Railway yard subgrade model construction method and device based on characteristic line

Abstract

The application discloses a feature line-based railway station yard roadbed model construction method and device, relates to the field of railway engineering technology, and comprises the following steps: arranging a roadbed surface feature line based on railway station yard design information, obtaining feature line arrangement information, and setting additional attribute information of the roadbed surface feature line; determining a target roadbed surface feature line at a target mileage section based on the feature line arrangement information; determining the spatial coordinates of the target roadbed surface feature line based on the additional attribute information of the target roadbed surface feature line and track line information; constructing a roadbed cross section based on the spatial coordinates of feature points and transverse roadbed slope segment data; and constructing a railway station yard roadbed model based on the roadbed cross section. In the manner, the roadbed surface is described by using the feature line, and the additional attribute is set, so that the requirement can be more accurately reflected, the accuracy of the model is ensured, the roadbed cross section design can be automatically completed, the cross section slice materials are provided for constructing the station yard roadbed model, and the model construction efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of railway engineering technology, and in particular to a method and apparatus for constructing railway station subgrade models based on feature lines. Background Technology

[0002] Currently, after completing the design of control feature lines, the subgrade surface model needs to be obtained through continuous adjustments and fitting calculations. This makes it difficult to translate the actual design intent into the final subgrade model, resulting in an inaccurate model. Furthermore, the model lacks sufficient information on subgrade engineering technical parameters, failing to meet the requirements for automatic design and mapping of railway station subgrade cross-sections, thus impacting efficiency.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of this application is to provide a method and apparatus for constructing railway station subgrade models based on feature lines, aiming to solve the technical problems of insufficient accuracy and poor construction efficiency of existing railway station subgrade models.

[0005] To achieve the above objectives, this application provides a method for constructing a railway station subgrade model based on feature lines, the method comprising:

[0006] Based on railway station design information, feature lines of the roadbed surface are arranged to obtain feature line arrangement information, and additional attribute information of the roadbed surface feature lines is set.

[0007] Based on the feature line arrangement information, the target roadbed surface feature lines at the target mileage section are determined.

[0008] Based on the additional attribute information and track information of the target roadbed feature line, the spatial coordinates of the target roadbed feature line are determined.

[0009] Based on the spatial coordinates of the target roadbed surface feature lines and the slope properties, a roadbed cross section is constructed.

[0010] Based on the aforementioned roadbed cross section, a railway station roadbed model is constructed.

[0011] In one embodiment, the types of roadbed surface feature lines include at least ridge lines, shoulders, platforms, and drainage ditches. The step of determining the spatial coordinates of the target roadbed surface feature line based on the additional attribute information and track line information of the target roadbed surface feature line includes:

[0012] Based on the feature line arrangement information, determine the planar coordinates of the target roadbed feature lines;

[0013] Based on the additional attribute information and track line information of the target roadbed surface feature line, the elevation coordinates of the target roadbed surface feature line are determined. The additional attribute information includes at least the associated track, track elevation difference, transverse slope, longitudinal elevation, connection relationship between feature lines, roadbed side slope, roadbed cross slope, roadbed layer filling information, drainage ditch type and shape. The target roadbed surface feature line includes at least the ballast top ditch feature line, platform ditch feature line, track top control feature line, designated feature line and other feature lines.

[0014] The spatial coordinates of the target roadbed feature line are obtained based on the planar coordinates and elevation coordinates of the target roadbed feature line.

[0015] In one embodiment, the track top control feature line is a ballast top ditch feature line, and the step of determining the elevation coordinates of the target roadbed surface feature line based on the additional attribute information of the target roadbed surface feature line and the track line information includes:

[0016] Based on the track line information, determine the number of adjacent tracks to the ballast top trench feature line;

[0017] When the number of adjacent tracks meets the first quantity threshold, the difference between the rail top elevation and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. The difference between the rail top elevation and the elevation difference between the top of the ditch and the rail top is used as the elevation of the ballast top ditch feature line. The elevation coordinates of the ballast top ditch feature line are determined according to the elevation of the ballast top ditch feature line.

[0018] When the number of adjacent tracks meets the second quantity threshold, the minimum value of the difference between the rail top elevation and the height difference between the top of the ditch and the rail top is determined according to the track line information. The minimum value of the difference between the rail top elevation and the height difference between the top of the ditch and the rail top is taken as the elevation of the ballast top ditch feature line. The elevation coordinates of the ballast top ditch feature line are determined according to the elevation of the ballast top ditch feature line.

[0019] In one embodiment, the track top control feature line is a platform ditch feature line, and the step of determining the elevation coordinates of the target roadbed surface feature line based on the additional attribute information of the target roadbed surface feature line and the track line information includes:

[0020] When the platform ditch feature line is located on the left, the difference between the left rail top elevation and the difference between the top of the ditch and the rail top elevation is determined according to the track line information. The difference between the left rail top elevation and the difference between the top of the ditch and the rail top elevation is taken as the elevation of the platform ditch feature line. The elevation coordinates of the platform ditch feature line are determined according to the elevation of the platform ditch feature line.

[0021] When the platform ditch feature line is located on the right, the difference between the rail top elevation on the right and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. The difference between the rail top elevation on the right and the elevation difference between the top of the ditch and the rail top is taken as the elevation of the platform ditch feature line. The elevation coordinates of the platform ditch feature line are determined according to the elevation of the platform ditch feature line.

[0022] In one embodiment, the step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes:

[0023] Based on the track information, determine the track top elevation and the height of the superstructure above the track.

[0024] The elevation of the roadbed surface at the track centerline is determined based on the track top elevation, the height of the track superstructure, and the roadbed cross slope.

