Construction method and system of three-layer inclined quadrangular pyramid grid structure

Abstract

The invention discloses a construction method and system of a three-layer inclined quadrangular pyramid grid structure, and relates to the technical field of building steel structure construction. The method comprises the steps of building an intelligent monitoring control system, carrying out BIM collaborative assembly and calibration, carrying out multi-dimensional graded lifting, carrying out adaptive attitude correction, carrying out BIM collaborative in-place recording and the like. The corresponding system comprises an intelligent monitoring control module, a BIM collaborative management module, a hydraulic synchronous lifting execution module, a posture correction module and an unloading in-place module. Through deep integration of a distributed control network and a BIM technology, dynamic monitoring, self-adaptive adjustment and visual management of the construction process can be realized, the accuracy, safety and efficiency of construction of the three-layer inclined quadrangular pyramid grid structure are improved, and the method is suitable for large-span steel structure grid installation engineering.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and more specifically to a construction method and system for a three-layer inclined quadrangular pyramidal space frame structure. Background Technology

[0002] The three-layer inclined quadrangular pyramid space frame structure, with its superior spatial mechanical properties, has become a core structural form in the field of modern large-span architecture. This structure relies on a unique three-dimensional grid layout, forming a stable spatial system through mutual support between members, exhibiting strong spatial stiffness and effectively resisting complex loads. The symmetrical distribution of the inclined quadrangular pyramid units creates multiple load transfer paths, effectively ensuring the uniformity of structural stress. In practical engineering applications, this structure demonstrates an astonishing span coverage capacity, highlighting the unique advantages of the three-layer inclined quadrangular pyramid space frame structure in landmark projects.

[0003] Traditional construction methods for space frame structures mainly include high-altitude assembly, segmented hoisting, and overall lifting, but these methods generally have the following problems: (1) Lack of adaptive adjustment capability: Traditional construction methods mostly use manual control or simple synchronous control, which cannot dynamically adjust construction parameters according to load changes, posture deviations, etc. during the construction process. The synchronization is poor and it is easy to cause the posture of the grid structure to deviate. (2) Incomplete control of construction status: The monitoring dimensions are singular, focusing only on displacement synchronization and ignoring the impact of load distribution, environmental factors and other factors on construction quality, making it difficult to fully grasp the real-time status of the space frame structure; (3) Construction efficiency and quality control are difficult: the assembly process relies on manual verification, the posture adjustment is delayed during the lifting process, and the force distribution is uneven during the unloading process, which can easily lead to structural deformation, node damage and other problems. Moreover, the traceability of construction data is difficult and the quality control efficiency is low.

[0004] Therefore, how to achieve dynamic monitoring, adaptive adjustment and visual management of the construction process, and improve the accuracy, safety and efficiency of construction, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a construction method and system for a three-layer inclined quadrangular pyramidal space frame structure, which solves the problems existing in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A construction method for a three-layer inclined quadrangular pyramidal space frame structure includes the following steps: S1. Configure a computer synchronous control system with adaptive algorithm, integrate multiple types of monitoring components, build a distributed control network, import grid parameters to generate dynamic control program, and preset synchronous displacement threshold, load safety threshold and environmental adaptation threshold. S2. Construct a 3D model of the space frame structure based on BIM technology, divide it into modular assembly units and label key information; assemble the space frame on the ground in order from the center to the periphery, and install temporary lifting tools and lower lifting point structures; verify and monitor components, hydraulic lifters and dynamic control programs by linking the 3D model of the space frame structure with the electrical control system. S3. Start the electrical control system and load the load in stages according to the preset load gradient. The monitoring components collect the load, displacement, levelness of the space frame and environmental parameters of the lifting points in real time. After the space frame is off the ground, pause and compare the monitoring results with the simulation data of the three-dimensional model of the space frame structure. After standing still without any abnormalities, the lifting will be carried out. S4. During the lifting process, the computer synchronous control system analyzes the displacement difference and load distribution of the lifting points through an adaptive algorithm. When the threshold is exceeded, the speed of the hydraulic lifter is automatically adjusted, prioritizing the adjustment of the speed of the high-load lifting points. The attitude and correction process of the space frame are visualized through a three-dimensional model of the space frame structure. S5. When the space frame is lifted to the preset distance from the design elevation, the support coordinate data of the three-dimensional model of the space frame structure are called to fine-tune the elevation of the lifting point; after docking, the unloading is carried out in stages according to the principle of "from the middle to the four sides + symmetry", and the stress on the support and the deflection of the space frame are monitored; after unloading is completed, a construction report is generated using the three-dimensional model of the space frame structure, and the hydraulic lifting device and temporary lifting tools are removed.

[0007] Optionally, the specific steps of S1 are as follows: A computer synchronous control host with built-in adaptive algorithm is selected, and multiple types of monitoring components are deployed according to the distribution of the grid suspension points and the location of key stress nodes to form a distributed control network consisting of monitoring components, edge computing nodes, computer synchronous control system and hydraulic actuators; The space frame parameters, including the space frame structure dimensions, node bearing capacity parameters, calculated lifting reaction force values, design elevation coordinates, and support constraint conditions, are imported into the computer synchronous control system. Based on the adaptive algorithm, a dynamic control program is automatically generated, consisting of lifting point coordinated action logic, data acquisition frequency control logic, and abnormal response triggering logic. Based on the mechanical properties of the space frame structure, construction safety standards, and environmental adaptation requirements, preset synchronous displacement thresholds, load safety thresholds, and environmental adaptation thresholds are established and verified through simulated construction conditions.

