Hoisting method and system for permanent cable net support

Abstract

The invention relates to the technical field of cable-supported grid structures, and discloses a permanent cable net support hoisting method which comprises the following steps: hoisting a cable net to an initial mounting configuration; applying a pull-down force to the cable net through at least one measure cable; the inclination angles of the radial steel beams relative to the horizontal plane are changed by multiple times, and loads are applied to the radial cables in the cable net by the heat by multiple times; after the load is applied each time, the cable force of the measure cable is dynamically adjusted, so that the configuration of the radial cable is matched with a preset supporting rod or flying column connecting point, and connection is completed; and after all the connecting points are connected, the measure cables are dismantled, and final shape finding of the radial cables is completed. The invention aims to provide a construction method for mounting an upper steel structure on a flexible cable net based on load superposition and a mode of dynamically adjusting a pull-down tool cable, and solves the problem that a plurality of support radial units complete shape finding under the control of a single pull-down tool cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable-supported grid structure, in particular to a hoisting method and system of permanent cable-supported grid structure. BACKGROUND

[0002] The spoke-type cable-supported grid structure system has been widely used in large-span space structures such as stadiums in recent years due to its good mechanical properties and architectural performance. The traditional construction method of this type of structure generally adopts the "steel first and cable later" process, that is, a full-support jig is first erected, the upper rigid grid structure is installed on it, and then the lower cable net is tensioned and lifted. Finally, the jig is removed to complete the structure system conversion. With the development of technology, the "cable first and steel later" innovative construction idea appears, that is, the permanent cable net is first tensioned and lifted as a temporary support platform, and then the upper steel structure is hoisted on it. Although this method reduces the dependence on the jig, in practical application, especially for complex radial cable systems with multiple support rods, how to accurately realize the synchronous form-finding and installation of multiple support points on the high-altitude flexible and variable cable net support is still lacking reliable and efficient control means.

[0003] At present, although the "cable first and steel later" construction of single support point has been practiced in some projects, the form-finding construction of multi-support radial cable net still has significant technical problems: first, the elevations and plane positions of multiple support rod connection points influence each other, and it is difficult to achieve coordinated and synchronous positioning using traditional manual or separate control adjustment methods, resulting in poor construction accuracy and low efficiency; second, in the dynamic hoisting process, the cable net shape changes constantly with the load, and there is a lack of real-time monitoring and feedback control mechanism, so there is a lot of uncertainty and safety risk in the installation process; third, in order to control multiple positions, multiple sets of temporary measure cables are often set, which leads to complex measures, high cost, and easy interference with on-site processes. Therefore, there is an urgent need for a construction method and corresponding control system that can realize intelligent, accurate and efficient form-finding of multi-support radial cable net. SUMMARY

[0004] The purpose of the present application is to provide a construction method for installing the upper steel structure on the flexible cable net based on load superposition and dynamic adjustment of the down-drawing tool cable, which solves the problem of form-finding of the multi-support radial unit under the control of a single down-drawing tool cable, and proposes a hoisting method and system of permanent cable-supported grid structure.

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

[0006] A hoisting method of permanent cable-supported grid structure, comprising the following steps:

[0007] S10, lifting the cable net to a preliminary installation position;

[0008] S20, applying a downward force to the cable net through at least one measure cable;

[0009] S30, changing the inclination of the radial steel beam relative to the horizontal plane in multiple times, thereby applying loads to the radial cables in the cable net in multiple times;

[0010] S40, after each load is applied, matching the configuration of the radial cable with the preset bracing rod or flying column connecting point by dynamically adjusting the cable force of the measure cable, and completing the connection;

[0011] S50, after the connection at all connecting points is completed, removing the measure cable, and completing the final configuration of the radial cable.

[0012] On the basis of the above technical solutions, the application can also be improved as follows.

[0013] Further, the step of changing the inclination of the radial steel beam in multiple times in S30 comprises: after the end of the radial steel beam is connected with the ring truss, applying loads to the radial cable in six times with inclinations of 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree and 0 degree in sequence;

[0014] The step of completing the connection after each load is applied comprises:

[0015] After the first load with an inclination of 5 degrees is applied, the measure cable is adjusted to complete the connection of the first bracing rod connecting point;

[0016] After the second load with an inclination of 4 degrees is applied, the measure cable is adjusted to complete the connection of the second bracing rod connecting point;

[0017] After the third load with an inclination of 3 degrees is applied, the measure cable is adjusted to complete the connection of the third bracing rod connecting point;

[0018] After the fourth load with an inclination of 2 degrees is applied, the measure cable is adjusted to complete the connection of the fourth bracing rod connecting point;

[0019] After the fifth load with an inclination of 1 degree is applied, the measure cable is adjusted to complete the connection of the fifth bracing rod connecting point;

[0020] After the sixth load with an inclination of 0 degree is applied, the measure cable is adjusted to complete the connection of the flying column connecting point. Further, the force value F of each load application i is calculated by the following formula:

[0021] F i = k·ΔL i ·cos(θ i )

[0022] wherein k is the stiffness coefficient of the cable, ΔL i is the length change of the cable at the i-th adjustment, and θ i is the inclination at the i-th load application.

[0023] In each step of load application, the elevation of the strut connecting point and the distance of the radial cable are monitored in real time by a ring cable monitoring system until the distance is zero, which is determined as the connection condition being met, the ring cable monitoring system includes a monitoring prism arranged at the strut connecting 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 end of the radial steel beam is hinged to the node plate on the ring truss through a pin shaft connection mode, which enables the radial steel beam to realize continuous change of the inclination angle under the driving of the hydraulic jacking system, and the rotation of the hinged support can reduce the bending moment peak value generated in the ring truss due to the increase of the tension of the radial cable design position and the radial cable construction position.

[0025] Furthermore, the measure cable is adjusted by an intelligent hydraulic adjusting device, which receives instructions from the data analysis system to dynamically adjust the cable force, and the inclination angle of the radial steel beam is adjusted by a hydraulic jacking system, which is linked with the down cable control terminal to realize accurate control of the inclination angle, and the shape finding process takes the radial cable design position as the target position and is formed by multiple load superposition and dynamic adjustment, the method is applied to the hoisting construction of large dome structures or containment structures in nuclear power engineering or large venue engineering.

