An intelligent generation system for urban rail track basic information model

Abstract

The present invention provides an intelligent generation system for urban rail track basic information models, which pre-builds a station roadbed model and an interval roadbed model that do not include drainage ditches; for the station roadbed model, a station roadbed deepening model is formed by widening and deepening the roadbed limit and processing the drainage details; for the interval roadbed model, a section roadbed deepening model is formed by processing the transverse drainage ditches and the longitudinal drainage ditches of the roadbed in detail; the present invention realizes BIM modeling of mainline tracks, especially covering interval and station track models, filling the gap in BIM application of urban rail tracks, greatly improving the accuracy and modeling efficiency of BIM models of urban rail tracks, and lowering the threshold for BIM application of urban rail tracks.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to an intelligent generation system for a basic information model of an urban rail track. Background Art

[0002] With the development of urban rail transit and the popularization of building information technology, the breadth and depth of BIM application in urban rail transit station construction projects have been continuously improved. In contrast, the application of BIM technology in the rail area is still lacking, especially in the rail profession, which is the basis for the design and construction of the rail area. The positioning of various professional pipelines and equipment in the rail area is based on the top surface of the rail. In order to carry out BIM application in the design, construction, and operation and maintenance of the rail area, the premise is to create a complete and accurate rail BIM model. Limited by factors such as its own strip engineering, complex component geometry data, and software maturity, urban rail BIM has never had a complete, mature, and efficient modeling system.

[0003] The main modeling methods adopted in the research results that have been made public at this stage are summarized as follows: (1) By constructing a parametric contour and laying out along the three-dimensional center line, the rail and roadbed model is constructed (authorization announcement number CN 111581687 B A modeling method system and storage medium for a subway section building information model); (2) The roadbed cross-sectional form changes are controlled by multiple sets of adaptive points, and the roadbed model is constructed by laying out and fusion (application publication number CN 116561859 A Modeling method for roads, bridges, and tunnels based on Revit).

[0004] The above methods have the following main shortcomings: (1) They are only applicable to the creation of roadbed models with fixed interval limits and relatively regular roadbed boundaries, and cannot solve the irregularity of roadbed boundaries caused by the variability of the side walls under the station platform slabs and the station side walls; (2) The drainage ditch section is regarded as part of the roadbed section through parameterized contours or adaptive points, and the problem that the transverse drainage ditch may have a reverse slope and the slope change of the longitudinal drainage ditch may be inconsistent with the longitudinal slope of the roadbed is not considered. In particular, it cannot solve the variability of the station roadbed ditch. These shortcomings lead to low model accuracy, unrealistic, and unable to meet the design, construction, and operation and maintenance requirements.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent generation system for urban rail track basic information model in view of the deficiencies in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A first aspect provides an intelligent generation system for a track bed model of an urban rail station, comprising:

[0009] A component library, wherein the component library includes a parametric model, wherein the parametric model includes at least a station roadbed section profile family with adjustable size and superelevation parameters, wherein the station roadbed section profile family includes a plurality of station roadbed section profiles that do not include a drainage ditch section form;

[0010] 3D centerline creation module, used to create 3D centerline of station lines based on station construction design drawings;

[0011] The parameterized odometer creation module is used to calculate the starting and ending mileage coordinates of the station track bed, create the track bed odometer, and set the station line feature point coordinates and station track bed height parameters in the odometer;

[0012] The station roadbed intelligent modeling function module is used to create a preliminary model of the station roadbed based on the three-dimensional center line of the station line, the roadbed odometer, the pre-set station roadbed width and the station roadbed section profile family, where the pre-set station roadbed width is absolutely greater than the width value of the ordinary station roadbed;

[0013] The station trackbed model limit widening and deepening function module is used to draw the side wall edge lines under the platform slab and the station side wall edge lines; construct the three-dimensional surface of the track top based on the three-dimensional center line of the station line and the coordinates of the feature points in the trackbed odometer; project the side wall edge lines onto the three-dimensional surface of the track top to construct the three-dimensional edge lines; construct geometric shapes based on the side wall edge lines and the corresponding three-dimensional edge lines, perform Boolean intersection operations on the geometric shapes and the preliminary model of the station trackbed, and obtain the station trackbed limit widening model.

[0014] Furthermore, the urban rail station track bed model intelligent generation system also includes a station track bed drainage ditch deepening module, and the station track bed drainage ditch deepening module includes:

[0015] The first drawing and marking module is used to draw the edge line of the roadbed drainage ditch and mark the depth of the drainage ditch in different areas;

[0016] The ditch bottom three-dimensional surface construction module is used to construct the ditch bottom three-dimensional surface based on the station line three-dimensional center line, the coordinates of the element points in the roadbed odometer, the station drainage ditch setting range and slope change points, the drainage ditch edge line and depth annotation; wherein, the parameterized odometer creation module sets the line element point coordinates and the station roadbed height parameters in the roadbed odometer, and also sets the station drainage ditch setting range and slope change points;

[0017] The first three-dimensional edge line construction module is used to project the drainage ditch edge line onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the ditch bottom to construct the three-dimensional edge line of the drainage ditch;

[0018] The first difference operation module is used to construct the drainage ditch geometry based on the three-dimensional edge line of the drainage ditch, perform Boolean difference operation on the drainage ditch geometry and the station roadbed limit widening model, and construct the station roadbed drainage ditch deepening model.

[0019] Furthermore, the urban rail station track bed model intelligent generation system also includes a station track bed water collection pit deepening module, and the station track bed water collection pit deepening module includes:

[0020] The second drawing and marking module is used to draw the edge of the sump and mark the depth of the sump in different areas;

[0021] The pit bottom 3D surface construction module is used to construct the pit bottom 3D surface according to the sump edge line and depth annotation;

[0022] The second three-dimensional edge construction module is used to project the edge of the sump onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the pit bottom to construct the three-dimensional edge of the sump;

[0023] The second difference operation module is used to construct the geometric shape of the sump based on the three-dimensional edge of the sump, perform Boolean difference operation on the geometric shape of the sump and the station roadbed limit widening model, and construct the station roadbed sump deepening model.

[0024] A second aspect provides an intelligent generation system for an urban rail track basic information model, including:

[0025] A component library, wherein the component library includes parameterized models, wherein the parameterized models include at least a station roadbed section profile family, an interval roadbed section profile family, a rail section profile family, and an auxiliary component model, wherein the station roadbed section profile family includes a plurality of station roadbed section profiles that do not include a drainage ditch section form, and the interval roadbed section profile family includes a plurality of interval roadbed section profiles that do not include a drainage ditch section form;

[0026] 3D centerline creation module, used to create the 3D centerline of the line based on the construction design drawing;

[0027] The parameterized odometer creation module is used to calculate the starting and ending mileage coordinates of rails and ballasts, create rail and ballast odometers, and set the coordinates of line element points, ballast dimensions, and auxiliary component parameters in the odometer;

[0028] The station roadbed intelligent modeling function module is used to create a preliminary model of the station roadbed based on the three-dimensional center line of the line, the roadbed odometer, the pre-set station roadbed width and the station roadbed section profile family, where the pre-set station roadbed width is absolutely greater than the width value of the ordinary station roadbed;

[0029] The intelligent modeling function module of the track bed is used to create a preliminary model of the track bed based on the three-dimensional center line of the line, the track bed odometer and the track bed section profile family;

[0030] The station track bed model limit widening and deepening function module is used to draw the side wall edge line under the platform plate and the station side wall edge line; construct the three-dimensional surface of the track top based on the three-dimensional center line of the line and the coordinates of the element points in the odometer; project the side wall edge line onto the three-dimensional surface of the track top to construct the three-dimensional edge line; construct a geometric shape based on the side wall edge line and the corresponding three-dimensional edge line, perform Boolean intersection operation on the geometric shape and the preliminary model of the station track bed, and obtain the station track bed limit widening model;

[0031] Rail intelligent modeling function module, used to create rail models based on the line 3D centerline, rail odometer and rail section profile family;

[0032] The accessory component deepening function module is used to realize the spatial three-dimensional local positioning of the accessory component model based on the accessory component parameter settings in the odometer;

[0033] The coding and attribute adding function module is used to add attribute information to the rail model, track bed model and auxiliary components.