[0008] Optionally, in S1, the adaptive algorithm is an algorithm that achieves dynamic closed-loop regulation based on real-time monitoring data, including one or more of the following: adaptive PID algorithm, model predictive control algorithm, fuzzy adaptive algorithm, and distributed collaborative regulation algorithm.

[0009] Optionally, in S1, the multi-type monitoring components include at least one of the following: load monitoring component, displacement monitoring component, attitude monitoring component, environmental monitoring component, and stress-strain monitoring component.

[0010] Optionally, the specific steps of S2 are as follows: Based on the space frame structure design drawings, member node parameters and construction technical requirements, a fully parametric three-dimensional model of the space frame structure is constructed using BIM technology. Based on the stress characteristics of the space frame structure, transportation and hoisting capacity and on-site construction space conditions, modular assembly units are divided according to the principles of stress balance and size matching. The specifications of the members, node numbers, hoisting point coordinates, monitoring component installation positions and temporary hoisting tool connection node information of each unit are marked in the three-dimensional model of the space frame structure. Using the center node of the three-dimensional model of the space frame structure as a reference, an assembly platform is erected and leveled on the ground. Modular assembly units are then assembled sequentially from the center outwards. At the same time, temporary lifting devices and lower lifting point structures are installed according to the marked lifting point coordinates. Establish a data mapping relationship between the three-dimensional model of the space frame structure and the electrical control system, and import the installation parameters in the three-dimensional model of the space frame structure into the electrical control system; The monitoring components are activated to collect data and compare it with the preset parameters of the three-dimensional model of the space frame structure to confirm that the monitoring range, signal transmission stability and data accuracy meet the requirements; action commands are issued through the electrical control system to verify the start and stop response of the hydraulic lifter, the stroke adjustment accuracy and the alignment accuracy of the model lifting points; the initial lifting conditions are simulated to verify the accuracy of the dynamic control program in terms of the frequency of monitoring data collection, threshold judgment logic and command output.

[0011] Optionally, the specific steps of S3 are as follows: Confirm that the electrical control system, hydraulic lifter, monitoring components and distributed control network are in normal working condition, import the preset load gradient parameters and safety judgment criteria from the three-dimensional model of the grid structure into the electrical control system, and complete the parameter initialization; The electrical control system outputs control commands step by step according to the preset load gradient, driving the hydraulic lifter to perform graded loading. After each loading is completed, the system stays for a preset time to make the stress on the grid structure tend to stabilize. Throughout the graded loading process, load data, displacement data, grid levelness data, and construction site environmental parameters of each lifting point are continuously collected through multiple types of monitoring components. After preliminary processing by edge computing nodes, the data are transmitted in real time to the computer synchronous control system. The computer synchronous control system determines whether the space frame has left the ground based on the data fed back by the displacement monitoring component. Once it is confirmed that the space frame has completely left the ground, it automatically controls the hydraulic lifter to stop loading. After the pause, the computer synchronous control system calls the load-displacement simulation data and levelness benchmark data in the three-dimensional model of the space frame structure and compares them with the collected actual data in multiple dimensions to verify whether the consistency of load distribution at each lifting point, displacement synchronization, and deviation of the space frame levelness meet the preset requirements. If the data comparison shows no abnormalities, the static setting program is initiated. During the static setting period, various parameters are continuously collected and monitored. When the static setting is completed and all parameters are still within the safe threshold range, the computer synchronous control system issues a formal lifting command, driving the hydraulic lifter to carry out a smooth lifting operation at a preset rate.

[0012] Optionally, the specific steps of S4 are as follows: During the formal lifting of the space frame, multiple types of monitoring components collect displacement data, load data, and overall levelness data of each lifting point at preset high frequencies. After real-time preprocessing by edge computing nodes, the data is continuously transmitted to the computer synchronous control system. The computer synchronous control system continuously calculates the received dynamic data through an adaptive algorithm, obtains the vertical displacement difference, horizontal displacement difference, and load distribution uniformity between each lifting point, and compares them in real time with the synchronous displacement threshold and load safety threshold preset by S1 to dynamically determine whether there is a deviation exceeding the threshold. When an over-threshold deviation is detected, the adaptive algorithm generates a targeted adjustment command and sends it to the hydraulic lifter according to the logic of first balancing the load and then correcting the displacement synchronization, so that it can adjust the running speed in real time. The closed-loop feedback adjustment is used until the deviation returns to the threshold range. By linking the 3D model of the space frame structure with the real-time data of the computer synchronous control system, the dynamic attitude of the space frame, the position of the deviation exceeding the threshold, the adjustment command parameters and the correction effect are displayed synchronously in the 3D model in the form of dynamic annotations, intuitively presenting the whole process of attitude change.

