4mm wire rope). The thin wire rope, sling, and traction wire rope were wound around the three winches respectively. The winches and wire rope fixed pulleys were fixed to the ground using counterweights, steel plates, steel cables, and fixed shackles. Each winch must ensure a restraining force of more than 350kN. After the winches are fixed, they need to be connected to the power supply for testing.

[0125] (4)Reference Figure 9 According to the layout drawing, install the composite cable guide wheel 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 slide cable for guidance. At the same time, install the thin steel wire rope guide wheel.

[0126] (5)Reference Figure 10 According to the layout drawing, install the temporary support for the guide wheel, the guide wheel for the sliding rope and the guide wheel for the traction wire rope at the bottom reinforcement rod structure of the 1H sheet composite cable. The guide wheel is used to guide the sliding rope and the traction wire rope. At the same time, install the guide wheel for 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 on the composite cable tensioning platform, and the end of the traction steel wire rope is temporarily placed on the composite cable guide wheel; the pre-buried rope is removed from the 50kN winch, and then a thin steel wire rope is wound on the winch for use during the installation of the composite cable;

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

[0129] (8)Reference Figure 12 According to the layout drawing, temporary fixed anchor points for the cable are installed on the horizontal layers 5H, 7H, and 11H of the jacket. Each anchor point consists of two sets of manual hoists and cable wire rope anchor shackles connected by slings. Use one set of manual hoists and cable wire rope anchor shackles to cover the cable wire rope, and operate the manual hoist to lift the cable wire rope to the theoretical position shown in the figure.

[0130] (9) Install video surveillance equipment inside the conductor frame 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, tighten 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 at the same time control the 50kN winch to release the thin steel wire rope, and use the 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. It is necessary to 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 slip rope on the scaffold between 14H and 13H, and stop. 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 slip rope connection structure to connect the composite cable sealing cover end buckle with the slip rope; 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 the composite cable moves forward. Then use the composite cable drum reducer to control the tightening and release of the composite cable, minimize the disturbance value of the composite cable and facilitate the installation of the connection structure. Hand winches and slings can be used for assistance 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 are consistent, and 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, and read the cable tension data from the handheld data collector. The maximum value cannot exceed 150kN. The cable winch is 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 rope reaches the temporary anchor point, the composite cable stops traction, and the operator at the temporary anchor point uses another set of hand winches on the sling and the cable rope anchor shackle to cover the cable rope wire rope behind the connection structure, adjusts the hand winch to lift the cable rope, adjusts the installed hand winch to lower the cable rope, loosens the cable rope in front of the connection structure, removes the shackle bolt in front of the connection structure to release the cable rope wire rope, adjusts the hand winch behind the connection structure to make the cable rope 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 anchoring device, the branch cover end anchor chain secondary chain is connected to the 14H composite cable tensioning platform secondary lug, the main anchor chain is temporarily fixed through the tensioning hole, the anchoring device is installed at 1H, the sealing cover end is connected to the anchor chain of the anchoring 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 at the same time, 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, and then used for subsequent composite cable installation;

[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 in ensuring that the limit device supports the composite cable. If the composite cable is far away from the limit device, the cable winch can be reversed to loosen the cable and lower it. At the same time, the connection structure between the composite cable and the cable can be opened to facilitate the installation of the composite cable into the limit device. However, the composite cable must be controlled so that it does not 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 through 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. After tightening, stop and wait. Then reverse the 14H side 50kN winch and slowly retract the 14H fine steel wire rope. As the fine steel wire rope is straightened, the pins 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 disengaged, 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 reinstalls the pre-buried rope.

[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 the 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 zip rope, connect the pre-buried wire with the cable knot at the end of the zip rope steel 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 thin steel wire rope winch, the zip rope steel wire rope winch and the pre-buried wire winch to recover the zip rope steel wire rope and the 1H side thin steel wire rope. After the thin steel wire rope and the zip 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 door frame, composite cable guide wheel and thin wire rope guide wheel at 14H, and use the 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, that is, 28150mm to 62050mm from the end of the zipline 14H, is selected as the comparison section.

[0148] Import the theoretical deflection morphology diagram of the cable at each moment and overlap it with the actual deflection morphology diagram of the cable to compare the difference between the two morphologies. To obtain accurate comparison results, select the comparison section deflection theoretical data and actual measurement data for comparison. Select the deflection data list of several intermediate moments to compare the curve deflection within 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] As shown in the table above, the actual and theoretical values ​​for the measured cable deflection are within 5%. Since the theoretical values ​​are derived from idealized simulations, actual installation parameters such as cable quality, connection structure quality, and test composite cable quality may differ from the theoretical values, leading to potential errors in the calculated results. The final comparison results show that the error range is within 5%, confirming that the theoretical and actual cable deflection forms are generally consistent, with minimal error and a controllable process.

