Monitoring method for upheaval of deep foundation pit excavation stand column pile

Abstract

The invention provides a monitoring method for upheaval of a vertical column pile in deep foundation pit excavation. The monitoring method comprises the steps that S1, a three-dimensional display graph of upheaval conditions of the vertical column pile in a foundation pit and the wall top of an underground diaphragm wall is constructed based on Matlab software; and S2, the upheaval conditions of the stand column piles and the underground diaphragm wall are monitored on the basis of the constructed three-dimensional display graph. According to the method, the effect of monitoring the upheaval of the column pile in the deep foundation pit engineering is remarkably improved through a three-dimensional display graph display expression method, and compared with a traditional static data table, the monitoring method can visually display upheaval distribution and change trend of the column pile, helps a manager to quickly recognize an abnormal area and take measures in time, and improves the working efficiency. Therefore, the engineering safety is enhanced. In addition, the three-dimensional curved surface fitting technology effectively makes up blind areas of fixed monitoring points, comprehensiveness and accuracy of data are achieved, real-time monitoring and analysis of the state of the stand column pile are optimized, linkage analysis of the stand column pile and the underground diaphragm wall is provided, and construction management and decision are optimized.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit engineering construction, and in particular to a monitoring method for the uplift of column piles during deep foundation pit excavation. Background Art

[0002] At present, in the process of deep foundation pit construction, the control of column pile uplift is a key link to ensure construction safety. For the monitoring of column settlement of traditional structures, usually only two data, cumulative value and daily change, are provided, which are presented in the form of static data reports. However, this method cannot directly provide detailed differential settlement information, making the data presentation less intuitive. There are great limitations in timely finding, analyzing and judging potential safety hazards, which are specifically reflected in the following points:

[0003] 1. Single data display format: Existing column pile monitoring data is usually presented in a static table format, lacking a dynamic and intuitive display method. This single data display format makes it difficult for managers to quickly and intuitively understand the spatial distribution and changes of column piles in the foundation pit, affecting decision-making efficiency and real-time monitoring.

[0004] 2. Lack of intuitive comparison ability: The position and deformation of the column piles in the foundation pit have complex spatial laws, and traditional table data cannot effectively display these laws. The lack of intuitive comparison ability makes it difficult for managers to accurately understand the state changes of the column piles in different time periods, thus affecting the assessment of project safety and stability.

[0005] 3. Fixed monitoring point limitations: Pile monitoring usually relies on a small number of fixed monitoring points, which cannot fully cover the overall behavior of the piles in the foundation pit. The use of fixed monitoring points can easily lead to the appearance of monitoring blind spots, especially in the complex environment inside the foundation pit. This limitation affects the comprehensiveness and accuracy of the monitoring data.

[0006] 4. Unable to realize linkage monitoring of column piles and underground continuous walls: During the excavation of deep foundation pits, the deformation of column piles is often closely related to the surrounding supporting structures (such as ground wall continuous walls). Existing monitoring reports usually only focus on the settlement and displacement of the column piles themselves, ignoring the linkage deformation problem with surrounding structures such as ground walls and underground walls. Due to the lack of comprehensive monitoring of the interaction between column piles and ground walls and underground continuous walls, it is impossible to effectively display the synchronous or differential deformation of the two in space.

[0007] In view of the shortcomings of the prior art in presenting the monitoring results of column pile uplift in deep foundation pit projects in static data tables, technical personnel in this field have been looking for solutions. Summary of the invention

[0008] The object of the present invention is to provide a monitoring method for the uplift of column piles in deep foundation pit excavation, so as to solve the problem of using traditional static data tables to present the monitoring results of the uplift of column piles in deep foundation pit engineering.

[0009] In order to solve the above technical problems, the present invention provides a monitoring method for the uplift of column piles in deep foundation pit excavation, and the monitoring method for the uplift of column piles in deep foundation pit excavation comprises the following steps:

[0010] S1. Construct a three-dimensional display diagram of the uplift of the column piles in the foundation pit and the top of the underground continuous wall based on Matlab software;

[0011] S2. Monitor the uplift of column piles and underground continuous walls based on the constructed three-dimensional display image.

