Monitoring Method of Safe Section of Metro Tunnel Structure

Abstract

The present application discloses a method for monitoring the safe section of a subway tunnel structure. The method introduces a vector surface that characterizes the section where the subway tunnel monitoring target is located, so as to facilitate rendering and display on a small-scale map. The small-scale map can reflect the overall monitoring situation of the tunnel structure safety in different sections and at different elevations of the subway line; when an abnormal monitoring result occurs, it will automatically switch to a large-scale map, focusing on displaying the spatial position of the alarm section and the monitoring data and offset of different target positions in the section, so as to facilitate the handling of alarm events, thereby improving the timeliness and accuracy of monitoring and early warning. Through this method, the overall safety monitoring situation of tunnels in different sections of the subway line can be viewed at a glance and the local early warning can be quickly located, which well supports the safe operation and maintenance management of the subway tunnel structure.

Description

Technical Field

[0001] The present application relates to the technical field of underground space structure safety monitoring, and more specifically, to a subway tunnel structure safety section monitoring method. Background Art

[0002] The visual displacement meter is a subway tunnel structure safety monitoring device based on photogrammetry technology, which mainly includes an observation device, a reflective target and general auxiliary materials. The reflective target is usually arranged at the measuring point position of the tunnel section (cross section). The tunnel section generally has 5 measuring points, namely the arch top, the left and right arch waists and the left and right arch feet. A set of monitoring equipment can observe multiple sections. Through a variety of technologies such as optics, photography, image analysis and the Internet of Things, the subtle changes of the preset targets in the picture over time are compared to achieve long-term online measurement of the horizontal displacement and settlement of the measured target.

[0003] The existing subway structure safety monitoring method generally displays the tunnel structure in a three-dimensional visual way by constructing a tunnel BIM model and a monitoring equipment model, and can view the real-time monitoring data and data change curve of the structural deformation of the corresponding measuring point by selecting the monitoring equipment; when constructing a subway underpass tunnel, it is necessary to monitor the upper tunnel and the underpass tunnel at the same time. Due to the large elevation difference and the simultaneous construction of multiple underpass tunnels, the BIM three-dimensional model-based monitoring method cannot intuitively reflect the spatial distribution position and structural safety calculation results of tunnels in different intervals and at different elevations, nor can it intuitively reflect the monitoring data of different monitoring targets on the same section of the tunnel; after the monitoring section and target position are adjusted, the tunnel monitoring BIM model needs to be re-established, which has a large time and economic cost and may cause monitoring omissions. In the safety monitoring and early warning disposal work of subway line operation and maintenance personnel, the display method of early warning results in different tunnel intervals is not intuitive, and the scene needs to be switched back and forth, and the real-time deformation of the early warning section cannot be directly viewed; the monitoring and early warning false alarms caused by subway operation also consume subway monitoring and operation resources to a certain extent. Summary of the invention

[0004] In response to at least one defect or improvement need in the prior art, the present application provides a subway tunnel structure safety section monitoring method for at least achieving a clear overall view of the tunnel safety monitoring status in different sections of the subway line and rapid positioning of local warnings.

[0005] To achieve the above objectives, the present application provides a method for monitoring the safe section of a subway tunnel structure, comprising:

[0006] Construct vector route maps of subway stations and sections;

[0007] According to the mileage value of the monitoring target at the subway tunnel section, the interval vector lines in the vector line map are divided into equal intervals, and combined with the tunnel diameter data, a vector surface representing the section where the subway tunnel monitoring target is located is constructed;

[0008] According to the layout of monitoring target points at the monitoring target position, a tunnel section model is constructed and associated with the subway tunnel section in the continuous space of the subway line;

[0009] Displaying the rendering result based on the vector surface through a small-scale map with a preset first scale parameter to reflect the monitoring results of the subway tunnel structure safety sections in different sections of the subway line;

[0010] If an abnormal monitoring result occurs, it will automatically switch to a large-scale map with a preset second scale parameter, and then be displayed in combination with the tunnel section model to reflect the structural deformation of the subway tunnel section.