[0013] Optionally, the specific steps for S5 are as follows: The computer synchronous control system continuously compares the current elevation of the space frame with the design elevation. When it is determined that the space frame has been raised to a preset distance from the design elevation, the lifting speed is automatically reduced, and the support coordinate data and node docking parameters in the three-dimensional model of the space frame structure are used as fine-tuning benchmarks. The computer synchronous control system issues elevation fine-tuning commands to each hydraulic lifter according to the logic of point-by-point calibration and group coordination. Based on the support coordinate data, it corrects the vertical height deviation of each lifting point to ensure that the alignment accuracy of the grid node and the support meets the design requirements. During the docking process, the attitude monitoring component verifies the grid level and node fit in real time until all docking is completed and the node connection is confirmed to be stable. After docking is completed, the computer synchronous control system starts the unloading program, dividing the unloading gradient according to the principle of "from the middle to the four sides + symmetry", and gradually reducing the output force of the hydraulic lifter from the initial load; after each unloading is completed, a preset time is allowed to allow the redistribution of internal forces in the grid structure to tend to stabilize. During the unloading process, the load monitoring component and stress-strain monitoring component collect support force data and space frame deflection data in real time and compare them with the design force value and allowable deflection value in the three-dimensional model of the space frame structure. If any data abnormality occurs, the unloading is immediately paused and the cause is investigated. The process continues after the data returns to normal. After unloading is completed and the stability of the space frame structure is confirmed, the system automatically summarizes the assembly parameters, lifting process data, attitude correction records, unloading data, and key indicators collected by the monitoring components to generate a standardized construction process record report. After the construction report is generated, the demolition work is carried out in the order of first using the hydraulic lifting device and then the temporary lifting equipment.

[0014] A construction system for a three-story inclined quadrangular pyramidal space frame structure implementing the method of any one of claims 1-8, comprising: The intelligent monitoring and control module is equipped with a computer synchronous control system with adaptive algorithms. It integrates multiple types of monitoring components, builds a distributed control network, imports grid parameters to generate dynamic control programs, presets synchronous displacement thresholds, load safety thresholds and environmental adaptation thresholds, and receives monitoring data and outputs control commands in real time. The BIM collaborative management module is used to build a 3D model of the space frame structure based on BIM technology, divide it into modular assembly units and mark key information; establish a data mapping relationship with the electrical control system to realize the linkage verification of monitoring components, hydraulic lifters and dynamic control programs; provide functions for simulation data comparison, support coordinate calling and construction process data summary and report generation, and simultaneously support the visualization of space frame posture and correction process. The hydraulic synchronous execution module is electrically connected to the intelligent monitoring and control module. It is used to receive control commands and execute graded loading, fine adjustment of lifting point elevation, and graded unloading actions based on the principle of "from the middle to the four sides + symmetry". The attitude adaptive correction module, in conjunction with the intelligent monitoring and control module and the BIM collaborative management module, is used to analyze the displacement difference of the lifting points and the load distribution in real time through adaptive algorithms. When the threshold is exceeded, a hydraulic lifter speed adjustment command is generated, prioritizing the adjustment of the speed of the high-load lifting points. The correction process is simultaneously fed back to the BIM collaborative management module for visualization.

[0015] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a construction method and system for a three-layer inclined quadrangular pyramidal space frame structure. It deeply integrates adaptive algorithms and BIM technology into the entire construction process of the three-layer inclined quadrangular pyramidal space frame structure. It ensures construction accuracy and space frame posture stability through multi-dimensional real-time monitoring and dynamic closed-loop adjustment. With the help of BIM technology, it realizes full-process digital control and data traceability of assembly, lifting, correction and unloading. It also enhances construction safety through graded loading, gradient unloading and multi-threshold safety judgment. Furthermore, it can meet the construction needs of different spans and complex working conditions through flexible and adaptable algorithms and modular assembly methods. It significantly improves the accuracy, safety, efficiency and controllability of construction, and provides a reliable technical solution for the installation of large-span three-layer inclined quadrangular pyramidal space frame structures. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 Flowchart of the construction method for the three-layer inclined quadrangular pyramidal space frame structure provided by the present invention; Figure 2 The construction system architecture diagram of the three-layer inclined quadrangular pyramidal space frame structure provided by the present invention. Detailed Implementation

[0018] 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.

[0019] To address the pain points of traditional construction methods, such as poor synchronization, limited monitoring dimensions, low efficiency, high safety risks, and difficulty in data traceability, this invention discloses a construction method for a three-layer inclined quadrangular pyramidal space frame structure, such as... Figure 1 As shown, it includes the following steps: S1. Configure a computer synchronous control system with adaptive algorithm, integrate multiple types of monitoring components, build a distributed control network, import grid parameters to generate dynamic control program, and preset synchronous displacement threshold, load safety threshold and environmental adaptation threshold. S2. Construct a 3D model of the space frame structure based on BIM technology, divide it into modular assembly units and label key information; assemble the space frame on the ground in order from the center to the periphery, and install temporary lifting tools and lower lifting point structures; verify and monitor components, hydraulic lifters and dynamic control programs by linking the 3D model of the space frame structure with the electrical control system. S3. Start the electrical control system and load the load in stages according to the preset load gradient. The monitoring components collect the load, displacement, levelness of the space frame and environmental parameters of the lifting points in real time. After the space frame is off the ground, pause and compare the monitoring results with the simulation data of the three-dimensional model of the space frame structure. After standing still without any abnormalities, the lifting will be carried out. S4. During the lifting process, the computer synchronous control system analyzes the displacement difference and load distribution of the lifting points through an adaptive algorithm. When the threshold is exceeded, the speed of the hydraulic lifter is automatically adjusted, prioritizing the adjustment of the speed of the high-load lifting points. The attitude and correction process of the space frame are visualized through a three-dimensional model of the space frame structure. S5. When the space frame is lifted to the preset distance from the design elevation, the support coordinate data of the three-dimensional model of the space frame structure are called to fine-tune the elevation of the lifting point; after docking, the unloading is carried out in stages according to the principle of "from the middle to the four sides + symmetry", and the stress on the support and the deflection of the space frame are monitored; after unloading is completed, a construction report is generated using the three-dimensional model of the space frame structure, and the hydraulic lifting device and temporary lifting tools are removed.