[0026] A hoisting system supported by a permanent cable net, comprising the following modules:

[0027] A ring cable monitoring system for real-time monitoring of the elevation of the strut connecting point and the distance of the radial cable;

[0028] A data analysis system for processing monitoring data and generating adjustment instructions;

[0029] A down cable control terminal for receiving instructions and controlling the cable force adjustment of the measure cable;

[0030] A hydraulic inclination adjustment system for controlling the change of the inclination angle of the radial steel beam;

[0031] An intelligent hydraulic adjusting device for performing tension adjustment of the measure cable.

[0032] Furthermore, the ring cable monitoring system includes a plurality of monitoring prisms arranged at the strut connecting point and a measuring robot located at the center of the area surrounded by the ring truss, for realizing multi-angle high-precision data acquisition;

[0033] The down cable control terminal and the hydraulic inclination adjustment system communicate and link through an industrial bus to realize synchronous and accurate control of the cable force of the measure cable and the inclination angle of the radial steel beam;

[0034] The intelligent hydraulic adjusting device comprises a servo hydraulic cylinder, a high-precision tension sensor and a closed-loop controller, and the cable force adjusting precision error is controlled within ±1%;

[0035] The system further comprises a remote monitoring platform, which is in communication connection with the cable force control terminal, and is used for displaying the construction state, cable force, inclination angle and position deviation data in real time, and supporting automatic execution and manual intervention dual mode;

[0036] The system is configured to be suitable for hoisting operation of a large cable-supported grid structure with extremely high safety requirements in nuclear power engineering or large venue engineering.

[0037] Further, the data analysis system integrates intelligent algorithm modules for accurate control and forward-looking prediction of the whole construction process, including:

[0038] A position identification algorithm module is used for calculating the deviation between the real-time position and the design position based on the formula Wherein, H d and D d are the design elevation and the design distance, H m and D m are the measured values, the deviation between the real-time position and the design position is calculated, and the adjustment basis is provided for the control terminal;

[0039] A structure deformation prediction module is used for calculating the predicted deformation based on the formula Wherein, ΔS is the predicted deformation, α is the deformation coefficient, F i is the i-th applied load, L i 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 historical construction data or finite element simulation fitting, and the value range is 1.0 to 1.5, which is used to correct the deviation between the theoretical model and the actual construction;

[0040] A construction stage simulation module is used for construction simulation before construction by the following energy minimization principle: Wherein, U is the total potential energy of the system, u is the displacement function, u i is the displacement of the i-th node, and the optimal construction path is determined by minimizing U.

[0041] Further, the system is further configured with a multiple monitoring and compensation module for adapting to complex environment and ensuring construction safety, including:

[0042] A cable force fatigue monitoring sub-module is used for evaluating the fatigue life of the cable based on the Miner linear cumulative damage theory, and the cumulative damage degree D is calculated as follows: Wherein, n jN is the actual cycle number under the jth stress level j N is the fatigue life cycle number corresponding to the stress level, and the fatigue life cumulative damage degree D of the cable is evaluated;

[0043] A temperature compensation module is used to compensate the cable length in real time according to the change of the ambient temperature, and the compensation formula is: ΔL t = K0·β·(T-T0), wherein ΔL t is the length change amount caused by temperature, L0 is the initial cable length, β is the linear expansion coefficient, T is the current temperature, and T0 is the reference temperature, and the cable length is compensated in real time;

[0044] An earthquake response suppression module is used to monitor the seismic signal during construction and adjust the hydraulic system response through the following transfer function: wherein K is the system gain, ξ is the damping ratio, ω n is the natural frequency, and s is the Laplace variable, and high-frequency vibration components are filtered through the function to ensure construction stability;

[0045] An acoustic emission monitoring device is used to identify micro-damage of the cable net or the connecting piece during construction, and the identification threshold is set according to the following signal-to-noise ratio formula: When the SNR exceeds 20 dB, an alarm is triggered.

[0046] Furthermore, the system is built on a hardware and structural basis and includes:

[0047] A wireless synchronous control network adopts a time division multiple access protocol to coordinate the actions of multiple hydraulic adjusting devices, and the time synchronization error is controlled within ±1 ms;

[0048] Multiple redundant control channels, the overall system reliability R s is calculated by the formula R s = 1-(1-R1)(1-R2), wherein R1 and R2 are the reliabilities of the main channel and the standby channel respectively, and when the main channel fails, the system automatically switches to the standby channel;

[0049] The system operates on a stable basis provided by the main structure, the ring truss is installed on the main structure through multiple hinged supports, and the hinged supports are configured to allow the ring truss to rotate slightly within a preset range during construction to release internal forces;

[0050] The ring truss serves as the distal anchoring point and force transmission hub of all radial cables and radial steel beams;

[0051] The measurement robot in the ring cable monitoring system is arranged at the center of the area surrounded by the ring truss and establishes a measurement coordinate system with the ring truss as the reference.

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

[0053] The application cooperates with the dynamic adjustment of the cable force after each loading by changing the radial steel beam inclination angle in batches to apply the load in batches, and the closed-loop control logic of the hoisting system, the loop cable monitoring system, the data analysis system and the intelligent hydraulic adjusting device, breaks through the limitations of traditional manual or separate control adjustment, the real-time data acquisition of the loop cable monitoring system ensures the dynamic perception of the position relationship of the multiple support points, the data analysis system quickly generates a coordinated adjustment scheme based on the preset shape model, and the precise execution of the intelligent hydraulic adjusting device realizes the synchronous response of the multiple support points in the load application process in batches, effectively avoiding the problem of mutual interference of the connection point positions, greatly improving the positioning accuracy and construction efficiency.

[0054] In view of the problem that the cable net shape changes with the load in dynamic hoisting and lacks real-time monitoring and feedback control, a whole-process response mechanism of real-time monitoring-dynamic analysis-immediate adjustment is constructed: the loop cable monitoring system continuously captures the cable net shape change, the data analysis system compares the monitoring data with the preset shape in real time, generates an adjustment instruction as soon as a deviation is found, the dropper control terminal and the intelligent hydraulic adjusting device respond quickly, and the cable net shape is corrected in real time by adjusting the cable force of the temporary cable, so that the cable net always tends to the preset support rod or flying column connection point under the action of dynamic load, significantly reducing the uncertainty of the installation process and fundamentally reducing the safety risk.

