Method and system for hoisting a permanent cable net support

Abstract

The present application relates to cable supported grid structure technical field, and disclose a kind of hoisting method of permanent cable net support, comprising the following steps: cable net is lifted to preliminary installation configuration;By at least one measure cable, load is applied to cable net;Radial steel beam is changed relative to horizontal plane in multiple times, thereby load is applied to radial cable in cable net in multiple times;After each load is applied, by dynamically adjusting the cable force of measure cable, the configuration of radial cable is matched with the connecting point of preset strut or flying column, and connection is completed;After all connecting points are connected, measure cable is removed, and the final shape finding of radial cable is completed.The purpose is to install the construction method of upper steel structure on flexible cable net based on load superposition, dynamically adjust the way of down-pull tool cable, solve the shape finding problem of multiple support radial unit under the control of single down-pull tool cable.

Description

Technical Field

[0001] This invention relates to the field of cable-supported mesh structure technology, specifically to a method and system for hoisting permanent cable mesh supports. Background Technology

[0002] Due to its excellent mechanical properties and architectural performance, the spoke-type cable-supported grid structure system has been widely used in large-span spatial structures such as stadiums in recent years. The traditional construction method for this type of structure generally adopts the "steel first, cable later" process, that is, first erect a full-span support frame, install the upper rigid grid structure on it, then tension and lift the lower cable net, and finally remove the frame to complete the structural system conversion. With the development of technology, an innovative construction approach of "cable first, steel later" has emerged, that is, first tension and lift the permanent cable net as a temporary support platform, and then hoist the upper steel structure on it. Although this method reduces the reliance on the frame, in practical applications, especially for complex radial cable systems with multiple struts, there is still a lack of reliable and efficient control methods for accurately achieving synchronous shape finding and installation of multiple support points on a flexible and variable cable net support at high altitude.

[0003] Currently, although the "cable-first, steel-later" construction method for single-support points has been implemented in some projects, the form-finding construction of multi-support radial cable nets still faces significant technical challenges: First, the elevation and planar position of multiple strut connection points affect each other, making it difficult to achieve coordinated and synchronous positioning using traditional manual or separate control adjustment methods, resulting in poor construction accuracy and low efficiency; Second, during dynamic hoisting, the cable net shape changes continuously with the load, lacking a real-time monitoring and feedback control mechanism, leading to significant uncertainties and safety risks during installation; Third, to control the multiple shapes, multiple sets of temporary cable measures are often required, resulting in complex measures, high costs, and potential interference with on-site procedures. Therefore, there is an urgent need for a construction method and corresponding control system that can achieve intelligent, accurate, and efficient form-finding for multi-support radial cable nets. Summary of the Invention

[0004] The purpose of this invention is to propose a construction method for installing the upper steel structure on a flexible cable net based on load superposition and dynamic adjustment of the pull-down tooling cable. This method solves the problem of multiple support radial units completing shape finding under the control of a single pull-down tooling cable, and provides a permanent cable net support hoisting method and system.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A method for hoisting a permanent cable net support includes the following steps:

[0007] S10. Lift the cable net to the initial installation position;

[0008] S20. Apply a downward tension to the cable net using at least one support cable;

[0009] S30. The inclination angle of the radial steel beam relative to the horizontal plane is changed multiple times, thereby applying load to the radial cables in the cable net in multiple stages;

[0010] S40. After each load is applied, the cable force of the control cable is dynamically adjusted to match the configuration of the radial cable with the preset strut or fly column connection point, and the connection is completed.

[0011] S50. After all connection points are completed, remove the aforementioned measures cable to complete the final shaping of the radial cable.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the step of changing the radial steel beam inclination angle multiple times in S30 includes: after connecting the end of the radial steel beam to the ring truss, applying a total of six loads to the radial cable with inclination angles of 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree and 0 degrees in sequence.

[0014] The step of completing the connection after each load application includes:

[0015] After applying the first load at a 5-degree inclination angle, the adjustment cable completes the connection of the first strut connection point;

[0016] After applying a second load at a 4-degree inclination angle, the adjustment cable completes the connection of the second strut.

[0017] After applying the third load at a 3-degree inclination angle, the adjustment cable completes the connection of the third strut.

[0018] After applying the fourth load at a 2-degree inclination angle, the adjustment cable completes the connection of the fourth strut.

[0019] After applying the fifth load with an inclination angle of 1 degree, the adjustment cable completes the connection of the fifth strut connection point;

[0020] After applying the sixth load at a 0-degree inclination angle, the adjustment cable was used to complete the connection at the fly post connection point. Furthermore, the force value F applied with each load... i Calculated using the following formula:

[0021] F i =k·ΔL i ·cos(θ i )

[0022] Where k is the stiffness coefficient of the cable, ΔL i Let θ be the change in cable length during the i-th adjustment. i The inclination angle is the angle at which the load is applied for the i-th time.

[0023] During each load application process, the elevation of the strut connection point and the distance between the radial cable are monitored in real time by the ring cable monitoring system until the distance is zero, at which point the connection condition is deemed met. The ring cable monitoring system includes a monitoring prism arranged at the strut connection point and a measuring robot located in the center of the venue, which collects elevation data in real time and transmits it to the data analysis system.

[0024] Furthermore, the ends of the radial steel beams are hinged to the node plates on the ring truss via pin connections. This connection method allows the radial steel beams to achieve continuous changes in the inclination angle under the drive of the hydraulic jacking system. During multiple load applications, the rotation of the hinged supports can reduce the peak bending moment generated in the ring truss due to the increased tension caused by the radial cable design configuration and construction configuration.

[0025] Furthermore, the cable is adjusted by an intelligent hydraulic adjustment device, which receives instructions from a data analysis system to dynamically adjust the cable force. The inclination angle of the radial steel beam is adjusted by a hydraulic jacking system, which is linked with the cable control terminal to achieve precise control of the inclination angle. The form-finding process takes the radial cable design configuration as the target configuration and forms the shape through multiple load superpositions and dynamic adjustments. This method is applied to the hoisting construction of large dome structures or containment structures in nuclear power engineering or large stadium projects.

[0026] A permanent cable net supported hoisting system includes the following modules:

[0027] The ring cable monitoring system is used to monitor the elevation of the strut connection point and the distance to the radial cable in real time;

[0028] The data analysis system is used to process monitoring data and generate control instructions.

[0029] The pull-down cable control terminal is used to receive instructions and control the tension adjustment of the cable.

[0030] A hydraulic tilt adjustment system is used to control the tilt angle of the radial steel beam.

[0031] Intelligent hydraulic adjustment device is used to adjust the tension of the action cable.

[0032] Furthermore, the ring cable monitoring system includes multiple monitoring prisms deployed at the strut connection points and a measuring robot located at the center of the area enclosed by the ring truss, for achieving high-precision data acquisition from multiple angles;

[0033] The cable control terminal and the hydraulic tilt adjustment system communicate and work together via an industrial bus to achieve synchronous and precise control of the cable force and the radial steel beam tilt angle.