[0025] Obtain the first correspondence between the rail top elevation, the height of the track superstructure, the cross slope of the roadbed, the elevation of the roadbed surface at the track centerline, and the elevation of the rail top control feature line;

[0026] Based on the rail top elevation, the height of the track superstructure, the roadbed cross slope, the roadbed surface elevation at the track centerline, and the first correspondence, the elevation of the rail top control feature line is determined, and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

[0027] In one embodiment, the step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes:

[0028] Determine the rail top elevation based on the track information;

[0029] Obtain the second correspondence between the rail top elevation, the preset rail top elevation difference, and the elevation of the rail top control feature line;

[0030] Based on the rail top elevation, the preset rail top elevation difference, and the second correspondence, the elevation of the rail top control feature line is determined, and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

[0031] In one embodiment, the step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes:

[0032] The preset elevation is used as the elevation of the specified feature line, and the elevation coordinates of the specified feature line are determined based on the elevation of the specified feature line.

[0033] In one embodiment, the step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes:

[0034] Obtain the third correspondence between the known slope end elevation, slope length, roadbed cross slope, and the elevations of other characteristic lines;

[0035] Based on the known slope end elevation, slope length, roadbed cross slope, and the third correspondence, determine the elevation of the other feature lines, and based on the elevation of the other feature lines, determine the elevation coordinates of the other feature lines.

[0036] In one embodiment, the step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes:

[0037] Obtain the fourth correspondence between known feature elevations, preset slope elevation differences, and the elevations of other feature lines;

[0038] Based on the known characteristic elevations, the preset slope difference, and the fourth correspondence, the elevations of the other characteristic lines are determined, and the elevation coordinates of the other characteristic lines are determined based on their elevations.

[0039] Furthermore, to achieve the above objectives, this application also proposes a railway station subgrade model construction device based on feature lines, the railway station subgrade model construction device based on feature lines comprising:

[0040] The feature line layout module is used to arrange the feature lines of the roadbed surface based on the railway station design information, obtain the feature line layout information, and set the additional attribute information of the feature lines of the roadbed surface.

[0041] The coordinate calculation module is used to determine the target roadbed surface feature lines at the target mileage section based on the feature line arrangement information.

[0042] The coordinate calculation module is also used to determine the spatial coordinates of the target roadbed feature line based on the additional attribute information and track line information of the target roadbed feature line;

[0043] The model building module is used to construct the roadbed cross section based on the spatial coordinates of the target roadbed surface feature lines and the slope properties.

[0044] The model building module is also used to build a railway station roadbed model based on the roadbed cross section.

[0045] In addition, to achieve the above objectives, this application also proposes a railway station subgrade model construction device based on feature lines. The railway station subgrade model construction device based on feature lines includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the railway station subgrade model construction method based on feature lines as described above.

[0046] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the railway station subgrade model construction method based on feature lines as described above.

[0047] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the railway station subgrade model construction method based on feature lines as described above.

[0048] This application provides a method for constructing a railway station subgrade model based on feature lines. Based on railway station design information, feature lines of the subgrade surface are arranged to obtain feature line arrangement information, and additional attribute information of the subgrade surface feature lines is set. Based on the feature line arrangement information, the target subgrade surface feature line at the target mileage section is determined. Based on the additional attribute information of the target subgrade surface feature line and track line information, the spatial coordinates of the target subgrade surface feature line are determined. Based on the spatial coordinates of feature points and transverse subgrade slope segment data, a subgrade cross-section is constructed. Based on the subgrade cross-section, a railway station subgrade model is constructed. This application uses feature lines to describe the subgrade surface and sets additional attributes, more accurately reflecting the requirements and ensuring the accuracy of the railway station subgrade model. Furthermore, after defining the position, elevation, slope, and other attributes of the feature lines, the final subgrade model can be obtained without adjusting the fitting, improving model accuracy and construction efficiency, and thus improving engineering efficiency. This solves the technical problems of insufficient accuracy and poor construction efficiency in railway station subgrade models. Attached Figure Description

[0049] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart illustrating an embodiment of the railway station subgrade model construction method based on feature lines in this application.

[0052] Figure 2 A schematic diagram of a two-platform, four-track railway station using the feature-line-based subgrade model construction method provided in Embodiment 1 of this application;

[0053] Figure 3 A schematic diagram of the shoulder attributes of the railway station subgrade model construction method based on feature lines provided in Embodiment 1 of this application;

[0054] Figure 4 A schematic diagram of the inner embankment properties of the railway station subgrade model construction method based on feature lines provided in Embodiment 1 of this application;

[0055] Figure 5 A schematic diagram of slope properties for the railway station subgrade model construction method based on feature lines provided in Embodiment 1 of this application;

[0056] Figure 6 A schematic diagram illustrating the method of calculating the cross slope of the railway station subgrade model based on feature lines provided in Embodiment 1 of this application;

[0057] Figure 7 A schematic diagram illustrating the method for calculating the difference in elevation from the track to the rail top in the railway subgrade model construction method based on feature lines provided in Embodiment 1 of this application;

[0058] Figure 8 A schematic diagram illustrating the method of constructing a railway station subgrade model based on feature lines, provided in Embodiment 1 of this application, using the cross slope of the slope and the elevation at the other end for calculation.

[0059] Figure 9 A schematic diagram illustrating the method of estimating the elevation from the other side of the feature line in the railway station subgrade model construction method based on feature lines provided in Embodiment 1 of this application;

[0060] Figure 10 This is a schematic diagram of the modular structure of the railway station subgrade model construction device based on feature lines according to an embodiment of this application;

[0061] Figure 11 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the railway station subgrade model construction method based on feature lines in the embodiments of this application.

[0062] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0063] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0064] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0065] The main solution of this application embodiment is as follows: Based on railway station design information, the feature lines of the roadbed surface are arranged to obtain feature line arrangement information, and additional attribute information of the roadbed surface feature lines is set; based on the feature line arrangement information, the target roadbed surface feature line at the target mileage section is determined; based on the additional attribute information of the target roadbed surface feature line and track line information, the spatial coordinates of the target roadbed surface feature line are determined; based on the spatial coordinates of the feature points and the transverse roadbed slope segment data, a roadbed cross section is constructed; based on the roadbed cross section, a railway station roadbed model is constructed.