[0034] Furthermore, the intelligent generation system of the urban rail track basic information model also includes a station roadbed drainage deepening module and an interval roadbed drainage deepening module, wherein the station roadbed drainage deepening module includes a station roadbed drainage ditch deepening module, and the station roadbed drainage ditch deepening module is used to perform detailed deepening processing on the drainage ditch of the station roadbed preliminary model based on the station drainage ditch setting range and the slope change point;

[0035] The interval roadbed drainage deepening module also includes an interval roadbed model deepening function module I and an interval roadbed model deepening function module II. The interval roadbed model deepening function module I is used to perform detailed deepening processing on the transverse drainage ditch of the interval roadbed preliminary model based on the location of the interval transverse drainage ditch and the sump; the interval roadbed model deepening function module II is used to perform detailed deepening processing on the longitudinal drainage ditch of the interval roadbed preliminary model based on the setting range of the interval longitudinal drainage ditch and the slope change point;

[0036] Among them, the parameterized odometer creation module sets the coordinates of the line element points, the roadbed dimensions and the parameters of the auxiliary components in the odometer, and also sets the station drainage ditch setting range and slope change points, the section transverse drainage ditch and sump positioning, and the section longitudinal drainage ditch setting range and slope change points.

[0037] Furthermore, the section track bed model deepening function module I includes:

[0038] A transverse drainage ditch cross-section profile family, wherein the drainage ditch cross-section profile family includes a first transverse drainage ditch cross-section profile and a second transverse drainage ditch cross-section profile, the size and the superelevation of the ditch top surface of which are adjustable; the transverse drainage ditch slope corresponding to the first transverse drainage ditch cross-section profile is consistent with the superelevation slope of the ballast bed; the transverse drainage ditch slope corresponding to the second transverse drainage ditch cross-section profile is opposite to the superelevation slope of the ballast bed;

[0039] The superelevation calculation module of the transverse drainage ditch is used to calculate the superelevation at the transverse drainage ditch according to the relative position relationship between the transverse drainage ditch position setting in the roadbed odometer and the coordinates of the feature point;

[0040] A drainage ditch cross-section profile selection module is used to determine whether the transverse drainage ditch slope is consistent with the roadbed superelevation slope according to the transverse drainage ditch position setting in the roadbed odometer and the roadbed superelevation direction, and select the first transverse drainage ditch cross-section profile when they are consistent, and select the second transverse drainage ditch cross-section profile when they are inconsistent;

[0041] The contour placement module is used to place the selected gutter section contour at the start and end points and associated feature points along the three-dimensional center line of the clipped route, and set the size parameters accordingly; if the selected gutter section contour is the first transverse gutter section contour, the gutter top surface superelevation also needs to be set;

[0042] The drainage ditch layout module is used to layout the cross-sectional contour of the transverse drainage ditch along the three-dimensional center line of the clipped line, clip the layout result according to the transverse drainage ditch position setting and the ditch width setting to obtain the transverse drainage ditch geometry, and perform Boolean difference operation on the transverse drainage ditch geometry and the preliminary model of the roadbed to obtain the deepening model of the roadbed transverse drainage ditch.

[0043] Furthermore, the section trackbed model deepening function module II includes:

[0044] A family of longitudinal drainage ditch cross-section profiles, wherein the family of drainage ditch cross-section profiles includes longitudinal drainage ditch cross-section profiles with adjustable size, ditch depth and superelevation;

[0045] The longitudinal drainage ditch superelevation calculation module is used to calculate the ditch depth at the starting and ending points, the associated element points and the superelevation at the longitudinal drainage ditch slope change point according to the relative position relationship between the starting and ending points, the associated element points and the longitudinal drainage ditch slope change point in the ballast odometer after the trimming of the three-dimensional center line of the line;

[0046] The contour placement module is used to place the longitudinal drainage ditch section contour at the start and end points, associated feature points, and associated slope change points along the three-dimensional center line of the cut line, and to set the longitudinal drainage ditch section contour size, ditch depth, and superelevation accordingly;

[0047] The drainage ditch layout module is used to layout the cross-sectional contour of the longitudinal drainage ditch along the three-dimensional center line of the cropped line, and to perform Boolean difference operation on the layout result and the preliminary model of the ballast bed to obtain the deepening model of the longitudinal drainage ditch of the ballast bed.

[0048] Furthermore, the urban rail track basic information model intelligent generation system also includes a station roadbed sump deepening module.

[0049] Furthermore, the station track bed intelligent modeling function module includes:

[0050] The station track bed laying direction judgment module links the three-dimensional center line of the line, calculates the starting point coordinates and the end point coordinates of the station line in the three-dimensional center line of the line, and judges the station track bed laying direction according to the starting point coordinates and the end point coordinates;

[0051] The station track bed superelevation direction judgment module clips the three-dimensional center line of the line based on the starting point coordinates and the end point coordinates of the station line to obtain the three-dimensional center line of the station line; calculates the projection coordinates of the starting point coordinates and the end point coordinates of the three-dimensional center line of the station line on the horizontal plane, and determines the station track bed superelevation setting direction based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane;

[0052] The station track bed superelevation calculation module calculates the superelevation at the start and end points and the element points according to the relative position relationship between the projection coordinates of the start and end points on the horizontal plane and the element point coordinates in the odometer;

[0053] The module for preset station track bed width is used to preset the station track bed width;

[0054] The station track bed contour placement module places the station track bed contour at the start and end points and associated feature points along the three-dimensional center line of the station line, and sets the track bed size and superelevation according to the parameter settings in the track bed odometer, the calculation results of the track bed superelevation setting module and the track bed superelevation calculation module, and the preset station track bed width;

[0055] The station roadbed contour lofting module is used to loft the station roadbed contour along the three-dimensional center line of the station line and create a preliminary model of the station roadbed.

[0056] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically,

[0057] 1. The present invention designs a station roadbed intelligent modeling function module and a station roadbed model limit widening and deepening function module in view of the variability of the lower side wall of the station platform and the station side wall. The station roadbed intelligent modeling function module is used to construct a preliminary model of the station roadbed whose width is absolutely greater than the general roadbed width, laying a foundation for the subsequent roadbed limit widening processing; when the station roadbed model limit widening and deepening function module is working, the lower side wall edge line of the platform and the station side wall edge line are first drawn; based on the three-dimensional center line of the station line and the coordinates of the element points in the roadbed odometer, a three-dimensional surface of the rail top is constructed; the side wall edge line is projected onto the three-dimensional surface of the rail top to construct a three-dimensional edge line; a geometric shape is constructed based on the side wall edge line and the corresponding three-dimensional edge line, and a Boolean intersection operation is performed on the geometric shape and the preliminary model of the station roadbed to realize the station roadbed limit widening and deepening;

[0058] Since the width of the track bed of the preliminary model of the station track bed is absolutely greater than the normal width of the general track bed, it is possible to perform correct Boolean operations with the geometric shapes constructed by the side wall edge line in the track bed limit widening and deepening processing step;

[0059] Moreover, the side wall edge line is not a fixed value, but is drawn according to the actual on-site conditions. Therefore, the geometric shape constructed based on the side wall edge line is also a geometric shape that matches the actual on-site conditions. The geometric shape is subjected to Boolean intersection operation with the preliminary model of the station roadbed to form a station roadbed limit widening model that fits the actual station side wall, thereby solving the complexity of station roadbed modeling caused by the variability of the side wall under the station platform slab and the station side wall.

[0060] 2. In view of the variability of the station roadbed ditch, the present invention changes the steps of constructing the drainage ditch geometry together with the station roadbed preliminary model. Instead, the station roadbed preliminary model without drainage ditch is first constructed, and then a station roadbed drainage ditch deepening module is specially designed. The roadbed drainage ditch edge line is drawn according to the actual site conditions and the drainage ditch depths in different areas are marked. In addition, the ditch bottom three-dimensional surface and the drainage ditch three-dimensional edge line are constructed in combination with the station drainage ditch setting range and the slope change point; then the drainage ditch geometry is constructed based on the drainage ditch three-dimensional edge line; the drainage ditch geometry is performed on the drainage ditch geometry and the station roadbed preliminary model without drainage ditch, and the station roadbed drainage ditch deepening model is constructed;

[0061] In this process, since the geometric shape of the drainage ditch is established according to the actual site conditions, the in-depth model of the station roadbed drainage ditch obtained by performing Boolean difference operation between it and the preliminary model of the station roadbed that does not include the drainage ditch also matches the actual site conditions and can adapt to the variability of the station roadbed ditch.