[0034] The intelligent hydraulic adjustment device includes a servo hydraulic cylinder, a high-precision tension sensor, and a closed-loop controller, and its cable force adjustment accuracy error is controlled within ±1%.

[0035] The system also includes a remote monitoring platform, which is connected to the cable control terminal to display construction status, cable force, inclination angle and configuration deviation data in real time, and supports both automatic execution and manual intervention modes.

[0036] The system is configured for hoisting large cable-supported grid structures in nuclear power projects or large venue projects where safety requirements are extremely high.

[0037] Furthermore, the data analysis system integrates an intelligent algorithm module for precise control and forward-looking prediction throughout the construction process, including:

[0038] The configuration recognition algorithm module is used for formula-based... Among them, H d and D d These are the design elevation and design distance, respectively, H m and D m The measured values ​​are used to calculate the deviation between the real-time configuration and the design configuration, providing a basis for adjustment of the control terminal.

[0039] The structural deformation prediction module is used for formula-based prediction. Where ΔS is the predicted deformation, α is the deformation coefficient, and F i For the i-th applied load, L i E is the length of the corresponding cable segment, E is the elastic modulus of the cable, and A is the cross-sectional area of ​​the cable. The deformation trend of the cable net during construction is predicted. The deformation coefficient α is obtained by fitting historical construction data or finite element simulation. Its value ranges from 1.0 to 1.5 and is used to correct the deviation between the theoretical model and the actual construction.

[0040] The construction phase simulation module is used to simulate construction before construction begins, based on the following energy minimization principle: Where U is the total potential energy of the system, u is the displacement function, and u i Let U be the displacement of the i-th node. The optimal construction path is determined by minimizing U. Construction simulation is performed to determine the optimal construction path.

[0041] Furthermore, the system is also equipped with multiple monitoring and compensation modules to adapt to complex environments and ensure construction safety, including:

[0042] The cable fatigue monitoring submodule is used to evaluate the fatigue life of the cable based on Miner's linear cumulative damage theory. The cumulative damage degree D is calculated as follows: Where, n jN represents the actual number of cycles under the j-th stress level. j To assess the cumulative fatigue life damage D of the strain cable in order to determine the number of fatigue life cycles under the corresponding stress level;

[0043] The temperature compensation module is used to compensate for cable length changes in real time based on ambient temperature variations. The compensation formula is: ΔL t =K0·β·(T-T0), where ΔL t The length change caused by temperature, L0 is the initial cable length, β is the coefficient of linear expansion, T is the current temperature, T0 is the reference temperature, and the cable length is compensated in real time.

[0044] The seismic response suppression module is used to monitor seismic motion signals during construction and adjust the hydraulic system response using the following transfer function: Where K is the system gain, ξ is the damping ratio, and ω n The natural frequency is denoted by s, and s is a Laplace variable. This function is used to filter out high-frequency vibration components and ensure construction stability.

[0045] Acoustic emission monitoring devices are used to identify microscopic damage to cable nets or connectors during construction. The identification threshold is set according to the following signal-to-noise ratio formula: An alarm is triggered when the SNR exceeds 20dB.

[0046] Furthermore, the system is built upon a hardware and structural foundation and includes:

[0047] The wireless synchronous control network uses a time-division multiple access protocol to coordinate the actions of multiple hydraulic regulating devices, and the time synchronization error is controlled within ±1ms.

[0048] Multiple redundant control channels improve the overall system reliability R. s From formula R s =1-(1-R1)(1-R2) is calculated, where R1 and R2 are the reliability of the main channel and the backup channel, respectively. When the main channel fails, it automatically switches to the backup channel.

[0049] The system operates on a stable foundation provided by the main structure. The ring truss is mounted on the main structure via multiple hinged supports, which are configured to allow the ring truss to undergo minute rotations within a preset range during construction to release internal forces.

[0050] The ring truss serves as the far-end anchorage point and force transmission hub for all radial cables and radial steel beams.

[0051] The measuring robot in the ring cable monitoring system is deployed at the center of the area enclosed by the ring truss, and a measuring coordinate system is established based on it.

[0052] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0053] This invention achieves phased load application by altering the radial steel beam inclination angle, and dynamically adjusts the cable force after each load application. It combines a closed-loop control logic within the hoisting system: a ring cable monitoring system monitors the elevation of the strut connection points and the radial cable distance in real time; a data analysis system processes the data and generates adjustment commands; and an intelligent hydraulic adjustment device precisely executes the cable force adjustment. This overcomes the limitations of traditional manual or individual control adjustments. The real-time data acquisition of the ring cable monitoring system ensures dynamic perception of the positional relationships of multiple support points. The data analysis system quickly generates a coordinated adjustment scheme based on a preset configuration model. The precise execution of the intelligent hydraulic adjustment device enables synchronous response of multiple support points during phased load application, effectively avoiding mutual interference between connection points and significantly improving positioning accuracy and construction efficiency.

[0054] To address the lack of real-time monitoring and feedback control of cable net configuration changes under load during dynamic hoisting, a full-process response mechanism of "real-time monitoring - dynamic analysis - instant adjustment" was constructed: the ring cable monitoring system continuously captures changes in cable net configuration, the data analysis system compares the monitoring data with the preset configuration in real time, and generates adjustment commands immediately upon detecting deviations. The pull cable control terminal and intelligent hydraulic adjustment device respond quickly, and the cable net configuration is corrected in real time through adjustment measures, ensuring that the cable net always approaches the preset support rod or flying column connection point under dynamic loads, significantly reducing the uncertainty of the installation process and fundamentally reducing safety risks.

[0055] To address the issues of complex, costly, and disruptive temporary measures, the use of "at least one temporary measure cable" to control the cable net configuration significantly simplifies the complexity of temporary measures compared to the traditional setup of multiple sets of temporary measures cables. Furthermore, the temporary measure cable only plays a temporary regulatory role during the construction phase and is eventually removed upon completion, avoiding interference with the permanent structure. Combined with the precise control of the radial steel beam inclination angle by the hydraulic tilt adjustment system, the load is applied in stages and in an orderly manner, reducing reliance on temporary measures and further minimizing costs and on-site process interference, thus achieving simplification and economy in the construction process. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the state of the cable net after it has been lifted according to the present invention;

[0057] Figure 2 A schematic diagram of the drop-down tooling system for this invention;

[0058] Figure 3 This is a schematic diagram of the connection between the radial steel beam and the ring truss of the present invention;

[0059] Figure 4This is a schematic diagram illustrating the application of a second load to the present invention;

[0060] Figure 5 This is a schematic diagram showing the application of the third load to the present invention;

[0061] Figure 6 This is a schematic diagram showing the application of the fourth load in this invention;

[0062] Figure 7 This is a schematic diagram showing the application of the fifth load in this invention;

[0063] Figure 8 This is a schematic diagram showing the application of the sixth load in this invention;

[0064] Figure 9 This is a schematic diagram showing the completed construction of the present invention;

[0065] Figure 10 This is a block diagram of the control system of the present invention;

[0066] Figure 11 This is a schematic diagram of the cable control of the present invention.