[0011] Furthermore, the construction of the vector line map of subway stations and sections includes:

[0012] Bidirectional subway tunnels are managed separately at the city-line-line level;

[0013] Vector lines include stations and sections, and spatial location coordinates and attribute information are managed according to point and line elements in geographic information data;

[0014] For the scene where subway lines intersect at the same location, the coordinate values ​​of the overlapping positions of the overpass tunnel and the underpass tunnel are obtained based on the coordinate and elevation data of different subway lines.

[0015] Furthermore, the vector surface is constructed in the following manner:

[0016] The subway line section vector file is segmented longitudinally based on the preset number of monitoring targets in the section;

[0017] Determine the lateral boundary of the subway tunnel in plane projection according to the tunnel diameter data;

[0018] Based on the aforementioned longitudinal segmentation and transverse boundary determination operations, a rectangular vector surface is constructed which represents the section where each monitoring target position of the subway tunnel is located and is perpendicular to the corresponding section.

[0019] Furthermore, the constructed continuously distributed vector surface is managed according to the surface elements in the geographic information resource;

[0020] Based on the elevation data of the line and the coordinate values ​​of the overlapping positions of the line, the outlines of the surface elements of the subway line crossing the line tunnel and the surface elements of the subway line crossing the line tunnel are displayed in different ways;

[0021] Automatic encoding is performed to achieve correspondence between the vector surface and the monitoring target position at the subway tunnel section.

[0022] Furthermore, the tunnel section model is constructed in the following manner:

[0023] Add monitoring targets and annotation information at the intersection of the preset type of auxiliary lines and the tunnel section to construct the tunnel section model, covering different structural safety monitoring positions of the arch crown, arch spandrel, arch waist and roadbed;

[0024] When the monitoring target positions and monitoring target points at the subway tunnel section are rearranged, the monitoring target positions can be adjusted by setting the association relationship between different vector surfaces and the tunnel section model;

[0025] When the number of monitoring target points changes, the cross-section monitoring points can be adjusted by adjusting the associated tunnel cross-section model.

[0026] Further, constructing a tunnel section model and associating it with the subway tunnel section in the continuous space of the subway line includes:

[0027] For the monitoring scenario of tunnel sections above and below the subway line overlapping space, a point-A tunnel section model is constructed;

[0028] For the tunnel section monitoring scene within the preset distance range from the overlapping space, construct a point b tunnel section model;

[0029] For general tunnel section monitoring scenarios other than the above two scenarios, a c-point tunnel section model is constructed;

[0030] Different types of tunnel section models are associated with vector surfaces where monitoring devices are deployed in the continuous space of subway line tunnels to meet the data correspondence between monitoring targets and section monitoring models;

[0031] Among them, a≥b≥c, and they are all positive integers; each type of tunnel section model includes one or more of the arch crown, arch spandrels on both sides, arch waists on both sides and roadbeds on both sides.

[0032] Furthermore, the rendering result based on the vector surface is displayed on a small-scale map with a preset first scale parameter to reflect the monitoring result of the safe section of the subway tunnel structure in different sections of the subway line, including:

[0033] In the small-scale map, the direction of the subway lines and the intersection of different subway lines are displayed, and the structural safety calculation results of the monitoring sections of the overpass tunnel and the underpass tunnel are rendered in real time in different colors. In combination with the structural changes caused by the operation of subway vehicles in the overpass tunnel, a comprehensive judgment is made to complete the rendering display of different tunnel sections of the subway line based on the vector surface.

[0034] Furthermore, the renderings of different tunnel sections of the subway line include:

[0035] When performing tunnel section rendering based on the vector surface, a normal section of the structure monitoring is rendered in a first color;

[0036] Rendering the sections not associated with the tunnel section model in a second color;

[0037] The abnormal warning section of the structural safety monitoring during the operation of the subway vehicle is rendered in the third color;

[0038] The fourth color rendering represents the abnormal alarm section of the structural safety monitoring when no subway vehicle passes.

