Subway extension deformation control crustal stress regulation and control method

Abstract

The invention relates to the technical field of subway double-side extension, and discloses a subway extension deformation control crustal stress regulation and control method which comprises the following steps: acquiring geological data of a subway extension site, and constructing an excavation stress model by using the geological data; obtaining a stress change report of the stress release area under the construction process by using the excavation stress model; acquiring crustal stress release information according to the stress change report and the characteristic data of the plastomer; and acquiring real-time crustal stress data of the stress release area under the construction process and simulated crustal stress data corresponding to the excavation stress model, and comparing the real-time crustal stress data with the simulated crustal stress data to obtain crustal stress release correction information. According to the system, high-precision geological data acquisition, dynamic finite element modeling and intelligent real-time regulation and control are deeply fused, and a closed-loop crustal stress control system is constructed. The whole process innovation of accurate prediction, dynamic regulation and control and resource optimization is realized, and a safe and efficient technical model is provided for metro extension construction in urban dense districts.

Description

Technical Field

[0001] The invention relates to the technical field of subway double-sided extension, and in particular to a method for controlling ground stress in subway extension deformation. Background Art

[0002] With the acceleration of urbanization, subways are increasingly needed as an efficient urban transportation solution. However, during the construction of subway tunnels, especially in the case of double-sided excavation, the redistribution of longitudinal ground stress caused by ground disturbance caused by excavation activities will have an adverse effect on the subway structure, resulting in phenomena such as subway vibration and train jumping, which seriously affects riding comfort and safety.

[0003] In addition, long-term geostress may cause permanent deformation of subway structures, threatening the safety of passengers and increasing maintenance costs. In traditional construction plans, in order to deal with these problems, tunnel lining reinforcement, optimized excavation methods or installation of seismic isolation devices are usually adopted, but these methods often cannot effectively release the impact of geostress on surrounding commercial complexes, and may also increase the complexity and cost of the project. Summary of the invention

[0004] The purpose of the present invention is to provide a ground stress control system for subway expansion and construction to solve the problem of the unintelligent financial system in the existing survey and design industry.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a method for controlling ground stress during subway expansion and construction deformation, comprising the following steps: Step 1: Obtain geological data of the subway construction site and use the geological data to build an excavation stress model; Step 2: Use the excavation stress model to obtain the stress change report of the stress release zone under the construction process; Step 3: Obtain ground stress release information based on the stress change report and the characteristic data of the plastic body; Step 4: Obtain the real-time geostress data of the stress release zone under the construction process and the simulated geostress data corresponding to the excavation stress model, and compare the real-time geostress data with the simulated geostress data to obtain geostress release correction information.

[0006] Furthermore, the acquisition of geological data of the subway construction site and the use of the geological data to construct an excavation stress model include the following steps: Step 11: Use the soil layer information and groundwater information obtained from the subway expansion site survey as geological data; Step 12: Construct an initial stress model using geological data based on finite element analysis; Step 13: Set the stress release area in the initial stress model to obtain the excavation stress model; in, The soil layer information includes soil layer type, soil layer thickness, soil layer distribution and mechanical parameters; The mechanical parameters include soil density, soil internal friction angle, and soil cohesion; The groundwater information includes groundwater level, groundwater flow data and groundwater pressure; The stress release zone is a band with a width of 5-10m away from the subway.

[0007] Furthermore, the excavation stress model is expressed by the formula: Express; in, is the excavation stress, which indicates the stress distribution at a horizontal distance x from the excavation surface at time t; is the excavation depth at time t; is the weight of balancing soil layer information in the whole stress model; L is the soil layer action value; To balance the weight of groundwater information in the entire stress model; W is the groundwater action value; To balance the weight of plastic body stress in the whole stress model; is the plastic body stress, indicating the excavation depth at time t and the stress distribution function of the plastic body at the horizontal distance x; Specifically, ;in, is the coefficient of the soil type of the i-th layer; n is the number of soil layers; is the thickness of the i-th soil layer; is the soil density of the i-th layer; is the internal friction angle of the i-th layer of soil; is the cohesion of the i-th layer of soil; ;in, is the groundwater level influence coefficient; is the influence coefficient of groundwater flow direction, is the flow rate, is the flow angle; is the groundwater pressure influence coefficient, and the calculation formula is: , It is the weight of water.

