Construction technology of net rack jacking

Abstract

The application discloses a kind of net rack jacking construction technology, it is related to net rack construction technical field, wherein, the steps of net rack jacking construction technology include setting multiple jacks in the bottom of net rack, for jacking the net rack;Multiple strain gauges are set on the net rack, the micro-strain size of the strain gauge is detected by the strain tester, the stress size corresponding to the strain gauge is converted by the micro-strain size;Multiple jacks are driven to jacking the net rack, whether the jacking process is abnormal is judged by the stress size of each strain gauge.The technical scheme provided by the application judges whether the jacking process is abnormal by detecting the stress size of each place on the net rack, and improves the problem that the net rack is deviated and deformed due to uneven stress on structural members and jacks during jacking.

Description

Technical Field

[0001] This invention relates to the field of space frame construction technology, and in particular to a space frame jacking construction process. Background Technology

[0002] Currently, the traditional construction process for lifting large-scale space frames uses a unit-based "four-point space frame overall lifting" method. This method mainly relies on visual observation and measurement with a steel tape measure after lifting to measure the lifting difference. However, this method is not practical for lifting space frames with dense column spacing and relatively small stress on the members. The traditional method can easily cause uneven stress on the structural members and jacks during the lifting process, and can also easily cause the space frame to shift and deform, leading to problems such as member damage and space frame displacement, affecting construction quality and even delaying the construction period. Summary of the Invention

[0003] The main objective of this invention is to propose a jacking construction process for space frames, which aims to improve the problem of space frame displacement and deformation caused by uneven stress on structural members and jacks during the jacking process.

[0004] To achieve the above objectives, the present invention proposes a space frame jacking construction process, the steps of which include: Multiple jacks are installed at the bottom of the space frame to lift it. Multiple strain gauges are set on the space frame, and the micro-strain magnitude of each strain gauge is detected by a strain tester. The stress magnitude corresponding to the strain gauge is calculated from the micro-strain magnitude. Multiple jacks are driven to lift the space frame, and the lifting process is judged to be abnormal by measuring the stress of each strain gauge.

[0005] In one embodiment, the step of setting multiple jacks at the bottom of the space frame to lift the space frame includes: All the jacks are extended without load to approach the corresponding lifting position of the space frame; Adjust the extension stroke of the jack and keep it consistent.

[0006] In one embodiment, prior to the step of extending all the jacks unloaded to approach and contact the corresponding lifting position of the space frame, the method further includes: Blow air from the oil circuit corresponding to each of the aforementioned jacks.

[0007] In one embodiment, the step of driving multiple jacks to lift the space frame and determining whether the lifting process is abnormal by measuring the stress magnitude of each strain gauge includes: The space frame is lifted a first preset distance using the jacks and held for a first preset time period. The jacking process is judged to be abnormal by the stress magnitude of each strain gauge.

[0008] In one embodiment, the step of determining whether the jacking process is abnormal based on the stress magnitude of each strain gauge includes: When the detected stress of the strain gauge exceeds a preset stress value; For the strain gauge whose stress exceeds the preset stress value, the jack near it is unloaded by returning oil to adjust the stress of the strain gauge so that the stress of the strain gauge is ≤ the design allowable value of the member in the space frame × preset ratio.

[0009] In one embodiment, the step of determining whether the jacking process is abnormal based on the stress magnitude of each strain gauge includes: When the detected stress magnitude of the strain gauge does not exceed the preset stress value, but the direction of the stress changes during the process of the jack lifting the space frame a first preset distance; The elevation of the jacks near the strain gauges where the direction of stress changes is detected, and each elevation is adjusted to within a preset error range.

[0010] In one embodiment, the step of determining whether the jacking process is abnormal based on the stress magnitude of each strain gauge includes: The space frame is divided into regions. When the difference in the average stress of the strain gauges in two opposite regions in the same direction is greater than a preset difference; Using a level as a reference, the height of the jack corresponding to the region with higher average stress is reduced and / or the height of the jack corresponding to the region with lower average stress is increased, so that the two regions opposite each other in the same direction remain horizontal, and the difference in the average stress of the strain gauges in the two regions is less than a preset difference.