[0067] In the diagram: 1. Main structure; 2. Hinge support; 3. Ring truss; 4. Radial cable design configuration; 5. Radial cable construction configuration; 6. Utility cable; 7. Radial steel beam; 8. Connection point of the first strut; 9. Connection point of the second strut; 10. Connection point of the third strut; 11. Connection point of the fourth strut; 12. Connection point of the fifth strut; 13. Connection point of the flying column. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] A method for hoisting a permanent cable net support includes the following steps:

[0070] S10. Lift the cable net to the initial installation position;

[0071] S20. Apply a downward tension to the cable net using at least one of the auxiliary cables 6;

[0072] S30. Change the inclination angle of the radial steel beam 7 relative to the horizontal plane in multiple stages, thereby applying loads to the radial cables in the cable net in multiple stages;

[0073] S40. After each load is applied, the cable force of the measure cable 6 is dynamically adjusted to match the configuration of the radial cable with the preset strut or fly column connection point, and the connection is completed.

[0074] S50. After all connection points are completed, remove measure cable 6 to complete the final shape finding of the radial cable.

[0075] By applying loads in stages and dynamically adjusting the tension of the auxiliary cables, the superstructure can be precisely installed on the flexible cable net. This method includes five main steps: initial positioning of the cable net, applying downward tension through the auxiliary cables, changing the radial steel beam inclination angle in stages to apply loads, dynamically adjusting the cable tension to match the connection points, and finally removing the auxiliary cables to complete the shape finding. This method solves the problem of synchronous shape finding of multi-support cable nets on high-altitude flexible supports through step-by-step loading and real-time adjustment. It is especially suitable for the construction of large domes or containment structures in nuclear power projects or large stadium projects.

[0076] The instantaneous spatial configuration of the cable net after it has been lifted as a whole by traction cable 7, before any external adjustments are made. Due to factors such as the cable net's own weight, traction force distribution deviation, and installation errors, its actual spatial coordinates, including the elevation, planar position, and cable force values ​​of the radial cables, exhibit systematic deviations from the radial cable design configuration 4 determined beforehand through structural design. Specifically:

[0077] Elevation deviation: The actual elevation of the cable net as a whole or in some areas is generally higher than the design elevation, which needs to be corrected by applying downward tension through measure cable 6;

[0078] Planar position deviation: The projected position of the cable net node in the horizontal direction deviates from the design configuration and needs to be gradually corrected through subsequent load application process;

[0079] Non-uniform cable force distribution: some cable segments are in a relaxed state, while others are over-tensioned and exceed the design cable force range.

[0080] This state is the initial condition of the construction process. Its deviation needs to be gradually eliminated through the coordinated operation of applying loads in stages and dynamically adjusting cable forces in subsequent steps, so that the cable net configuration eventually converges to the design target state.

[0081] The steps in S30 to change the inclination angle of the radial steel beam 7 in multiple stages include: after connecting the end of the radial steel beam 7 to the ring truss 3, applying a total of six loads to the radial cable in sequence with inclination angles of 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree and 0 degrees.

[0082] The steps to complete the connection after each applied load include:

[0083] After applying the first load at a 5-degree inclination angle, the adjustment cable 6 completes the connection of the first strut connection point 8;

[0084] After applying a second load at a 4-degree inclination angle, the adjustment cable 6 completes the connection of the second strut connection point 9;

[0085] After applying the third load at a 3-degree inclination angle, the adjustment cable 6 completes the connection of the third strut connection point 10;

[0086] After applying the fourth load at a 2-degree inclination angle, the adjustment cable 6 completes the connection of the fourth strut connection point 11;

[0087] After applying the fifth load with an inclination angle of 1 degree, the adjustment cable 6 completes the connection of the fifth strut connection point 12;

[0088] After applying the sixth load at a 0-degree inclination angle, the adjusting cable 6 completes the connection of the flying column connection point 13. This clearly stipulates that the radial steel beam is loaded in six stages at inclination angles of 5°, 4°, 3°, 2°, 1°, and 0°, with the adjusting cable completing the connection of the corresponding strut or flying column connection point after each loading. This specific sequence embodies the construction logic of gradual load transfer and gradual deformation control, which is crucial for achieving precise form finding.

[0089] The design basis and cable tension adjustment targets for the inclination angle sequence of 5°, 4°, 3°, 2°, 1°, and 0° can be supplemented as follows:

[0090] Design basis of tilt sequence:

[0091] The inclination gradient was determined through finite element construction simulation and structural optimization analysis. Specifically: internal force distribution optimization: by establishing a coupled finite element model of cable net-strut-radial steel beam, the load transfer path and internal force distribution of the cable net under different inclination angles were simulated. The analysis shows that using a progressively decreasing inclination angle sequence instead of an equal gradient or random sequence can ensure a smooth transfer of load from the ring truss 3 to the radial cable design configuration 4 and radial cable construction configuration 5, avoiding sudden stress changes in local cable segments and controlling the maximum stress concentration factor below 1.5.

[0092] Configuration convergence efficiency: Construction simulation shows that this sequence can quickly converge the cable net configuration to the design state with a minimum of 6 loading cycles, and the configuration adjustment after each loading cycle is within the controllable range of the hydraulic system.

[0093] Equipment operational feasibility: The tilt gradient design takes into account the stroke accuracy and response speed of the hydraulic jacking system, ensuring a smooth tilt adjustment process without overshoot.

[0094] The specific objectives of the cable adjustment are:

[0095] After each loading, the tension adjustment of cable 6 must ensure that the deviation between the current connection point elevation and the design elevation is controlled within ±5mm, and the relative elevation difference between adjacent strut connection points does not exceed 3mm. This target value is determined based on the following factors:

[0096] Connector tolerance: The machining accuracy of the pin connection hole at the end of the strut is ±2mm, and a 5mm deviation margin is reserved to ensure that the pin can be smoothly inserted;

[0097] Monitoring system accuracy: The ranging accuracy of the measuring robot in the loop monitoring system is ±1mm, and it can stably identify deviations of 5mm.

[0098] Structural safety redundancy: Finite element analysis shows that when the elevation deviation is ≤5mm, the maximum additional stress of the cable net does not exceed 5% of the design allowable stress, avoiding the risk of overload. The tilt sequence and deviation control targets need to be calibrated through iterative simulation before construction, for example, by adjusting the tilt gradient or cable force threshold, to adapt to the differences in cable net span, cable diameter, and load in specific projects. The calibrated parameters should be entered into the cable control terminal as the basis for the operation of the intelligent hydraulic adjustment device.

[0099] The force F applied for each load i Calculated using the following formula:

[0100] F i =k·ΔL i ·cos(θ i )

[0101] Where k is the stiffness coefficient of the cable, ΔL i Let θ be the change in cable length during the i-th adjustment. i The inclination angle is the angle at which the load is applied for the i-th time.