[0012] Optionally, in the method for monitoring the uplift of column piles in deep foundation pit excavation, step S1 includes the following sub-steps:

[0013] S11. Define the outer boundary of the foundation pit:

[0014] According to the position and geometric shape of the underground continuous wall in the foundation pit, the plane coordinates of each corner point are set, and the closed plane of the underground continuous wall formed by each corner point is defined as the outer boundary of the foundation pit;

[0015] S12. Define the column pile uplift measuring points and the underground continuous wall top uplift measuring points, and determine the real-time three-dimensional coordinates of each measuring point:

[0016] According to the project planning or monitoring requirements, M column pile uplift measuring points and N underground continuous wall top uplift measuring points are set;

[0017] According to the position of each measuring point, determine the x-axis coordinate and y-axis coordinate of each measuring point;

[0018] According to the monitoring data of each measuring point provided by the monitoring unit every day, the z-axis coordinates of each measuring point are updated in real time;

[0019] S13, data visualization: visualize the real-time three-dimensional coordinates of each measuring point;

[0020] S14, foundation pit grid division: determine the grid range based on the outer boundary of the foundation pit determined in S11 and perform grid division;

[0021] S15, surface fitting: using interpolation technology to perform surface fitting on the real-time three-dimensional coordinates of each measuring point determined by S12;

[0022] S16. Result display: display the result of surface fitting.

[0023] Optionally, in the monitoring method for uplift of column piles in deep foundation pit excavation, in S11, the closed plane of the underground continuous wall is represented by a set of continuous coordinate points as follows:

[0024] plane_points={(x i ,y i ,0)|i=1,2,…,n};

[0025] Among them, plane_points represents the coordinate point set of the closed plane, (x i ,y i ) represents the plane coordinates of each corner point, and n represents the number of corner points of the underground continuous wall.

[0026] Optionally, in the method for monitoring the uplift of column piles in deep foundation pit excavation, S14 includes the following steps:

[0027] S141, determining the grid range of the foundation pit area: determining the boundary of the grid based on the minimum x-axis coordinate, the maximum x-axis coordinate, the minimum y-axis coordinate, and the maximum y-axis coordinate of the outer boundary of the foundation pit;

[0028] S142, dividing the grid according to the set resolution.

[0029] Optionally, in the monitoring method for uplift of pillar piles in deep foundation pit excavation, in S141, the boundary of the grid of the foundation pit area is determined using the following formula:

[0030] min_x=min(plane_points(:,1));

[0031] max_x=max(plane_points(:,1));

[0032] min_y=min(plane_points(:,2));

[0033] max_y=max(plane_points(:,2)).

[0034] Optionally, in the monitoring method for uplift of pillar piles in deep foundation pit excavation, in S142, dividing the grid according to the set resolution includes the following steps:

[0035] Set the mesh range to:

[0036] x=linspace(min_x,max_x,grid_size);

[0037] y=linspace(min_y,max_y,grid_size);

[0038] Among them, grid_size represents the generated grid size;

[0039] Based on the meshgrid function, a two-dimensional grid coordinate system is generated:

[0040] [X,Y] = meshgrid(x,y);

[0041] Wherein, [X, Y] includes the x-axis coordinate and y-axis coordinate of each grid point in the entire foundation pit area. Optionally, in the monitoring method for uplift of deep foundation pit excavation columns, S13 includes the following steps:

[0042] S131, 3D scatter plot: based on MATLAB's scatter3 function, the real-time 3D coordinates of each measuring point are plotted, so that the real-time 3D coordinates of each measuring point are displayed in 3D space;

[0043] S132. Color differentiation: different colors are used to mark the column pile uplift measuring points and the underground continuous wall top uplift measuring points, respectively, so as to identify the positions of different measuring points in three-dimensional space and the corresponding uplift values ​​by colors.