[0152] In summary, compared with the existing technology, 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 slip rope is studied. In order to solve the feasibility of the ICCP composite cable installation scheme for deep-water horizontal conductor frames, the monitoring and risk prevention of the composite cable installation process are strengthened. Based on the three steps of mechanical calculation and three-dimensional simulation, on-site in-situ installation test verification and actual engineering installation application, the stress state of the wire rope slip rope and the traction wire rope during the installation of the composite cable, the local deflection and overall deflection of the composite cable, and the change law of the movement posture of the composite cable during the installation process are studied in detail; through risk identification and prevention and control measures, reasonable risk prevention and control plans and disposal measures are formulated; 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 the theoretical calculation data and field test data to achieve the purpose of optimizing the subsequent engineering installation design.

[0153] The above 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 replacements made by technicians in this field on the basis of the present invention 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 jacket, 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 of each segment is analyzed to obtain the overall deflection diagram of the cable. The overall deflection diagram of the cable is imported into the jacket 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 jacket. Use the traction rope to pull the composite cable along the cable. Monitor the actual deflection and tension of the cable wire rope and the actual deflection of the composite cable when the composite cable passes through the intermediate anchor points. Adjusting the installation parameters according to the actual deflection and tension values ​​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; When performing deflection analysis on each segment and obtaining the overall deflection diagram of the cableway, the following should be included: Using the simulation method, the Line model unit in the Orcaflex software package is used to simulate the cable wire rope. The parameters of the cable wire rope outer diameter, unit length mass, and axial stiffness are defined in the Line model unit. The cable wire rope length is corrected according to the tension at both ends of the cable wire rope, and the deflection value of the cable wire rope is calculated to obtain the first deflection result. The deflection value of the cable wire rope is analyzed and calculated using the formula method and the finite element method, and the second deflection result and the third deflection result are obtained respectively; Calculating an average deflection value for the second and third deflection results, and calculating an error between the first deflection result and the average deflection value. If the error is less than 1%, developing an overall deflection diagram of the cableway using the first deflection result. After obtaining the overall deflection diagram of the zip line, it also includes: Record the current arrangement order of the intermediate anchor points, define extreme parameters under several extreme conditions, and use simulation methods to iteratively calculate the deflection of the cable wire rope and composite cable due to their own weight; When the pre-tension of the cable wire rope is no more 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 an overall deflection diagram of the cable rope is formulated based on this combination; When monitoring the actual deflection and tension of the cable wire rope and the actual deflection of the composite cable as it passes through the intermediate anchor points, 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. 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 composite cable. By hanging markers on the cable wire rope and / or 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 zip line wire rope and the actual deflection value of the composite cable are calibrated into a three-dimensional comparison chart of the overall deflection, the deviation value is evaluated and analyzed, and the installation parameters are adjusted according to the comparison between the deviation value and the deviation safety factor.

2. The installation method according to claim 1, wherein: 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 light source lamp is recovered through the recovery rope to complete the measurement.

3. The installation method according to claim 1, wherein: Connecting tension sensors at both ends of the cable wire rope to detect the tension value of the tension sensors; Start the cable traction winch. When the pre-tensioning force at both ends of the cable wire rope reaches 50 kN, brake the winch and observe the cable state of the cable wire rope for 5 minutes. At the same time, test the winch torque sensor and cable tension sensor. After finding no abnormalities, start the zip line traction winch again, increase the pre-tensioning force of the zip line wire rope to 100kN, and confirm that the zip line wire rope reaches the theoretical height position at each of the intermediate anchor points.

4. The installation method according to claim 3, wherein: When calibrating the overall deflection 3D comparison diagram, also include: Pull the composite cable along the installation direction. When passing the first intermediate anchor point, compare the actual deflection and tension value of the cable wire rope, the actual deflection value of the composite cable, and the first deflection result obtained by the simulation method to evaluate and analyze the deviation value. 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.

5. The installation method according to claim 4, wherein: 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 a first deviation range that meets the first deflection result.

6. The installation method according to claim 5, wherein: 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 traction, and the operator at the middle anchor point uses a set of hand winches on the sling and the zip line wire rope anchor 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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