[0011] In one embodiment, before the step of driving the plurality of jacks to lift the space frame and determining whether the lifting process is abnormal by measuring the stress magnitude of each strain gauge, the method further includes: The space frame is lifted a second preset distance using the jacks and held for a second preset time period to check whether the welds of the space frame are cracked.

[0012] In one embodiment, the first preset distance is greater than the second preset distance.

[0013] In one embodiment, after the step of driving the plurality of jacks to lift the space frame and determining whether the lifting process is abnormal by measuring the stress magnitude of each strain gauge, the method further includes: The space frame is lifted a third preset distance using the jacks; Check the elevation of each of the jacks; When the difference between the maximum elevation and the minimum elevation of each jack is greater than a preset error, adjust each jack to ensure that the difference between the maximum elevation and the minimum elevation of each jack is less than or equal to the preset error. When the elevation of the jack is less than the preset elevation, return to the step "lift the grid structure by the jack a third preset distance" until the elevation of the jack is greater than or equal to the preset elevation.

[0014] The technical solution of this invention improves the problem of displacement and deformation of the space frame caused by uneven stress on structural members and jacks during the jacking process by detecting the stress magnitude at various points on the space frame. Attached Figure Description

[0015] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a flowchart illustrating the first embodiment of the space frame lifting construction process provided by the present invention; Figure 2 This is a flowchart illustrating the second embodiment of the space frame jacking construction process provided by the present invention; Figure 3 This is a flowchart illustrating the third embodiment of the space frame lifting construction process provided by the present invention; Figure 4 This is a flowchart illustrating the fourth embodiment of the space frame lifting construction process provided by the present invention; Figure 5 This is a flowchart illustrating the fifth embodiment of the space frame lifting construction process provided by the present invention; Figure 6 This is a flowchart illustrating the sixth embodiment of the space frame lifting construction process provided by the present invention. Figure 7 This is a flowchart illustrating the seventh embodiment of the space frame lifting construction process provided by the present invention. Figure 8 This is a flowchart illustrating the eighth embodiment of the space frame lifting construction process provided by the present invention. Figure 9 This is a flowchart illustrating the ninth embodiment of the space frame jacking construction process provided by the present invention.

[0017] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] Currently, the traditional construction process for lifting large-scale space frames uses a unit-based "four-point space frame overall lifting" method. This method mainly relies on visual observation and measurement with a steel tape measure after lifting to measure the lifting difference. However, this method is not practical for lifting space frames with dense column spacing and relatively small stress on the members. The traditional method can easily cause uneven stress on the structural members and jacks during the lifting process, and can also easily cause the space frame to shift and deform, leading to problems such as member damage and space frame displacement, affecting construction quality and even delaying the construction period.

[0022] This invention proposes a construction process for lifting a space frame. The steps of the space frame lifting construction process are as follows: Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of a space frame jacking construction process according to the present invention.

[0023] The steps of the space frame jacking construction process include: Step S1: Set multiple jacks at the bottom of the space frame to lift the space frame; Step S2: Set multiple strain gauges on the space frame, detect the micro-strain magnitude of each strain gauge using a strain tester, and calculate the stress magnitude corresponding to the strain gauge using the micro-strain magnitude; Step S4: Drive multiple jacks to lift the space frame, and determine whether the lifting process is abnormal by measuring the stress of each strain gauge.

[0024] Multiple jacks are arranged at the bottom of the space frame to provide multi-point synchronous lifting support, replacing traditional single-point or four-point lifting. This ensures the overall structural integrity of the space frame and avoids localized stress concentration. However, the multiple jacks must remain synchronized to maintain a constant stress on the space frame and each jack, preventing uneven stress distribution. By placing multiple strain gauges on the space frame, the micro-strain of the space frame members is converted into stress values, transforming visual judgment into quantitative data monitoring. This allows for data-driven detection of changes in the stress on the space frame, making the stress state measurable and controllable. Based on real-time stress data, the jack movements are synchronously controlled to dynamically identify lifting anomalies for timely intervention and correction.