[0102] During each load application process, the elevation of the strut connection point and the distance between it and the radial cable are monitored in real time through the ring cable monitoring system. The connection condition is deemed met when the distance is zero. The ring cable monitoring system includes a monitoring prism placed at the strut connection point and a measuring robot located in the center of the venue. It collects elevation data in real time and transmits it to the data analysis system. The force calculation formula clarifies that the force value of each loading is proportional to the stiffness of the cable, the change in length, and the cosine of the inclination angle. At the same time, it also defines the composition and working principle of the ring cable monitoring system, namely, to collect elevation data in real time through the monitoring prism and the measuring robot, and to determine that the connection condition is met when the distance between the elevation and the radial cable is zero, thus ensuring the accuracy and controllability of the construction process.

[0103] The value of the stiffness coefficient k needs to be determined through dual verification using cable axial tensile tests and design specifications. The specific process is as follows:

[0104] Test measurements:

[0105] Samples were cut from the same batch of cable materials, axial tensile tests were conducted, load-displacement curves were recorded, and elastic modulus E and effective cross-sectional area A were calculated.

[0106] Based on the actual length L of the cable segment, according to the formula Calculate the actual stiffness coefficient of the cable segment.

[0107] Standard verification:

[0108] Referring to Article 4.2.3 of the "Technical Specification for Cable Structures" JGJ257-2012, the test values ​​were corrected, taking into account the stiffness reduction caused by cable strand torsion effect and anti-corrosion coating, and the final value was taken as... The reduction factor is based on engineering experience and standard recommendations. For ultra-long cables with a length >100m, the sag effect needs to be considered in addition, and the stiffness value is corrected using the Ernst formula.

[0109] Closed-loop control of data transmission and processing flow in the monitoring system:

[0110] Data collection:

[0111] A measurement robot, such as the Leica TS60, acquires the three-dimensional coordinates of the monitoring prism at a frequency of 1Hz and calculates the elevation H of the strut connection point in real time using a built-in algorithm. m Distance D from radial cable m ;

[0112] Data is transmitted to the data analysis system via a wireless bridge using the IEEE 802.11ac protocol.

[0113] Data processing and deviation calculation:

[0114] After receiving the data, the data analysis system calls the configuration recognition algorithm module and applies the formula. Calculate the real-time configuration deviation δ;

[0115] If δ > 5 mm, the system generates adjustment commands including the target cable force value F. i And adjust the direction.

[0116] Command execution and feedback:

[0117] The adjustment command is sent to the cable control terminal via industrial Ethernet;

[0118] The control terminal drives the intelligent hydraulic adjustment device, which includes a servo hydraulic cylinder and a tension sensor, to adjust the cable force. At the same time, it monitors the actual cable force value in real time and feeds it back to the data analysis system.

[0119] The system compares the target value with the actual value. If the error exceeds ±1%, it triggers a secondary adjustment until the accuracy requirement is met.

[0120] This process forms a closed-loop control of "monitoring-analysis-adjustment-feedback," with each adjustment cycle not exceeding 10 seconds, ensuring that the cable net configuration dynamically converges to the design state during construction. It should also be noted that the stiffness coefficient k needs to be calculated separately for different cable segments and entered into the system database for real-time retrieval. An outlier filtering mechanism, such as Kalman filtering, must be set up in the closed-loop control to avoid erroneous adjustments due to instantaneous vibration or measurement noise.

[0121] The ends of the radial steel beam 7 are hinged to the node plates on the ring truss 3 via pin connections. This connection method allows the radial steel beam 7 to achieve continuous changes in tilt angle under the drive of the hydraulic jacking system. During multiple load applications, the rotation of the hinged support 2 can reduce the peak bending moment generated in the ring truss 3 due to the increased tension of the radial cable design configuration 4 and the radial cable construction configuration 5. This dictates that the connection method between the radial steel beam and the ring truss is a pin hinge, and explains that this connection method allows the radial steel beam to achieve continuous changes in tilt angle under the drive of the hydraulic jacking system. Furthermore, it is pointed out that the rotation of the hinged support can reduce the peak bending moment in the ring truss, demonstrating the structural design's adaptive optimization to the construction process.

[0122] The hinged support employs a two-way hinged joint to release bending moments in multiple directions. The tilt adjustment accuracy of the hydraulic jacking system can reach ±0.1° to ensure accurate load application.

[0123] The cable 6 is adjusted via an intelligent hydraulic adjustment device, which receives instructions from a data analysis system to dynamically adjust the cable force. The inclination angle of the radial steel beam 7 is adjusted via a hydraulic jacking system, which is linked with the lower cable control terminal to achieve precise control of the inclination angle. The form-finding process uses the radial cable design configuration 4 as the target configuration, and achieves the desired shape through multiple load superpositions and dynamic adjustments. This method is applied to the hoisting construction of large dome structures or containment structures in nuclear power engineering or large stadium projects. The overall system control and execution mechanism is summarized, including the adjustment of the cable via an intelligent hydraulic adjustment device and the adjustment of the radial steel beam inclination angle via a hydraulic jacking system. It emphasizes that the form-finding process uses the design configuration as the target, and achieves the desired shape through multiple load superpositions and dynamic adjustments. Furthermore, it clarifies that this method is applicable to the hoisting of large structures in nuclear power engineering or large stadium projects.

[0124] Specific composition of intelligent hydraulic regulating device

[0125] The intelligent hydraulic regulating device is an electromechanical-hydraulic integrated actuator, specifically including the following core components:

[0126] Servo motor: A high-precision AC servo motor with a rated torque of 20 N·m and a repeatability of ±0.01° is adopted. It is directly connected to the hydraulic pump through a coupling and is used to precisely control the hydraulic oil output flow.

[0127] Pressure sensor: Installed at the inlet and outlet of the hydraulic cylinder, it adopts a piezoresistive pressure sensor to monitor the hydraulic pressure in real time and convert it into cable force value;

[0128] PLC controller: It adopts a modular PLC with built-in PID control algorithm, receives digital instructions from the data analysis system and outputs analog signals to the servo driver;

[0129] Servo hydraulic cylinder: Double-acting hydraulic cylinder with a stroke of 500mm, built-in LVDT displacement sensor, and the piston rod end is connected to the cable through a universal joint;

[0130] Safety redundancy module: including mechanical relief valve, emergency manual pump and accumulator, to ensure that the system can still maintain a safe state in the event of electrical control failure.

[0131] The system achieves fully automated construction through the following three-tier architecture:

[0132] Monitoring layer:

[0133] The ring cable monitoring system collects the coordinate data of the strut connection point at a frequency of 10Hz and transmits it to the data analysis system through a 5G industrial CPE module; the pressure sensor built into the intelligent hydraulic adjustment device provides real-time feedback of the cable force value at a sampling frequency of 100Hz.

[0134] Analysis layer:

[0135] The data analysis system uses digital twin technology to compare real-time data with the BIM model and generates instructions through the following algorithms:

[0136] Control layer:

[0137] The PLC controller receives instructions to drive the servo motor to adjust the stroke of the hydraulic cylinder; the system compares the target cable force with the actual cable force in real time, and automatically triggers a correction cycle when the error exceeds ±1%; the remote monitoring platform displays real-time data curves and control status, and supports one-click switching between automatic and manual modes.