[0020] To address the problems in traditional space frame construction, such as the lack of a unified control hub, fragmented monitoring data transmission, and lack of adaptive response capability in lifting point adjustments, leading to poor construction synchronization and passive safety management, this embodiment aims to establish a core foundation for full-process dynamic closed-loop control. To ensure the accuracy and safety of subsequent improvement and correction processes, step S1 requires the establishment of an integrated intelligent monitoring and control system. The specific steps are as follows: A computer synchronous control host with a built-in adaptive algorithm is selected (the adaptive algorithm is used to dynamically optimize control parameters based on real-time monitoring data to achieve closed-loop adjustment of lifting point movements). Multiple types of monitoring components are deployed according to the distribution of lifting points on the grid structure and the location of key stress nodes to form a distributed control network consisting of monitoring components, edge computing nodes, a computer synchronous control system, and hydraulic actuators. Each monitoring component establishes a signal connection with the edge computing node, the edge computing node is connected to the computer synchronous control host through a communication link, and the hydraulic actuator is electrically connected to the output of the computer synchronous control host. The communication link adopts a wired and wireless redundancy design. The space frame parameters, including the space frame structure dimensions, node bearing capacity parameters, calculated lifting reaction force values, design elevation coordinates, and support constraint conditions, are imported into the computer synchronous control system. Based on the adaptive algorithm, a dynamic control program is automatically generated, consisting of lifting point coordinated action logic, data acquisition frequency control logic, and abnormal response triggering logic. By combining the mechanical properties of the space frame structure, construction safety standards, and environmental adaptation requirements, synchronous displacement thresholds, load safety thresholds, and environmental adaptation thresholds are preset and verified through simulated construction conditions to ensure that the requirements for attitude control accuracy and structural safety are met.

[0021] To achieve dynamic adaptation and precise control of lifting point movements, and to address the problem that traditional fixed-parameter algorithms struggle to cope with load fluctuations, environmental disturbances, and structural stress changes during construction, leading to adjustment lag and insufficient synchronization, this embodiment aims to ensure load balance and attitude stability during the lifting of the space frame, adapting to construction needs of different spans and complex working conditions. Therefore, the adaptive algorithm in S1 must be an algorithm that achieves dynamic closed-loop adjustment based on real-time monitoring data. It can be selected from a combination of one or more of the following algorithms: 1) Adaptive PID algorithm: By calculating the displacement difference of the lifting point, the load deviation and the rate of change of the deviation in real time, the proportional coefficient, integral coefficient and derivative coefficient are dynamically adjusted to achieve rapid response and precise adjustment of the lifting point action, which is suitable for synchronous lifting control of conventional span space frame. 2) Model Predictive Control Algorithm: Based on the mechanical model of the space frame structure and historical monitoring data, predict the subsequent displacement of the suspension points and the trend of load changes, output adjustment commands in advance, avoid the accumulation of attitude deviations, and adapt to large-span, high-rigidity three-layer inclined quadrangular pyramid space frames. 3) Fuzzy adaptive algorithm: By establishing a fuzzy rule base for displacement difference, load exceeding threshold degree and adjustment amount, nonlinear adjustment can be achieved without precise mathematical model, adapting to environmental disturbances (such as wind speed fluctuations) or load change scenarios. 4) Distributed collaborative adjustment algorithm: Based on the local monitoring data of edge computing nodes, it performs preliminary adjustment and receives global optimization instructions from the computer synchronous control system to achieve "local rapid response + global collaborative balance", which is suitable for the construction of space frame with multiple lifting points and large coverage.

[0022] To address the shortcomings of traditional space frame construction monitoring, which relies on a single dimension and incomplete capture of key data, covering only a portion of construction parameters and thus failing to promptly detect potential hazards such as load fluctuations, attitude deviations, environmental disturbances, and abnormal structural stress, thereby affecting the accuracy of adjustment decisions and construction safety, multi-dimensional monitoring is needed to achieve real-time acquisition and comprehensive perception of data throughout the entire process. This provides complete and accurate decision-making basis for adaptive algorithms and dynamic control programs, ensuring the effectiveness of load balancing adjustment, attitude correction, and safety threshold determination. The various monitoring components in S1 must cover the core control dimensions of construction, specifically including at least one of the following: 1) Load monitoring component: Installed at the connection between the temporary lifting device and the grid node at each lifting point, and at the output end of the hydraulic lifter, it is used to collect the tensile or compressive data borne by the lifting point in real time and reflect the load distribution status of each node; 2) Displacement monitoring component: Installed at key nodes of the space frame and the stroke end of the hydraulic lifter, it is used to collect the vertical and horizontal displacement of each lifting point in real time and simultaneously acquire the overall lifting stroke data of the space frame; 3) Attitude monitoring components: installed at the center node and key edge nodes of the space frame, used to monitor the levelness and tilt changes of the space frame in real time, reflecting the attitude deviation of the space frame during the lifting process; 4) Environmental monitoring components: installed in open areas around the construction site and above the grid structure to collect real-time data on wind speed, temperature and humidity of the construction environment to determine whether the environmental conditions meet the construction safety requirements. 5) Stress and strain monitoring components: installed at key load-bearing members and weld joints of the space frame, used to collect stress and strain data of members and joints in real time, and avoid the risk of excessive local stress in the structure.