[0055] For the problem that the temporary cable is complex, high in cost and easy to interfere with the process, at least one cable is used to control the cable net shape, which greatly simplifies the complexity of the temporary measures compared with the setting of the traditional multiple temporary cables; at the same time, the temporary cable only plays a temporary regulating role in the construction stage and is finally removed with the completion of the construction, avoiding interference with the permanent structure, cooperating with the precise control of the radial steel beam inclination angle by the hydraulic inclination adjusting system, applying the load in batches and order, reducing the dependence on the temporary cable, further reducing the measure cost and the cross interference of the site process, and realizing the simplicity and economy of the construction process. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 It is a schematic diagram of the cable net lifting state of the application;

[0057] Figure 2 It is a schematic diagram of the setting of the dropper tool system of the application;

[0058] Figure 3 It is a schematic diagram of the connection of the radial steel beam and the loop truss of the application;

[0059] Figure 4Schematic diagram for applying the second load to the present application;

[0060] Figure 5 Schematic diagram for applying the third load to the present application;

[0061] Figure 6 Schematic diagram for applying the fourth load to the present application;

[0062] Figure 7 Schematic diagram for applying the fifth load to the present application;

[0063] Figure 8 Schematic diagram for applying the sixth load to the present application;

[0064] Figure 9 Schematic diagram for completing the construction of the present application;

[0065] Figure 10 Block diagram of the control system of the present application;

[0066] Figure 11 Schematic diagram for controlling the down-drawing cable of the present application.

[0067] In the figure: 1, main structure; 2, hinged support; 3, ring truss; 4, designed configuration of radial cable; 5, construction configuration of radial cable; 6, measure 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, flying column connection point. DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0069] A hoisting method of a permanent cable net support, comprising the following steps:

[0070] S10, lifting the cable net to a preliminary installation configuration;

[0071] S20, applying a downward pulling force to the cable net through at least one measure cable 6;

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

[0073] S40, after each load application, matching the configuration of the radial cable with the preset strut or flying column connection point by dynamically adjusting the cable force of the measure cable 6, and completing the connection.

[0074] S50, after all the connection points are connected, the temporary cable 6 is removed, and the final shape of the radial cable is completed.

[0075] By applying load step by step and dynamically adjusting the cable force of the temporary cable, the upper structure is accurately installed on the flexible cable net, which includes five main steps: preliminary installation of the cable net, application of downward force by the temporary cable, changing the inclination of the radial steel beam in several steps to apply load, dynamically adjusting the cable force to match the connection point, and finally removing the temporary cable to complete the shape finding. This method solves the problem of synchronous shape finding of multi-support point cable net on high flexible support through step-by-step loading and real-time adjustment, and is especially suitable for the construction of large-scale domes or containment structures in nuclear power projects or large-scale venue projects.

[0076] The instantaneous spatial shape of the cable net after being lifted as a whole by the traction cable 7 before any external adjustment measures are applied. Due to factors such as the self-weight of the cable net, distribution deviation of traction force, and installation errors, the actual spatial coordinates of the cable net, including the elevation, plan position, and cable force value of the radial cable, systematically deviate from the design shape of the radial cable 4 determined by the structure design in advance. The specific manifestations are as follows:

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

[0078] Plan position deviation: the projection position of the cable net node in the horizontal direction deviates from the design shape, which needs to be gradually corrected through subsequent load application process;

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

[0080] This state is the initial condition of the construction process, and the deviation amount needs to be gradually eliminated through the coordinated operation of step-by-step load application and dynamic adjustment of the cable force of the temporary cable in the subsequent steps, and finally the cable net shape converges to the design target state.

[0081] The step of changing the inclination of the radial steel beam 7 in S30 includes: after connecting the end of the radial steel beam 7 with the ring truss 3, applying a total of six loads with inclination angles of 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree, and 0 degrees to the radial cable in sequence;

[0082] The step of completing the connection after each load application includes:

[0083] After the first load with a 5-degree inclination angle is applied, the temporary cable 6 completes the connection of the first bracing rod connection point 8;

[0084] After the second load with a 4-degree inclination angle is applied, the temporary cable 6 completes the connection of the second bracing rod connection point 9;

[0085] After the third load with a 3-degree inclination is applied, the adjustment cable 6 completes the connection of the third strut connection point 10;

[0086] After the fourth load with a 2-degree inclination is applied, the adjustment cable 6 completes the connection of the fourth strut connection point 11;

[0087] After the fifth load with a 1-degree inclination is applied, the adjustment cable 6 completes the connection of the fifth strut connection point 12;

[0088] After the sixth load with a 0-degree inclination is applied, the adjustment cable 6 completes the connection of the flying column connection point 13. It is specifically provided that the radial steel beams are sequentially loaded with inclinations of 5°, 4°, 3°, 2°, 1°, and 0° in six times, and the adjustment cable completes 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 the key to achieving precise shape finding.

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

[0090] Design basis for the inclination sequence:

[0091] This inclination gradient is 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 in the cable net under different inclinations are simulated. The analysis shows that using a step-by-step decreasing inclination sequence instead of an equal gradient or random sequence can make the load transfer from the ring truss 3 to the radial cable design configuration 4 and the radial cable construction configuration 5 smooth, avoiding local stress mutation, and controlling the maximum stress concentration factor to below 1.5.

[0092] Convergence efficiency of configuration: construction simulation shows that this sequence can make the cable net configuration converge to the design state in the least number of loading times, 6 times, and the configuration adjustment amount after each loading is within the controllable range of the hydraulic system.

[0093] Feasibility of equipment operation: the inclination gradient design takes into account the stroke accuracy and response speed of the hydraulic jacking system, ensuring a smooth and undisturbed inclination adjustment process.

[0094] Specific target of cable force adjustment:

[0095] The adjustment of the cable force of the adjustment cable 6 after each loading needs to control the deviation of the current connection point elevation from the design elevation within ±5 mm, and the relative elevation difference between adjacent strut connection points is not more than 3 mm. This target value is determined based on the following factors:

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

[0097] Monitoring system accuracy: the ranging accuracy of the measuring robot in the cable monitoring system is ±1mm, which can stably identify a 5mm level deviation;

[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 inclination sequence and deviation control target need to be calibrated before construction, for example, adjusting the inclination gradient or cable force threshold, to adapt to the cable net span, cable diameter and load differences in specific projects. The calibrated parameters should be input into the control terminal of the dropper cable, as the basis for the action of the intelligent hydraulic adjusting device.