[0008] ;in, is the stress response coefficient of the plastic body; is the excavation depth at time t and the stress distribution function at horizontal distance x; is the influence function of the stress release zone, indicating whether the horizontal distance x from the excavation surface is in the stress release zone at time t; specifically, , where k1, k2 and k3 are adjustment coefficients, representing the effects of excavation depth, excavation speed and horizontal distance on stress distribution respectively; H is the total excavation depth; is the excavation speed; x s is the centerline position of the stress relief zone; q is the width of the stress relief zone; like ,but , otherwise 0.

[0009] Furthermore, the method of obtaining a stress change report of a stress release zone under a construction process by using an excavation stress model includes the following steps: Step 21: Simulate different time points of the construction process in the excavation stress model to obtain construction stress distribution information at different time points in the stress release zone; Step 22: Fitting the construction stress distribution information at different time points to obtain a fitting stress report of the stress release area; Step 23: Determine whether there is a stress value exceeding the control threshold in the fitting stress report. If so, optimize the construction plan; otherwise, use the fitting stress report as a stress change report.

[0010] Furthermore, the layout position of the plastic body is the area where the ground uplift amount in the stress release area is greater than the uplift threshold in the construction stress distribution information. , k is the elastic coefficient of the stress release zone, is the stress value difference between two construction times at a certain point.

[0011] Furthermore, the fitting stress report of the stress release zone obtained by fitting the construction stress distribution information at different time points includes the following steps: Step 221: extracting construction stress distribution data at multiple discrete time points in the construction process, and verifying its integrity; Step 222: Based on the nonlinear characteristics of the time interval and stress distribution, a cubic spline interpolation method is selected, whose interpolation function satisfies the second-order continuous and differentiable boundary conditions, and a time-stress distribution model is established; Step 223: interpolating and generating a stress distribution curve of a continuous time series according to the time-stress distribution model, and extracting the interpolated stress value at each horizontal distance in the stress release area; Step 224: construct a dynamic stress cloud map of the stress release zone based on the interpolated stress value, and mark the maximum stress value and its corresponding position and time node; Step 225: Compare the dynamic stress cloud map with the simulated ground stress data of the excavation stress model to generate a fitting stress report including stress deviation analysis; Step 226: If the deviation between the interpolated stress value and the simulated geostress data exceeds the preset tolerance threshold, reselect the interpolation method or adjust the interpolation parameters and repeat steps 223 to 225 until the deviation meets the preset tolerance threshold.

[0012] Further, the obtaining of ground stress release information according to the stress change report and the characteristic data of the plastic body comprises the following steps: Step 31: Obtain continuous stress distribution data of the stress release zone from the stress change report, and calculate the release strength of all plastic bodies at each time node; Step 32: determine whether the release strength of the plastic body obtained in step 31 will cause the stress release area to bulge. If so, compensate the release strength of the plastic body near the bulge and execute step 32 again. Otherwise, execute step 33. Step 33: Fit the release strength of the same plastic body at all time points, and use the fitted release strength and the layout position of the plastic body as ground stress release information.

[0013] Beneficial effects of the invention: This system deeply integrates high-precision geological data acquisition, dynamic finite element modeling and intelligent real-time control to build a closed-loop ground stress control system. It realizes the full process innovation of accurate prediction-dynamic control-resource optimization, and provides a safe and efficient technical model for the expansion of subways in densely populated urban areas.

[0014] By introducing deformable materials near subway tunnels, the longitudinal ground stress caused by excavation is effectively absorbed and released, which greatly reduces the external force on the subway structure, thereby significantly reducing the risk of subway deformation and improving riding comfort and safety.

[0015] Compared with traditional reinforcement measures, the present invention provides a more flexible and economical solution, reduces unnecessary construction steps and material usage, shortens construction period, and reduces overall cost.

[0016] Combining modern sensing technology and data analysis, the present invention realizes real-time monitoring and automatic regulation of ground stress, making the entire system more intelligent, able to quickly respond to environmental changes, and ensuring the long-term effectiveness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Flow chart of the ground stress regulation method for deformation control in subway expansion. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clarify the technical solutions in the embodiments of the present invention; it is clearly described in detail. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1, taking the extension project of a section of Tianjin Metro Line 6 as an example, the project requires the construction of a comprehensive commercial building on both sides of the existing subway. The geological conditions in the construction area are complex, including soft clay layers, sand layers and high groundwater levels. In order to ensure construction safety and prevent ground subsidence or uplift from causing damage to surrounding buildings, this system is used to dynamically control ground stress.