[0039] Furthermore, if an abnormal monitoring result occurs, the large-scale map with a preset second scale parameter is automatically switched to, and then displayed in combination with the tunnel section model to reflect the structural deformation of the subway tunnel section, including:

[0040] If an abnormal alarm of structural safety monitoring rendered in the fourth color occurs, the map is automatically switched to the large-scale map, and the monitoring results of the structural safety sections of subway tunnels above and below the subway line overlapping space are displayed preferentially;

[0041] Based on the tunnel section model and the monitoring data of the monitoring target positions, the monitoring data and offset positions of specific monitoring target positions at the subway tunnel section are displayed in real time.

[0042] Furthermore, the method for constructing the tunnel section model also includes:

[0043] Different monitoring target positions are coded sequentially based on the view direction of the visual displacement measuring instrument, with the preset monitoring target as the starting point;

[0044] Based on the coding rules and application scenarios, the calculation rules for horizontal convergence of subway tunnel sections, clearance convergence, lateral height difference of the roadbed and / or differential deposition of deformation joints are determined.

[0045] In general, the above technical solutions conceived by the present application can achieve the following beneficial effects compared with the prior art:

[0046] (1) This application introduces a vector surface that represents the section where the subway tunnel monitoring target is located, so as to facilitate rendering and display on a small-scale map. The small-scale map can reflect the overall monitoring situation of the safety of tunnel structures in different sections and at different elevations of the subway line; when abnormal monitoring results occur, it will automatically switch to a large-scale map, focusing on the spatial position of the alarm section and the monitoring data and offset of different targets in the section, so as to facilitate the handling of alarm events, thereby improving the timeliness and accuracy of monitoring and early warning. Through this method, the overall safety monitoring situation of tunnels in different sections of the subway line can be viewed at a glance and local early warnings can be quickly located, which well supports the safe operation and maintenance management of subway tunnel structures.

[0047] (2) After the tunnel monitoring section and monitoring target points are rearranged, this application can quickly adjust the monitoring section by setting the association between different vector surfaces and the tunnel section model; when the number of monitoring target points in the tunnel section increases or decreases, the associated tunnel section model can also be adjusted to achieve rapid adjustment of the tunnel section monitoring points. In this way, the continuity of monitoring and the convenience of operation and maintenance management can be improved, avoiding possible monitoring omissions.

[0048] (3) This application reduces the false alarm rate of monitoring and early warning caused by subway operation and reduces the consumption of subway operation and maintenance resources by connecting to subway operation data and making comprehensive judgments and rendering by classification and color. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 A core flow chart of a subway tunnel structure safety section monitoring method provided in an embodiment of the present application;

[0051] Figure 2 A schematic diagram of the intersection state of the underpass tunnel and the overpass tunnel at the intersection of subway lines provided in an embodiment of the present application;

[0052] Figure 3 A schematic diagram of forming a vector plane provided in an embodiment of the present application;

[0053] Figure 4 The effect diagram of the subway tunnel cross-section model provided in the embodiment of the present application;

[0054] Figure 5 This is a rendering of the subway tunnel section monitoring data integration provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0056] The terms "first", "second" or "nth" in the specification, claims or drawings of the present application are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" or "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0057] As described in the background technology section of the specification, the existing subway structure safety monitoring method generally displays the tunnel structure in a three-dimensional visual way by constructing a tunnel BIM model and a monitoring equipment model, and can view the real-time monitoring data and data change curve of the structural deformation of the corresponding measuring point by selecting the monitoring equipment; when constructing a subway underpass tunnel, it is necessary to monitor the upper tunnel and the underpass tunnel at the same time. Due to the large elevation difference and the simultaneous construction of multiple underpass tunnels, the traditional BIM three-dimensional model-based monitoring method cannot intuitively reflect the spatial distribution position and structural safety calculation results of tunnels in different intervals and at different elevations, nor can it intuitively reflect the monitoring data of different monitoring targets on the same section of the tunnel; after the monitoring section and target position are adjusted, it is necessary to re-establish the tunnel monitoring BIM model, which has a large time cost and economic cost, and may cause monitoring omissions. In the work of safety monitoring and early warning disposal by subway line operation and maintenance personnel, the display method of early warning results in different tunnel intervals is not intuitive, and scenes need to be switched back and forth, and the real-time deformation of the early warning section cannot be directly viewed; the monitoring and early warning false alarms caused by subway operation also consume subway monitoring and operation resources to a certain extent. In view of this, the present application proposes a subway tunnel structure safety section monitoring method for at least achieving a clear overall view of the safety monitoring status of tunnels in different sections of the subway line and rapid positioning of local warnings.