[0099] Force value F of each load application i Calculated by the following formula:

[0100] F i = k·ΔL i ·cos(θ i )

[0101] Where k is the stiffness coefficient of the cable, ΔL i is the length change of the cable at the i-th adjustment, and θ i is the inclination angle when the i-th load is applied;

[0102] During each step of load application, the elevation of the strut connection point and the distance from the radial cable are monitored in real time by the cable monitoring system until the distance is zero, which is determined as meeting the connection condition. The cable monitoring system includes a monitoring prism arranged at the strut connection point and a measuring robot located in the central part of the venue, which collects elevation data in real time and transmits it to the data analysis system. The force calculation formula clearly shows that the force value of each load is proportional to the stiffness of the cable, the length change and the cosine of the inclination angle. At the same time, it also limits the composition and working principle of the cable monitoring system, that is, by monitoring the prism and the measuring robot to collect elevation data in real time, and determining that the connection condition is met when the elevation and the distance from the radial cable are zero, ensuring the accuracy and controllability of the construction process.

[0103] The value of the stiffness coefficient k needs to be determined through axial tensile testing of the cable material combined with design specifications, and the specific process is as follows:

[0104] Test determination:

[0105] Cut samples from the same batch of cable material, conduct axial tensile testing, record the load-displacement curve, and calculate the elastic modulus E and effective cross-sectional area A;

[0106] According to the actual length L of the cable segment, the formula The actual stiffness coefficient of the cable segment is calculated.

[0107] Specification verification:

[0108] According to the Technical Specification for Cable Structures JGJ257-2012, the test value is corrected, considering the stiffness reduction caused by cable twisting effect, anticorrosion coating, etc., and finally The reduction coefficient is based on engineering experience and specification recommendations. For super-long cables with a length >100m, the sag effect needs to be considered additionally, and the stiffness value is corrected using the Ernst formula.

[0109] Monitoring system data transmission and processing flow closed-loop control:

[0110] Data acquisition:

[0111] The measurement robot such as Leica TS60 collects the three-dimensional coordinates of the monitoring prism at a frequency of 1Hz, and calculates the support rod connection point elevation H m and the distance D from the radial cable m ;

[0112] The data is transmitted to the data analysis system through a wireless network bridge using the IEEE802.11ac protocol.

[0113] Data processing and deviation calculation:

[0114] After receiving the data, the data analysis system calls the shape identification algorithm module, and calculates the real-time shape deviation δ according to the formula ;

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

[0116] Instruction execution and feedback:

[0117] The adjustment instructions are issued to the down-drawing cable control terminal through industrial Ethernet;

[0118] The control terminal drives the intelligent hydraulic adjusting device including a servo hydraulic cylinder and a tension sensor to adjust the cable force, and 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, and if the error exceeds ±1%, it triggers secondary adjustment until the accuracy requirement is met.

[0120] This process forms a closed-loop control of "monitoring-analysis-adjustment-feedback", and each adjustment cycle does not exceed 10 seconds, ensuring that the cable net shape converges to the design state during construction. It is also necessary to say that the stiffness coefficient k needs to be calculated for different cable segments and entered into the system database for real-time call. An abnormal value filtering mechanism such as Kalman filter needs to be set in the closed-loop control to avoid misadjustment caused by instantaneous vibration or measurement noise.

[0121] The end of the radial steel beam 7 is hinged to the node plate on the ring truss 3 by a pin shaft connection, which enables the radial steel beam 7 to continuously change the inclination angle under the drive of the hydraulic jacking system. During the process of applying multiple loads, the rotation of the hinged support 2 can reduce the bending moment peak value in the ring truss 3 due to the increase of the radial cable design shape 4 and the radial cable construction shape 5. The connection mode of the radial steel beam and the ring truss is pin shaft hinge, which allows the radial steel beam to continuously change the inclination angle under the drive of the hydraulic jacking system. At the same time, it is pointed out that the rotation of the hinged support can reduce the bending moment peak value in the ring truss, which reflects the adaptability and optimization of the structure design to the construction process

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

[0123] The guy cable 6 is adjusted by an intelligent hydraulic adjusting device, which 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 the hydraulic jacking system, which is linked with the control terminal of the down cable to achieve accurate control of the inclination angle. The shape finding process takes the radial cable design shape 4 as the target shape and is formed by multiple load superposition and dynamic adjustment. This method is applied to the hoisting construction of large-scale dome structures or containment structures in nuclear power projects or large-scale venue projects. The control and execution mechanism of the system is summarized, including the adjustment of the guy cable by the intelligent hydraulic adjusting device, the adjustment of the inclination angle of the radial steel beam by the hydraulic jacking system, and the emphasis on the shape finding process taking the design shape as the target, which is achieved by multiple load superposition and dynamic adjustment. At the same time, it is pointed out that this method is suitable for the hoisting of large structures in nuclear power projects or large-scale venue projects.

[0124] Specific composition of intelligent hydraulic adjusting device

[0125] The intelligent hydraulic adjusting device is a mechatronic execution mechanism, which specifically includes the following core components:

[0126] Servo motor: high-precision AC servo motor with rated torque of 20 N·m and repeat positioning accuracy of ±0.01°, directly connected with hydraulic pump through shaft coupling, used for accurate control of hydraulic oil output flow;

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

[0128] PLC controller: using modular PLC with built-in PID control algorithm, receiving digital instructions from the data analysis system and outputting 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 a universal joint at the end of the piston rod connected to the cable;

[0130] Safety redundancy module: including mechanical overflow valve, emergency manual pump, and accumulator to ensure system safety in case of electrical control failure.

[0131] The system realizes full-automatic construction through the following three-level architecture:

[0132] Monitoring layer:

[0133] The cable monitoring system collects 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-in the intelligent hydraulic adjusting device provides real-time feedback of cable force value with a sampling frequency of 100Hz.

[0134] Analysis layer:

[0135] The data analysis system uses digital twin technology to compare real-time data with 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 hydraulic cylinder stroke. The system compares the target cable force with the actual cable force in real time and automatically triggers the correction cycle when the error exceeds ±1%. The remote monitoring platform displays real-time data curves and control status, supporting one-key switching between automatic and manual modes.

[0138] It is also worth mentioning that all hydraulic pipelines are arranged with stainless steel hard 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. The system automatically stores operation data to the cloud platform, supporting later construction big data analysis.