[0020] like Figure 1 As shown, a method for controlling ground stress during subway expansion and deformation control comprises the following steps: Step 1: Obtain geological data of the subway expansion site and use the geological data to construct an excavation stress model. The geological data is provided by the surveying and mapping unit. Before using it to construct the excavation stress model, data cleaning is required to ensure the accuracy of model construction. Based on the above geological data, finite element analysis software is used to simulate the stress distribution under different excavation stages. This process not only takes into account the influence of static loads, but also provides an accurate distribution map of the ground stress field, which helps to identify potential risk areas, provides a scientific basis for the subsequent construction plan, and reduces blindness.

[0021] Step 2: Use the excavation stress model to obtain the stress change report of the stress release zone under the construction process. After completing the excavation stress model, it is necessary to further simulate the specific construction process, such as segmented excavation, support structure installation, etc. After each process is completed, a corresponding stress change report will be generated. These reports usually contain information such as trend graphs of stress changes over time, maximum and minimum stress values ​​at key points, etc. In this way, the changes in ground stress during the construction process can be intuitively observed, and feedback on the changes in ground stress during the construction process is realized, which facilitates timely adjustment of construction strategies.

[0022] Step 3: Obtain ground stress release information based on the stress change report and the characteristic data of the plastic body. The plastic body refers to a hydraulic expansion device, such as a bladder grouting device. Combined with the data in the stress change report, the stress release amount of each plastic body during the entire construction period is calculated to evaluate the overall ground stress release status. The plastic body improves the ability of the ground stress release mechanism to resist the risk of uplift and ensures the effective management and control of ground stress during construction.

[0023] Step 4: Obtain the real-time geostress data of the stress release zone under the construction process and the simulated geostress data corresponding to the excavation stress model, and compare the real-time geostress data with the simulated geostress data to obtain the geostress release correction information. A sensor network is arranged at the construction site to continuously monitor the changes in geostress. These sensors can provide a continuous data stream for subsequent analysis. The geostress data obtained by real-time monitoring is compared with the previous simulation results to find the differences and correct the model parameters accordingly to improve the prediction accuracy. A closed-loop feedback mechanism between theoretical prediction and actual observation is realized, which improves the accuracy of the model. This enables the engineering team to detect deviations at the first time and respond quickly, ensuring the safety and efficiency of construction.

[0024] In summary, this system deeply integrates high-precision geological data acquisition, dynamic finite element modeling and intelligent real-time control to build a closed-loop ground stress control system. It realizes the full process innovation of accurate prediction-dynamic control-resource optimization, and provides a safe and efficient technical model for the expansion of subways in densely populated urban areas.

[0025] Obtaining geological data of the subway construction site and using the geological data to build an excavation stress model includes the following steps: Step 11: The soil layer information and groundwater information obtained from the survey of the subway extension site are used as geological data. Soil layer information includes soil layer type, soil layer thickness, soil layer distribution and mechanical parameters; mechanical parameters include soil density, soil internal friction angle and soil cohesion; groundwater information includes groundwater level, groundwater flow data and groundwater pressure. Tianjin is located in the alluvial belt of the North China Plain. The geology is mainly composed of multiple layers of soft clay and fine sand interlayers, with significant high groundwater level and highly permeable sand layer characteristics. Groundwater information mainly affects the model in the pore water pressure-dominated effective stress, the permeability-induced sand layer liquefaction risk, the salinization-affected soil mechanical parameters, and the dynamic water level fluctuations that trigger the model iteration. During construction, due to the neglect of the coupling effect of groundwater flow direction and sand layer permeability, the initial model predicted a settlement of 1.2 mm, and the measured value reached 2.0 mm; after supplementing the groundwater data, the secondary prediction value of the model after correction was 1.9 mm, with an error of only 5%.

[0026] Step 12: Construct an initial stress model using geological data based on finite element analysis; Step 13: Set the stress release area in the initial stress model to obtain the excavation stress model; Among them, the stress release zone is a width band of 5-10m away from the subway.