[0062] 3. The present invention also designs a station roadbed sump deepening module. Similarly, a preliminary model of the station roadbed without sump is first constructed, and then a special module for deepening the station roadbed sump is designed. The roadbed sump edgeline is drawn according to the actual on-site situation and the depth of the sump in different areas is marked. In combination, a three-dimensional surface construction module for the pit bottom and a three-dimensional edgeline of the sump are constructed according to the sump edgeline and depth marking; then, a sump geometric shape is constructed based on the sump three-dimensional edgeline; a Boolean difference operation is performed between the sump geometric shape and the preliminary model of the station roadbed without sump, and a station roadbed drainage ditch deepening model is constructed;

[0063] In this process, since the geometric shape of the sump is established according to the actual site conditions, the in-depth model of the station roadbed drainage ditch obtained by performing Boolean difference operation between it and the preliminary model of the station roadbed that does not include the sump also matches the actual site conditions and can adapt to the variability of the station roadbed sump.

[0064] 4. Aiming at the problem that the transverse drainage ditch may have a reverse slope, the present invention designs a section roadbed model deepening function module I, which selects the corresponding transverse drainage ditch cross-section profile according to the transverse drainage ditch position setting in the roadbed odometer and the roadbed superelevation direction, performs profile placement and lofting, and cuts the lofting result according to the transverse drainage ditch position setting and the ditch width setting to obtain the transverse drainage ditch geometric shape, and performs Boolean difference operation on the transverse drainage ditch geometric shape and the roadbed preliminary model to obtain the roadbed transverse drainage ditch deepening model;

[0065] In this process, the superelevation of the lateral drainage ditch is established according to the actual site conditions, and the deepening model of the interval roadbed drainage ditch is obtained by performing Boolean difference operation with the preliminary model of the interval roadbed that does not include the drainage ditch. It also matches the actual site conditions and can adapt to the problem of reverse slope in the lateral drainage ditch.

[0066] 5. Aiming at the problem that the change of the slope of the longitudinal drainage ditch may be inconsistent with the longitudinal slope of the roadbed, the present invention designs a section roadbed model deepening function module II, which calculates the ditch depth at the starting and ending points and the associated element points and the superelevation at the longitudinal drainage ditch slope change point according to the relative position relationship between the starting and ending points of the three-dimensional center line of the clipped line, the associated element points and the longitudinal drainage ditch slope change point in the roadbed odometer, and then performs contour placement and corresponding settings for the longitudinal drainage ditch section contour size, ditch depth and superelevation. Finally, the longitudinal drainage ditch section contour is staked out along the three-dimensional center line of the clipped line, and the stakeout result is subjected to a Boolean difference operation with the preliminary roadbed model to obtain the roadbed longitudinal drainage ditch deepening model;

[0067] In this process, the superelevation of the longitudinal drainage ditch is established according to the actual site conditions, and the deepening model of the interval roadbed drainage ditch is obtained by performing Boolean difference operation with the preliminary model of the section roadbed that does not include the drainage ditch. It also matches the actual site conditions and can solve the problem that the slope change of the longitudinal drainage ditch may be inconsistent with the longitudinal slope of the roadbed.

[0068] 6. The superelevation of the starting and ending points of the three-dimensional centerline is determined based on the relative position relationship of the coordinates of the element points of the three-dimensional centerline, which can solve the situation where the roadbed and rails are laid across element points.

[0069] 7. The present invention realizes BIM modeling of mainline tracks in urban rail BIM projects, especially covers track models of sections and stations, filling the gap in BIM application of urban rail tracks; greatly improves the accuracy and modeling efficiency of BIM models of urban rail tracks, and lowers the threshold for BIM application of urban rail tracks; realizes automatic deepening of ditches in sections and stations, greatly saves manual calculations and modeling labor, and improves model accuracy and accuracy; the provided track bed limit widening and deepening and ditch detail processing are in line with the actual situation on site, improving the practicality of the model; it complies with the track professional design and construction specifications of major design institutes and engineering bureaus, has wide applicability, strong extensibility, and convenient modification, and provides a good BIM information model for subsequent design, construction, and operation and maintenance; the model can achieve LOD400 precision, with attached attribute information, to meet the diverse application needs of design, construction, and operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a principle block diagram of the intelligent generation system of the urban rail station track bed model described in Example 1.

[0071] Figure 2 It is the principle block diagram of the station trackbed intelligent modeling function module.

[0072] Figure 3 It is a principle block diagram of the intelligent generation system of the urban rail station track bed model described in Example 2.

[0073] Figure 4 It is the principle block diagram of the station roadbed drainage ditch deepening module.

[0074] Figure 5 It is a principle block diagram of the intelligent generation system of the urban rail station track bed model described in Example 3.

[0075] Figure 6 It is the principle block diagram of the station trackbed sump deepening module.

[0076] Figure 7 It is a principle block diagram of the urban rail track basic information model intelligent generation system described in Example 4.

[0077] Figure 8It is the principle block diagram of the intelligent modeling function module of the section track bed.

[0078] Fig. 9 It is the principle block diagram of the rail intelligent modeling functional module.

[0079] Fig.10 It is a schematic diagram of coding and attribute addition.

[0080] Fig.11 This is a schematic diagram of the BIM-based rail intelligent operation and maintenance system.

[0081] Fig.12 It is a structural diagram of the urban rail track basic information model intelligent generation system described in Example 4.

[0082] Fig.13 It is the principle block diagram of the deepening function module I of the section trackbed model.

[0083] Fig.14 It is the principle block diagram of the section trackbed model deepening function module II.

[0084] Fig.15 It is a structural diagram of the urban rail track basic information model intelligent generation system described in Example 6. DETAILED DESCRIPTION

[0085] In the actual application of BIM, the first thing to do is to determine the LOD level according to the stage of the project and the purpose of application, and then determine the model precision level by referring to the model precision requirements described in different LOD levels. Among them, LOD400 precision represents a high-precision model, which generally corresponds to the construction, processing, manufacturing and assembly stages, and contains the information required for complete manufacturing, assembly and detailed construction.

[0086] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0087] Example 1

[0088] This embodiment provides an intelligent generation system for urban rail station track bed model. Figure 1 As shown, including:

[0089] A component library, wherein the component library includes parametric models, wherein the parametric models include at least a family of station roadbed section profiles with adjustable size and superelevation, wherein the family of station roadbed section profiles includes several station roadbed section profiles that do not include drainage ditch section forms; specifically, the station roadbed section profiles include general and medium vibration-damping roadbeds, vibration-damping pad floating plate roadbeds, steel spring floating plate roadbeds and other roadbed section profiles.

[0090] It can be understood that setting the size and superelevation of the station roadbed cross-section profile to an adjustable form can meet the design specifications of the rail professional of major design institutes. Major design institutes only need to set the size and superelevation of the station roadbed cross-section profile according to their own needs.

[0091] The 3D centerline creation module is used to create the 3D centerline of the station line based on the station construction design drawing.

[0092] The parameterized odometer creation module is used to calculate the starting and ending mileage coordinates of the station track bed, create the track bed odometer, and set the station line feature point coordinates and station track bed height parameters in the odometer.

[0093] The station roadbed intelligent modeling function module is used to create a preliminary model of the station roadbed based on the three-dimensional center line of the station line, the roadbed odometer, the pre-set station roadbed width and the station roadbed section profile family. The pre-set station roadbed width is absolutely larger than the width value of the ordinary station roadbed.

[0094] In one embodiment, if Figure 2 As shown in the figure, the intelligent modeling function modules of the station track bed include:

[0095] The station track bed laying direction judgment module links the three-dimensional center line of the station line, calculates the starting point coordinates and the end point coordinates of the three-dimensional center line of the station line, and judges the station track bed laying direction according to the starting point coordinates and the end point coordinates.

[0096] The station track superelevation direction judgment module clips the three-dimensional center line of the station line based on the starting point coordinates and the end point coordinates of the station line to obtain the three-dimensional center line of the station line. The projection coordinates of the starting point coordinates and the end point coordinates of the three-dimensional center line of the station line on the horizontal plane are calculated, and the station track superelevation setting direction is determined based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane.

[0097] It can be understood that this step requires reading the track bed odometer first, and clipping the three-dimensional center line of the station line based on the track bed odometer. After clipping, the direction of the station track bed superelevation setting direction is determined by the direction angle between the projection coordinates of the starting point and the end point. Specifically: when the direction angle is 0°, no superelevation is set; when the direction angle is between (0°, 90°), it is considered that the line turns left and the right side superelevation is set for the station track bed; when the direction angle is between (270°, 360°), it is considered that the line turns right and the left side superelevation is set for the station track bed.

[0098] The station track bed superelevation calculation module calculates the superelevation at the start and end points and the element points according to the relative position relationship between the projection coordinates of the start and end points on the horizontal plane and the element point coordinates in the odometer; specifically, according to the track design specifications, there are 11 types of relative position relationships between the start and end points of the three-dimensional centerline and the element point coordinates, as shown in the table below.