[0066] Currently, after completing the design of control feature lines, the subgrade surface model needs to be obtained through continuous adjustments and fitting calculations. This makes it difficult to translate the actual design intent into the final subgrade model, resulting in an inaccurate model. Furthermore, the model lacks sufficient information on subgrade engineering technical parameters, failing to meet the requirements for automatic design and mapping of railway station subgrade cross-sections, thus impacting efficiency.

[0067] This application provides a solution that uses feature lines to describe the roadbed surface and sets additional attributes to more accurately reflect the requirements, ensure the accuracy of the railway station roadbed model, and obtain the final roadbed model without adjusting the fitting after defining the position, elevation, slope and other attributes of the feature lines. This improves the model accuracy and construction efficiency, and improves engineering efficiency, solving the technical problems of insufficient accuracy and poor construction efficiency of railway station roadbed models.

[0068] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a railway station subgrade model construction device based on feature lines. This embodiment does not specifically limit it in this regard. The following uses a railway station subgrade model construction device based on feature lines as an example to describe this embodiment and the following embodiments.

[0069] This application provides a method for constructing a railway station subgrade model based on feature lines, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the railway station subgrade model construction method based on feature lines in this application.

[0070] In this embodiment, the method for constructing a railway station subgrade model based on feature lines includes steps S10 to S50:

[0071] Step S10: Based on the railway station design information, arrange the feature lines of the roadbed surface to obtain the feature line arrangement information, and set the additional attribute information of the feature lines of the roadbed surface.

[0072] It should be noted that the roadbed surface feature lines, also known as the control feature lines of the roadbed surface, are typically polyline lines used to represent the positions of ridge lines, ditches, platforms, and shoulders on the roadbed surface of a station. In this embodiment, the types of roadbed surface feature lines include at least ridge lines, shoulders, platforms, and drainage ditches. Ridge line: A raised section of the roadbed surface, with equal elevations on both sides and slopes on both sides; Shoulder: At the shoulder, only one side has a slope, with additional slope data for the other side; Drainage ditch: At the longitudinal ditches on the roadbed surface, both sides have slopes, and the elevations may differ; Platform: At the platform edge, one side is the roadbed surface, and the other side is the platform, with different elevations on both sides. For example, as shown... Figure 2 As shown, in two four-track stations, elevation, side slopes, shoulders and slope data are added to the plane polyline. The feature lines reflected on the cross section are the feature points. Based on the feature points, the shape of the roadbed surface of any cross section can be determined, thereby establishing a three-dimensional model of the station roadbed surface.

[0073] Additionally, it should be noted that when feature lines are used to represent road shoulders, the attributes of the road shoulder, embankment within the trench, slope, and ditch should be added. (Reference) Figure 3 Shoulder attributes: The main contents include shoulder connection type (including independent slope, slope connection, retaining wall connection, intersection forming a ditch, intersection without a ditch), shoulder material (rubble, concrete), shoulder platform width, and platform cross slope; (Reference) Figure 4 The attributes of the inner dike include: whether an inner dike is set up, the height of the inner dike, the slope of the inner dike, the width of the inner dike platform, and the cross slope of the inner dike platform; the attributes of the slope include: the height and slope of each level of slope, the width and cross slope of the platform, the type of slope protection, the type of slope toe (including counter-pressure type, raised type, toe wall type, none), and the parameters of the guardrail (including the width, cross slope, height, and slope of the guardrail); the attributes of the ditch related to the slope include: the attributes used to describe the side ditch or embankment drainage ditch, including whether an embankment drainage ditch is set up, the distance from the ditch to the slope toe, whether a water-retaining embankment is set up, the distance from the water-retaining embankment to the ditch, whether a top ditch is set up, the distance from the top ditch to the top of the trench, whether a water interception ditch is set up, and the distance from the water interception ditch to the top ditch.

[0074] Understandably, railway station design information refers to relevant design drawings and data that reflect the design intent, such as track alignment diagrams and railway station plan designs. Based on this railway station design information, various feature lines are arranged according to the design intent to obtain the overall feature line layout, i.e., feature line layout information. Each feature line is assigned additional attribute information, which includes at least the associated track, track elevation difference, lateral slope, longitudinal elevation, connection relationship between feature lines, roadbed slope, roadbed cross slope, roadbed layer filling information, drainage ditch type, and shape.

[0075] Step S20: Based on the feature line arrangement information, determine the target roadbed surface feature line at the target mileage section;

[0076] It should be noted that the target mileage section is the specified mileage section, and the target roadbed surface feature lines are all the roadbed surface feature lines in the target mileage section. By extracting all feature lines from the target mileage section, an array of feature line information is obtained.

[0077] Step S30: Determine the spatial coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line;

[0078] It should be noted that track information refers to information related to tracks in railway stations, such as track spacing data and track horizontal and vertical data. Track spacing data usually includes design number, internal number, type, rail top height, yard type, superstructure parameters, etc., and is stored in the track spacing array.

[0079] It is understandable that the spatial coordinates of the target roadbed feature line are determined by the planar coordinates and elevation coordinates of the target roadbed feature line.

[0080] In one feasible implementation, step S30 may include steps S301 to S303:

[0081] It should be noted that the feature line has a slope on at least one side, as shown in the reference. Figure 5The main slope attributes include the surface cross slope of the subgrade, the bottom cross slope of the subgrade, the subgrade filling type, the subgrade side slope, and whether the subgrade is extended. Surface cross slope: When a cross slope rate is specified, the cross slope is defined from left to right, with upward being positive and downward being negative. The slope rate is the quotient of the longitudinal elevation difference and the horizontal length. When no cross slope rate is specified, the slope rate is controlled by the elevations at both ends of the slope. Bottom cross slope: The bottom cross slope rate is generally the same as the surface cross slope, and its definition rules are the same as the surface cross slope rate. Subgrade filling type: Includes main line subgrade, arrival / departure line subgrade, shunting line subgrade, lead-out line subgrade, other station line subgrade, platform subgrade, yard subgrade, and custom subgrade, etc. Subgrade side slope: Includes whether side slopes are set on the left and right sides of the subgrade and the slope rate. Whether the subgrade is extended: Includes whether the left and right sides of the subgrade are extended and the extension width value.