[0044] Optionally, in the method for monitoring the uplift of column piles in deep foundation pit excavation, S15 includes the following steps:

[0045] Surface fitting is performed based on the following formula:

[0046]

[0047] Among them, λ i (x,y) is the interpolation function, z i is the uplift value of the known measuring point;

[0048] Based on the griddata function, interpolation is performed according to the existing measurement point data, which can be expressed by the following formula:

[0049] Z=griddata(xdata,ydata,zdata,X,Y,'cubic').

[0050] Optionally, in the method for monitoring the uplift of column piles in deep foundation pit excavation, S15 further includes the following steps:

[0051] Based on the contour function, contour lines are superimposed on the three-dimensional surface after surface fitting to show the different height levels of the uplift; wherein the contour lines are expressed by the following formula:

[0052] f(x,y)=z0;

[0053] Among them, z0 is a specific height, and the function value is the contour line corresponding to this height.

[0054] Optionally, in the method for monitoring the uplift of column piles in deep foundation pit excavation, S16 includes the following steps:

[0055] Based on the text function, data is annotated for each measurement point in the surface fitting result.

[0056] The monitoring method for uplift of deep foundation pit excavation columns provided by the present invention has the following beneficial effects:

[0057] 1) Integrated display of comprehensive information: The monitoring method of the present invention introduces a three-dimensional display method, which can more comprehensively and intuitively display the uplift of column piles and underground continuous walls, making monitoring more efficient and accurate.

[0058] 2) Quickly identify problem areas: The 3D display can help project managers quickly identify areas with large or abnormal pile uplift, which may pose safety hazards or require special attention. By promptly identifying problems and taking appropriate measures, project risks can be effectively reduced.

[0059] 3) Make up for the lack of fixed monitoring points: Through the surface fitting method, the spatial distribution of the uplift of the column piles in the foundation pit and the uplift of the top of the underground continuous wall is fully displayed, overcoming the problem of incomplete data or blind spots caused by fixed measuring points in traditional monitoring methods, and improving the comprehensiveness and accuracy of monitoring.

[0060] 4) Linkage analysis of column piles and underground continuous walls: The 3D display simultaneously shows the uplift of column piles and underground continuous wall tops in the foundation pit, realizing linkage monitoring and analysis between column piles and underground continuous walls, helping project managers to better understand the mutual influence between the two, and providing more accurate decision-making basis to ensure the overall safety and stability of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0062] Figure 1 is a schematic diagram of a closed plane of an underground continuous wall in one embodiment of the present invention;

[0063] Figure 2 It is a schematic diagram of the positions of the column pile uplift measuring points and the underground continuous wall top uplift measuring points in one embodiment of the present invention;

[0064] Figure 3 It is a real-time three-dimensional coordinate schematic diagram of the column pile uplift measuring point and the underground continuous wall top uplift measuring point in one embodiment of the present invention;

[0065] Figure 4 It is a three-dimensional display diagram of the column pile uplift and the underground continuous wall top uplift after surface fitting in one embodiment of the present invention;

[0066] Figure 5 It is a three-dimensional display diagram of the column pile uplift and the top uplift of the underground continuous wall superimposed with contour lines in one embodiment of the present invention;

[0067] Figure 6 It is a three-dimensional display diagram of the uplift of the column pile after being linked with the underground continuous wall in one embodiment of the present invention;

[0068] Figure 7 It is a three-dimensional display expression process diagram of the uplift of column piles at each stage of deep foundation pit excavation in one embodiment of the present invention;

[0069] Figure 8 It is a flow chart of a method for monitoring the uplift of column piles in deep foundation pit excavation according to one embodiment of the present invention. DETAILED DESCRIPTION

[0070] The following is a further detailed description of the monitoring method for the uplift of the deep foundation pit excavation column piles proposed by the present invention in combination with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0071] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0072] In the description of the invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] In the invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to the specific circumstances.

[0075] Please refer to Figures 1 to 8 The method for monitoring the uplift of the deep foundation pit excavation column piles comprises the following steps:

[0076] First, please refer to Figures 1 to 7 , execute step S1, and construct a three-dimensional display diagram of the uplift of the column piles in the foundation pit and the top of the underground continuous wall based on Matlab software.