[0099] Table 1 Corresponding relationship between the start and end points and the position of the element points and the superelevation

[0100]

[0101] Note: h is the maximum superelevation of the circular curve segment, heightScale and heightScale' represent the ratio of the distance between the starting point or end point to the straight-slow point to the distance between the straight-slow point and the slow-round point, heightScale2 and heightScale2' represent the ratio of the distance between the starting point or end point to the slow-round point to the distance between the slow-round point and the slow-straight point.

[0102] It can be understood that determining the superelevation of the starting and ending points of the station's three-dimensional centerline based on the relative position relationship between the coordinates of the element points of the element points can solve the problem of laying the station roadbed across element points.

[0103] The preset station track bed width module is used to pre-set the station track bed width.

[0104] The station track bed contour placement module places the station track bed contour at the start and end points and associated feature points along the three-dimensional center line of the station line, and sets the track bed size and superelevation according to the parameter settings in the track bed odometer, the calculation results of the track bed superelevation setting module and the track bed superelevation calculation module, and the preset station track bed width;

[0105] The station roadbed contour lofting module is used to loft the station roadbed contour along the three-dimensional center line of the station line and create a preliminary model of the station roadbed.

[0106] It should be noted that for station roadbeds, the traditional roadbed width parameter based on the roadbed odometer is no longer used to set the roadbed contour width. Instead, a width value that is absolutely larger than the normal roadbed is set in advance, thereby constructing an absolutely large station roadbed model, thereby laying the foundation for the subsequent roadbed limit widening process.

[0107] The station trackbed model limit widening and deepening function module is used to draw the side wall edge lines under the platform slab and the station side wall edge lines; construct the three-dimensional surface of the track top based on the three-dimensional center line of the station line and the coordinates of the feature points in the trackbed odometer; project the side wall edge lines onto the three-dimensional surface of the track top to construct the three-dimensional edge lines; construct geometric shapes based on the side wall edge lines and the corresponding three-dimensional edge lines, perform Boolean intersection operations on the geometric shapes and the preliminary model of the station trackbed, and obtain the station trackbed limit widening model.

[0108] The traditional method of constructing the roadbed is to set the roadbed outline size according to the roadbed width and height parameters in the roadbed odometer after placing the roadbed outline, and to stake out the roadbed outline along the three-dimensional centerline of the line to create a roadbed model. Due to the variability of the side walls under the platform slab and the side walls of the station, the traditional method is only suitable for the creation of roadbed models with fixed limits and regular boundaries when modeling the station roadbed.

[0109] In view of the fact that the station roadbed has the side wall under the platform slab and the variability of the station side wall, this embodiment designs a station roadbed intelligent modeling function module and a station roadbed model limit widening and deepening function module. The station roadbed intelligent modeling function module is used to construct a preliminary model of the station roadbed whose width is absolutely greater than the general roadbed width, laying the foundation for the subsequent roadbed limit widening processing; when the station roadbed model limit widening and deepening function module is working, the side wall edge line under the platform slab and the station side wall edge line are first drawn; based on the three-dimensional center line of the station line and the coordinates of the element points in the roadbed odometer, a three-dimensional surface of the rail top is constructed; the side wall edge line is projected onto the three-dimensional surface of the rail top to construct a three-dimensional edge line; a geometric shape is constructed based on the side wall edge line and the corresponding three-dimensional edge line, and a Boolean intersection operation is performed on the geometric shape and the preliminary model of the station roadbed to realize the widening and deepening of the station roadbed limit.

[0110] Since the width of the track bed of the preliminary model of the station track bed is absolutely larger than the normal width of the general track bed, correct Boolean operations can be performed with the geometric shapes constructed by the side wall edge lines in the track bed limit widening and deepening processing steps.

[0111] The geometric shape is constructed by the two-dimensional side wall edge line and its three-dimensional projection of the rail top, that is, the three-dimensional edge line, to ensure that the height of the geometric shape is absolutely higher than the normal height of the general track bed, so that correct Boolean operations can be performed with the preliminary track bed model.

[0112] In particular, in this embodiment, the side wall edge line is not a fixed value, but is drawn according to the actual on-site conditions. Therefore, the geometric shape constructed based on the side wall edge line is also a geometric shape that matches the actual on-site conditions. The geometric shape is subjected to Boolean intersection operation with the preliminary model of the station roadbed to form a station roadbed limit widening model that fits the actual station roadbed side wall, which solves the limitations of the existing roadbed modeling method in the section width change of the lofted model, and realizes that the edge of the roadbed model changes with the side wall edge line, thereby solving the complexity of station roadbed modeling caused by the variability of the side wall under the station platform slab and the station side wall, and improving the precision, accuracy and practicality of the station roadbed model.

[0113] In this process, users only need to draw the side wall edge lines under the platform slab and the side wall edge lines of the station. The remaining steps can be automatically completed, thus greatly saving manual calculations and modeling labor.

[0114] In addition, the station 3D centerline is clipped by the start and end points in the track bed odometer, and the station track bed contour is staked out along the clipped station 3D centerline to create a preliminary model of the station track bed. The station track bed laying length can be freely set according to the actual situation on site, which is suitable for situations where the station track bed laying length is not the design standard length. The station track bed contour is first placed at the start and end points and associated feature points of the clipped station 3D centerline, and the size and superelevation are set accordingly. Then, the station track bed contour is staked out along the clipped station 3D centerline, which can accurately control the superelevation change of the track bed.

[0115] Example 2

[0116] The difference between this embodiment and embodiment 1 is that, for the station roadbed, there is still the characteristic of complexity in setting the drainage ditch, especially the drainage ditch in the turnout area. In view of the variability of the station roadbed ditch, this embodiment designs a station roadbed drainage ditch deepening module, specifically as follows: Figure 3 As shown; after constructing the preliminary model of the station roadbed without drainage ditches in Example 1, the drainage ditches of the station roadbed model are further deepened in detail based on the station roadbed drainage ditch deepening module.

[0117] Specifically, Figure 4 As shown, the station track bed drainage ditch deepening module includes:

[0118] The first drawing and marking module is used to draw the edge line of the roadbed drainage ditch and mark the depth of the drainage ditch in different areas for subsequent detailed processing;

[0119] The ditch bottom three-dimensional surface construction module is used to construct the ditch bottom three-dimensional surface based on the station line three-dimensional center line, the coordinates of the element points in the roadbed odometer, the station drainage ditch setting range and the slope change point, the drainage ditch edge line and the depth mark; wherein, the parameterized odometer creation module sets the line element point coordinates, the station roadbed height and the auxiliary component parameters in the odometer, and also sets the station drainage ditch setting range and the slope change point;

[0120] The first three-dimensional edge line construction module is used to project the drainage ditch edge line onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the ditch bottom to construct the three-dimensional edge line of the drainage ditch;

[0121] The first difference operation module is used to construct the drainage ditch geometry based on the drainage ditch three-dimensional edge line, perform Boolean difference operation on the drainage ditch geometry and the station roadbed limit widening model, and construct the station roadbed drainage ditch deepening model.

[0122] It can be seen that in this embodiment, the drainage ditch geometry is not constructed together with the preliminary model of the station roadbed. Instead, a preliminary model of the station roadbed without the drainage ditch is first constructed, and then the drainage ditch geometry is constructed according to the actual drainage ditch conditions. The drainage ditch geometry is then subjected to a Boolean difference operation with the preliminary model of the station roadbed, thereby finally obtaining a deepened model of the station roadbed drainage ditch.

[0123] Since the geometric shape of the drainage ditch is constructed on-site according to the actual drainage ditch, it is consistent with the actual drainage ditch. The in-depth model of the station roadbed drainage ditch obtained by performing Boolean difference operation between it and the preliminary model of the station roadbed that does not include the drainage ditch also matches the actual drainage ditch situation and can adapt to the variability of the station roadbed ditch.

[0124] Example 3

[0125] The difference between this embodiment and embodiment 1 or embodiment 2 is that: a station track bed sump deepening module is also designed to deepen the sump existing in the station track bed, such as Figure 5 shown.

[0126] Specifically, Figure 6 As shown, the station track bed sump deepening module includes:

[0127] The second drawing and marking module is used to draw the edge of the sump and mark the depth of the sump in different areas;

[0128] The pit bottom 3D surface construction module is used to construct the pit bottom 3D surface according to the sump edge line and depth annotation;

[0129] The second three-dimensional edge construction module is used to project the edge of the sump onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the pit bottom to construct the three-dimensional edge of the sump;

[0130] The second difference operation module is used to construct the geometric shape of the sump based on the three-dimensional edge of the sump, perform Boolean difference operation on the geometric shape of the sump and the station roadbed limit widening model, and construct the station roadbed sump deepening model.