[0139] A hoisting system for permanent cable net support, including the following modules:

[0140] Cable monitoring system for real-time monitoring of strut connection point elevation and radial cable distance;

[0141] Data analysis system for processing monitoring data and generating adjustment instructions;

[0142] The lower pull cable control terminal is used to receive instructions and control the cable force adjustment of the measure cable 6.

[0143] The hydraulic inclination adjustment system is used to control the inclination change of the radial steel beam 7.

[0144] The intelligent hydraulic adjustment device is used to perform the tension adjustment of the measure cable.

[0145] The system realizes the intelligentization, precision and automation of the construction process through the cooperation of multiple modules. The real-time and reliability of data transmission between modules are ensured by using industrial Ethernet or wireless communication technology. The system is also provided with redundancy design and fault self-diagnosis function to improve the stability and safety of the system.

[0146] The ring cable monitoring system includes multiple monitoring prisms arranged at the support rod connection points and a measuring robot located at the center of the area surrounded by the ring truss 3, which is used to realize multi-angle high-precision data acquisition.

[0147] The lower pull cable control terminal and the hydraulic inclination adjustment system are communicated and linked through the industrial bus to realize the synchronous and accurate control of the measure cable force and the radial steel beam inclination.

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

[0149] The system also includes a remote monitoring platform which is in communication connection with the lower pull cable control terminal, used to display the construction state, cable force, inclination and shape deviation data in real time, and supports automatic execution and manual intervention dual mode.

[0150] The system is configured to be suitable for the hoisting operation of large cable-supported grid structure with very high safety requirements in nuclear power engineering or large venue engineering. It specifically describes the composition of the ring cable monitoring system, the monitoring prisms and the measuring robot, the communication mode, the composition of the intelligent hydraulic adjustment device and the function of the remote monitoring platform. These limitations enhance the specific implementability and operability of the system.

[0151] The measurement robot adopts Leica TS60 super high precision total station, and specific performance parameters are as follows: measurement accuracy: angle measurement accuracy: ±0.5'', distance measurement accuracy: ±0.6mm+1ppm, prism mode is adopted, point three-dimensional coordinate accuracy is ±1mm@100m, tracking mode is 10Hz continuous automatic tracking prism, high-speed scanning mode is 30Hz for intensive monitoring in key construction stages, effective recognition distance is 1000m, up to 16 prisms can be automatically tracked at the same time to cover all strut connecting points. Its working temperature is-20℃ to +50℃, the protection level is IP65 dustproof and waterproof, the built-in dual-axis compensator has a compensation range of ±6', which ensures the measurement stability in harsh construction environment, supports gigabit Ethernet, Wi-Fi6 and 5G module, and data transmission delay is less than 10ms

[0152] The platform realizes three-dimensional visualization and decision support in the following ways: based on BIM model, a digital twin of the cable net is constructed, and the data of the measurement robot is linked in real time; the model supports LOD3 level accuracy, including cable segments, nodes, struts and other detailed components; color gradient mapping technology is adopted: green: deviation ≤±3mm meets the requirements yellow: deviation ±3 to 5mm warning state red: deviation >±5mm needs immediate intervention Deviation data is overlaid on the surface of the three-dimensional model in the form of a cloud chart, supporting multi-angle section analysis, and real-time display of key parameters: cable force curve, inclination change trend, environmental temperature and humidity; the over-limit parameter automatically flashes and alarms, and is pushed to the mobile terminal APP / sms, and the operator can click any measure cable in the model to manually input the target cable force value, and the system automatically generates adjustment instructions; it also supports construction process backtracking, and can call historical model state at any time point for comparison and analysis.

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

[0154] The shape recognition algorithm module is used to calculate the deviation between the real-time shape and the design shape based on the formula wherein H d and D d are the design elevation and the design distance, H m and D m are the measured values, to provide adjustment basis for the control terminal;

[0155] The structure deformation prediction module is used to calculate the predicted deformation based on the formula wherein ΔS is the predicted deformation, α is the deformation coefficient, F i is the i-th applied load, and L iE is the elastic modulus of the cable, A is the cross-sectional area of the cable, the deformation trend of the cable net during construction is predicted, the deformation coefficient a is obtained by fitting historical construction data or finite element simulation, and the value range is 1.0 to 1.5, which is used to correct the deviation between the theoretical model and the actual construction;

[0156] The construction stage simulation module is used to simulate the construction before construction by the following energy minimization principle: Wherein, U is the total potential energy of the system, u is the displacement function, u i is the displacement of the i th node, E is the elastic modulus of the cable, A is the cross-sectional area of the cable, F i is the i th applied load, the optimal construction path is determined by minimizing U, the principle of construction simulation is used to determine the optimal construction path, which introduces intelligent algorithm module, including shape identification algorithm, structure deformation prediction algorithm and construction stage simulation algorithm. These algorithms realize the accurate control and forward prediction of the construction process through mathematical model and simulation technology, further improve the intelligent level of the system.

[0157] The intelligent algorithm module realizes the accurate control and forward prediction of the whole construction process through the following process:

[0158] Dynamic optimization process of deformation coefficient a:

[0159] Initial assignment: based on finite element simulation and material properties, the initial deformation coefficient a is 1.2;

[0160] Data acquisition: record the load value F i , cable length L i and actual deformation ΔS actual in real time during construction;

[0161] Machine learning optimization:

[0162] Gaussian process regression model is adopted, historical construction data load, cable length and environmental temperature are taken as input, and actual deformation is taken as output, deformation prediction model is trained; every time a construction stage is completed, new data is used to update the model, deformation coefficient a is fitted again to make it converge to a more accurate value, and the value range is reduced to 1.0 to 1.3; Feedback mechanism: the optimized a value is fed back to the structure deformation prediction module in real time, which is used for deformation calculation in subsequent construction stages.

[0163] Real-time correction of shape identification algorithm:

[0164] Kalman filtering algorithm is used to fuse multi-sensor data measurement robot coordinates and inclination sensor readings to eliminate measurement noise and instantaneous vibration interference; smooth shape deviation data is output once every 5 seconds to ensure that the control command is generated based on stable data.

[0165] Parallel computing acceleration techniques:

[0166] Distributed computing architecture: finite element model is split into multiple sub-domains such as cable net, strut, ring truss, deployed on high-performance computing cluster; parallel solver: PETSc parallel solver is used to realize parallel assembly and solution of stiffness matrix; computing efficiency: traditional simulation time of 72 hours is shortened to within 4 hours to support pre-construction multi-scheme comparison.