[0077] Wherein, step S1 includes the following sub-steps:

[0078] S11, please refer to Figure 1 , define the outer boundary of the foundation pit: according to the position and geometric shape of the underground continuous wall in the foundation pit, set the plane coordinates of each corner point, and the closed plane of the underground continuous wall formed by each corner point is defined as the outer boundary of the foundation pit; in S11, the closed plane of the underground continuous wall is represented by a set of continuous coordinate points as follows:

[0079] plane_points={(xi,yi,0)|i=1,2,…,n};where plane_points represents the set of coordinate points of the closed plane, (xi,yi) represents the plane coordinates of each corner point, and n represents the number of corner points of the underground continuous wall. Specifically, the first point is connected to the last point to form a closed loop so as to highlight the outline of the foundation pit in the three-dimensional display.

[0080] S12. Define the column pile uplift measuring points and the underground continuous wall top uplift measuring points, and determine the real-time three-dimensional coordinates of each measuring point:

[0081] According to the project planning or monitoring requirements, M column pile uplift measuring points and N underground continuous wall top uplift measuring points are set;

[0082] According to the position of each measuring point, determine the x-axis coordinate and y-axis coordinate of each measuring point;

[0083] According to the monitoring data of each measuring point provided by the monitoring unit every day, the z-axis coordinate of each measuring point is updated in real time.

[0084] The real-time three-dimensional coordinates of these measuring points serve as the basic data for subsequent interpolation and three-dimensional display, reflecting the uplift status of the column piles and underground continuous walls in the foundation pit.

[0085] S13, please refer to Figure 2 and Figure 3 , data visualization: visualize the real-time three-dimensional coordinates of each measuring point; S13 includes the following sub-steps:

[0086] S131, 3D scatter plot: based on MATLAB's scatter3 function, the real-time 3D coordinates of each measuring point are plotted, so that the real-time 3D coordinates (x, y, z) of each measuring point are displayed in 3D space;

[0087] S132, please refer to Figure 2 and Figure 3 , Color distinction: Different colors are marked on the column pile uplift measuring points and the underground continuous wall top uplift measuring points respectively, so as to identify the positions of different measuring points in three-dimensional space and the corresponding uplift values ​​(i.e. the corresponding z-axis coordinate values) by colors.

[0088] In order to distinguish different types of measuring points (i.e., measuring points of column pile uplift or measuring points of underground continuous wall top uplift), different colors are used; in this embodiment, measuring points of column pile uplift are indicated in red, and measuring points of underground continuous wall uplift are indicated in yellow. By distinguishing by colors, the positions of different measuring points and corresponding uplift values ​​are intuitively displayed.

[0089] S14, foundation pit grid division: based on the foundation pit outer boundary (i.e., the foundation pit outer contour) determined in S11, the grid range is determined and grid division is performed; S14 includes the following sub-steps:

[0090] S141, determining the grid range of the foundation pit area: determining the boundary of the grid based on the minimum x-axis coordinate, the maximum x-axis coordinate, the minimum y-axis coordinate and the maximum y-axis coordinate of the outer boundary of the foundation pit; in S141, determining the boundary of the grid of the foundation pit area is expressed by the following formula:

[0091] min_x=min(plane_points(:,1));

[0092] max_x=max(plane_points(:,1));

[0093] min_y=min(plane_points(:,2));

[0094] max_y=max(plane_points(:,2)).

[0095] These minimum and maximum values ​​determine the grid range within which the grid will be divided.

[0096] S142, dividing the grid according to the set resolution. Specifically, dividing the grid according to the set resolution includes the following steps:

[0097] Set the mesh range to:

[0098] x=linspace(min_x,max_x,grid_size);

[0099] y=linspace(min_y,max_y,grid_size);

[0100] Among them, grid_size represents the generated grid size, that is, the number of grids;

[0101] Based on the meshgrid function, a two-dimensional grid coordinate system is generated:

[0102] [X,Y] = meshgrid(x,y);

[0103] Among them, [X,Y] contains the x-axis coordinate and y-axis coordinate of each grid point in the entire foundation pit area.