[0023] To address the issues in traditional space frame assembly, such as the lack of force balance considerations in modular division, insufficient accuracy due to manual measurement for node positioning, disconnect between monitoring components and hydraulic lifter parameters and design models, and inefficient, fragmented verification processes, which consequently affect the synchronicity of subsequent lifting and construction safety, this embodiment aims to construct a digital assembly and verification system based on BIM technology. This system will enable precise division of assembly units, visual annotation of key information, and collaborative verification of equipment and models, laying a precise foundation for subsequent lifting and attitude correction processes. The specific steps in S2 are as follows: Based on the design drawings of the space frame structure, the parameters of the member nodes and the construction technical requirements, a fully parametric three-dimensional model of the space frame structure is constructed using BIM technology. This model needs to accurately reproduce the connection relationship of the space frame members, the node structure and the support position to ensure the consistency between the model and the actual construction object. Based on the stress characteristics of the space frame structure, transportation and hoisting capacity and on-site construction space conditions, modular assembly units are divided according to the principles of stress balance and size matching. The specifications of the members, node numbers, hoisting point coordinates, monitoring component installation positions and temporary hoisting tool connection node information of each unit are marked in the three-dimensional model of the space frame structure. Using the center node of the three-dimensional model of the space frame structure as a reference, an assembly platform is erected and leveled on the ground. Modular assembly units are then assembled sequentially from the center outwards. During the assembly process, the alignment accuracy of the nodes and the tightness of the connections between the members are checked against the three-dimensional model in real time. At the same time, temporary lifting tools and lower lifting point structures are installed according to the marked lifting point coordinates to ensure that the connection position and stress surface between the temporary lifting tools and the space frame nodes meet the design requirements and that the connection strength meets the lifting load requirements. Establish a data mapping relationship between the three-dimensional model of the space frame structure and the electrical control system, and import the installation parameters in the three-dimensional model of the space frame structure into the electrical control system; The monitoring components are activated to collect data and compare it with the preset parameters of the three-dimensional model of the grid structure to confirm that the monitoring range, signal transmission stability, and data accuracy meet the requirements. Action commands are issued through the electrical control system to verify the start-stop response, stroke adjustment accuracy, and alignment accuracy of the model lifting points. The initial lifting conditions are simulated to verify the accuracy of the dynamic control program in terms of the frequency of data collection, threshold judgment logic, and command output, ensuring the coordination and consistency between each device and the dynamic control program.

[0024] To address the issues of excessively rapid load application during the initial lifting phase of traditional space frame lifting, which can lead to structural impact, lack of systematic verification before liftoff, and reliance on a single safety assessment criterion, thus causing initial attitude deviation or structural damage during lifting, this embodiment requires a standardized process of "graded loading + real-time monitoring + simulation data comparison + static verification" to smoothly apply loads, comprehensively verify system reliability and initial structural stability, and ensure that the formal lifting is carried out safely. The specific steps in S3 are as follows: Confirm that the electrical control system, hydraulic lifter, monitoring components and distributed control network are in normal working condition, import the preset load gradient parameters and safety judgment criteria from the three-dimensional model of the grid structure into the electrical control system, and complete the parameter initialization; The electrical control system outputs control commands step by step according to the preset load gradient, driving the hydraulic lifter to perform staged loading. Each loading stage is smooth and uniform, avoiding sudden load changes. After each loading stage is completed, the structure remains in a preset position for a period of time to stabilize the stress on the space frame. Throughout the graded loading process, load data, displacement data, grid levelness data, and construction site environmental parameters of each lifting point are continuously collected through multiple types of monitoring components. After preliminary processing by edge computing nodes, the data are transmitted in real time to the computer synchronous control system. The computer synchronous control system determines whether the space frame has left the ground based on the data fed back by the displacement monitoring component. Once it is confirmed that the space frame has completely left the ground, it automatically controls the hydraulic lifter to stop loading. After the pause, the computer synchronous control system calls the load-displacement simulation data and levelness benchmark data in the three-dimensional model of the space frame structure and compares them with the collected actual data in multiple dimensions to verify whether the consistency of load distribution at each lifting point, displacement synchronization, and deviation of the space frame levelness meet the preset requirements. If the data comparison shows no abnormalities, the static setting program is initiated. During the static setting period, various parameters are continuously collected and monitored. When the static setting is completed and all parameters are still within the safe threshold range, the computer synchronous control system issues a formal lifting command, driving the hydraulic lifter to carry out a smooth lifting operation at a preset rate.