[0138] It should also be noted that: all hydraulic lines use a combination of stainless steel rigid pipes and high-pressure hoses to reduce pressure fluctuations; the PLC program has reserved interfaces for connecting third-party monitoring equipment such as anemometers and vibration sensors; system operation data is automatically stored to a cloud platform, supporting big data analysis during later construction phases.

[0139] A permanent cable net supported hoisting system includes the following modules:

[0140] The ring cable monitoring system is used to monitor the elevation of the strut connection point and the distance to the radial cable in real time;

[0141] The data analysis system is used to process monitoring data and generate control instructions.

[0142] The pull-down cable control terminal is used to receive instructions and control the cable tension adjustment of cable 6;

[0143] A hydraulic tilt adjustment system is used to control the tilt angle of the radial steel beam 7.

[0144] Intelligent hydraulic adjustment device is used to adjust the tension of the action cable.

[0145] This system achieves intelligent, precise, and automated construction processes through the collaborative work of multiple modules. Industrial Ethernet or wireless communication technology is used between modules to ensure the real-time and reliable transmission of data. The system also features redundancy design and fault self-diagnosis function to improve system stability and security.

[0146] The ring cable monitoring system includes multiple monitoring prisms deployed at the strut connection points and a measuring robot located at the center of the area enclosed by the ring truss 3, used to achieve high-precision data acquisition from multiple angles;

[0147] The cable control terminal and the hydraulic tilt adjustment system communicate and work together via an industrial bus to achieve synchronous and precise control of the cable force and the radial steel beam tilt angle.

[0148] The intelligent hydraulic adjustment device includes a servo hydraulic cylinder, a high-precision tension sensor, and a closed-loop controller, and its cable force adjustment accuracy error is controlled within ±1%.

[0149] The system also includes a remote monitoring platform that is connected to the cable control terminal to display construction status, cable force, inclination angle and configuration deviation data in real time, and supports both automatic execution and manual intervention modes.

[0150] The system is configured for hoisting large cable-supported grid structures in nuclear power projects or large stadium projects where safety requirements are extremely high. It specifically describes the components of the ring cable monitoring system, including the monitoring prism and measuring robot, communication methods, intelligent hydraulic adjustment devices, and the functions of the remote monitoring platform. These limitations enhance the system's feasibility and operability.

[0151] The surveying robot utilizes a Leica TS60 ultra-high precision total station, with the following performance parameters: Measurement accuracy: Angle measurement accuracy: ±0.5″, Distance measurement accuracy: ±0.6mm +1ppm. Employing prism mode, the three-dimensional coordinate accuracy of the point is ±1mm@100m. The tracking mode is 10Hz continuous automatic prism tracking, and the high-speed scanning mode is 30Hz for intensive monitoring during critical construction phases. The effective identification distance is 1000m, and it can simultaneously and automatically track up to 16 prisms covering all strut connection points. Its operating temperature range is -20℃ to +50℃, and it has an IP65 dustproof and waterproof protection rating. It features a built-in dual-axis compensator with a compensation range of ±6′, ensuring measurement stability in harsh construction environments. It supports Gigabit Ethernet, Wi-Fi 6, and 5G modules, with a data transmission latency of <10ms.

[0152] The platform achieves 3D visualization and decision support through the following methods: It constructs a digital twin of the cable net based on the BIM model, and links it in real-time with data from the surveying robot; the model supports LOD3 accuracy and includes detailed components such as cable segments, nodes, and struts; it employs color gradient mapping technology: green: deviation ≤ ±3mm (meets requirements); yellow: deviation ±3 to 5mm (warning status); red: deviation > ±5mm (requires immediate intervention). Deviation data is overlaid on the 3D model surface in the form of a cloud map, supporting multi-view section analysis and real-time display of key parameters: cable force curve, inclination angle change trend, and ambient temperature and humidity; out-of-limit parameters automatically flash alarm and push notifications to mobile terminal APP / SMS; operators can click on any cable in the model, manually input the target cable force value, and the system automatically generates adjustment instructions; it also supports construction process retrospection, allowing for the retrieval of model status at any historical time point for comparative analysis.

[0153] The data analysis system integrates intelligent algorithm modules for precise control and forward-looking prediction throughout the construction process, including:

[0154] The configuration recognition algorithm module is used for formula-based... Among them, H d and D d These are the design elevation and design distance, respectively, H m and D m The measured values ​​are used to calculate the deviation between the real-time configuration and the design configuration, providing a basis for adjustment of the control terminal.

[0155] The structural deformation prediction module is used for formula-based prediction. Where ΔS is the predicted deformation, α is the deformation coefficient, and F i For the i-th applied load, L iE is the length of the corresponding cable segment, E is the elastic modulus of the cable, and A is the cross-sectional area of ​​the cable. The deformation trend of the cable net during construction is predicted. The deformation coefficient α is obtained by fitting historical construction data or finite element simulation. Its value ranges from 1.0 to 1.5 and is used to correct the deviation between the theoretical model and the actual construction.

[0156] The construction phase simulation module is used to simulate construction before construction begins, based on the following energy minimization principle: Where U is the total potential energy of the system, u is the displacement function, and u i Let E be the displacement of the i-th node, E be the elastic modulus of the cable, A be the cross-sectional area of ​​the cable, and F be the displacement of the ith node. i For the i-th applied load, construction simulation is performed based on the principle of minimizing U to determine the optimal construction path. This involves introducing intelligent algorithm modules, including configuration recognition algorithms, structural deformation prediction algorithms, and construction stage simulation algorithms. These algorithms, through mathematical models and simulation technology, achieve precise control and forward-looking prediction of the construction process, further enhancing the system's intelligence level.

[0157] The intelligent algorithm module achieves precise control and forward-looking prediction throughout the entire construction process through the following steps:

[0158] Dynamic optimization process for deformation coefficient α:

[0159] Initial assignment: Based on finite element simulation and material properties, the initial deformation coefficient α is taken as an empirical value of 1.2;

[0160] Data acquisition: Recording load values ​​F in real time during construction. i Cable segment length L i and actual deformation ΔS actual ;

[0161] Machine learning optimization:

[0162] A Gaussian process regression model is used, with historical construction data such as load, cable length, and ambient temperature as inputs and actual deformation as output, to train the deformation prediction model. After each construction stage is completed, the model is updated with new data, and the deformation coefficient α is refitted to converge to a more accurate value, with the range narrowed to 1.0 to 1.3. Feedback mechanism: The optimized α value is fed back to the structural deformation prediction module in real time for deformation calculation in subsequent construction stages.

[0163] Real-time correction of the configuration recognition algorithm:

[0164] The robot's coordinate and tilt sensor readings are fused using a Kalman filter algorithm to eliminate measurement noise and instantaneous vibration interference; smoothed configuration deviation data is output every 5 seconds to ensure that control commands are generated based on stable data.