[0131] Similarly, in this embodiment, the geometric shape of the sump is not constructed together with the preliminary model of the station roadbed. Instead, a preliminary model of the station roadbed that does not include the sump is first constructed, and then the geometric shape of the sump is constructed according to the actual sump situation. The Boolean difference operation is performed between the sump geometry and the preliminary model of the station roadbed, so as to finally obtain a deepened model of the station roadbed sump.

[0132] Since the geometric shape of the sump is constructed on-site according to the actual sump, it matches the actual sump. The in-depth model of the station roadbed sump obtained by performing Boolean difference operation between it and the preliminary model of the station roadbed that does not include the sump also matches the actual sump situation and can adapt to the variability of the station roadbed ditch.

[0133] It can be understood that there is no specific order for the construction of the sump and the construction of the drainage ditch. Therefore, in one embodiment, a preliminary model of the station roadbed can be constructed first, and then a deepening model of the station roadbed drainage ditch can be constructed. Finally, the sump geometry can be constructed according to the actual sump situation, and the sump geometry can be Boolean difference operation can be performed between the sump geometry and the preliminary model of the station roadbed, so as to finally obtain the deepening model of the station roadbed sump. In another embodiment, a preliminary model of the station roadbed can be constructed first, and then a deepening model of the station roadbed sump can be constructed according to the actual sump situation, and finally, the drainage ditch geometry can be constructed according to the actual drainage ditch situation, and the drainage ditch geometry can be Boolean difference operation can be performed between the preliminary model of the station roadbed, so as to finally obtain the deepening model of the station roadbed drainage ditch.

[0134] Example 4

[0135] This embodiment provides an intelligent generation system for urban rail track basic information model. Figure 7 As shown, including:

[0136] A component library, wherein the component library includes a parametric model, wherein the parametric model includes at least a station roadbed section profile family, a section roadbed section profile family, a rail section profile family, and an auxiliary component model, wherein the station roadbed section profile family includes several station roadbed section profiles that do not include a drainage ditch section, and the section roadbed section profile family includes several section roadbed section profiles that do not include a drainage ditch section; the rail section profile family includes a 60kg / km rail section profile; the station roadbed section profile and the section roadbed section profile both include general and medium vibration-damping roadbeds, vibration-damping pad floating plate roadbeds, steel spring floating plate roadbeds, and other roadbed section profiles. The auxiliary components include sleeper fasteners, cover plates, inspection tubes, and seismic isolators, etc.

[0137] The three-dimensional centerline creation module is used to create the three-dimensional centerline of the line based on the construction design drawing. It can be understood that the three-dimensional centerline of the line is divided into the three-dimensional centerline of the station line and the three-dimensional centerline of the section line according to the line area.

[0138] The parameterized odometer creation module is used to calculate the start and end mileage coordinates of rails and ballasts, create rail and ballast odometers, and set the line element point coordinates, ballast dimensions, and auxiliary component parameters in the odometer. The auxiliary component parameters include the type and quantity of sleeper fasteners, cover plate dimensions, inspection tube layout, and seismic isolator layout parameters.

[0139] The station roadbed intelligent modeling function module is used to create a preliminary model of the station roadbed based on the three-dimensional center line of the station line, the roadbed odometer, the pre-set station roadbed width and the station roadbed section profile family. The pre-set station roadbed width is absolutely larger than the width value of the ordinary station roadbed.

[0140] In one embodiment, the station track bed intelligent modeling function module is Figure 2 The specific steps include:

[0141] The station track bed laying direction judgment module links the three-dimensional center line of the line, calculates the starting point coordinates and the end point coordinates of the station line in the three-dimensional center line of the line, and judges the station track bed laying direction according to the starting point coordinates and the end point coordinates;

[0142] The station track bed superelevation direction judgment module clips the three-dimensional center line of the line based on the starting point coordinates and the end point coordinates of the station line to obtain the three-dimensional center line of the station line; calculates the projection coordinates of the starting point coordinates and the end point coordinates of the three-dimensional center line of the station line on the horizontal plane, and determines the station track bed superelevation setting direction based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane; it should be noted that the step of determining the station track bed superelevation setting direction refers to Example 1, which will not be repeated here;

[0143] The station track bed superelevation calculation module calculates the superelevation at the start and end points and the element points according to the relative position relationship between the projection coordinates of the start and end coordinates on the horizontal plane and the element point coordinates in the odometer; it should be noted that the steps of determining and calculating the superelevation at the start and end points and the element points refer to Example 1 and will not be repeated here;

[0144] The module for preset station track bed width is used to preset the station track bed width;

[0145] The station track bed contour placement module places the station track bed contour at the start and end points and associated feature points along the three-dimensional center line of the station line, and sets the track bed size and superelevation according to the parameter settings in the track bed odometer, the calculation results of the track bed superelevation setting module and the track bed superelevation calculation module, and the preset station track bed width;

[0146] The station roadbed contour lofting module is used to loft the station roadbed contour along the three-dimensional center line of the station line and create a preliminary model of the station roadbed.

[0147] It can be seen that for the station track bed, the track bed profile width is no longer set by the track bed width parameter in the track bed odometer, but by setting a width value that is absolutely larger than the normal track bed, thus laying the foundation for the subsequent track bed limit widening process. For example, the track bed width is pre-set to 50 meters, which is absolutely larger than the normal track bed width.

[0148] The intelligent modeling function module of the interval track bed is used to create a preliminary model of the interval track bed based on the three-dimensional center line of the interval line, the track bed odometer and the section contour family of the interval track bed.

[0149] In one embodiment, if Figure 8 As shown in the figure, the intelligent modeling function module of the track bed includes:

[0150] The section roadbed laying direction judgment module links the three-dimensional center line of the line, calculates the starting point coordinates and the end point coordinates of the section line in the three-dimensional center line of the line, and judges the section roadbed laying direction according to the starting point coordinates and the end point coordinates;

[0151] The module for judging the superelevation direction of the track bed cuts the three-dimensional center line of the track based on the starting point coordinates and the end point coordinates of the track bed to obtain the three-dimensional center line of the track bed; calculates the projection coordinates of the starting point coordinates and the end point coordinates of the three-dimensional center line of the track bed on the horizontal plane, and judges the setting direction of the superelevation of the track bed based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane;

[0152] The superelevation calculation module of the interval track bed calculates the superelevation at the starting and ending points and the element points according to the relative position relationship between the projection coordinates of the starting and ending points on the horizontal plane and the coordinates of the element points in the odometer, that is, Table 1;

[0153] The section roadbed contour placement module places the section roadbed contour at the starting and ending points and associated feature points along the three-dimensional center line of the section line, and sets the roadbed size and superelevation according to the parameter settings in the roadbed odometer, the calculation results of the roadbed superelevation setting module and the roadbed superelevation calculation module;

[0154] The section roadbed contour lofting module is used to loft the section roadbed contour along the three-dimensional center line of the section line and create a preliminary model of the section roadbed.

[0155] It can be seen that for the interval track bed, the track bed size is still set through the track bed setting module according to the parameter settings in the track bed odometer. The size here includes the track bed profile width and height. That is, the track bed profile width is set through the track bed width parameter in the track bed odometer, and the track bed profile height is set through the track bed height parameter in the track bed odometer.

[0156] The station trackbed model limit widening and deepening function module is used to draw the side wall edge lines under the platform slab and the station side wall edge lines; construct the three-dimensional surface of the track top based on the three-dimensional center line of the station line and the coordinates of the feature points in the trackbed odometer; project the side wall edge lines onto the three-dimensional surface of the track top to construct the three-dimensional edge lines; construct geometric shapes based on the side wall edge lines and the corresponding three-dimensional edge lines, perform Boolean intersection operations on the geometric shapes and the preliminary model of the station trackbed, and obtain the station trackbed limit widening model.

[0157] The rail intelligent modeling function module is used to create rail models based on the three-dimensional center line of the line, the rail odometer and the rail section profile family.

[0158] It should be noted that if Fig. 9 As shown in the figure, the construction logic of the rail intelligent modeling function module is similar to Figure 8 The logic of the intelligent modeling function module of the trackbed in the section shown is the same, including:

[0159] The rail laying direction judgment module is used to link the three-dimensional center line of the line, calculate the starting point coordinates and the end point coordinates of the three-dimensional center line of the line, and judge the rail laying direction according to the starting point coordinates and the end point coordinates;

[0160] The rail superelevation setting module is used to clip the three-dimensional center line of the line based on the starting point coordinates and the end point coordinates of the rail odometer; calculate the projection coordinates of the starting point coordinates and the end point coordinates of the clipped three-dimensional center line of the line on the horizontal plane, and determine the rail superelevation setting direction based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane.