[0082] Step S301: Determine the planar coordinates of the target roadbed surface feature lines based on the feature line arrangement information;

[0083] It should be noted that the planar coordinates of the target roadbed feature lines can be obtained when acquiring the target roadbed feature lines.

[0084] Step S302: Determine the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line;

[0085] It should be noted that different target roadbed surface feature lines require different calculation methods. In this embodiment, the target roadbed surface feature lines include at least the rail top control feature line, the designated feature line, and other feature lines. The rail top control feature line requires the use of track control methods to calculate its elevation, which is derived from the rail top elevation, superstructure elevation, cross slope, etc. The designated feature line is usually set with a specified elevation. Other feature lines are the target roadbed surface feature lines other than the rail top control feature line and the designated feature line.

[0086] First, calculate the elevation coordinates of the ballast top ditch feature line and the platform ditch feature line in the rail top control feature line.

[0087] In one feasible implementation, for a ballast top trench feature line, the number of adjacent tracks is determined based on the track line information; when the number of adjacent tracks meets a first threshold, the difference between the rail top elevation and the elevation difference between the top of the trench and the rail top is determined based on the track line information, and this difference is used as the elevation of the ballast top trench feature line; and the elevation coordinates of the ballast top trench feature line are determined based on the elevation of the ballast top trench feature line; when the number of adjacent tracks meets a second threshold, the minimum value of the difference between the rail top elevation and the elevation difference between the top of the trench and the rail top is determined based on the track line information, and this minimum value is used as the elevation of the ballast top trench feature line; and the elevation coordinates of the ballast top trench feature line are determined based on the elevation of the ballast top trench feature line.

[0088] It should be noted that the ballast top ditch feature line, which is a feature line of type drainage ditch and attributed as ballast top ditch, belongs to the category of ditch feature lines and is a type of track top control feature line. The number of adjacent tracks refers to the number of tracks next to it. The elevation of the ballast top ditch feature line is calculated in two ways, related to the number of adjacent tracks. The first and second quantity thresholds are 1 and 2, respectively.

[0089] Understandably, if the number of adjacent tracks meets the first threshold, it means that the characteristic line of the ballast top ditch has a track on only one side. In this case, the elevation of the characteristic line of the ballast top ditch is the rail top elevation minus the elevation difference between the top of the ditch and the rail top. The elevation difference between the top of the ditch and the rail top is the difference in elevation between the top of the ditch and the top of the rail. If the number of adjacent tracks meets the second threshold, it means that there are tracks on both sides of the characteristic line of the ballast top ditch. In this case, the rail top elevation on both sides is calculated separately, minus the elevation difference between the top of the ditch and the rail top, and the smaller value is taken as the elevation of the characteristic line of the ballast top ditch. The elevation coordinates of the characteristic line of the ballast top ditch can be determined based on its elevation.

[0090] In one feasible implementation, for the platform ditch feature line, when the platform ditch feature line is located on the left, the difference between the rail top elevation on the left and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. This difference is used as the elevation of the platform ditch feature line, and the elevation coordinates of the platform ditch feature line are determined based on its elevation. When the platform ditch feature line is located on the right, the difference between the rail top elevation on the right and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. This difference is used as the elevation of the platform ditch feature line, and the elevation coordinates of the platform ditch feature line are determined based on its elevation.

[0091] It should be noted that the platform ditch feature line, which is a feature line of type drainage ditch and attributed as a platform ditch, belongs to the platform category of feature lines and is a type of rail top control feature line. The elevation of the platform ditch feature line is calculated in two ways, depending on the location of the feature line.

[0092] Understandably, if the platform ditch feature line is on the left, its elevation is the left rail top elevation minus the difference between the ditch top and the rail top elevation; if the platform ditch feature line is on the right, its elevation is the right rail top elevation minus the difference between the ditch top and the rail top elevation. The elevation coordinates of the platform ditch feature line can then be determined based on its elevation.

[0093] Next, calculate the elevation coordinates of the rail top control feature lines, excluding the ballast top ditch feature lines and the platform ditch feature lines, as well as the elevation coordinates of the designated feature lines.

[0094] In one feasible implementation, the track top elevation and the height of the superstructure are determined based on the track line information; the roadbed surface elevation at the track centerline is determined based on the track top elevation, the height of the superstructure, and the roadbed cross slope; a first correspondence is obtained between the track top elevation, the height of the superstructure, the roadbed cross slope, the roadbed surface elevation at the track centerline, and the elevation of the track top control feature line; the elevation of the track top control feature line is determined based on the track top elevation, the height of the superstructure, the roadbed cross slope, the roadbed surface elevation at the track centerline, and the first correspondence; and the elevation coordinates of the track top control feature line are determined based on the elevation of the track top control feature line.

[0095] It should be noted that the method of "calculation based on the track and subgrade cross slope" is adopted. The first correspondence between the rail top elevation, track superstructure height, subgrade cross slope, subgrade surface elevation at the track centerline, and the elevation of the rail top control feature line, i.e., the calculation formula for the elevation of the rail top control feature line, is as follows:

[0096] H = H 轨顶 -H 上建 +L 点距轨中 ×i

[0097] In the formula, H represents the elevation of the rail top control feature line. 轨顶 H represents the elevation of the top of the track. 上建 This indicates the height of the track superstructure (including cross slope correction), where i represents the roadbed cross slope, from left to right, upward is positive and downward is negative, and L... 点距轨中 This represents the length between the offset value at the characteristic line and the offset value at the track centerline. By substituting the relevant data into the first correspondence mentioned above, the elevation of the corresponding track top control characteristic line can be calculated, thus obtaining the elevation coordinates.

[0098] Understandably, once the track elevations near the feature line are determined, the subgrade elevation at the track centerline is calculated using the track top elevation, track superstructure height, and subgrade cross slope. Then, based on the subgrade cross slope, the subgrade elevation at the feature line is calculated. Figure 6 The elevation of point A can be calculated from the rail top elevation and the cross slope of the roadbed.