[0165] Parallel computing acceleration techniques:

[0166] Distributed computing architecture: The finite element model is split into multiple subdomains such as cable nets, struts, and ring trusses, and deployed on a high-performance computing cluster; Parallel solver: The PETSc parallel solver is used to realize the parallel assembly and solution of the stiffness matrix; Computational efficiency: The traditional simulation time of 72 hours is shortened to less than 4 hours, supporting the comparison of multiple schemes before construction.

[0167] Precision control measures:

[0168] Adaptive mesh refinement: Automatically refines the mesh in stress concentration areas, such as near strut connection points, ensuring stress calculation error <5%; Energy error estimation: Based on formula Evaluate the simulation accuracy; if e > 2%, automatically trigger mesh re-division. Verify the measured data: compare the simulation results with the construction data of the previous test section and correct the constitutive model parameters.

[0169] Real-time simulation driven by digital twins:

[0170] During construction, real-time monitoring data such as cable force and temperature are input into the updated simulation model to dynamically predict the configuration and internal force changes in subsequent construction stages. The deviation between the prediction results and the measured data is continuously used to correct the model parameters, forming a closed-loop optimization of "simulation-construction-calibration".

[0171] The system is also equipped with multiple monitoring and compensation modules to adapt to complex environments and ensure construction safety, including:

[0172] The cable fatigue monitoring submodule is used to evaluate the fatigue life of the cable based on Miner's linear cumulative damage theory. The cumulative damage degree D is calculated as follows: Where, n j N represents the actual number of cycles under the j-th stress level. j To assess the cumulative fatigue life damage D of the strain cable in order to determine the number of fatigue life cycles under the corresponding stress level;

[0173] The temperature compensation module is used to compensate for cable length changes in real time based on ambient temperature variations. The compensation formula is: ΔL t =L0·β·(T-T0), where ΔL t The length change caused by temperature, L0 is the initial cable length, β is the coefficient of linear expansion, T is the current temperature, T0 is the reference temperature, and the cable length is compensated in real time.

[0174] The seismic response suppression module is used to monitor seismic motion signals during construction and adjust the hydraulic system response using the following transfer function: Where K is the system gain, ξ is the damping ratio, and ω nHere, s is the natural frequency, s is the Laplace variable, and H(s) is the system transfer function. This function is used to filter out high-frequency vibration components and ensure construction stability.

[0175] Acoustic emission monitoring devices are used to identify microscopic damage to cable nets or connectors during construction. The identification threshold is set according to the following signal-to-noise ratio formula: An alarm is triggered when the SNR exceeds 20dB. SNR is the signal-to-noise ratio, measured in decibels (dB). signal For signal power, P noise To mitigate noise power, multiple monitoring and compensation modules have been added, including cable fatigue monitoring, temperature compensation, seismic response suppression, and acoustic emission monitoring. These modules ensure the safety and stability of the construction process by monitoring and compensating for changes in the external environment and the internal state of the structure in real time.

[0176] Specific implementation details of the temperature compensation module

[0177] Sensor placement scheme:

[0178] Temperature measurement point layout: A DS18B20 digital temperature sensor with an accuracy of ±0.5℃ is arranged every 30 meters along the perimeter of the cable net. Redundant measurement points are added at the anchor points of the ring truss 3 and radial cable 4, and at the tensioning end of the tension cable 6, for a total of no less than 50 temperature measurement points. Installation method: The sensor adopts a stainless steel armored shell, which is tightly attached to the surface of the cable body by thermally conductive silicone pads. The outside is covered with a reflective heat insulation layer aluminum foil composite film to avoid interference from solar radiation. Data acquisition: Temperature data is transmitted to the gateway through a ZigBee wireless sensor network at 10-second intervals, and then uploaded to the data analysis system via 5GCPE.

[0179] Data processing algorithms:

[0180] Real-time compensation calculation:

[0181] Compensation calculation is performed every 5 minutes:

[0182]

[0183] Where w i The weighting coefficients are allocated inversely proportional to the distance between the measuring point and the current adjustment cable segment, T. 0,i The initial ambient temperature for construction is taken as 20℃ for reference.

[0184] Outlier handling:

[0185] A sliding window filter with a window width of 10 minutes is used to remove instantaneous abnormal temperature values. If the data exceeds the tolerance for 3 consecutive cycles, a sensor fault alarm is triggered.

[0186] Delayed compensation:

[0187] Considering the thermal inertia of the cable, a first-order hysteresis model L is introduced. t,actual =ΔL t ·(1-e -t / τ The time constant τ was determined to be 8 minutes through experiments, and the compensation command was issued in stages.

[0188] Control strategy of earthquake response suppression module

[0189] Adaptive control architecture:

[0190] The Model Reference Adaptive System (MRACS) is used, with the second-order mass-damped-spring system as the reference model, to adjust the parameters of the hydraulic system transfer function H(s) in real time.

[0191] Reference model transfer function:

[0192]

[0193] Where ω n ξ is dynamically set based on the structural fundamental frequency through FFT analysis.

[0194] Parameter dynamic adjustment strategy:

[0195] Frequency tracking:

[0196] Vibration signals are acquired in real time using a triaxial accelerometer mounted on the ring truss. An FFT analysis is performed every 0.1 seconds to extract the dominant frequency f. d

[0197] Parameter mapping:

[0198] Establish query table association f d With optimal control parameters:

[0199] f d <2Hz low-frequency oscillation: Increase the damping ratio ξ to 0.8 and decrease the system gain K to 0.7;

[0200] 2Hz≤f d ≤5Hz resonance risk zone: set ξ=0.5, K=1.0, natural frequency ω n =2πf d ;

[0201] f d >5Hz high-frequency vibration: reduce ξ to 0.3 to filter out irrelevant high-frequency noise;

[0202] An adaptive law is designed based on Lyapunov stability theory, and K, ξ, ω are continuously adjusted. n This causes the actual response to converge to the reference model.

[0203] Control parameters are sent to the servo hydraulic system via PLC to adjust the flow and pressure output of the hydraulic cylinder;

[0204] If the system detects that the safety threshold is exceeded for more than 5 seconds, it will automatically trigger emergency protection, which involves hydraulic locking and temporary tensioning of the safety cable.

[0205] It should also be noted that the temperature compensation module needs to be calibrated on-site before construction: a cable length-temperature change curve is established through heating tests to correct the linear expansion coefficient β; the earthquake suppression module is linked with the local earthquake monitoring network to obtain early warning information 3 to 5 seconds in advance and start the pre-control mode.

[0206] The system is built upon a hardware and structural foundation and includes:

[0207] The wireless synchronization control network uses the Time Division Multiple Access (TDMA) protocol to coordinate the actions of multiple hydraulic adjustment devices, and the time synchronization error is controlled within ±1ms.

[0208] Multiple redundant control channels improve the overall system reliability R. s From formula R s =1-(1-R1)(1-R2) is calculated, where R1 and R2 are the reliability of the main channel and the backup channel, respectively. When the main channel fails, it automatically switches to the backup channel.