[0027] The excavation stress model realizes the refined prediction and control of ground stress in subway expansion projects under complex geological conditions through multi-factor coupling, dynamic weight allocation and precise spatial positioning. Its core advantages are reflected in the following aspects: The cut stress model is given by the formula: Express; in, is the excavation stress, which indicates the stress distribution at a horizontal distance x from the excavation surface at time t; is the excavation depth at time t; is the weight of balancing soil layer information in the whole stress model; L is the soil layer action value; To balance the weight of groundwater information in the entire stress model; W is the groundwater action value; To balance the weight of plastic body stress in the whole stress model; is the plastic body stress, indicating the excavation depth at time t and the stress distribution function of the plastic body at the horizontal distance x; Specifically, Among them, T i is the coefficient of the soil type of the i-th layer; n is the number of soil layers; H i is the thickness of the i-th soil layer; is the soil density of the i-th layer; is the internal friction angle of the i-th layer of soil; is the soil cohesion of the i-th layer; the model automatically allocates attention according to the geological conditions, such as paying more attention to soil layer parameters in soft soil layers and paying more attention to groundwater impact in sand layers.

[0028] ;in, is the groundwater level influence coefficient; is the influence coefficient of groundwater flow direction, V is the flow velocity, is the flow angle; is the groundwater pressure influence coefficient, and the calculation formula is: , It is the weight of water.

[0029] ;in, is the stress response coefficient of the plastic body; is the excavation depth at time t and the stress distribution function at horizontal distance x; is the influence function of the stress release zone, indicating whether the point at a horizontal distance x from the excavation surface is located in the stress release zone at time t; Specifically, , where k1, k2 and k3 are adjustment coefficients, representing the effects of excavation depth, excavation speed and horizontal distance on stress distribution respectively; H is the total excavation depth; is the excavation speed; is the centerline position of the stress release zone; q is the width of the stress release zone; if ,but , otherwise 0.

[0030] The following steps are used to obtain the stress change report of the stress release zone under the construction process using the excavation stress model: Step 21: Simulate different time points of the construction process in the excavation stress model to obtain the construction stress distribution information at different time points in the stress release zone. The collection frequency is related to the construction progress. For example, if the construction stress distribution information is collected at a frequency of once every 6 hours, the profit data at several discrete time points can be obtained. Step 22: Fit the construction stress distribution information at different time points to obtain the fitted stress report of the stress release zone. Fit the stress data at discrete time points into a continuous curve to generate an "excavation stress-time curve" to show the trend of stress change over time. Summarize key data, including the maximum stress value at each time point, the corresponding position, the percentage deviation from the threshold, etc. The stress change report includes an excavation stress change time effect diagram (the horizontal axis is time, the vertical axis is stress value, and the threshold line is marked) and a key data table (time, maximum stress, distance from the excavation surface, whether it exceeds the threshold).

[0031] Step 23: Determine whether there is a stress value exceeding the control threshold in the fitting stress report. If so, optimize the construction plan, otherwise use the fitting stress report as a stress change report. For example, the control threshold of the soft clay layer is 120kPa, and the control threshold of the sand layer is 150kPa. The control threshold for rainy season construction should be reduced by 10% for safety redundancy. If the stress in a certain area exceeds the limit, the excavation speed should be reduced immediately to reduce instantaneous disturbances. Increase the support density in the stress concentration area (such as increasing the anchor spacing from 20m to 10m) or upgrade the support type. Among them, the construction plan parameters include excavation depth, excavation width, excavation speed, construction sequence, etc.

[0032] The layout position of the plastic body is the area where the ground uplift in the stress release area is greater than the uplift threshold in the construction stress distribution information. , k is the elastic coefficient of the stress release zone (the stress release zone may be composed of soft soil layers, sand layers, etc., and its elastic coefficient is a composite value, and the specific value is provided by the surveying and mapping party), It is the stress value difference between two construction times at a certain point. The uplift threshold refers to the maximum allowable uplift in the "Technical Specifications for Urban Subway Construction", that is, U≤3mm.

[0033] The size and distribution of the plastic body depend on the amount of ground uplift. Taking the selection of the bladder grouting device for the plastic body as an example, first outline the range of the ground uplift exceeding the threshold value, and evenly arrange the bladder grouting device and cover the ground uplift area. The layout depth should be no less than 1.5 times the expected excavation depth.