[0161] It can be understood that this module needs to read the rail odometer first and cut the three-dimensional centerline of the line based on the rail odometer. After cutting, the direction angle between the projection coordinates of the start and end points is used to determine the direction of the rail superelevation setting. Specifically: when the direction angle is 0°, no superelevation is set; when the direction angle is between (0°, 90°), it is considered that the line turns left and the rail is set to superelevation on the right; when the direction angle is between (270°, 360°), it is considered that the line turns right and the rail is set to superelevation on the left.

[0162] The rail superelevation calculation module is used to calculate the superelevation at the starting point, the end point and the element point according to the relative position relationship between the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane and the element point coordinates in the rail odometer. Specifically, the calculation of the superelevation can be seen in Table 1.

[0163] It can be understood that determining the superelevation of the starting and ending points of the three-dimensional centerline based on the relative position relationship between the coordinates of the element points of the element points can solve the problem of laying rails across element points.

[0164] The rail setting module is used to place the rail profile at the start and end points and associated feature points along the trimmed three-dimensional center line, and set the rail size and superelevation according to the parameter settings in the rail odometer, the rail superelevation setting direction determined by the rail superelevation setting module, and the superelevation calculated by the rail superelevation calculation module.

[0165] The rail profile lofting module is used to loft the rail profile along the trimmed 3D center line and create a rail model.

[0166] The accessory component deepening function module is used to realize the spatial three-dimensional local positioning of the accessory component model based on the accessory component parameter settings in the odometer. Among them, the accessory components include sleeper fasteners, inspection tubes, vibration isolators, etc.

[0167] The coding and attribute adding function module is used to add attribute information to the rail model, the ballast model and the auxiliary components, and finally complete the ballast construction, such as Fig.10 shown.

[0168] Similarly, this embodiment is the same as the first embodiment, and a station roadbed intelligent modeling function module and a station roadbed model limit widening and deepening function module are designed for the variability of the side wall under the station platform plate and the station side wall. Since the roadbed width of the station roadbed preliminary model constructed by the station roadbed intelligent modeling function module is absolutely greater than the width value of the normal roadbed, it is possible to perform correct Boolean operations with the geometric shape constructed by the side wall edge line in the roadbed limit widening and deepening processing step;

[0169] In the processing steps of the station track bed model limit widening and deepening function module, the side wall edge line is not a fixed value, but is drawn according to the actual site conditions. Therefore, the geometric shape constructed based on the side wall edge line is also a geometric shape that matches the actual site conditions. This geometric shape is subjected to Boolean intersection operation with the station track bed preliminary model to form a station track bed limit widening model that fits the actual station track bed side wall, thereby solving the complexity of station track bed modeling caused by the variability of the side wall under the station platform slab and the station side wall.

[0170] Moreover, this embodiment covers not only the construction of section tracks, but also the construction of station track models, filling the gap in professional BIM applications for urban rail tracks and realizing BIM modeling of mainline tracks.

[0171] It should be noted that the spatial three-dimensional local positioning of the station roadbed preliminary model, section roadbed preliminary model, rail model, and accessory component model and the construction order of the station roadbed model and section roadbed model are not fixed and can be set according to actual site conditions.

[0172] Similarly, the step of adding attribute information to the rail model, the ballast model and the accessory components can be performed after the rail model, the accessory component model, the station ballast model and the section ballast model have been constructed, or the attributes can be added each time a model is constructed.

[0173] It can be understood that since the track bed constructed in this embodiment has mileage coordinate attributes, after the model is lightweighted by the BIM-based track intelligent operation and maintenance system, the mileage coordinate attributes attached to the track bed model can be integrated with the GIS system to carry out the full life cycle application of design, construction, and operation and maintenance. Fig.11shown.

[0174] Example 5

[0175] The difference between this embodiment and embodiment 4 is that: in order to solve the problem that the transverse drainage ditch may have a reverse slope, the slope change of the longitudinal drainage ditch may be inconsistent with the longitudinal slope of the roadbed, especially the problem that the traditional method cannot solve the variability of the station roadbed ditch, a station roadbed drainage ditch deepening module and an interval roadbed drainage deepening module are also designed, such as Fig.12 As shown, the station roadbed drainage deepening module includes a station roadbed drainage ditch deepening module, and the station roadbed drainage ditch deepening module is used to perform detailed deepening processing on the drainage ditch of the station roadbed preliminary model based on the station drainage ditch setting range and slope change points.

[0176] It should be noted that the detailed deepening of the drainage ditch of the preliminary model of the station roadbed can occur after the preliminary model of the station roadbed is constructed, but before the station roadbed limit is widened; of course, it can also occur after the preliminary model of the station roadbed is widened.

[0177] The interval roadbed drainage deepening module also includes an interval roadbed model deepening function module I and an interval roadbed model deepening function module II. The interval roadbed model deepening function module I is used to perform detailed deepening processing on the transverse drainage ditch of the interval roadbed preliminary model based on the location of the interval transverse drainage ditch and the sump; the interval roadbed model deepening function module II is used to perform detailed deepening processing on the longitudinal drainage ditch of the interval roadbed preliminary model based on the setting range of the interval longitudinal drainage ditch and the slope change point;

[0178] Among them, the parameterized odometer creation module sets the coordinates of the line element points, the roadbed dimensions and the parameters of the auxiliary components in the odometer, and also sets the station drainage ditch setting range and slope change points, the section transverse drainage ditch and sump positioning, and the section longitudinal drainage ditch setting range and slope change points.

[0179] In one embodiment, if Figure 4 As shown, the station track bed drainage ditch deepening module includes:

[0180] The first drawing and marking module is used to draw the edge line of the roadbed drainage ditch and mark the depth of the drainage ditch in different areas;

[0181] The ditch bottom three-dimensional surface construction module is used to construct the ditch bottom three-dimensional surface based on the station line three-dimensional center line, the coordinates of the element points in the roadbed odometer, the station drainage ditch setting range and the slope change point, the drainage ditch edge line and the depth mark; wherein, the parameterized odometer creation module sets the line element point coordinates, the station roadbed height and the auxiliary component parameters in the odometer, and also sets the station drainage ditch setting range and the slope change point;

[0182] The first three-dimensional edge line construction module is used to project the drainage ditch edge line onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the ditch bottom to construct the three-dimensional edge line of the drainage ditch;

[0183] The first difference operation module is used to construct the drainage ditch geometry based on the drainage ditch three-dimensional edge line, perform Boolean difference operation on the drainage ditch geometry and the station roadbed limit widening model, and construct the station roadbed drainage ditch deepening model.

[0184] Since the drainage ditch edge line is constructed on-site according to the actual drainage ditch, the three-dimensional projection of the rail top and the three-dimensional projection of the ditch bottom of the drainage ditch edge line are calculated, and then the drainage ditch geometry is constructed by the three-dimensional projection. The drainage ditch geometry also matches the actual drainage ditch. The in-depth model of the station roadbed drainage ditch obtained by performing Boolean difference operation between the drainage ditch and the preliminary model of the station roadbed that does not include the drainage ditch also matches the actual drainage ditch situation, thereby coping with the complexity of the station drainage ditch, especially the drainage ditch setting in the turnout area, and can accurately reflect the changes in the lateral and longitudinal slopes of the ditch.

[0185] In one embodiment, if Fig.13 As shown, the section track bed model deepening function module I includes:

[0186] A transverse drainage ditch cross-section profile family, wherein the drainage ditch cross-section profile family includes a first transverse drainage ditch cross-section profile and a second transverse drainage ditch cross-section profile, the size and the superelevation of the ditch top surface of which are adjustable; the transverse drainage ditch slope corresponding to the first transverse drainage ditch cross-section profile is consistent with the superelevation slope of the ballast bed; the transverse drainage ditch slope corresponding to the second transverse drainage ditch cross-section profile is opposite to the superelevation slope of the ballast bed;

[0187] The superelevation calculation module of the transverse drainage ditch is used to calculate the superelevation at the transverse drainage ditch according to the relative position relationship between the transverse drainage ditch position setting in the roadbed odometer and the coordinates of the element points, that is, Table 1;

[0188] A drainage ditch cross-section profile selection module is used to determine whether the transverse drainage ditch slope is consistent with the roadbed superelevation slope according to the transverse drainage ditch position setting in the roadbed odometer and the roadbed superelevation direction, and select the first transverse drainage ditch cross-section profile when they are consistent, and select the second transverse drainage ditch cross-section profile when they are inconsistent;

[0189] The contour placement module is used to place the selected gutter section contour at the start and end points and associated feature points along the three-dimensional center line of the clipped route, and set the size parameters accordingly; if the selected gutter section contour is the first transverse gutter section contour, the gutter top surface superelevation also needs to be set;

[0190] The drainage ditch layout module is used to layout the cross-sectional contour of the transverse drainage ditch along the three-dimensional center line of the clipped line, clip the layout result according to the transverse drainage ditch position setting and the ditch width setting to obtain the transverse drainage ditch geometry, and perform Boolean difference operation on the transverse drainage ditch geometry and the preliminary model of the roadbed to obtain the deepening model of the roadbed transverse drainage ditch.