[0058] refer to Figure 1 An embodiment of the present application provides a method for monitoring the safe section of a subway tunnel structure. The monitoring method may mainly include the following steps.

[0059] Step 1: Construct a vector map of subway stations and sections.

[0060] In some embodiments, specifically, a vector line map of subway stations and sections is drawn, and the mileage values ​​of subway station sites on the vector line map are calculated.

[0061] More specifically, the left and right subway tunnels are managed separately according to the city-line-line level; vector lines include station sites and section lines, and the spatial position coordinates and attribute information are managed according to the point elements and line elements in the geographic information data.

[0062] When facing the scene where subway lines intersect at the same location, the coordinate values ​​of the overlapping positions of the current line tunnel and the underpass tunnel are calculated synchronously according to the coordinate and elevation data of different lines, and the coordinate values ​​of the boundary points of the overlapping space (overlapping in the 3D top view and interlacing in the real world) are recorded, such as Figure 2 shown.

[0063] Step 2: According to the mileage value of the monitoring target at the subway tunnel section, the interval vector lines in the vector line map are divided into equal intervals, and combined with the tunnel diameter data, a vector surface representing the section where the subway tunnel monitoring target is located is constructed.

[0064] In some embodiments, specifically, in order to facilitate the rendering of tunnel sections on small-scale maps, this embodiment represents the tunnel section (i.e., the cross section or transverse section of the tunnel, whose top view is a line segment) in the form of a vector surface (i.e., a virtual rectangle perpendicular to the aforementioned tunnel section, whose top view is a rectangle), such as Figure 3 As shown. First, when the interval vector line is divided at equal distances, the number of tunnel sections or the section spacing B for the target points in the interval is set in combination with the starting mileage and the end mileage of the monitoring section, so as to divide the subway line interval vector file longitudinally; then, according to the tunnel diameter R, the lateral boundary of the subway tunnel in the plane projection is determined, and 0.95B is used as the longitudinal length to construct the vector surface of the section; finally, the section where the monitoring target position of the subway tunnel is located can be expressed by the constructed vector surface.

[0065] The mileage on the left border of the vector surface is the actual mileage of the section. Each vector surface can be selected and rendered individually.

[0066] For the constructed continuous distribution vector surface, it is managed according to the surface elements in the geographic information resources, and the position of the endpoints of the rectangular vector surface is recorded to facilitate the selection of graphics on the map; in the overlapping space of subway lines, the outline of the surface element with lower elevation value at the intersection of the line is drawn with a dotted line in combination with the element elevation attribute, which is convenient for the selection of resource elements. Figure 2 At the same time, automatic encoding can be performed to achieve a one-to-one correspondence between the constructed vector surface and the tunnel section.

[0067] Step 3: According to the layout of the monitoring target points at the monitoring target position, a tunnel section model is constructed and associated with the subway tunnel section in the continuous space of the subway line to meet the monitoring needs of sections in different scenarios.

[0068] The monitoring target position is the location of the monitoring section where the monitoring equipment is deployed, and the monitoring target points are the monitoring points arranged circumferentially on the monitoring section at the monitoring target position. 10*10cm reflective lenses can be deployed at these monitoring points.