[0209] The system operates on a stable foundation provided by the main structure 1. The ring truss 3 is installed on the main structure 1 through multiple hinged supports 2, and the hinged supports 2 are configured to allow the ring truss 3 to undergo small rotations within a preset range during construction to release internal forces.

[0210] The ring truss 3 serves as the far-end anchorage point and force transmission hub for all radial cables and radial steel beams 7.

[0211] The measuring robot in the ring cable monitoring system is deployed at the center of the area enclosed by the ring truss 3, and a measuring coordinate system is established based on it. This coordinate system defines the hardware and structural foundation of the system, including the wireless synchronous control network, multiple redundant control channels, and the specific construction of the main structure, ring truss, and hinged supports. These constraints ensure the reliability and stability of the system in complex environments.

[0212] The wireless synchronization control network uses a time-triggered protocol as its core communication protocol, and ensures the determinism of data transmission through the following mechanisms:

[0213] Communication scheduling table design:

[0214] The communication cycle is divided into a fixed time window with a cycle length of 10ms, and each hydraulic regulating device is allocated a dedicated time slot, such as 0.5ms / node. The time slot allocation is based on a topology optimization algorithm to ensure that key nodes such as the main control PLC and hydraulic actuators occupy the low-latency window first.

[0215] Clock synchronization mechanism:

[0216] Employing the IEEE 1588 Precision Time Protocol (PTP), the master clock node is integrated into the pull-down cable control terminal, sending a synchronization message every second. The slave node hydraulic adjustment device controller corrects the local clock, achieving a synchronization accuracy of ±1μs. Redundant clock source: Equipped with a GPS module and a rubidium atomic clock for dual backup to prevent master clock failure.

[0217] Deterministic transmission guarantee:

[0218] Data frames are appended with timestamps and sequence numbers. The receiving end follows strict timing parsing instructions and discards frames that time out > 2ms or are out of order. Critical instructions such as emergency stop signals use dual-band redundant transmission of 2.4GHz + 5.8GHz to avoid interference from a single frequency band.

[0219] Network fault-tolerant design:

[0220] The channel quality index (RSSI) and bit error rate are periodically checked. If the index exceeds the limit for three consecutive cycles, the system automatically switches to the backup channel and the pre-configured frequency hopping sequence.

[0221] Switching logic and fault handling process for multiple redundant control channels

[0222] Channel monitoring mechanism: The primary and backup channels exchange heartbeat messages with CRC check every 50ms. If the backup channel does not receive the primary channel heartbeat for 5 consecutive times, the primary channel is judged to be faulty. Each channel controller monitors its own hardware status in real time, including CPU load, memory usage, and power supply voltage. When abnormalities occur, it actively sends a fault code to the arbitration module.

[0223] Switching logic:

[0224] A priority-based arbitration strategy is adopted: the main channel has a default priority of 1 for controlling the output, and the backup channel has a priority of 2 for real-time synchronization of the main channel status; the arbitration module is implemented independently on an FPGA, and after detecting a main channel fault, it completes the transfer of control within 10ms and locks the main channel output;

[0225] Seamless handover guarantee:

[0226] Before switching to the backup channel, the latest control parameters, such as PID output values ​​and cable force target values, are preloaded to avoid command jumps.

[0227] Fault Handling Procedure: Level 1 Fault: Instantaneous Communication Interruption: Enable instruction buffer pool depth of 50, continue execution according to the last valid instruction, and attempt to rebuild the connection; Level 2 Fault: Hardware Failure: Switch to backup channel and trigger alarm signal (audio-visual + mobile push), maintenance personnel must confirm on-site within 15 minutes; Level 3 Fault: Simultaneous Failure of Both Channels: Activate safety mode: All hydraulic adjustment devices lock to their current position, measure cable 6 maintains the current cable force by mechanical relief valve, and the system stands by until manual intervention.

[0228] Quantitative verification of reliability:

[0229] Overall system reliability R s Failure Mode and Effects Analysis (FMEA) verified that the mean time between failures (MTBF) for a single channel is ≥100,000 hours; under a dual-redundancy architecture, R... s =1-(1-R1)(1-R2)≥0.999999 meets the safety level requirements.

[0230] The hydraulic action synchronization error has been reduced from ±5ms to ±0.5ms, avoiding configurational distortion caused by asynchronous adjustment of multiple cable forces. The time from fault detection to complete switching is <15ms, far exceeding the human response limit of >200ms. The dual redundancy design reduces the annual unexpected downtime to <5 minutes.

[0231] It should also be noted that the TTP protocol stack is embedded in the FPGA chip to avoid communication interruption due to software system crashes. The heartbeat message carries an encrypted signature of AES-128 to prevent malicious nodes from injecting false fault signals. All switching events are recorded in the black box non-volatile memory to support post-fault tracing.

[0232] This invention first uses traction cables to lift the cable net to its initial installation position, at which point the actual position deviates from the design position. Then, a mantle is installed at the end of the radial cables and a downward force is applied, causing the cable net to shift downwards. Next, the radial steel beams are hinged to the ring truss, and a hydraulic jacking system controls the application of loads to the radial cables in six stages at inclination angles of 5°, 4°, 3°, 2°, 1°, and 0°. After each loading, the mantle tension is dynamically adjusted using an intelligent hydraulic adjustment device to control the deviation between the strut connection point elevation and the design elevation within ±5mm, and the six connection points are fixed sequentially. Throughout the process, a ring cable monitoring system collects positional data in real time, and a data analysis system calculates the deviation using intelligent algorithms and generates control commands, achieving closed-loop control of "monitoring-analysis-adjustment." Finally, after all connection points are fixed, the mantle is removed, completing the precise alignment of the cable net. This system, through the integration of wireless synchronous control, multiple redundant channels, and temperature / seismic compensation modules, achieves high-precision, fully automated construction of large structures.