[0191] It should be noted that the interval roadbed deepening model I is applicable to the deepening of transverse drainage ditches of roadbeds with various cross-section forms, such as roadbeds with a central ditch, roadbeds without a central ditch, and roadbeds without a super-elevated ditch on the inner side of a curved section.

[0192] Since the geometric shape of the drainage ditch is constructed on-site according to the actual drainage ditch, it is consistent with the actual drainage ditch. The deepening model of the station roadbed drainage ditch obtained by performing Boolean difference operation on it and the preliminary model of the station roadbed that does not include the drainage ditch also matches the actual drainage ditch situation. It can accurately reflect the changes in the lateral and longitudinal slopes of the ditch, solve the changes in the geometric shape of the lateral drainage ditch caused by any roadbed superelevation and different lateral drainage ditch slopes, and realize the automatic deepening of the lateral drainage ditch of the roadbed.

[0193] In one embodiment, if Fig.14 As shown, the section track bed model deepening function module II includes:

[0194] A family of longitudinal drainage ditch cross-section profiles, wherein the family of drainage ditch cross-section profiles includes longitudinal drainage ditch cross-section profiles with adjustable size, ditch depth and superelevation;

[0195] The longitudinal drainage ditch superelevation calculation module is used to calculate the ditch depth at the starting and ending points, the associated element points and the superelevation at the longitudinal drainage ditch slope change point according to the relative position relationship between the starting and ending points, the associated element points and the longitudinal drainage ditch slope change point in the track bed odometer, i.e., Table 1;

[0196] The contour placement module is used to place the longitudinal drainage ditch section contour at the start and end points, associated feature points, and associated slope change points along the three-dimensional center line of the cut line, and to set the longitudinal drainage ditch section contour size, ditch depth, and superelevation accordingly;

[0197] The drainage ditch layout module is used to layout the cross-sectional contour of the longitudinal drainage ditch along the three-dimensional center line of the cropped line, and to perform Boolean difference operation on the layout result and the preliminary model of the ballast bed to obtain the deepening model of the longitudinal drainage ditch of the ballast bed.

[0198] Since the geometric shape of the drainage ditch is constructed on-site according to the actual drainage ditch, it matches the actual drainage ditch. The deepening model of the station roadbed drainage ditch obtained by performing Boolean difference operation with the preliminary model of the station roadbed that does not include the drainage ditch also matches the actual drainage ditch situation. It can accurately reflect the changes in the lateral and longitudinal slopes of the ditch, solve the problem of inconsistency between the slope change of the longitudinal drainage ditch and the longitudinal slope of the roadbed, especially when there is a change in the slope section of the longitudinal drainage ditch, and realize automatic deepening of the longitudinal drainage ditch of the roadbed.

[0199] It should be noted that there is no specific order for deepening the longitudinal drainage ditch of the interval roadbed and deepening the transverse drainage ditch of the interval roadbed. Therefore, in one embodiment, the preliminary model of the interval roadbed can be constructed first, then the deepening model of the transverse drainage ditch of the interval roadbed can be constructed, and finally the deepening model of the longitudinal drainage ditch of the interval roadbed can be constructed. In another embodiment, the preliminary model of the interval roadbed can be constructed first, then the deepening model of the longitudinal drainage ditch of the interval roadbed can be constructed, and finally the deepening model of the transverse drainage ditch of the interval roadbed can be constructed.

[0200] It is understandable that after deepening the drainage ditches of the station roadbed and the section roadbed, it is necessary to further deepen the auxiliary components of the ditch covers. Preferably, the ditch covers include section ditch covers, station transverse ditch covers and station longitudinal ditch covers. Among them, the laying logic of the transverse ditch covers provides two methods: one-way laying and two-way laying, which support the laying of transverse ditch covers without a central ditch bed and with a central ditch bed respectively. The laying of the longitudinal ditch covers is only affected by the setting range of the drainage ditch, and is not affected by the starting and ending mileage coordinates of a single roadbed, that is, the cover can be laid across adjacent roadbeds, which is more in line with the actual situation on site.

[0201] Example 6

[0202] The difference between this embodiment and embodiment 4 or 5 is that the station roadbed drainage deepening module also includes a station roadbed sump deepening module. In this case, the urban rail track basic information model intelligent generation system is as follows: Fig.15 The station track bed sump deepening module is as shown. Figure 6 As shown, including:

[0203] The second drawing and marking module is used to draw the edge of the sump and mark the depth of the sump in different areas;

[0204] The pit bottom 3D surface construction module is used to construct the pit bottom 3D surface according to the sump edge line and depth annotation;

[0205] The second three-dimensional edge construction module is used to project the edge of the sump onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the pit bottom to construct the three-dimensional edge of the sump;

[0206] The second difference operation module is used to construct the geometric shape of the sump based on the three-dimensional edge of the sump, perform Boolean difference operation on the geometric shape of the sump and the station roadbed limit widening model, and construct the station roadbed sump deepening model.

[0207] In this process, since the geometric shape of the sump is established according to the actual site conditions, the in-depth model of the station roadbed drainage ditch obtained by performing Boolean difference operation between it and the preliminary model of the station roadbed that does not include the sump also matches the actual site conditions and can adapt to the variability of the station roadbed ditch.

[0208] It can be understood that there is no specific order for the construction of the sump and the construction of the drainage ditch. Therefore, in one embodiment, a preliminary model of the station roadbed can be constructed first, and then a deepening model of the station roadbed drainage ditch can be constructed. Finally, the sump geometry can be constructed according to the actual sump situation, and the sump geometry can be Boolean difference operation can be performed between the sump geometry and the preliminary model of the station roadbed, so as to finally obtain the deepening model of the station roadbed sump. In another embodiment, a preliminary model of the station roadbed can be constructed first, and then a deepening model of the station roadbed sump can be constructed according to the actual sump situation, and finally, the drainage ditch geometry can be constructed according to the actual drainage ditch situation, and the drainage ditch geometry can be Boolean difference operation can be performed between the preliminary model of the station roadbed, so as to finally obtain the deepening model of the station roadbed drainage ditch.

[0209] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. An intelligent generation system for urban rail station track bed model, characterized in that: include: A component library, wherein the component library includes a parametric model, wherein the parametric model includes at least a station roadbed section profile family with adjustable size and superelevation parameters, wherein the station roadbed section profile family includes a plurality of station roadbed section profiles that do not include a drainage ditch section form; 3D centerline creation module, used to create 3D centerline of station lines based on station construction design drawings; The parameterized odometer creation module is used to calculate the starting and ending mileage coordinates of the station track bed, create the track bed odometer, and set the station line feature point coordinates and station track bed height parameters in the odometer; The station roadbed intelligent modeling function module is used to create a preliminary model of the station roadbed based on the three-dimensional center line of the station line, the roadbed odometer, the pre-set station roadbed width and the station roadbed section profile family, where the pre-set station roadbed width is absolutely greater than the width value of the ordinary station roadbed; The station trackbed model limit widening and deepening function module is used to draw the side wall edge lines under the platform slab and the station side wall edge lines; construct the three-dimensional surface of the track top based on the three-dimensional center line of the station line and the coordinates of the feature points in the trackbed odometer; project the side wall edge lines onto the three-dimensional surface of the track top to construct the three-dimensional edge lines; construct geometric shapes based on the side wall edge lines and the corresponding three-dimensional edge lines, perform Boolean intersection operations on the geometric shapes and the preliminary model of the station trackbed, and obtain the station trackbed limit widening model.