[0025] To address the issues that arise during the formal lifting of the space frame, factors such as dynamic load fluctuations, environmental interference, and structural stress changes can easily lead to asynchronous displacement of lifting points and uneven load distribution. Furthermore, traditional manual adjustments often suffer from lag and difficulty in real-time posture correction. This embodiment relies on the previously established intelligent monitoring and control system and BIM collaborative platform to construct a dynamic closed-loop correction mechanism of "high-frequency acquisition - real-time analysis - targeted adjustment - visual feedback." This ensures stable space frame posture and balanced load throughout the lifting process, mitigating the risk of structural damage. The specific steps in S4 are as follows: During the formal lifting of the space frame, multiple types of monitoring components collect displacement data, load data, and overall levelness data of each lifting point at preset high frequencies. After real-time preprocessing (removing outliers and standardizing data) by edge computing nodes, the data is continuously transmitted to the computer synchronous control system. The computer synchronous control system continuously calculates the received dynamic data through an adaptive algorithm, obtains the vertical displacement difference, horizontal displacement difference, and load distribution uniformity between each lifting point, and compares them in real time with the synchronous displacement threshold and load safety threshold preset by S1 to dynamically determine whether there is a deviation exceeding the threshold. When an over-threshold deviation is detected, the adaptive algorithm generates a targeted adjustment command (calculates a precise speed adjustment for high-load lifting points, synchronously matches the speed parameters of other lifting points, ensures that the grid structure is subjected to balanced forces during the adjustment process, and avoids secondary deviations) according to the logic of first balancing the load and then correcting the displacement synchronization. The command is then sent to the hydraulic lifter to adjust its operating speed in real time, and the closed-loop feedback adjustment continues until the deviation returns to the threshold range. By linking the three-dimensional model of the space frame structure with the real-time data of the computer synchronous control system, the dynamic attitude of the space frame, the position of the deviation exceeding the threshold, the adjustment command parameters and the correction effect are displayed synchronously in the three-dimensional model in the form of dynamic annotations, intuitively presenting the whole process of attitude change, which is convenient for construction personnel to monitor and intervene in real time.

[0026] To address the issues of insufficient precision in elevation fine-tuning during the final stage of traditional space frame lifting, large deviations in support connections, sudden changes in structural internal forces due to unreasonable unloading sequences, scattered and difficult-to-trace key data, and potential damage to installed structures during equipment removal, this embodiment uses the BIM model as a precise benchmark. A standardized finalization process of "deceleration fine-tuning + phased unloading + real-time monitoring + data aggregation" ensures precise support connection and stable unloading of the structure, while also achieving full traceability of the construction process. The specific steps of S5 are as follows: The computer synchronous control system continuously compares the current elevation of the space frame with the design elevation. When it is determined that the space frame has been raised to a preset distance from the design elevation, the lifting speed is automatically reduced, and the support coordinate data and node docking parameters in the three-dimensional model of the space frame structure are used as fine-tuning benchmarks. The computer synchronous control system issues elevation fine-tuning commands to each hydraulic lifter according to the logic of point-by-point calibration and group coordination. Based on the support coordinate data, it corrects the vertical height deviation of each lifting point to ensure that the alignment accuracy of the grid node and the support meets the design requirements. During the docking process, the attitude monitoring component verifies the grid level and node fit in real time until all docking is completed and the node connection is confirmed to be stable. After docking is completed, the computer synchronous control system starts the unloading program, dividing the unloading gradient according to the principle of "from the middle to the four sides + symmetry", and gradually reducing the output force of the hydraulic lifter from the initial load; after each unloading is completed, a preset time is allowed to allow the redistribution of internal forces in the grid structure to stabilize, avoiding structural impact caused by excessive unloading rate; During the unloading process, the load monitoring component and stress-strain monitoring component collect support force data and space frame deflection data in real time and compare them with the design force value and allowable deflection value in the three-dimensional model of the space frame structure. If any data abnormality occurs, the unloading is immediately paused and the cause is investigated. The process continues after the data returns to normal. After unloading is completed and the stability of the space frame structure is confirmed, the system automatically summarizes the assembly parameters, lifting process data, posture correction records, unloading data, and key indicators collected by monitoring components to generate a standardized construction process record report, ensuring data traceability. After the construction report is generated, the dismantling work shall be carried out in the order of first dismantling the hydraulic lifter and then the temporary lifting equipment. Before dismantling the hydraulic lifter, the signal and power connection between the electrical control system and the hydraulic lifter shall be cut off. When dismantling the temporary lifting equipment, avoid collisions or damage to the grid nodes and supports to ensure that the installed grid structure is not affected.

[0027] and Figure 1 Corresponding to the method described above, this embodiment of the invention also provides a construction system for a three-layer inclined quadrangular pyramidal space frame structure, used for... Figure 1 The specific implementation of the method, the construction system for a three-layer inclined quadrangular pyramidal space frame structure provided in this embodiment of the invention, can be applied to computer terminals or various mobile devices, such as... Figure 2 As shown, it specifically includes: The intelligent monitoring and control module is equipped with a computer synchronous control system with adaptive algorithms. It integrates multiple types of monitoring components, builds a distributed control network, imports grid parameters to generate dynamic control programs, presets synchronous displacement thresholds, load safety thresholds and environmental adaptation thresholds, and receives monitoring data and outputs control commands in real time. The BIM collaborative management module is used to build a 3D model of the space frame structure based on BIM technology, divide it into modular assembly units and mark key information; establish a data mapping relationship with the electrical control system to realize the linkage verification of monitoring components, hydraulic lifters and dynamic control programs; provide functions for simulation data comparison, support coordinate calling and construction process data summary and report generation, and simultaneously support the visualization of space frame posture and correction process. The hydraulic synchronous execution module is electrically connected to the intelligent monitoring and control module. It is used to receive control commands and execute graded loading, fine adjustment of lifting point elevation, and graded unloading actions based on the principle of "from the middle to the four sides + symmetry". The attitude adaptive correction module, in conjunction with the intelligent monitoring and control module and the BIM collaborative management module, is used to analyze the displacement difference of the lifting points and the load distribution in real time through adaptive algorithms. When the threshold is exceeded, a hydraulic lifter speed adjustment command is generated, prioritizing the adjustment of the speed of the high-load lifting points. The correction process is simultaneously fed back to the BIM collaborative management module for visualization.