[0167] Precision control measures:

[0168] Adaptive mesh refinement: automatically refine the mesh near stress concentration areas such as strut connection points to ensure that the stress calculation error is less than 5%; energy error estimation: based on the formula to evaluate the simulation accuracy, if e>2%, then automatically trigger mesh redivision; measured data verification: compare the simulation results with the construction data of the previous test section to correct the constitutive model parameters.

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

[0170] During construction, real-time monitoring data such as cable force and temperature are input into the updated simulation model to dynamically predict the shape and internal force changes in the subsequent construction stage; 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] Cable force fatigue monitoring sub-module, used to evaluate the fatigue life of the measure cable based on the Miner linear cumulative damage theory, the cumulative damage degree D is calculated as follows: where, n j is the actual number of cycles under the jth stress level, N j is the number of fatigue life cycles corresponding to the stress level, the fatigue life cumulative damage degree D of the measure cable is evaluated;

[0173] Temperature compensation module, used to compensate the cable length in real time according to the change of environmental temperature, the compensation formula is: ΔL t =L0·β·(T-T0), where ΔL t is the length change caused by temperature, L0 is the initial cable length, β is the linear expansion coefficient, T is the current temperature, T0 is the reference temperature, the cable length is compensated in real time;

[0174] Seismic response suppression module, used to monitor the seismic signal during construction and adjust the hydraulic system response through the following transfer function: where K is the system gain, ξ is the damping ratio, ω nThe natural frequency is s, the Laplace variable is s, the system transfer function is H(s), high-frequency vibration components are filtered out through the function, and the construction stability is ensured.

[0175] The acoustic emission monitoring device is used to identify micro-damage of the cable net or the connecting member during the construction process, and the identification threshold is set according to the following signal-to-noise ratio formula: When the SNR exceeds 20 dB, an alarm is triggered, the SNR is the signal-to-noise ratio, and the unit is decibel dB, P signal is the signal power, P noise is the noise power, and a multiple monitoring and compensation module is added, including cable force fatigue monitoring, temperature compensation, seismic response suppression and acoustic emission monitoring, which ensures the safety and stability of the construction process by monitoring and compensating external environmental changes and internal structural states in real time.

[0176] Specific implementation details of the temperature compensation module

[0177] Sensor arrangement scheme:

[0178] Temperature measurement point layout: one digital temperature sensor DS18B20 is arranged every 30 meters along the circumference of the cable net, with an accuracy of ±0.5℃, and redundant measurement points are added at the anchoring points of the ring truss 3 and the radial cable 4, and the tensioning end of the measure cable 6, with a total of not less than 50 temperature measurement points; Installation method: the sensor uses a stainless steel armored shell, which is tightly attached to the surface of the cable body through a heat-conducting silicone gasket, and is covered with a reflective heat insulation layer of aluminum foil composite film to avoid interference from solar radiation; Data acquisition: temperature data is collected to the gateway every 10 seconds through ZigBee wireless sensor network transmission, and then uploaded to the data analysis system through 5GCPE.

[0179] Data processing algorithm:

[0180] Real-time compensation calculation:

[0181] The compensation amount calculation is performed every 5 minutes:

[0182]

[0183] where w i is the weight coefficient, which is inversely proportional to the distance between the measurement point and the current adjustment cable segment, T 0,i is the reference temperature, which is the initial environmental temperature of the construction, 20℃;

[0184] Abnormal value processing:

[0185] A sliding window filter window width of 10 minutes is used to eliminate instantaneous abnormal temperature values, and if the data of three consecutive periods is out of tolerance, a sensor fault alarm is triggered.

[0186] Hysteresis compensation:

[0187] A first-order lag model L is introduced to consider the thermal inertia of the cable t,actual = ΔL t · (1 - e -t / τ ) with a time constant τ of 8 minutes determined by experiments.

[0188] Control strategy of the seismic response suppression module

[0189] Adaptive control architecture:

[0190] A model reference adaptive system (MRACS) is adopted to adjust the parameters of the hydraulic system transfer function H(s) in real time, with a second-order mass-damper-spring system as the reference model.

[0191] Reference model transfer function:

[0192]

[0193] where ω n and ξ are dynamically set according to the structural fundamental frequency determined by FFT analysis.

[0194] Parameter dynamic adjustment strategy:

[0195] Frequency tracking:

[0196] The vibration signals are collected in real time by a three-axis acceleration sensor installed on the ring truss, and FFT analysis is performed every 0.1 seconds to extract the dominant frequency f d

[0197] Parameter mapping:

[0198] A query table is established to associate f d with the optimal control parameters:

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

[0200] 2Hz ≤ f d ≤ 5Hz resonance risk zone: set ξ = 0.5, K = 1.0, and the 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] Based on Lyapunov stability theory, an adaptive law is designed to continuously adjust K, ξ, ω n so that the actual response converges to the reference model.

[0203] The control parameters are sent to the servo hydraulic system through the PLC to adjust the flow and pressure output of the hydraulic cylinder.

[0204] If the safety threshold is exceeded for more than 5 seconds, the system automatically triggers emergency protection, i.e. hydraulic locking + temporary tensioning of the stay cable.

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

[0206] The system is built on the basis of hardware and structure, and includes:

[0207] A wireless synchronous control network uses the time division multiple access (TDMA) protocol to coordinate the actions of multiple hydraulic adjusting devices, with a time synchronization error controlled within ±1ms;

[0208] Multiple redundant control channels, with the overall system reliability R s calculated by the formula R s = 1-(1-R1)(1-R2), where R1 and R2 are the reliabilities of the main channel and the backup channel respectively, and the system automatically switches to the backup channel when the main channel fails;

[0209] The system operates on a stable basis provided by the main structure 1, and the ring truss 3 is installed on the main structure 1 through multiple hinged supports 2, which are configured to allow the ring truss 3 to rotate slightly within a predetermined range during construction to release internal forces;

[0210] The ring truss 3 serves as the distal anchoring point and force transmission hub for all radial cables and radial steel beams 7;

[0211] The measurement robot in the ring cable monitoring system is placed at the center of the area surrounded by the ring truss 3 and establishes a measurement coordinate system based on it, which defines the hardware and structural basis of the system, including the wireless synchronous control network, multiple redundant control channels, and the specific structure of the main structure, ring truss, and hinged support. These definitions ensure the reliability and stability of the system in complex environments.