[0069] In some embodiments, specifically, the location distribution of monitoring targets on monitoring sections in different subway tunnels is traversed to construct tunnel section models of tunnels with different structures; with the help of equidistant segmentation auxiliary lines or custom auxiliary lines, the annotation information of monitoring targets and number names is added at the intersection of the auxiliary lines and the tunnel sections, covering different structural safety monitoring positions such as the arch crown, arch shoulder (left and right), arch waist (left and right), and roadbed (left, middle and right), which may include 9 monitoring target points, 7 monitoring target points, and 5 monitoring target points, such as Figure 4 shown.

[0070] Furthermore, in order to achieve accurate management of the reflective target points on the tunnel section, different monitoring target positions can be located at the left spandrel (i.e. Figure 4 The target points are sequentially coded starting from the No. ① mark point in the figure; according to the coding rules, existing industry specifications and / or application scenarios, the calculation rules for the horizontal convergence of the subway tunnel section, the clearance convergence, the lateral height difference of the roadbed and / or the differential deposition of deformation joints are determined.

[0071] Furthermore, according to the layout of the cross-section target points, tunnel cross-section models of different vector surfaces in the continuous space of different tunnel lines are set. Among them, the cross-section without the deployment of monitoring targets does not need to be associated with the tunnel cross-section model; for the monitoring scenario of the upper and lower tunnel sections of the overlapping space of the subway line, a 7-point tunnel cross-section model (vault, left and right spandrels, left and right haunches and left and right roadbeds) can be constructed; for the cross-section monitoring within a certain distance near the overlapping space, a 5-point tunnel cross-section model (vault, left and right spandrels and left and right haunches) can be constructed; for the application scenario of general tunnel cross-section monitoring, a 4-point tunnel cross-section model (left and right spandrels and left and right haunches) can be constructed, and different tunnel cross-section models are associated with the vector surface where the monitoring device is deployed in the continuous space of the subway tunnel line, so as to reflect the real-time monitoring data and horizontal / vertical displacement of different target points of the tunnel cross-section through the tunnel cross-section model.

[0072] Furthermore, when the position of the monitoring section in the tunnel is adjusted, the monitoring section can be quickly adjusted by setting the association between different vector surfaces and the tunnel section model; when the number of target points in the monitoring section in the tunnel increases or decreases, the associated tunnel section model can also be adjusted to achieve rapid adjustment of the section monitoring points. In this way, the continuity of monitoring and the convenience of operation and maintenance management can be improved, and possible monitoring omissions can be avoided.

[0073] Step 4: Display the rendering result based on the vector surface through a small-scale map with a preset first scale parameter to reflect the monitoring results of the safe section of the subway tunnel structure in different sections of the subway line.

[0074] In some embodiments, specifically, in a small-scale map, the direction of the city subway lines and the intersection of different subway lines are displayed, and the structural safety calculation results of the current line tunnel and the underpass tunnel monitoring section are rendered in real time in different colors. Combined with the structural changes caused by the operation of subway vehicles in the tunnel above, a comprehensive judgment is made to complete the rendering display of different tunnel sections of the line.

[0075] Furthermore, when rendering the tunnel section, the section with normal structural monitoring can be rendered in green, the section that is not associated with the tunnel section model (i.e., the section without the monitoring device) can be rendered in gray, the section with abnormal structural safety monitoring alarm when the subway vehicle is running can be rendered in yellow, and the section with abnormal structural safety monitoring alarm when no subway vehicle is passing can be rendered in red.

[0076] Step 5: If an abnormal monitoring result occurs, the large-scale map with the preset second scale parameter is automatically switched to, and then displayed in combination with the tunnel section model to reflect the structural deformation of the subway tunnel section.

[0077] In some embodiments, specifically, after a red warning appears, it can automatically switch to a large-scale map, focusing on displaying the tunnel vector surface model of the tunnel above and under the subway line intersection, and rendering the vector surface in the same principle, and based on the tunnel section model and target monitoring data, display the monitoring target points, real-time monitoring data and target point position movement of the warning tunnel section in real time. The effect diagram of subway tunnel section monitoring data integration can be referred to Figure 5 .