[0025] To address the issues of asynchronous multi-point jacking and inconsistent initial contact, and to prevent eccentric loading, excessive local stress, and displacement deformation immediately after jacking of the space frame, the construction process steps for space frame jacking are as follows: Figure 2 , Figure 2 This is a flowchart illustrating a second embodiment of a space frame jacking construction process according to the present invention.

[0026] The steps of setting up multiple jacks at the bottom of the space frame to lift the space frame include: Step S12: All the jacks extend unloaded to approach the lifting position corresponding to the contact space frame; Step S13: Adjust the extension stroke of the jack to maintain consistency.

[0027] All jacks should be positioned without load beforehand to ensure reliable contact at each lifting point. Pressure sensors installed in the hydraulic circuits of the jacks can be used to monitor the pressure, ensuring consistent pressure across all jacks. This prevents some jacks from being suspended and eliminates uneven initial stress. The initial extension length of all jacks should be standardized to achieve a synchronized lifting benchmark. This ensures consistent stress and lifting speed at all points during the lifting start, preventing the space frame from tilting. Furthermore, the jack bases can be reinforced, and their size can be increased to reduce or prevent settlement from interfering with subsequent stress monitoring. These steps reduce abnormal structural stress during the initial lifting phase, ensure consistent initial benchmarks, result in smoother subsequent lifting, more accurate space frame positioning, and improved construction safety and stability.

[0028] If air remains in the hydraulic circuit of a hydraulic jack, it can cause problems such as unstable pressure, delayed stroke, jamming during extension and retraction, and failure to synchronize during lifting. This directly leads to uneven stress, displacement, and deformation of the space frame. Therefore, air must be purged during the lifting preparation stage. For the methods and steps of space frame lifting construction, please refer to... Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of a space frame jacking construction process according to the present invention.

[0029] Before step S12, the following are also included: Step S11: Bleed the oil circuit corresponding to each jack.

[0030] Air bubbles and air are expelled from the jack's hydraulic circuits, eliminating gas compression gaps within the hydraulic system. This ensures the circuits are fully filled with hydraulic oil, guaranteeing continuous, stable, and delay-free pressure transmission. It provides a reliable hydraulic foundation for subsequent jack extension under no-load, uniform stroke, and synchronized lifting. Without air interference, multiple jacks operate in unison, avoiding lift differences caused by air resistance in the hydraulic circuits. Precise hydraulic transmission prevents sudden pressure fluctuations and insufficient support. Eliminating jamming and lag at the source of the hydraulic system prevents localized overload, tilting, and deformation of the space frame. This reduces lifting failures, lowers the risk of structural damage, and makes the entire process more controllable.

[0031] Lifting a space frame involves heavy loads, large spans, and multi-point coordinated operations. If lifting is continuous and uninterrupted, it is impossible to detect potential problems such as sudden stress changes, uneven stress distribution, and local overloads in a timely manner, which can easily lead to space frame displacement, deformation, and damage to members. Therefore, an intermittent lifting logic that includes lifting, pressure stabilization, and detection is adopted to control risks within each short segment of the lifting process.

[0032] The methods and steps of the space frame jacking construction process are as follows: Figure 4 , Figure 4 This is a flowchart illustrating the fourth embodiment of a space frame lifting construction process according to the present invention.

[0033] Step S4 includes: Step S41: Raise the space frame a first preset distance using the jacks and maintain it for a first preset time period; Step S42: Determine whether the jacking process is abnormal by measuring the stress magnitude of each strain gauge.

[0034] A staged, segmented jacking method is employed to avoid structural disturbances and stress control issues caused by excessively high jacking in a single operation. Maintaining the jacking position for a period allows for full stress transfer and structural stability, eliminating transient dynamic stress interference. This provides a stable, accurate, and readable structural state for stress monitoring. Strain gauge-measured stress serves as the quantitative basis for judgment, replacing manual visual inspection for accurate and objective assessments. Real-time identification of anomalies such as uneven stress distribution, excessive stress, off-center loading, and displacement enables early detection and intervention.