[0099] In one feasible implementation, the rail top elevation is determined based on the track line information; a second correspondence is obtained between the rail top elevation, the preset rail top elevation difference, and the elevation of the rail top control feature line; the elevation of the rail top control feature line is determined based on the rail top elevation, the preset rail top elevation difference, and the second correspondence; and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

[0100] It should be noted that the method of "calculation based on track and rail top elevation difference" is adopted. The preset rail top elevation difference is the pre-specified elevation difference between the rail top and the rail top; above the rail top is positive, and below the rail top is negative. The second correspondence between the rail top elevation, the preset rail top elevation difference, and the elevation of the rail top control feature line, i.e., the calculation formula for the elevation of the rail top control feature line, is as follows:

[0101] H = H 轨顶 +H 高差

[0102] In the formula, H represents the elevation of the rail top control feature line. 轨顶 H represents the elevation of the top of the track. 高差 This represents the preset rail top elevation difference. By substituting the relevant data into the second correspondence mentioned above, the elevation of the corresponding rail top control feature line can be calculated, thus obtaining the elevation coordinates.

[0103] Understandably, reference Figure 7 Once the elevation of the track adjacent to the feature line is determined, the elevation of the roadbed surface at the feature line can be directly calculated using the specified track top elevation difference.

[0104] In one feasible implementation, a preset elevation is used as the elevation of the designated feature line, and the elevation coordinates of the designated feature line are determined based on the elevation of the designated feature line.

[0105] It should be noted that the "direct elevation specification method" is used. The specified feature line is the feature line for specifying the elevation, and the preset elevation is the specified elevation.

[0106] It is understandable to directly assign an absolute elevation to the feature line. During this process, elevations can be specified for the start and end points of the feature line to accommodate situations with elevation differences.

[0107] Then calculate the elevation coordinates of the other feature lines.

[0108] In one feasible implementation, a third correspondence is obtained between the known slope end elevation, slope length, roadbed cross slope, and the elevations of other feature lines; based on the known slope end elevation, slope length, roadbed cross slope, and the third correspondence, the elevations of the other feature lines are determined, and the elevation coordinates of the other feature lines are determined based on the elevations of the other feature lines.

[0109] It should be noted that the method of "calculation from the cross slope of the slope and the elevation of the other end" is adopted. The known elevation of the slope end refers to the elevation of one end of the slope, which is known. The third correspondence between the known slope end elevation, slope length, roadbed cross slope, and the elevations of other characteristic lines—that is, the calculation formula for the elevations of other characteristic lines—is as follows:

[0110] H = H 另一端 +L 坡面长 ×i

[0111] In the formula, H represents the elevation of other characteristic lines. 另一端 L represents the known elevation of one end of a slope, i.e., the known elevation of the slope end. 坡面长 Let represent the slope length, and ...

[0112] Understandably, reference Figure 8 When the elevation and transverse slope of one end of a slope are known, the elevation of the other end can be directly calculated from the slope length, thereby determining the corresponding elevation coordinates.

[0113] In one feasible implementation, a fourth correspondence is obtained between the known characteristic elevation, the preset slope difference, and the elevations of other characteristic lines; the elevations of the other characteristic lines are determined based on the known characteristic elevation, the preset slope difference, and the fourth correspondence, and the elevation coordinates of the other characteristic lines are determined based on the elevations of the other characteristic lines.

[0114] It should be noted that the method of "calculating from the elevation on the other side of the characteristic line" is adopted. The known characteristic elevation refers to the known elevation of one side of the characteristic line, and the preset slope difference is the pre-defined elevation difference across the slope. The fourth correspondence between the known characteristic elevation, the preset slope difference, and the elevations of other characteristic lines—that is, the calculation formula for the elevations of other characteristic lines—is as follows:

[0115] H = H 另一侧 +H 跨坡高差

[0116] In the formula, H represents the elevation of other characteristic lines. 另一侧 H represents the known elevation of one side of the characteristic line, i.e., the known characteristic elevation. 跨坡高差This indicates the preset elevation difference across the slope. By substituting the relevant data into the fourth correspondence mentioned above, the elevations of the other characteristic lines can be calculated, thus obtaining the elevation coordinates.

[0117] Understandably, reference Figure 9 When the feature line is connected to slopes on both sides and the elevation of one side is known, the elevation of the other side can be calculated by setting the elevation difference, thus realizing the transfer of elevation values ​​across slopes.

[0118] In the specific implementation, the elevation of the characteristic line of the drainage ditch with the attribute of ballast top ditch or platform ditch is calculated first; then the elevation of the slope dividing point controlled or specified by the rail top is calculated, and the elevation of the slope changing point is calculated by three calculation methods: "calculated by the cross slope of the track and roadbed surface", "calculated by the elevation difference from the track to the rail top", and "directly specified elevation", to obtain the three-dimensional coordinates of all characteristic points; then, according to the methods of "calculated by the elevation and cross slope of the other end of the slope", "calculated by the elevation and elevation difference of the other end of the slope", and "calculated by the elevation on the other side of the point and specified elevation difference", the elevation of the remaining slope changing points is calculated repeatedly by using a loop traversal method until all calculations are completed or no new elevation value is calculated.

[0119] Step S303: Obtain the spatial coordinates of the target roadbed feature line based on its planar coordinates and elevation coordinates.

[0120] It is understandable that the spatial coordinates of the target roadbed feature line are determined based on its planar and elevation coordinates.

[0121] Step S40: Construct a roadbed cross section based on the spatial coordinates of the target roadbed surface feature lines and slope attributes;

[0122] It should be noted that the feature lines on the target mileage section are sorted from left to right, and the left and right slope attributes of two adjacent feature lines are determined one by one. If there is information on slope division on both the left and right sides, the slope division data is constructed using the engineering information on the feature points, forming a slope division array. When the descriptions of the roadbed filling thickness, type, etc., of the two slope change points are inconsistent, the higher-level roadbed type is selected.