[0028] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A construction method for a three-layer inclined quadrangular pyramidal space frame structure, characterized in that, Includes the following steps: S1. Configure a computer synchronous control system with adaptive algorithm, integrate multiple types of monitoring components, build a distributed control network, import grid parameters to generate dynamic control program, and preset synchronous displacement threshold, load safety threshold and environmental adaptation threshold. S2. Construct a 3D model of the space frame structure based on BIM technology, divide it into modular assembly units and label key information; assemble the space frame on the ground in order from the center to the periphery, and install temporary lifting tools and lower lifting point structures; verify and monitor components, hydraulic lifters and dynamic control programs by linking the 3D model of the space frame structure with the electrical control system. S3. Start the electrical control system and load the load in stages according to the preset load gradient. The monitoring components collect the load, displacement, levelness of the space frame and environmental parameters of the lifting points in real time. After the space frame is off the ground, pause and compare the monitoring results with the simulation data of the three-dimensional model of the space frame structure. After standing still without any abnormalities, the lifting will be carried out. S4. During the lifting process, the computer synchronous control system analyzes the displacement difference and load distribution of the lifting points through an adaptive algorithm. When the threshold is exceeded, the speed of the hydraulic lifter is automatically adjusted, prioritizing the adjustment of the speed of the high-load lifting points. The attitude and correction process of the space frame are visualized through a three-dimensional model of the space frame structure. S5. When the space frame is lifted to the preset distance from the design elevation, the support coordinate data of the three-dimensional model of the space frame structure are called to fine-tune the elevation of the lifting point; after docking, the unloading is carried out in stages from the middle to the surrounding area and in a symmetrical manner, and the stress on the support and the deflection of the space frame are monitored; after unloading is completed, a construction report is generated using the three-dimensional model of the space frame structure, and the hydraulic lifting device and temporary lifting tools are removed.

2. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 1, characterized in that, The specific steps of S1 are as follows: A computer synchronous control host with built-in adaptive algorithm is selected, and multiple types of monitoring components are deployed according to the distribution of the grid suspension points and the location of key stress nodes to form a distributed control network consisting of monitoring components, edge computing nodes, computer synchronous control system and hydraulic actuators; The space frame parameters, including the space frame structure dimensions, node bearing capacity parameters, calculated lifting reaction force values, design elevation coordinates, and support constraint conditions, are imported into the computer synchronous control system. Based on the adaptive algorithm, a dynamic control program is automatically generated, consisting of lifting point coordinated action logic, data acquisition frequency control logic, and abnormal response triggering logic. Based on the mechanical properties of the space frame structure, construction safety standards, and environmental adaptation requirements, preset synchronous displacement thresholds, load safety thresholds, and environmental adaptation thresholds are established and verified through simulated construction conditions.

3. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 1, characterized in that, In S1, the adaptive algorithm is an algorithm that realizes dynamic closed-loop regulation based on real-time monitoring data, including one or more of the following: adaptive PID algorithm, model predictive control algorithm, fuzzy adaptive algorithm, and distributed collaborative regulation algorithm.

4. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 2, characterized in that, In S1, the multiple monitoring components include at least one of the following: load monitoring component, displacement monitoring component, attitude monitoring component, environmental monitoring component, and stress-strain monitoring component.

5. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 1, characterized in that, The specific steps of S2 are as follows: Based on the space frame structure design drawings, member node parameters and construction technical requirements, a fully parametric three-dimensional model of the space frame structure is constructed using BIM technology. Based on the stress characteristics of the space frame structure, transportation and hoisting capacity and on-site construction space conditions, modular assembly units are divided according to the principles of stress balance and size matching. The specifications of the members, node numbers, hoisting point coordinates, monitoring component installation positions and temporary hoisting tool connection node information of each unit are marked in the three-dimensional model of the space frame structure. Using the center node of the three-dimensional model of the space frame structure as a reference, an assembly platform is erected and leveled on the ground. Modular assembly units are then assembled sequentially from the center outwards. At the same time, temporary lifting devices and lower lifting point structures are installed according to the marked lifting point coordinates. Establish a data mapping relationship between the three-dimensional model of the space frame structure and the electrical control system, and import the installation parameters in the three-dimensional model of the space frame structure into the electrical control system; The monitoring components are activated to collect data and compare it with the preset parameters of the three-dimensional model of the space frame structure to confirm that the monitoring range, signal transmission stability and data accuracy meet the requirements; action commands are issued through the electrical control system to verify the start and stop response of the hydraulic lifter, the stroke adjustment accuracy and the alignment accuracy of the model lifting points; the initial lifting conditions are simulated to verify the accuracy of the dynamic control program in terms of the frequency of monitoring data collection, threshold judgment logic and command output.

6. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 4, characterized in that, The specific steps for S3 are as follows: Confirm that the electrical control system, hydraulic lifter, monitoring components and distributed control network are in normal working condition, import the preset load gradient parameters and safety judgment criteria from the three-dimensional model of the grid structure into the electrical control system, and complete the parameter initialization; The electrical control system outputs control commands step by step according to the preset load gradient, driving the hydraulic lifter to perform graded loading. After each loading is completed, the system stays for a preset time to make the stress on the grid structure tend to stabilize. Throughout the graded loading process, load data, displacement data, grid levelness data, and construction site environmental parameters of each lifting point are continuously collected through multiple types of monitoring components. After preliminary processing by edge computing nodes, the data are transmitted in real time to the computer synchronous control system. The computer synchronous control system determines whether the space frame has left the ground based on the data fed back by the displacement monitoring component. Once it is confirmed that the space frame has completely left the ground, it automatically controls the hydraulic lifter to stop loading. After the pause, the computer synchronous control system calls the load-displacement simulation data and levelness benchmark data in the three-dimensional model of the space frame structure and compares them with the collected actual data in multiple dimensions to verify whether the consistency of load distribution at each lifting point, displacement synchronization, and deviation of the space frame levelness meet the preset requirements. If the data comparison shows no abnormalities, the static setting program is initiated. During the static setting period, various parameters are continuously collected and monitored. When the static setting is completed and all parameters are still within the safe threshold range, the computer synchronous control system issues a formal lifting command, driving the hydraulic lifter to carry out a smooth lifting operation at a preset rate.

7. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 1, characterized in that, The specific steps of S4 are as follows: During the formal lifting of the space frame, multiple types of monitoring components collect displacement data, load data, and overall levelness data of each lifting point at preset high frequencies. After real-time preprocessing by edge computing nodes, the data is continuously transmitted to the computer synchronous control system. The computer synchronous control system continuously calculates the received dynamic data through an adaptive algorithm, obtains the vertical displacement difference, horizontal displacement difference, and load distribution uniformity between each lifting point, and compares them in real time with the synchronous displacement threshold and load safety threshold preset by S1 to dynamically determine whether there is a deviation exceeding the threshold. When an over-threshold deviation is detected, the adaptive algorithm generates a targeted adjustment command and sends it to the hydraulic lifter to adjust its operating speed in real time, following the logic of first balancing the load and then correcting the displacement synchronization. The closed-loop feedback adjustment continues until the deviation returns to the threshold range. By linking the 3D model of the space frame structure with the real-time data of the computer synchronous control system, the dynamic attitude of the space frame, the position of the deviation exceeding the threshold, the adjustment command parameters and the correction effect are displayed synchronously in the 3D model in the form of dynamic annotations, intuitively presenting the whole process of attitude change.

8. The construction method of a three-layer inclined quadrangular pyramidal space frame structure according to claim 4, characterized in that, The specific steps of S5 are as follows: The computer synchronous control system continuously compares the current elevation of the space frame with the design elevation. When it is determined that the space frame has been raised to a preset distance from the design elevation, the lifting speed is automatically reduced, and the support coordinate data and node docking parameters in the three-dimensional model of the space frame structure are used as fine-tuning benchmarks. The computer synchronous control system issues elevation fine-tuning commands to each hydraulic lifter according to the logic of point-by-point calibration and group coordination. Based on the support coordinate data, it corrects the vertical height deviation of each lifting point to ensure that the alignment accuracy of the grid node and the support meets the design requirements. During the docking process, the attitude monitoring component verifies the grid level and node fit in real time until all docking is completed and the node connection is confirmed to be stable. After docking is completed, the computer synchronous control system starts the unloading program, dividing the unloading gradient according to the principle of from the center outward and symmetrically, and gradually reducing the output force of the hydraulic lifter from the initial load; after each unloading is completed, a preset time is allowed to allow the redistribution of internal forces in the grid structure to tend to stabilize. During the unloading process, the load monitoring component and stress-strain monitoring component collect support force data and space frame deflection data in real time and compare them with the design force value and allowable deflection value in the three-dimensional model of the space frame structure. If any data abnormality occurs, the unloading is immediately paused and the cause is investigated. The process continues after the data returns to normal. After unloading is completed and the stability of the space frame structure is confirmed, the system automatically summarizes the assembly parameters, lifting process data, attitude correction records, unloading data, and key indicators collected by the monitoring components to generate a standardized construction process record report. After the construction report is generated, the demolition work is carried out in the order of first using the hydraulic lifting device and then the temporary lifting equipment.

9. A construction system for implementing a three-layer inclined quadrangular pyramidal space frame structure according to any one of claims 1-8, characterized in that, include: The intelligent monitoring and control module is equipped with a computer synchronous control system with adaptive algorithms. It integrates multiple types of monitoring components, builds a distributed control network, imports grid parameters to generate dynamic control programs, presets synchronous displacement thresholds, load safety thresholds and environmental adaptation thresholds, and receives monitoring data and outputs control commands in real time. The BIM collaborative management module is used to build a 3D model of the space frame structure based on BIM technology, divide it into modular assembly units and mark key information; establish a data mapping relationship with the electrical control system to realize the linkage verification of monitoring components, hydraulic lifters and dynamic control programs; provide functions for simulation data comparison, support coordinate calling and construction process data summary and report generation, and simultaneously support the visualization of space frame posture and correction process. The hydraulic synchronous execution module is electrically connected to the intelligent monitoring and control module. It is used to receive control commands and execute graded loading, fine adjustment of lifting point elevation, and graded unloading actions based on the principle of symmetry from the center to the periphery. The attitude adaptive correction module, in conjunction with the intelligent monitoring and control module and the BIM collaborative management module, is used to analyze the displacement difference of the lifting points and the load distribution in real time through adaptive algorithms. When the threshold is exceeded, a hydraulic lifter speed adjustment command is generated, prioritizing the adjustment of the speed of the high-load lifting points. The correction process is simultaneously fed back to the BIM collaborative management module for visualization.

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