[0035] If the stress in local members exceeds the design allowable range during the lifting of the space frame, it can directly lead to member bending, deformation, weld cracking, or even structural instability. Traditional processes cannot identify and quickly unload excessive stress in real time, which can easily cause safety and quality accidents. Therefore, a closed-loop control procedure is established, including stress over-limit judgment and unloading with the nearest jack. The method and steps of the space frame lifting construction process are described in [reference needed]. Figure 5 , Figure 5 This is a flowchart illustrating the fifth embodiment of a space frame jacking construction process according to the present invention.

[0036] Step S42 includes: Step S421: When the detected stress magnitude of the strain gauge exceeds a preset stress value; Step S422: Unload the jacks near the strain gauge whose stress exceeds the preset stress value by returning oil, so as to adjust the stress of the strain gauge to satisfy: the stress of the strain gauge ≤ the allowable design value of the members in the space frame × preset ratio.

[0037] Real-time comparison of measured stress with preset stress values ​​quickly locates overloaded members and dangerous areas. Precise unloading of overloaded areas prevents continuous stress accumulation; stress is controlled within the member's design allowable value multiplied by a preset ratio, maintaining a safety margin; the preset ratio is generally set to 80%. Stress adjustment brings the overall stress on the space frame back to a safe range. Unloading is only applied to jacks near the overload area, without affecting other points, ensuring uninterrupted lifting synchronization and construction efficiency. Proactive stress control replaces post-construction repairs, reducing damage repair costs and ensuring construction progress.

[0038] During the jacking of the space frame, even if the stress value does not exceed the limit, a sudden change in the stress direction of the members indicates that the space frame in that area has experienced local tilting, inconsistent support elevations, or a reversal of the stress state (from compression to tension or vice versa), which is a hidden anomaly. If the elevation is not corrected in time, it will quickly develop into displacement, deformation, and deterioration of the member stress. Therefore, a stress direction anomaly judgment procedure and a nearby jack elevation calibration procedure are set up.

[0039] The methods and steps of the space frame jacking construction process are as follows: Figure 6 , Figure 6 This is a flowchart illustrating the sixth embodiment of a space frame jacking construction process according to the present invention.

[0040] Step S42 includes: Step S423: When the stress detected by the strain gauge does not exceed the preset stress value, but the direction of the stress changes during the process of the jack lifting the space frame a first preset distance; Step S424: Detect the elevation of the jacks near the strain gauge where the stress direction changes, and adjust each elevation to within a preset error range.

[0041] This method captures hidden anomalies where numerical values ​​appear normal but the stress state is reversed, providing a more comprehensive view than simply looking at stress magnitude. It accurately locates problem areas with inconsistent elevations and localized misalignments. Using abnormal stress direction as a signal, it directionally checks the corresponding jack elevations. By unifying elevations within preset error ranges, it restores the horizontal orientation of the space frame, returning the members to their normal stress directions. It corrects elevation deviations and stress reversals before stress exceeds limits or the structure deforms, preventing potential problems. Using stress direction as a judgment criterion is more sensitive and allows for more timely and accurate correction than simply measuring elevation.

[0042] When lifting a large-area space frame, normal stress at a single point does not mean that the overall stress is balanced. If the stress difference in symmetrical areas in the same direction is too large, it will cause the space frame to tilt, twist, and become unbalanced. Single-point monitoring alone cannot detect the overall deviation. It is necessary to compare the average stress of different areas and correct the deviation symmetrically to ensure the overall level and uniform stress.

[0043] The methods and steps of the space frame jacking construction process are as follows: Figure 7 , Figure 7 This is a flowchart illustrating the seventh embodiment of a space frame jacking construction process according to the present invention.