[0123] Understandably, based on the geometric data and engineering properties of the target roadbed feature lines and slope segment array, the left and right feature lines and slope surface designs of each slope segment are completed one by one, thereby completing the design of the entire cross section.

[0124] Step S50: Based on the roadbed cross section, construct a railway station roadbed model.

[0125] It should be noted that, based on the feature lines and the horizontal and vertical tracks of the entire station, the cross-section design of the entire station is automatically completed according to the target mileage section and displayed in the three-dimensional spatial coordinate system, providing cross-section slice materials for quickly constructing the three-dimensional geometric model of the station roadbed.

[0126] In practical implementation, based on the station's plan design, feature lines such as ridge lines, shoulders, platforms, and drainage ditches are used to continuously describe the roadbed surface outline. Attributes are added to these outlines, recording parameters including associated tracks, elevation differences with tracks, transverse slope, longitudinal elevation, connection relationships between feature lines, roadbed slopes, roadbed cross slopes, information on each layer of roadbed filling, and the type and shape of drainage ditches. Description rules for these added attributes are established, and the spatial coordinates of each feature line are calculated using these rules and the station's track horizontal and vertical data. Using the spatial coordinates of the feature lines, roadbed cross slopes, roadbed layer filling information, roadbed slopes, and connection relationships between slopes, the station's roadbed cross-section design is automatically completed, meeting the production design requirements for cross-section drawings. Based on the feature lines, the entire station's cross-section is automatically designed and displayed in 3D space, providing cross-sectional slice materials for rapidly constructing the station's roadbed model.

[0127] This embodiment provides a method for constructing a railway station subgrade model based on feature lines. Based on railway station design information, feature lines of the subgrade surface are arranged to obtain feature line arrangement information, and additional attribute information of the subgrade surface feature lines is set. Based on the feature line arrangement information, the target subgrade surface feature line at the target mileage section is determined. Based on the additional attribute information of the target subgrade surface feature line and track line information, the spatial coordinates of the target subgrade surface feature line are determined. Based on the spatial coordinates of feature points and transverse subgrade slope segment data, a subgrade cross-section is constructed. Based on the subgrade cross-section, a railway station subgrade model is constructed. Using feature lines to describe the subgrade surface and setting additional attributes more accurately reflects the requirements, ensuring the accuracy of the railway station subgrade model. It can also automatically complete the design of the station subgrade cross-section, providing cross-sectional slice materials for rapid construction of station subgrade models, improving model construction efficiency and engineering efficiency, and solving the technical problems of insufficient accuracy and poor construction efficiency of railway station subgrade models.

[0128] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the railway station subgrade model construction method based on feature lines in this application. Any simple transformations based on this technical concept are within the protection scope of this application.

[0129] This application also provides a railway station subgrade model construction device based on feature lines. Please refer to... Figure 10 The railway station subgrade model construction device based on feature lines includes:

[0130] The feature line layout module 10 is used to arrange the feature lines of the roadbed surface based on the railway station design information, obtain the feature line layout information, and set the additional attribute information of the feature lines of the roadbed surface.

[0131] The coordinate calculation module 20 is used to determine the target roadbed surface feature line at the target mileage section based on the feature line layout information.

[0132] The coordinate calculation module 20 is also used to determine the spatial coordinates of the target roadbed feature line based on the additional attribute information and track line information of the target roadbed feature line.

[0133] The model building module 30 is used to construct the roadbed cross section based on the spatial coordinates of the target roadbed feature lines and the slope attributes.

[0134] The model building module 30 is also used to build a railway station roadbed model based on the roadbed cross section.

[0135] In one feasible implementation, the planar coordinates of the target roadbed surface feature lines are determined based on the feature line arrangement information;

[0136] Based on the additional attribute information and track line information of the target roadbed surface feature line, the elevation coordinates of the target roadbed surface feature line are determined. The additional attribute information includes at least the associated track, track elevation difference, transverse slope, longitudinal elevation, connection relationship between feature lines, roadbed side slope, roadbed cross slope, roadbed layer filling information, drainage ditch type and shape. The target roadbed surface feature line includes at least the ballast top ditch feature line, platform ditch feature line, track top control feature line, designated feature line and other feature lines.

[0137] The spatial coordinates of the target roadbed feature line are obtained based on the planar coordinates and elevation coordinates of the target roadbed feature line.

[0138] In one feasible implementation, the rail top control feature line is the ballast top ditch feature line;

[0139] Based on the track line information, determine the number of adjacent tracks to the ballast top trench feature line;

[0140] When the number of adjacent tracks meets the first quantity threshold, the difference between the rail top elevation and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. The difference between the rail top elevation and the elevation difference between the top of the ditch and the rail top is used as the elevation of the ballast top ditch feature line. The elevation coordinates of the ballast top ditch feature line are determined according to the elevation of the ballast top ditch feature line.

[0141] When the number of adjacent tracks meets the second quantity threshold, the minimum value of the difference between the rail top elevation and the height difference between the top of the ditch and the rail top is determined according to the track line information. The minimum value of the difference between the rail top elevation and the height difference between the top of the ditch and the rail top is taken as the elevation of the ballast top ditch feature line. The elevation coordinates of the ballast top ditch feature line are determined according to the elevation of the ballast top ditch feature line.

[0142] In one feasible implementation, the rail top control feature line is the platform ditch feature line;

[0143] When the platform ditch feature line is located on the left, the difference between the left rail top elevation and the difference between the top of the ditch and the rail top elevation is determined according to the track line information. The difference between the left rail top elevation and the difference between the top of the ditch and the rail top elevation is taken as the elevation of the platform ditch feature line. The elevation coordinates of the platform ditch feature line are determined according to the elevation of the platform ditch feature line.

[0144] When the platform ditch feature line is located on the right, the difference between the rail top elevation on the right and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. The difference between the rail top elevation on the right and the elevation difference between the top of the ditch and the rail top is taken as the elevation of the platform ditch feature line. The elevation coordinates of the platform ditch feature line are determined according to the elevation of the platform ditch feature line.