[0212] The wireless synchronous control network uses a time-triggered protocol as the core communication protocol to ensure the determinism of data transmission through the following mechanisms:

[0213] Communication scheduling table design:

[0214] The communication period is divided into fixed time window cycles with a period length of 10ms, and each hydraulic adjusting device is allocated a dedicated time slot such as 0.5ms / node; Time slot allocation is based on a topology optimization algorithm to ensure that critical nodes such as the main control PLC and hydraulic execution unit have priority in low-latency windows;

[0215] Clock synchronization mechanism:

[0216] Adopt IEEE1588 Precision Time Protocol (PTP), master clock node integrated in the dropper control terminal sends synchronization message every 1 second, slave node hydraulic regulator controller corrects local clock, synchronization accuracy reaches ±1 μs; Redundant clock source: equipped with GPS module and rubidium atomic clock dual backup to prevent master clock failure;

[0217] Deterministic transmission guarantee:

[0218] Data frame adds timestamp and sequence number, receiver parses instructions according to strict timing, discards frames with timeout > 2ms or out of order; Key instructions such as emergency stop signal use dual-band redundant transmission 2.4GHz + 5.8GHz to avoid single-band interference;

[0219] Network fault tolerance design:

[0220] Periodically perform channel quality detection RSSI and bit error rate, if the indicators of 3 consecutive periods are out of limits, automatically switch to the standby channel preconfigured frequency hopping sequence.

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

[0222] Channel monitoring mechanism: master and standby channels exchange heartbeat messages containing CRC check every 50ms, if the standby channel does not receive the master channel heartbeat for 5 consecutive times, it is determined that the master channel is faulty; Each channel controller monitors its own hardware state CPU load, memory usage, power voltage in real time, and actively sends fault code to the arbitration module when abnormal;

[0223] Switching logic:

[0224] Adopt priority-based arbitration strategy: default master channel priority 1 control output, standby channel priority 2 real-time synchronization master channel state; The arbitration module is implemented by independent FPGA, which completes the transfer of control right within 10ms after detecting the master channel failure, and locks the master channel output;

[0225] Non-disturbance switching guarantee:

[0226] Preload the latest control parameters such as PID output value and cable force target value before switching the standby channel to avoid instruction jump;

[0227] Fault handling process: primary fault instantaneous communication interruption: enable instruction cache pool depth 50, continue execution according to the last valid instruction, and try to rebuild the connection; secondary fault hardware failure: switch to the standby channel, and trigger the alarm signal sound and light + mobile terminal push, and the maintenance personnel need to confirm on site within 15 minutes; tertiary fault double channel failure: start the safety mode: all hydraulic adjusting devices lock the current position, the measure cable 6 is maintained by the mechanical overflow valve The current cable force, the system is on standby until manual intervention.

[0228] Reliability quantification verification:

[0229] System overall reliability R s FMEA failure mode and effect analysis verification: single channel MTBF average failure-free time ≥100,000 hours; under double redundancy architecture R s =1-(1-R1)(1-R2)≥0.999999 Meet the safety level requirements.

[0230] Hydraulic action synchronization error is reduced from ±5ms to ±0.5ms, avoiding the shape distortion caused by the asynchronous adjustment of multiple cable forces, the time from fault detection to complete switching is <15ms, which is far more than the manual response limit >200ms, and the double redundancy design shortens the annual unexpected downtime to <5 minutes.

[0231] It should be noted that the TTP protocol stack is solidified in the FPGA chip, avoiding communication interruption caused by software system crash, the heartbeat message carries an encrypted signature AES-128, preventing malicious nodes from injecting false fault signals, and all switching events are recorded in the black box nonvolatile memory, supporting post-fault tracing.

[0232] The present application firstly lifts the cable net as a whole to the preliminary installation position through the traction cable, at this time, the actual shape of the cable net deviates from the design shape; then the measure cable is arranged at the end of the radial cable and a downward pulling force is applied, so that the cable net is displaced downward; then the radial steel beam is hinged with the ring truss, and the radial cable is loaded by the hydraulic jacking system in 5°, 4°, 3°, 2°, 1°, 0° inclination sequence in six times, after each loading, the intelligent hydraulic adjusting device is dynamically adjusted to control the deviation of the support rod connecting point elevation and the design elevation within ±5mm, and the fixation of the six connecting points is completed in turn; the shape data is collected by the ring cable monitoring system in real time, the deviation is calculated by the data analysis system through intelligent algorithm, and the control instruction is generated, realizing the closed-loop control of "monitoring-analysis-adjustment"; finally, the measure cable is removed after all the connecting points are fixed, and the precise shape finding of the cable net is completed, the system realizes the high-precision and full-automatic construction of large structures by integrating wireless synchronous control, multiple redundant channels and temperature / earthquake compensation modules.

[0233] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it should be taken in a descriptive sense and not a limiting sense.

[0234] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, substitutions, and alterations can be made to the embodiments of the application without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A method for lifting a permanent cable net support, characterized in that: The following steps are involved: S10, lifting the cable net to a preliminary installation position; S20, applying a downward pulling force to the cable net through at least one measure cable (6); S30, changing the inclination angle of the radial steel beam (7) relative to the horizontal plane multiple times, thereby applying loads to the radial cables in the cable net in stages; S40, after each load application, dynamically adjusting the cable force of the measure cable (6) so that the configuration of the radial cable matches the preset strut or fly column connection point and the connection is completed; S50, after all connection points are connected, the measure cable (6) is removed to complete the final shape-finding of the radial cable.

2. A method for rigging a permanent cable net support according to claim 1, characterized in that: The step of changing the inclination angle of the radial steel beam (7) in multiple times in S30 comprises: 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 at inclination angles of 5 degrees, 4 degrees, 3 degrees, 2 degrees, 1 degree and 0 degrees in sequence; The steps of completing the connection after each load application include: After applying the first load with a 5-degree inclination angle, adjust the measure rope (6) to complete the connection of the first support rod connection point (8); After applying the second load with a 4-degree inclination angle, adjust the measure rope (6) to complete the connection of the second support rod connection point (9); After applying the third load with a 3-degree inclination angle, the measure rope (6) is adjusted to complete the connection of the third support rod connection point (10); After applying the fourth load with a 2-degree inclination angle, the measure rope (6) is adjusted to complete the connection of the fourth support rod connection point (11); After applying the fifth load with an inclination angle of 1 degree, the measure rope (6) is adjusted to complete the connection of the fifth support rod connection point (12); After the sixth load with an inclination angle of 0 degrees is applied, the measure cable (6) is adjusted to complete the connection of the fly column connection point (13).