[0104] Specifically, a regular grid is divided into two-dimensional planes with uniform spacing. Use the meshgrid function to generate a regular grid, and the spacing of the grid points determines the resolution of the fitted surface. Generally, smaller spacing can provide more detailed results, but it also increases the amount of calculation.

[0105] S15, please refer to Figure 4 , Surface fitting: Use interpolation technology to perform surface fitting on the real-time three-dimensional coordinates of each measuring point determined by S12.

[0106] In order to generate a smooth three-dimensional surface from discrete measurement points, interpolation technology is used for surface fitting. Specifically, a high-order polynomial is constructed through the existing measurement point data (i.e., the real-time three-dimensional coordinates obtained in S12) to accurately fit the data points and ensure smooth transition between interpolation points. This method generates a smooth and continuous distribution surface that is used to describe the uplift distribution of column piles and underground continuous walls on the plane.

[0107] S15 includes the following sub-steps:

[0108] Surface fitting is performed based on the following formula: Among them, λ i (x,y) is the interpolation function, z i is the uplift value of the known measuring point;

[0109] Based on the griddata function, interpolation is performed according to the existing measurement point data, which can be expressed by the following formula: Z = griddata (xdata, ydata, zdata, X, Y, 'cubic').

[0110] For better, please refer to Figure 5 , S15 further includes the following steps:

[0111] In MATLAB, based on the contour function, contour lines are superimposed on the three-dimensional surface after surface fitting to show the different height levels of the uplift; wherein the contour lines are expressed by the following formula: f(x, y) = z0; wherein z0 is a certain height, and the function value is the contour line corresponding to the height.

[0112] S16, please refer to Figure 6 ,Result display: Display the results of surface fitting. Specifically, based on the text function, data annotation is performed on each measurement point in the surface fitting results.

[0113] In order to improve the readability of the graph, especially for some key data points, the present invention provides a data annotation function. Specifically, in MATLAB, a text function is used to add a text label to the position of each measurement point, marking its corresponding height value (i.e., z-axis coordinate).

[0114] Next, step S2 is executed to monitor the uplift of the column piles and the underground continuous wall based on the constructed three-dimensional display image.

[0115] The constructed three-dimensional display diagram can intuitively show the uplift distribution of column piles and underground continuous walls. This method can not only effectively reflect the location and amount of uplift, but also help project managers quickly identify areas with larger and smaller uplifts, providing important guidance and decision-making support for safe construction.

[0116] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0117] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0118] The present invention has the following advantages:

[0119] 1) Integrated display of comprehensive information: The monitoring method of the present invention introduces a three-dimensional display method, which can more comprehensively and intuitively display the uplift of column piles and underground continuous walls, making monitoring more efficient and accurate.

[0120] 2) Quickly identify problem areas: The 3D display can help project managers quickly identify areas with large or abnormal pile uplift, which may pose safety hazards or require special attention. By promptly identifying problems and taking appropriate measures, project risks can be effectively reduced.

[0121] 3) Make up for the lack of fixed monitoring points: Through the surface fitting method, the spatial distribution of the uplift of the column piles in the foundation pit and the uplift of the top of the underground continuous wall is fully displayed, overcoming the problem of incomplete data or blind spots caused by fixed measuring points in traditional monitoring methods, and improving the comprehensiveness and accuracy of monitoring.

[0122] 4) Linkage analysis of column piles and underground continuous walls: The 3D display simultaneously shows the uplift of column piles and underground continuous wall tops in the foundation pit, realizing linkage monitoring and analysis between column piles and underground continuous walls, helping project managers to better understand the mutual influence between the two, and providing more accurate decision-making basis to ensure the overall safety and stability of the foundation pit.

[0123] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for monitoring the uplift of column piles in deep foundation pit excavation, characterized in that: The following steps are involved: S1. Construct a three-dimensional display diagram of the uplift of the column piles in the foundation pit and the top of the underground continuous wall based on Matlab software; S2. Monitor the uplift of column piles and underground continuous walls based on the constructed three-dimensional display image.

2. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 1, characterized in that: Step S1 includes the following sub-steps: S11. Define the outer boundary of the foundation pit: According to the position and geometric shape of the underground continuous wall in the foundation pit, the plane coordinates of each corner point are set, and the closed plane of the underground continuous wall formed by each corner point is defined as the outer boundary of the foundation pit; S12. Define the column pile uplift measuring points and the underground continuous wall top uplift measuring points, and determine the real-time three-dimensional coordinates of each measuring point: According to the project planning or monitoring requirements, M column pile uplift measuring points and N underground continuous wall top uplift measuring points are set; According to the position of each measuring point, determine the x-axis coordinate and y-axis coordinate of each measuring point; According to the monitoring data of each measuring point provided by the monitoring unit every day, the z-axis coordinates of each measuring point are updated in real time; S13, data visualization: visualize the real-time three-dimensional coordinates of each measuring point; S14, foundation pit grid division: determine the grid range based on the outer boundary of the foundation pit determined in S11 and perform grid division; S15, surface fitting: using interpolation technology to perform surface fitting on the real-time three-dimensional coordinates of each measuring point determined by S12; S16. Result display: display the result of surface fitting.

3. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 2, characterized in that: In S11, the closed plane of the underground continuous wall is represented by a set of continuous coordinate points as follows: plane_points={(x i ,y i ,0)∣i=1,2,…,n}; Among them, plane_points represents the coordinate point set of the closed plane, (x i ,y i ) represents the plane coordinates of each corner point, and n represents the number of corner points of the underground continuous wall.

4. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 3, characterized in that: S14 includes the following steps: S141, determining the grid range of the foundation pit area: determining the boundary of the grid based on the minimum x-axis coordinate, the maximum x-axis coordinate, the minimum y-axis coordinate, and the maximum y-axis coordinate of the outer boundary of the foundation pit; S142, dividing the grid according to the set resolution.

5. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 4, characterized in that: In S141, the boundary of the grid of the foundation pit area is determined using the following formula: min_x=min(plane_points(:,1)); max_x=max(plane_points(:,1)); min_y=min(plane_points(:,2)); max_y=max(plane_points(:,2)).

6. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 5, characterized in that: In S142, dividing the grid according to the set resolution includes the following steps: Set the mesh range to: x=linspace(min_x,max_x,grid_size); y=linspace(min_y,max_y,grid_size); Among them, grid_size represents the generated grid size; Based on the meshgrid function, a two-dimensional grid coordinate system is generated: [X,Y] = meshgrid(x,y); Among them, [X,Y] contains the x-axis coordinate and y-axis coordinate of each grid point in the entire foundation pit area.

7. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 2, characterized in that: S13 includes the following steps: S131, 3D scatter plot: based on MATLAB's scatter3 function, the real-time 3D coordinates of each measuring point are plotted, so that the real-time 3D coordinates of each measuring point are displayed in 3D space; S132. Color differentiation: different colors are used to mark the column pile uplift measuring points and the underground continuous wall top uplift measuring points, respectively, so as to identify the positions of different measuring points in three-dimensional space and the corresponding uplift values ​​by colors.

8. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 2, characterized in that: S15 includes the following steps: Surface fitting is performed based on the following formula: Among them, λ i (x,y) is the interpolation function, z i is the uplift value of the known measuring point; Based on the griddata function, interpolation is performed according to the existing measurement point data, which can be expressed by the following formula: Z=griddata(xdata,ydata,zdata,X,Y,'cubic').

9. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 8, characterized in that: S15 further includes the following steps: Based on the contour function, contour lines are superimposed on the three-dimensional surface after surface fitting to show the different height levels of the uplift; wherein the contour lines are expressed by the following formula: f(x,y)=z0; Among them, z0 is a specific height, and the function value is the contour line corresponding to this height.

10. The method for monitoring the uplift of deep foundation pit excavation columns as claimed in claim 2, characterized in that: S16 includes the following steps: Based on the text function, data is annotated for each measurement point in the surface fitting result.

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