[0034] Fitting the construction stress distribution information at different time points to obtain the fitting stress report of the stress release area includes the following steps: Step 221: Extract construction stress distribution data at multiple discrete time points in the construction process and check its integrity. Extract stress data at multiple discrete time points and check data integrity, such as missing value filling and outlier removal.

[0035] Step 222: Based on the nonlinear characteristics of the time interval and stress distribution, a cubic spline interpolation method is selected, and its interpolation function satisfies the second-order continuous and differentiable boundary conditions to establish a time-stress distribution model. According to the nonlinear characteristics of the data (such as sudden rise or slow change of stress), a cubic spline interpolation method is selected to construct a piecewise polynomial function to ensure that the curve is smooth at the nodes.

[0036] Step 223: According to the time-stress distribution model, a stress distribution curve of a continuous time series is interpolated and the interpolated stress value at each horizontal distance in the stress release area is extracted.

[0037] Step 224: construct a dynamic stress cloud map of the stress release zone based on the interpolated stress value, and mark the maximum stress value and its corresponding position and time node. Map the interpolated stress value to a spatiotemporal distribution cloud map, use color gradient to represent the stress magnitude, and mark the maximum value and its spatiotemporal coordinates.

[0038] Step 225: Compare the dynamic stress cloud map with the simulated ground stress data of the excavation stress model, and generate a fitting stress report including stress deviation analysis.

[0039] Step 226: If the deviation between the interpolated stress value and the simulated geostress data exceeds a preset tolerance threshold (e.g., >5%), reselect the interpolation method or adjust the interpolation parameters and repeat steps 223 to 225 until the deviation meets the preset tolerance threshold.

[0040] Obtaining ground stress release information based on the stress change report and the characteristic data of the plastic body includes the following steps: Step 31: Obtain continuous stress distribution data of the stress release zone from the stress change report, and calculate the release strength of all plastic bodies at each time node; Step 32: determine whether the release strength of the plastic body obtained in step 31 will cause the stress release area to bulge. If so, compensate the release strength of the plastic body near the bulge and execute step 32 again. Otherwise, execute step 33. Step 33: Fit the release strength of the same plastic body at all time points, and use the fitted release strength and the layout position of the plastic body as ground stress release information.

[0041] Example 2, based on a ground stress control method for subway expansion deformation control provided in Example 1, this example provides a construction method for a ground stress control system, and a bladder-type stress compensation and release device is arranged according to the selected plastic body arrangement position in the ground stress control system, which specifically requires the lowering of drilling bag, reserved grouting, drainage pipe, grouting filling and other links. After the compensation and release device is set up, stress release or compensation is performed according to the ground stress release information to adjust the deformation of structures such as subways. After the project is completed, the bladder hole is solidified.

[0042] The above description is only a preferred specific implementation manner of the present application, and is not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for controlling ground stress during subway expansion and construction deformation, characterized in that: The following steps are involved: Step 1: Obtain geological data of the subway construction site and use the geological data to build an excavation stress model; Step 2: Use the excavation stress model to obtain the stress change report of the stress release zone under the construction process; Step 3: Obtain ground stress release information based on the stress change report and the characteristic data of the plastic body; Step 4: Obtain the real-time geostress data of the stress release zone under the construction process and the simulated geostress data corresponding to the excavation stress model, and compare the real-time geostress data with the simulated geostress data to obtain geostress release correction information.

2. A method for controlling ground stress during subway expansion and construction deformation according to claim 1, characterized in that: The method of obtaining geological data of the subway construction site and constructing an excavation stress model using the geological data includes the following steps: Step 11: Use the soil layer information and groundwater information obtained from the subway expansion site survey as geological data; Step 12: Construct an initial stress model using geological data based on finite element analysis; Step 13: Set the stress release area in the initial stress model to obtain the excavation stress model; in, The soil layer information includes soil layer type, soil layer thickness, soil layer distribution and mechanical parameters; The mechanical parameters include soil density, soil internal friction angle, and soil cohesion; The groundwater information includes groundwater level, groundwater flow data and groundwater pressure; The stress release zone is a band with a width of 5-10m away from the subway.