[0044] Step S42 includes: Step S425: Divide the space frame into regions. When the difference in the average stress of the strain gauges in two opposite regions in the same direction is greater than a preset difference; Step S426: Using a level as a reference, lower the height of the jack corresponding to the region with higher average stress and / or raise the height of the jack corresponding to the region with lower average stress, so that the two opposite regions in the same direction remain horizontal, and the difference in the average stress of the strain gauges in the two regions is less than a preset difference.

[0045] The space frame is divided into regions, and average stress is used to reflect the overall stress state of each region, eliminating interference from single-point fluctuations. By comparing the stress difference between symmetrical regions in the same direction, overall eccentric loading, tilting, and imbalance can be quickly identified. Using a level as a reference, high-stress areas are lowered and low-stress areas are raised to achieve precise two-way correction. The symmetrical regions are then restored to levelness, and the stress difference is controlled within a preset range, returning to overall equilibrium.

[0046] Before the formal jacking (S4), a low-height, short-duration trial jacking is conducted using a smaller second pre-set distance to identify hidden defects in the space frame welds, joints, and support system. This helps prevent major safety risks such as structural failure, deformation, and collapse due to weld cracking during the formal jacking. The methods and steps for the space frame jacking construction process are detailed in [reference needed]. Figure 8 , Figure 8 This is a flowchart illustrating the eighth embodiment of a space frame jacking construction process according to the present invention.

[0047] Step S4 is preceded by: Step S3: Use the jack to lift the space frame a second preset distance and maintain it for a second preset time period to check whether the weld of the space frame is cracked.

[0048] The risks of the formal jacking are transferred to the trial jacking stage at a low height and low load. Even if weld problems arise, they are easy to handle and pose no major danger. The short-stroke trial jacking followed by the long-stroke formal jacking conforms to the construction principle of staged jacking and gradual loading, avoiding impact damage to welds caused by a single jacking. The integrity of welds, joints, and supports is confirmed in advance to ensure the overall structural safety of the space frame during the formal jacking.

[0049] After stress monitoring and correction (S4) is completed, the space frame still needs to be continuously jacked up in sections to the design elevation. If only jacking is performed without cyclical elevation checks, it will lead to accumulated height differences at multiple support points, space frame tilting, offsetting, and stress imbalance. Therefore, a closed-loop process of small-section, graded jacking, elevation detection, dynamic adjustment, and cyclical positioning is established to ensure synchronous jacking throughout the process and precise final placement. The methods and steps of the space frame jacking construction process are described in [reference needed]. Figure 9 , Figure 9 This is a flowchart illustrating the ninth embodiment of a space frame jacking construction process according to the present invention.

[0050] After step S4, the following also includes: Step S5: Raise the space frame a third preset distance using the jacks; Step S6: Check the elevation of each jack; Step S7: When the difference between the maximum elevation and the minimum elevation of each jack is greater than the preset error, adjust each jack to ensure that the difference between the maximum elevation and the minimum elevation of each jack is less than or equal to the preset error. Step S8: When the elevation of the jack is less than the preset elevation, return to the step "lift the grid structure by the jack a third preset distance" so that the elevation of the jack is greater than or equal to the preset elevation.

[0051] The third preset jacking distance is achieved through segmented, tiered jacking to avoid excessive height difference amplification and structural disturbance caused by excessive jacking at once, and to facilitate control of synchronization accuracy. The elevation of each jack is monitored (elevation can be monitored by setting displacement sensors on each jack), acquiring real-time height data of all support points to quantitatively determine if there are any height differences exceeding limits. If the elevation exceeds the limit, adjustments are made: the difference between the maximum and minimum elevations is controlled within a preset error range, forcibly ensuring multi-point synchronization and eliminating the risk of tilting. This process is repeated in units of "jacking – monitoring – adjustment" until the design elevation is reached, achieving closed-loop automatic positioning. The elevation of each segment is checked and corrected to prevent the accumulation of height differences, ensuring the space frame does not tilt, twist, or deform. Segmented, gradual, and real-time adjustments prevent local overload and member damage caused by excessive height differences. Comprehensive coverage from stress control to elevation control ensures the space frame is stable, level, and precisely positioned.