[0078] This application reduces the false alarm rate of monitoring and early warning caused by subway operation and reduces the consumption of subway operation and maintenance resources by connecting to subway operation data and making comprehensive judgments and rendering by classification and color.

[0079] This application introduces a vector surface that represents the section where the subway tunnel monitoring target is located, so as to facilitate rendering and display on a small-scale map. The small-scale map can reflect the overall monitoring situation of the safety of tunnel structures in different sections and at different elevations of the subway line; when abnormal monitoring results occur, it will automatically switch to a large-scale map, focusing on the spatial position of the alarm section and the monitoring data and offset of different targets in the section, so as to facilitate the handling of alarm events, thereby improving the timeliness and accuracy of monitoring and early warning. Through this method, the overall safety monitoring situation of tunnels in different sections of the subway line can be viewed at a glance and the local early warning can be quickly located, which well supports the safe operation and maintenance management of subway tunnel structures.

[0080] The flowchart and / or block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and / or computer program product according to various embodiments of the present application. In this regard, each box in the flowchart and / or block diagram can represent a part of a module, program segment or code, and a part of the above-mentioned module, program segment or code includes one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. It should also be noted that each box in the block diagram or flowchart, and the combination of the boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0081] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of the present application may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present application. In particular, without departing from the spirit and teachings of the present application, the technical features described in the various embodiments and / or claims of the present application may be combined and / or combined in a variety of ways, and all of these combinations and / or combinations fall within the scope of the present application.

[0082] Although the present application has been shown and described with reference to specific exemplary embodiments of the present application, it should be understood by those skilled in the art that various changes in form and details may be made to the present application without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents. Therefore, the scope of the present application should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A method for monitoring the safe section of a subway tunnel structure, characterized in that: include: Construct vector route maps of subway stations and sections; According to the mileage value of the monitoring target at the subway tunnel section, the interval vector lines in the vector line map are divided into equal intervals, and combined with the tunnel diameter data, a vector surface representing the section where the subway tunnel monitoring target is located is constructed; According to the layout of monitoring target points at the monitoring target position, a tunnel section model is constructed and associated with the subway tunnel section in the continuous space of the subway line; Displaying the rendering result based on the vector surface through a small-scale map with a preset first scale parameter to reflect the monitoring results of the subway tunnel structure safety sections in different sections of the subway line; If an abnormal monitoring result occurs, it will automatically switch to a large-scale map with a preset second scale parameter, and then be displayed in combination with the tunnel section model to reflect the structural deformation of the subway tunnel section.

2. The subway tunnel structure safety section monitoring method according to claim 1, characterized in that: The construction of the vector line map of subway stations and sections includes: Bidirectional subway tunnels are managed separately at the city-line-line level; Vector lines include stations and sections, and manage spatial location coordinates and attribute information according to point and line elements in geographic information data; For the scene where subway lines intersect at the same location, the coordinate values ​​of the overlapping positions of the overpass tunnel and the underpass tunnel are obtained based on the coordinate and elevation data of different subway lines.

3. The subway tunnel structure safety section monitoring method according to claim 1, characterized in that: The vector surface is constructed in the following manner: The subway line section vector file is segmented longitudinally based on the preset number of monitoring targets in the section; Determine the lateral boundary of the subway tunnel in plane projection according to the tunnel diameter data; Based on the aforementioned longitudinal segmentation and transverse boundary determination operations, a rectangular vector surface is constructed which represents the section where each monitoring target position of the subway tunnel is located and is perpendicular to the corresponding section.

4. The subway tunnel structure safety section monitoring method according to claim 2, characterized in that: The constructed continuously distributed vector surface is managed according to the surface elements in the geographic information resources; Based on the elevation data of the line and the coordinate values ​​of the overlapping positions of the line, the outlines of the surface elements of the subway line crossing the line tunnel and the surface elements of the subway line crossing the line tunnel are displayed in different ways; Automatic encoding is performed to achieve correspondence between the vector surface and the monitoring target position at the subway tunnel section.