[0145] In one feasible implementation, the track top elevation and the height of the track superstructure are determined based on the track line information.

[0146] The elevation of the roadbed surface at the track centerline is determined based on the track top elevation, the height of the track superstructure, and the roadbed cross slope.

[0147] Obtain the first correspondence between the rail top elevation, the height of the track superstructure, the cross slope of the roadbed, the elevation of the roadbed surface at the track centerline, and the elevation of the rail top control feature line;

[0148] Based on the rail top elevation, the height of the track superstructure, the roadbed cross slope, the roadbed surface elevation at the track centerline, and the first correspondence, the elevation of the rail top control feature line is determined, and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

[0149] In one feasible implementation, the rail top elevation is determined based on the track information;

[0150] Obtain the second correspondence between the rail top elevation, the preset rail top elevation difference, and the elevation of the rail top control feature line;

[0151] Based on the rail top elevation, the preset rail top elevation difference, and the second correspondence, the elevation of the rail top control feature line is determined, and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

[0152] In one feasible implementation, a preset elevation is used as the elevation of the designated feature line, and the elevation coordinates of the designated feature line are determined based on the elevation of the designated feature line.

[0153] In one feasible implementation, a third correspondence is obtained between the known slope end elevation, slope length, roadbed cross slope, and the elevations of other feature lines.

[0154] Based on the known slope end elevation, slope length, roadbed cross slope, and the third correspondence, determine the elevation of the other feature lines, and based on the elevation of the other feature lines, determine the elevation coordinates of the other feature lines.

[0155] In one feasible implementation, a fourth correspondence is obtained between the known characteristic elevations, the preset slope elevation difference, and the elevations of other characteristic lines;

[0156] Based on the known characteristic elevations, the preset slope difference, and the fourth correspondence, the elevations of the other characteristic lines are determined, and the elevation coordinates of the other characteristic lines are determined based on their elevations.

[0157] The railway station subgrade model construction device based on feature lines provided in this application adopts the railway station subgrade model construction method based on feature lines in the above embodiments, which can solve the technical problems of insufficient accuracy and poor construction efficiency of railway station subgrade models. Compared with the prior art, the beneficial effects of the railway station subgrade model construction device based on feature lines provided in this application are the same as the beneficial effects of the railway station subgrade model construction method based on feature lines provided in the above embodiments, and other technical features in the railway station subgrade model construction device based on feature lines are the same as the features disclosed in the methods of the above embodiments, and will not be repeated here.

[0158] This application provides a railway station subgrade model construction device based on feature lines. The railway station subgrade model construction device based on feature lines includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the railway station subgrade model construction method based on feature lines in the above embodiment 1.

[0159] The following is for reference. Figure 11The diagram illustrates a structural schematic of a feature-line-based railway subgrade model construction device suitable for implementing embodiments of this application. The feature-line-based railway subgrade model construction device in this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 11 The railway station subgrade model construction device based on feature lines shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0160] like Figure 11 As shown, the feature-line-based railway subgrade model building device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the feature-line-based railway subgrade model building device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the feature-line-based railway yard subgrade model building equipment to exchange data wirelessly or via wired communication with other devices. Although the figure shows a feature-line-based railway yard subgrade model building equipment with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented alternatively.

[0161] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0162] The railway station subgrade model construction device based on feature lines provided in this application, employing the railway station subgrade model construction method based on feature lines in the above embodiments, can solve the technical problems of insufficient accuracy and poor construction efficiency of railway station subgrade models. Compared with the prior art, the beneficial effects of the railway station subgrade model construction device based on feature lines provided in this application are the same as those of the railway station subgrade model construction method based on feature lines provided in the above embodiments, and other technical features in this railway station subgrade model construction device based on feature lines are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0163] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0164] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0165] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the railway station subgrade model construction method based on feature lines in the above embodiments.

[0166] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0167] The aforementioned computer-readable storage medium may be included in a feature-line-based railway subgrade model building device; or it may exist independently and not be assembled into the feature-line-based railway subgrade model building device.

[0168] The aforementioned computer-readable storage medium carries one or more programs. When these programs are executed by a feature-line-based railway station subgrade model building device, the feature-line-based railway station subgrade model building device performs the following actions: Based on railway station design information, it arranges subgrade surface feature lines to obtain feature line arrangement information and sets additional attribute information for the subgrade surface feature lines; based on the feature line arrangement information, it determines the target subgrade surface feature line at the target mileage section; based on the additional attribute information and track line information of the target subgrade surface feature line, it determines the spatial coordinates of the target subgrade surface feature line; based on the spatial coordinates of feature points and transverse subgrade slope segment data, it constructs a subgrade cross section; and based on the subgrade cross section, it constructs a railway station subgrade model.

[0169] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0170] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0171] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0172] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described method for constructing railway station subgrade models based on feature lines. This solves the technical problems of insufficient accuracy and poor construction efficiency in railway station subgrade models. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the feature-line-based railway station subgrade model construction method provided in the above embodiments, and will not be elaborated upon here.

[0173] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the railway station subgrade model construction method based on feature lines as described above.

[0174] The computer program product provided in this application can solve the technical problems of insufficient accuracy and poor construction efficiency of railway station subgrade models. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the feature line-based railway station subgrade model construction method provided in the above embodiments, and will not be repeated here.