[0052] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A construction process for lifting a space frame, characterized in that, The steps of the space frame jacking construction process include: Multiple jacks are installed at the bottom of the space frame to lift it. Multiple strain gauges are set on the space frame, and the micro-strain magnitude of each strain gauge is detected by a strain tester. The stress magnitude corresponding to the strain gauge is calculated from the micro-strain magnitude. Multiple jacks are driven to lift the space frame, and the lifting process is judged to be abnormal by measuring the stress of each strain gauge.

2. The space frame jacking construction process as described in claim 1, characterized in that, The steps of setting up multiple jacks at the bottom of the space frame to lift the space frame include: All the jacks are extended without load to approach the corresponding lifting position of the space frame; Adjust the extension stroke of the jack and keep it consistent.

3. The space frame jacking construction process as described in claim 2, characterized in that, Before the step of extending all the jacks unloaded to approach and contact the corresponding lifting position of the space frame, the method further includes: Blow air from the oil circuit corresponding to each of the aforementioned jacks.

4. The space frame jacking construction process as described in claim 1, characterized in that, The steps of driving multiple jacks to lift the space frame and determining whether the lifting process is abnormal by measuring the stress magnitude of each strain gauge include: The space frame is lifted a first preset distance using the jacks and held for a first preset time period. The jacking process is judged to be abnormal by the stress magnitude of each strain gauge.

5. The space frame jacking construction process as described in claim 4, characterized in that, The step of determining whether the jacking process is abnormal by analyzing the stress magnitude of each strain gauge includes: When the detected stress of the strain gauge exceeds a preset stress value; For the strain gauge whose stress exceeds the preset stress value, the jack near it is unloaded by returning oil to adjust the stress of the strain gauge so that the stress of the strain gauge is ≤ the design allowable value of the member in the space frame × preset ratio.

6. The space frame jacking construction process as described in claim 4, characterized in that, The step of determining whether the jacking process is abnormal by analyzing the stress magnitude of each strain gauge includes: When the detected stress magnitude of the strain gauge does not exceed the preset stress value, but the direction of the stress changes during the process of the jack lifting the space frame a first preset distance; The elevation of the jacks near the strain gauges where the direction of stress changes is detected, and each elevation is adjusted to within a preset error range.

7. The space frame jacking construction process as described in claim 4, characterized in that, The step of determining whether the jacking process is abnormal by analyzing the stress magnitude of each strain gauge includes: The space frame is divided into regions. When the difference in the average stress of the strain gauges in two opposite regions in the same direction is greater than a preset difference; Using a level as a reference, the height of the jack corresponding to the region with higher average stress is reduced and / or the height of the jack corresponding to the region with lower average stress is increased, so that the two regions opposite each other in the same direction remain horizontal, and the difference in the average stress of the strain gauges in the two regions is less than a preset difference.

8. The space frame jacking construction process as described in claim 4, characterized in that, Before the step of driving multiple jacks to lift the space frame and determining whether the lifting process is abnormal by measuring the stress magnitude of each strain gauge, the method further includes: The space frame is lifted a second preset distance using the jacks and held for a second preset time period to check whether the welds of the space frame are cracked.

9. The space frame jacking construction process as described in claim 4, characterized in that, The first preset distance is greater than the second preset distance.

10. The space frame jacking construction process as described in claim 1, characterized in that, After the step of driving multiple jacks to lift the space frame and determining whether the lifting process is abnormal by measuring the stress magnitude of each strain gauge, the method further includes: The space frame is lifted a third preset distance using the jacks; Check the elevation of each of the jacks; When the difference between the maximum elevation and the minimum elevation of each jack is greater than a preset error, adjust each jack to ensure that the difference between the maximum elevation and the minimum elevation of each jack is less than or equal to the preset error. When the elevation of the jack is less than the preset elevation, return to the step "lift the grid structure by the jack a third preset distance" until the elevation of the jack is greater than or equal to the preset elevation.

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