3. A method for rigging a permanent cable net support according to claim 2, characterized in that: The force F applied each time i Calculated by the following formula: F i =k·ΔL i ·cos(θ i ) Where k is the stiffness coefficient of the cable, ΔL i is the length change of the cable during the i-th adjustment, θ i is the inclination angle when the load is applied for the i-th time; During each load application step, the elevation of the strut connection point and the distance from the radial cable are monitored in real time by the shackle monitoring system until the distance reaches zero, at which point the connection condition is determined to be met. The shackle monitoring system includes a monitoring prism arranged 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.

4. A method for rigging a permanent cable net support according to claim 2, characterized in that: The ends of the radial steel beams (7) are hinged to the node plates on the ring trusses (3) by means of pin connections. This connection enables the radial steel beams (7) to achieve continuous changes in the inclination angle under the drive of a hydraulic jacking system. During multiple load applications, the rotation of the hinged support (2) can reduce the peak bending moment generated in the ring trusses (3) due to the increase in tension caused by the radial cable design position (4) and the radial cable construction position (5).

5. The method for suspending a permanent cable net support according to claim 2, characterized in that: The measure cable (6) is adjusted by an intelligent hydraulic adjustment device, and the intelligent hydraulic adjustment device receives instructions from a 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, and the hydraulic jacking system is linked with a pull-down cable control terminal to achieve precise control of the inclination angle. The shape-finding process uses the radial cable design shape (4) as the target shape, and is formed 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 projects or large venue projects.

6. A hoisting system for implementing the method according to any one of claims 1 to 5, characterized in that: Includes the following modules: The ring cable monitoring system is used to monitor the elevation of the support pole connection point and the distance between the radial cables in real time; Data analysis system, used to process monitoring data and generate adjustment instructions; A pull-down cable control terminal is used to receive instructions and control the cable force adjustment of the action cable (6); A hydraulic tilt adjustment system for controlling the tilt change of the radial steel beam (7); Intelligent hydraulic adjustment device for adjusting the tension of the measure rope.

7. A permanent cable net supported hoisting system according to claim 6, characterized in that: The ring rope monitoring system comprises a plurality of monitoring prisms arranged at the connection points of the struts and a measuring robot located at the center of the area surrounded by the ring truss (3), and is used to realize multi-angle high-precision data collection; The pull-down cable control terminal communicates with the hydraulic inclination adjustment system via an industrial bus to achieve synchronous and precise control of the pull-down cable force and the radial steel beam inclination; The intelligent hydraulic adjustment device includes a servo hydraulic cylinder, a high-precision tension sensor and a closed-loop controller, and the cable force adjustment accuracy error is controlled within ±1%; The system also includes a remote monitoring platform, which is in communication with the cable control terminal and is used to display the construction status, cable force, inclination and configuration deviation data in real time, and supports both automatic execution and manual intervention modes; The system is configured to be suitable for large cable-supported grid structure hoisting operations in nuclear power projects or large venue projects that have extremely high safety requirements.

8. A permanent cable net supported hoisting system according to claim 6, characterized in that: The data analysis system integrates intelligent algorithm modules for precise control and forward-looking prediction of the entire construction process, including: Configuration recognition algorithm module for formula-based Among them, H d and D d are the design elevation and design distance respectively, H m and D m Calculate the deviation between the real-time configuration and the designed configuration based on the measured value, and provide the basis for adjustment for the control terminal; Structural deformation prediction module, used for Among them, ΔS is the predicted deformation variable, α is the deformation coefficient, and F i is the load applied for the i-th time, L i 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 through historical construction data or finite element simulation fitting. Its value range is 1.0 to 1.5 and is used to correct the deviation between the theoretical model and actual construction. The construction phase simulation module is used to simulate construction before construction using the following energy minimization principles: Among them, U is the total potential energy of the system, u is the displacement function, and u i is the displacement of the i-th node, and the optimal construction path is determined by minimizing U. The construction simulation is carried out according to the principle to determine the optimal construction path.

9. A permanent cable net supported hoisting system according to claim 8, characterized in that: The 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. The cumulative damage degree D is calculated as follows: Among them, n j is the actual number of cycles under the jth stress level, N j To evaluate the fatigue life cumulative damage D of the measured cable in terms of the number of fatigue life cycles under the corresponding stress level; The temperature compensation module is used to compensate the cable length in real time according to the ambient temperature change. The compensation formula is: ΔL t =L0·β·(T-T0), where ΔL t is the length change caused by temperature, L0 is the initial cable length, β is the linear expansion coefficient, T is the current temperature, T0 is the reference temperature, and the cable length is compensated in real time; The seismic response suppression module is used to monitor seismic signals during construction and adjust the hydraulic system response through the following transfer function: Where K is the system gain, ξ is the damping ratio, ω n is the natural frequency, s is the Laplace variable, and this function is used to filter out high-frequency vibration components to ensure construction stability; The acoustic emission monitoring device is 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 the SNR exceeds 20dB, an alarm is triggered.

10. A permanent cable net supported hoisting system according to claim 9, characterized in that: The system is built on a hardware and structural foundation and includes: The wireless synchronous control network uses the time division multiple access protocol to coordinate the actions of multiple hydraulic adjustment devices, and the time synchronization error is controlled within ±1ms; Multiple redundant control channels, the overall system reliability R s According to the formula R s =1-(1-R1)(1-R2), where R1 and R2 are the reliability of the primary channel and the backup channel, respectively. When the primary channel fails, it automatically switches to the backup channel. The system operates on a stable foundation provided by a main structure (1), the ring truss (3) is mounted on the main structure (1) via a plurality of hinge supports (2), and the hinge supports (2) are configured to allow the ring truss (3) to rotate slightly within a preset range during construction to release internal forces; The ring truss (3) serves as the distal anchorage point and force transmission hub for all radial cables and radial steel beams (7); The measuring robot in the ring rope monitoring system is arranged at the center of the area surrounded by the ring truss (3), and a measuring coordinate system is established with the ring truss (3) as a reference.

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