5. The subway tunnel structure safety section monitoring method according to claim 1, characterized in that: The tunnel section model is constructed in the following manner: Add monitoring targets and annotation information at the intersection of the preset type of auxiliary lines and the tunnel section to construct the tunnel section model, covering different structural safety monitoring positions of the arch crown, arch spandrel, arch waist and roadbed; When the monitoring target positions and monitoring target points at the subway tunnel section are rearranged, the monitoring target positions can be adjusted by setting the association relationship between different vector surfaces and the tunnel section model; When the number of monitoring target points changes, the cross-section monitoring points can be adjusted by adjusting the associated tunnel cross-section model.

6. The subway tunnel structure safety section monitoring method according to claim 5, characterized in that: Constructing the tunnel section model and associating it with the subway tunnel section in the continuous space of the subway line includes: For the monitoring scenario of tunnel sections above and below the subway line overlapping space, a point-A tunnel section model is constructed; For the tunnel section monitoring scene within the preset distance range from the overlapping space, construct a point b tunnel section model; For general tunnel section monitoring scenarios other than the above two scenarios, a c-point tunnel section model is constructed; Different types of tunnel section models are associated with vector surfaces where monitoring devices are deployed in the continuous space of subway line tunnels to meet the data correspondence between monitoring targets and section monitoring models; Among them, a≥b≥c, and they are all positive integers; each type of tunnel section model includes one or more of the arch crown, arch spandrels on both sides, arch waists on both sides and roadbeds on both sides.

7. The subway tunnel structure safety section monitoring method according to claim 1, characterized in that: The small-scale map display based on the rendering result of the vector surface by presetting the first scale parameter to reflect the monitoring results of the subway tunnel structure safety section in different sections of the subway line includes: In the small-scale map, the direction of the subway lines and the intersection of different subway lines are displayed, and the structural safety calculation results of the monitoring sections of the overpass tunnel and the underpass tunnel are rendered in real time in different colors. In combination with the structural changes caused by the operation of subway vehicles in the overpass tunnel, a comprehensive judgment is made to complete the rendering display of different tunnel sections of the subway line based on the vector surface.

8. The subway tunnel structure safety section monitoring method according to claim 7, characterized in that: Renderings of different tunnel sections of the metro line include: When performing tunnel section rendering based on the vector surface, a normal section of the structure monitoring is rendered in a first color; Rendering the sections not associated with the tunnel section model in a second color; The abnormal warning section of the structural safety monitoring during the operation of the subway vehicle is rendered in the third color; The fourth color rendering represents the abnormal alarm section of the structural safety monitoring when no subway vehicle passes.

9. The subway tunnel structure safety section monitoring method according to claim 8, characterized in that: If an abnormal monitoring result occurs, the large-scale map with the preset second scale parameter is automatically switched to, and then displayed in combination with the tunnel section model to reflect the structural deformation of the subway tunnel section, including: If an abnormal alarm of structural safety monitoring rendered in the fourth color occurs, the map is automatically switched to the large-scale map, and the monitoring results of the structural safety sections of subway tunnels above and below the subway line overlapping space are displayed preferentially; Based on the tunnel section model and the monitoring data of the monitoring target positions, the monitoring data and offset positions of specific monitoring target positions at the subway tunnel section are displayed in real time.

10. The subway tunnel structure safety section monitoring method according to claim 5, characterized in that: The method for constructing the tunnel section model also includes: Different monitoring target positions are coded sequentially based on the view direction of the visual displacement measuring instrument, with the preset monitoring target as the starting point; Based on the coding rules and application scenarios, the calculation rules for horizontal convergence of subway tunnel sections, clearance convergence, lateral height difference of the roadbed and / or differential deposition of deformation joints are determined.

Images