[0175] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A method for constructing a railway station subgrade model based on feature lines, characterized in that, The method includes: Based on railway station design information, feature lines of the roadbed surface are arranged to obtain feature line arrangement information, and additional attribute information of the roadbed surface feature lines is set. Based on the feature line arrangement information, the target roadbed surface feature lines at the target mileage section are determined. Based on the additional attribute information and track information of the target roadbed feature line, the spatial coordinates of the target roadbed feature line are determined. Based on the spatial coordinates of the target roadbed surface feature lines and the slope properties, a roadbed cross section is constructed. Based on the aforementioned roadbed cross section, a railway station roadbed model is constructed; The types of roadbed surface feature lines include at least ridge lines, shoulders, platforms, and drainage ditches. The step of determining the spatial coordinates of the target roadbed surface feature line based on the additional attribute information and track line information of the target roadbed surface feature line includes: Based on the feature line arrangement information, determine the planar coordinates of the target roadbed feature lines; Based on the additional attribute information and track line information of the target roadbed surface feature lines, the elevation coordinates of the target roadbed surface feature lines are determined. The additional attribute information includes at least the associated track, track elevation difference, transverse slope, longitudinal elevation, connection relationship between feature lines, roadbed side slope, roadbed cross slope, roadbed layer filling information, drainage ditch type and shape. The target roadbed surface feature lines include at least the rail top control feature line, the designated feature line, and other feature lines. The elevation of the rail top control feature line is calculated using the track control method, the elevation of the designated feature line is set using a designated method, and the other feature lines are the target roadbed surface feature lines other than the rail top control feature line and the designated feature line. The spatial coordinates of the target roadbed feature line are obtained based on the planar coordinates and elevation coordinates of the target roadbed feature line.

2. The method as described in claim 1, characterized in that, The track top control feature line is the ballast top ditch feature line. The step of determining the elevation coordinates of the target roadbed surface feature line based on the additional attribute information and track line information of the target roadbed surface feature line includes: Based on the track line information, determine the number of adjacent tracks to the ballast top trench feature line; When the number of adjacent tracks meets the first quantity threshold, the difference between the rail top elevation and the elevation difference between the top of the ditch and the rail top is determined according to the track line information. The difference between the rail top elevation and the elevation difference between the top of the ditch and the rail top is used as the elevation of the ballast top ditch feature line. The elevation coordinates of the ballast top ditch feature line are determined according to the elevation of the ballast top ditch feature line. When the number of adjacent tracks meets the second quantity threshold, the minimum value of the difference between the rail top elevation and the height difference between the top of the ditch and the rail top is determined according to the track line information. The minimum value of the difference between the rail top elevation and the height difference between the top of the ditch and the rail top is taken as the elevation of the ballast top ditch feature line. The elevation coordinates of the ballast top ditch feature line are determined according to the elevation of the ballast top ditch feature line.

3. The method as described in claim 1, characterized in that, The track top control feature line is the platform ditch feature line. The step of determining the elevation coordinates of the target roadbed surface feature line based on the additional attribute information and track line information of the target roadbed surface feature line includes: When the platform ditch feature line is located on the left, the difference between the left rail top elevation and the difference between the top of the ditch and the rail top elevation is determined according to the track line information. The difference between the left rail top elevation and the difference between the top of the ditch and the rail top elevation is taken as the elevation of the platform ditch feature line. The elevation coordinates of the platform ditch feature line are determined according to the elevation of the platform ditch feature line. When the platform ditch feature line is located on the right, the difference between the rail top elevation on the right and the difference between the top of the ditch and the rail top elevation is determined according to the track line information. The difference between the rail top elevation on the right and the difference between the top of the ditch and the rail top elevation is taken as the elevation of the platform ditch feature line, and the elevation coordinates are determined according to the elevation of the platform ditch feature line.

4. The method as described in claim 1, characterized in that, The step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes: Based on the track information, determine the track top elevation and the height of the superstructure above the track. The elevation of the roadbed surface at the track centerline is determined based on the track top elevation, the height of the track superstructure, and the roadbed cross slope. Obtain the first correspondence between the rail top elevation, the height of the track superstructure, the cross slope of the roadbed, the elevation of the roadbed surface at the track centerline, and the elevation of the rail top control feature line; Based on the rail top elevation, the height of the track superstructure, the roadbed cross slope, the roadbed surface elevation at the track centerline, and the first correspondence, the elevation of the rail top control feature line is determined, and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

5. The method as described in claim 1, characterized in that, The step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes: Determine the rail top elevation based on the track information; Obtain the second correspondence between the rail top elevation, the preset rail top elevation difference, and the elevation of the rail top control feature line; Based on the rail top elevation, the preset rail top elevation difference, and the second correspondence, the elevation of the rail top control feature line is determined, and the elevation coordinates of the rail top control feature line are determined based on the elevation of the rail top control feature line.

6. The method as described in claim 1, characterized in that, The step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes: The preset elevation is used as the elevation of the specified feature line, and the elevation coordinates of the specified feature line are determined based on the elevation of the specified feature line.

7. The method as described in claim 1, characterized in that, The step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes: Obtain the third correspondence between the known slope end elevation, slope length, roadbed cross slope, and the elevations of other characteristic lines; Based on the known slope end elevation, slope length, roadbed cross slope, and the third correspondence, determine the elevation of the other feature lines, and based on the elevation of the other feature lines, determine the elevation coordinates of the other feature lines.

8. The method as described in claim 1, characterized in that, The step of determining the elevation coordinates of the target roadbed feature line based on the additional attribute information and track information of the target roadbed feature line includes: Obtain the fourth correspondence between known feature elevations, preset slope elevation differences, and the elevations of other feature lines; Based on the known characteristic elevations, the preset slope difference, and the fourth correspondence, the elevations of the other characteristic lines are determined, and the elevation coordinates of the other characteristic lines are determined based on their elevations.

9. A railway station subgrade model construction device based on feature lines, characterized in that, The method for constructing a railway station subgrade model based on feature lines, as described in any one of claims 1 to 8, comprises the following steps: The feature line layout module is used to arrange the feature lines of the roadbed surface based on the railway station design information, obtain the feature line layout information, and set the additional attribute information of the feature lines of the roadbed surface. The coordinate calculation module is used to determine the target roadbed surface feature lines at the target mileage section based on the feature line arrangement information. The coordinate calculation module is also used to determine the spatial coordinates of the target roadbed feature line based on the additional attribute information and track line information of the target roadbed feature line; The model building module is used to construct the roadbed cross section based on the spatial coordinates of the target roadbed surface feature lines and the slope properties. The model building module is also used to build a railway station roadbed model based on the roadbed cross section.

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