3. A method for controlling ground stress during subway expansion and construction deformation according to claim 2, characterized in that: The excavation stress model is expressed as: Express; in, is the excavation stress, which indicates the stress distribution at a horizontal distance x from the excavation surface at time t; is the excavation depth at time t; is the weight of balancing soil layer information in the whole stress model; L is the soil layer action value; To balance the weight of groundwater information in the entire stress model; W is the groundwater action value; To balance the weight of plastic body stress in the whole stress model; is the plastic body stress, indicating the excavation depth at time t and the stress distribution function of the plastic body at the horizontal distance x; in, is the coefficient of the soil type of the i-th layer; n is the number of soil layers; is the thickness of the i-th soil layer; is the soil density of the i-th layer; is the internal friction angle of the i-th layer of soil; is the soil cohesion of the i-th layer; ;in, is the groundwater level influence coefficient; is the influence coefficient of groundwater flow direction, is the flow rate, is the flow angle; is the groundwater pressure influence coefficient, and the calculation formula is: , is the weight of water, ;in, is the stress response coefficient of the plastic body; is the excavation depth at time t and the stress distribution function at horizontal distance x; is the influence function of the stress release zone, indicating whether the point at a horizontal distance x from the excavation surface is located in the stress release zone at time t; , where k1, k2 and k3 are adjustment coefficients, representing the effects of excavation depth, excavation speed and horizontal distance on stress distribution respectively; H is the total excavation depth; is the excavation speed; x s is the centerline position of the stress relief zone; q is the width of the stress relief zone; like ,but , otherwise 0.

4. A method for controlling ground stress during subway expansion and construction deformation according to claim 3, characterized in that: The method of obtaining a stress change report of a stress release zone under a construction process by using an excavation stress model comprises the following steps: Step 21: Simulate different time points of the construction process in the excavation stress model to obtain construction stress distribution information at different time points in the stress release zone; Step 22: Fitting the construction stress distribution information at different time points to obtain a fitting stress report of the stress release area; Step 23: Determine whether there is a stress value exceeding the control threshold in the fitting stress report. If so, optimize the construction plan; otherwise, use the fitting stress report as a stress change report.

5. A method for controlling ground stress during subway expansion and construction deformation according to claim 4, characterized in that: The layout position of the plastic body is the area in the construction stress distribution information where the ground uplift in the stress release zone is greater than the uplift threshold, and the ground uplift U=k×ΔS, k is the elastic coefficient of the stress release zone, and ΔS is the stress value difference between two construction times at a certain point.

6. A method for controlling ground stress during subway expansion and construction deformation according to claim 4, characterized in that: The fitting stress report of the stress release zone obtained by fitting the construction stress distribution information at different time points comprises the following steps: Step 221: extracting construction stress distribution data at multiple discrete time points in the construction process, and verifying its integrity; Step 222: Based on the nonlinear characteristics of the time interval and stress distribution, a cubic spline interpolation method is selected, whose interpolation function satisfies the second-order continuous and differentiable boundary conditions, and a time-stress distribution model is established; Step 223: interpolating and generating a stress distribution curve of a continuous time series according to the time-stress distribution model, and extracting the interpolated stress value at each horizontal distance in the stress release area; Step 224: construct a dynamic stress cloud map of the stress release zone based on the interpolated stress value, and mark the maximum stress value and its corresponding position and time node; Step 225: Compare the dynamic stress cloud map with the simulated ground stress data of the excavation stress model to generate a fitting stress report including stress deviation analysis; Step 226: If the deviation between the interpolated stress value and the simulated geostress data exceeds the preset tolerance threshold, reselect the interpolation method or adjust the interpolation parameters and repeat steps 223 to 225 until the deviation meets the preset tolerance threshold.

7. A method for controlling ground stress during subway expansion and construction deformation according to claim 6, characterized in that: The step of obtaining ground stress release information according to the stress change report and the characteristic data of the plastic body comprises the following steps: Step 31: Obtain continuous stress distribution data of the stress release zone from the stress change report, and calculate the release strength of all plastic bodies at each time node; Step 32: determine whether the release strength of the plastic body obtained in step 31 will cause the stress release area to bulge. If so, compensate the release strength of the plastic body near the bulge and execute step 32 again. Otherwise, execute step 33. Step 33: Fit the release strength of the same plastic body at all time points, and use the fitted release strength and the layout position of the plastic body as ground stress release information.

Images