[0233] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0234] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for hoisting a permanent cable net support, characterized in that, Includes the following steps: S10. Lift the cable net to the initial installation position; S20. Apply a downward force to the cable net through at least one of the measures cables (6); S30. Change the inclination angle of the radial steel beam (7) relative to the horizontal plane in multiple stages, thereby applying load to the radial cables in the cable net in multiple stages; S40. After each load is applied, the cable force of the measure cable (6) is dynamically adjusted so that the configuration of the radial cable matches the preset strut or flying column connection point, and the connection is completed. S50. After all connection points are connected, remove the measure cable (6) to complete the final shape finding of the radial cable; The steps of changing the inclination angle of the radial steel beam (7) in S30 include: after connecting the end of the radial steel beam (7) to the ring truss (3), applying a total of six loads to the radial cable with inclination angles of 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree and 0 degrees in sequence; The step of completing the connection after each load application includes: After applying the first load at a 5-degree inclination angle, the adjustment cable (6) is used to complete the connection of the first strut connection point (8); After applying a second load at a 4-degree inclination angle, adjust the measures cable (6) to complete the connection of the second strut connection point (9); After applying the third load at a 3-degree inclination angle, the adjustment cable (6) completes the connection of the third strut connection point (10); After applying the fourth load with an inclination angle of 2 degrees, the adjustment cable (6) is used to complete the connection of the fourth strut connection point (11); After applying the fifth load with an inclination angle of 1 degree, the adjustment cable (6) is used to complete the connection of the fifth strut connection point (12); After applying the sixth load at a 0-degree inclination angle, the adjustment cable (6) is used to complete the connection of the flying column connection point (13); Force value applied for each load Calculated using the following formula: in, Let be the stiffness coefficient of the cable. For the first Change in cable length during each adjustment For the first Inclination angle when the load is applied for the first time; During each load application process, the elevation of the strut connection point and the distance between the radial cable are monitored in real time by the ring cable monitoring system until the distance is zero, at which point the connection condition is deemed met. The ring cable monitoring system includes a monitoring prism arranged at the strut connection point and a measuring robot located in the center of the venue, which collects elevation data in real time and transmits it to the data analysis system. The cable (6) is adjusted by an intelligent hydraulic adjustment device. The intelligent hydraulic adjustment device receives instructions from the data analysis system to dynamically adjust the cable force. The inclination angle of the radial steel beam (7) is adjusted by a hydraulic jacking system. The hydraulic jacking system is linked with the cable control terminal to achieve precise control of the inclination angle. The form-finding process takes the radial cable design configuration (4) as the target configuration and forms it through multiple load superpositions and dynamic adjustments. The method is applied to the hoisting construction of large dome structures or containment structures in nuclear power engineering or large stadium projects.

2. The hoisting method for a permanent cable net support according to claim 1, characterized in that, The end of the radial steel beam (7) is hinged to the node plate on the ring truss (3) by means of a pin connection. This connection means that the radial steel beam (7) can achieve continuous change of the inclination angle under the drive of the hydraulic jacking system. During the process of applying loads multiple times, the rotation of the hinge support (2) can reduce the peak bending moment generated in the ring truss (3) due to the increase of tension in the radial cable design configuration (4) and radial cable construction configuration (5).

3. A hoisting system for implementing the method according to any one of claims 1 to 2, characterized in that, Includes the following modules: The ring cable monitoring system is used to monitor the elevation of the strut connection point and the distance to the radial cable in real time; The data analysis system is used to process monitoring data and generate control instructions. The pull-down cable control terminal is used to receive instructions and control the cable tension adjustment of the control cable (6); A hydraulic tilt adjustment system is used to control the tilt angle change of the radial steel beam (7); Intelligent hydraulic adjustment device is used to adjust the tension of the action cable.

4. The permanent cable net supported hoisting system according to claim 3, characterized in that, The ring cable monitoring system includes multiple monitoring prisms deployed at the strut connection points and a measuring robot located at the center of the area enclosed by the ring truss (3), used to achieve high-precision data acquisition from multiple angles; The cable control terminal and the hydraulic tilt adjustment system communicate and work together via an industrial bus to achieve synchronous and precise control of the cable force and the radial steel beam tilt angle. The intelligent hydraulic adjustment device includes a servo hydraulic cylinder, a high-precision tension sensor, and a closed-loop controller, and its cable force adjustment accuracy error is controlled within ±1%. The hoisting system also includes a remote monitoring platform, which is connected to the cable control terminal to display construction status, cable force, tilt angle and configuration deviation data in real time, and supports both automatic execution and manual intervention modes. The hoisting system is configured for hoisting large cable-supported grid structures in nuclear power projects or large venue projects where safety requirements are extremely high.

5. The permanent cable net supported hoisting system according to claim 3, characterized in that, The data analysis system integrates intelligent algorithm modules for precise control and forward-looking prediction throughout the construction process, including: The configuration recognition algorithm module is used for formula-based... ,in, and These are the design elevation and design distance, respectively. and The measured values ​​are used to calculate the deviation between the real-time configuration and the design configuration, providing a basis for adjustment of the control terminal. The structural deformation prediction module is used for formula-based prediction. ,in, To predict deformation variables, The deformation coefficient, For the first The next applied load, For the length of the corresponding cable segment, The elastic modulus of the cable, Given the cross-sectional area of ​​the cable, the deformation trend of the cable net during construction is predicted, and the deformation coefficient is used. The value is obtained by fitting historical construction data or finite element simulation, and its range is from 1.0 to 1.

5. It is used to correct the deviation between the theoretical model and the actual construction. The construction phase simulation module is used to simulate construction before construction begins, based on the following energy minimization principle: ,in, The total potential energy of the system is... It is a displacement function. For the first The displacement of each node is minimized. Construction simulation is conducted to determine the optimal construction path.

6. The permanent cable net supported hoisting system according to claim 5, characterized in that, The hoisting system is also equipped with multiple monitoring and compensation modules to adapt to complex environments and ensure construction safety, including: The cable fatigue monitoring submodule is used to evaluate the fatigue life of the cable based on Miner's linear cumulative damage theory, and its cumulative damage degree. The calculation is as follows: ,in, For the first The actual number of cycles under a given stress level. To determine the cumulative fatigue life damage of the cable under the corresponding stress level, the number of fatigue life cycles is calculated. Conduct an assessment; The temperature compensation module is used to compensate for cable length changes in real time based on ambient temperature variations. The compensation formula is as follows: ,in, The change in length caused by temperature. The initial cable length, The coefficient of linear expansion is 1 / 3. The current temperature. The cable length is compensated in real time for the reference temperature; The seismic response suppression module is used to monitor seismic motion signals during construction and adjust the hydraulic system response using the following transfer function: ,in, For system gain, For the damping ratio, For natural frequency, As a Laplace variable, this function filters out high-frequency vibration components to ensure construction stability; Acoustic emission monitoring devices are used to identify microscopic damage to cable nets or connectors during construction. The identification threshold is set according to the following signal-to-noise ratio formula: ,when An alarm is triggered when the value exceeds 20dB.

7. A permanent cable net supported hoisting system according to claim 6, characterized in that, The hoisting system is built upon a hardware and structural foundation and includes: The wireless synchronous control network uses a time-division multiple access protocol to coordinate the actions of multiple hydraulic regulating devices, and the time synchronization error is controlled within ±1ms. Multiple redundant control channels improve the overall system reliability. From the formula Calculate, where, and The reliability of the primary channel and the backup channel are respectively determined, and the system automatically switches to the backup channel when the primary channel fails. The hoisting system operates on a stable foundation provided by the main structure (1), and the ring truss (3) is installed on the main structure (1) by a plurality of hinge supports (2), and the hinge supports (2) are configured to allow the ring truss (3) to undergo small rotations within a preset range during construction to release internal forces. The ring truss (3) serves as the far-end anchorage and force transmission hub for all radial cables and radial steel beams (7); The measuring robot in the ring cable monitoring system is deployed at the center of the area enclosed by the ring truss (3), and a measuring coordinate system is established based on it.

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