2. The intelligent generation system of the urban rail station track bed model according to claim 1 is characterized in that: It also includes a station roadbed drainage ditch deepening module, which includes: The first drawing and marking module is used to draw the edge line of the roadbed drainage ditch and mark the depth of the drainage ditch in different areas; The ditch bottom three-dimensional surface construction module is used to construct the ditch bottom three-dimensional surface based on the station line three-dimensional center line, the coordinates of the element points in the roadbed odometer, the station drainage ditch setting range and slope change points, the drainage ditch edge line and depth annotation; wherein, the parameterized odometer creation module sets the line element point coordinates and the station roadbed height parameters in the roadbed odometer, and also sets the station drainage ditch setting range and slope change points; The first three-dimensional edge line construction module is used to project the drainage ditch edge line onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the ditch bottom to construct the three-dimensional edge line of the drainage ditch; The first difference operation module is used to construct the drainage ditch geometry based on the three-dimensional edge line of the drainage ditch, perform Boolean difference operation on the drainage ditch geometry and the station roadbed limit widening model, and construct the station roadbed drainage ditch deepening model.

3. The intelligent generation system of the urban rail station track bed model according to claim 1 or 2, characterized in that: It also includes a station roadbed sump deepening module, which includes: The second drawing and marking module is used to draw the edge of the sump and mark the depth of the sump in different areas; The pit bottom 3D surface construction module is used to construct the pit bottom 3D surface according to the sump edge line and depth annotation; The second three-dimensional edge construction module is used to project the edge of the sump onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the pit bottom to construct the three-dimensional edge of the sump; The second difference operation module is used to construct the geometric shape of the sump based on the three-dimensional edge of the sump, perform Boolean difference operation on the geometric shape of the sump and the station roadbed limit widening model, and construct the station roadbed sump deepening model.

4. An intelligent generation system for urban rail track basic information model, characterized in that: include: A component library, wherein the component library includes parameterized models, wherein the parameterized models include at least a station roadbed section profile family, an interval roadbed section profile family, a rail section profile family, and an auxiliary component model, wherein the station roadbed section profile family includes a plurality of station roadbed section profiles that do not include a drainage ditch section form, and the interval roadbed section profile family includes a plurality of interval roadbed section profiles that do not include a drainage ditch section form; 3D centerline creation module, used to create the 3D centerline of the line based on the construction design drawing; The parameterized odometer creation module is used to calculate the starting and ending mileage coordinates of rails and ballasts, create rail and ballast odometers, and set the coordinates of line element points, ballast dimensions, and auxiliary component parameters in the odometer; The station roadbed intelligent modeling function module is used to create a preliminary model of the station roadbed based on the three-dimensional center line of the line, the roadbed odometer, the pre-set station roadbed width and the station roadbed section profile family, where the pre-set station roadbed width is absolutely greater than the width value of the ordinary station roadbed; The intelligent modeling function module of the track bed is used to create a preliminary model of the track bed based on the three-dimensional center line of the line, the track bed odometer and the track bed section profile family; The station track bed model limit widening and deepening function module is used to draw the side wall edge line under the platform plate and the station side wall edge line; construct the three-dimensional surface of the track top based on the three-dimensional center line of the line and the coordinates of the element points in the odometer; project the side wall edge line onto the three-dimensional surface of the track top to construct the three-dimensional edge line; construct a geometric shape based on the side wall edge line and the corresponding three-dimensional edge line, perform Boolean intersection operation on the geometric shape and the preliminary model of the station track bed, and obtain the station track bed limit widening model; Rail intelligent modeling function module, used to create rail models based on the line 3D centerline, rail odometer and rail section profile family; The accessory component deepening function module is used to realize the spatial three-dimensional local positioning of the accessory component model based on the accessory component parameter settings in the odometer; The coding and attribute adding function module is used to add attribute information to the rail model, track bed model and auxiliary components.

5. The intelligent generation system of urban rail track basic information model according to claim 4 is characterized in that: It also includes a station roadbed drainage deepening module and an interval roadbed drainage deepening module, wherein the station roadbed drainage deepening module includes a station roadbed drainage ditch deepening module, and the station roadbed drainage ditch deepening module is used to perform detailed deepening processing on the drainage ditch of the station roadbed preliminary model based on the station drainage ditch setting range and slope change point; The interval roadbed drainage deepening module also includes an interval roadbed model deepening function module I and an interval roadbed model deepening function module II. The interval roadbed model deepening function module I is used to perform detailed deepening processing on the transverse drainage ditch of the interval roadbed preliminary model based on the location of the interval transverse drainage ditch and the sump; the interval roadbed model deepening function module II is used to perform detailed deepening processing on the longitudinal drainage ditch of the interval roadbed preliminary model based on the setting range of the interval longitudinal drainage ditch and the slope change point; Among them, the parameterized odometer creation module sets the coordinates of the line element points, the roadbed dimensions and the parameters of the auxiliary components in the odometer, and also sets the station drainage ditch setting range and slope change points, the section transverse drainage ditch and sump positioning, and the section longitudinal drainage ditch setting range and slope change points.

6. The intelligent generation system of urban rail track basic information model according to claim 5 is characterized in that: The station track bed drainage ditch deepening module includes: The first drawing and marking module is used to draw the edge line of the roadbed drainage ditch and mark the depth of the drainage ditch in different areas; The ditch bottom three-dimensional surface construction module is used to construct the ditch bottom three-dimensional surface based on the station line three-dimensional center line, the coordinates of the element points in the roadbed odometer, the station drainage ditch setting range and the slope change point, the drainage ditch edge line and the depth mark; wherein, the parameterized odometer creation module sets the line element point coordinates, the station roadbed height and the auxiliary component parameters in the odometer, and also sets the station drainage ditch setting range and the slope change point; The first three-dimensional edge line construction module is used to project the drainage ditch edge line onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the ditch bottom to construct the three-dimensional edge line of the drainage ditch; The first difference operation module is used to construct the drainage ditch geometry based on the three-dimensional edge line of the drainage ditch, perform Boolean difference operation on the drainage ditch geometry and the station roadbed limit widening model, and construct the station roadbed drainage ditch deepening model.

7. The intelligent generation system of urban rail track basic information model according to claim 5 is characterized in that: The section track bed model deepening function module I includes: A transverse drainage ditch cross-section profile family, wherein the drainage ditch cross-section profile family includes a first transverse drainage ditch cross-section profile and a second transverse drainage ditch cross-section profile, the size and the superelevation of the ditch top surface of which are adjustable; the transverse drainage ditch slope corresponding to the first transverse drainage ditch cross-section profile is consistent with the superelevation slope of the ballast bed; the transverse drainage ditch slope corresponding to the second transverse drainage ditch cross-section profile is opposite to the superelevation slope of the ballast bed; The superelevation calculation module of the transverse drainage ditch is used to calculate the superelevation at the transverse drainage ditch according to the relative position relationship between the transverse drainage ditch position setting in the roadbed odometer and the coordinates of the feature point; A drainage ditch cross-section profile selection module is used to determine whether the transverse drainage ditch slope is consistent with the roadbed superelevation slope according to the transverse drainage ditch position setting in the roadbed odometer and the roadbed superelevation direction, and select the first transverse drainage ditch cross-section profile when they are consistent, and select the second transverse drainage ditch cross-section profile when they are inconsistent; The contour placement module is used to place the selected gutter section contour at the start and end points and associated feature points along the three-dimensional center line of the clipped route, and set the size parameters accordingly; if the selected gutter section contour is the first transverse gutter section contour, the gutter top surface superelevation also needs to be set; The drainage ditch layout module is used to layout the cross-sectional contour of the transverse drainage ditch along the three-dimensional center line of the clipped line, clip the layout result according to the transverse drainage ditch position setting and the ditch width setting to obtain the transverse drainage ditch geometry, and perform Boolean difference operation on the transverse drainage ditch geometry and the preliminary model of the roadbed to obtain the deepening model of the roadbed transverse drainage ditch.

8. The intelligent generation system of urban rail track basic information model according to claim 5 is characterized in that: The section trackbed model deepening function module II includes: A family of longitudinal drainage ditch cross-section profiles, wherein the family of drainage ditch cross-section profiles includes longitudinal drainage ditch cross-section profiles with adjustable size, ditch depth and superelevation; The longitudinal drainage ditch superelevation calculation module is used to calculate the ditch depth at the starting and ending points, the associated element points and the superelevation at the longitudinal drainage ditch slope change point according to the relative position relationship between the starting and ending points, the associated element points and the longitudinal drainage ditch slope change point in the ballast odometer after the trimming of the three-dimensional center line of the line; The contour placement module is used to place the longitudinal drainage ditch section contour at the start and end points, associated feature points, and associated slope change points along the three-dimensional center line of the cut line, and to set the longitudinal drainage ditch section contour size, ditch depth, and superelevation accordingly; The drainage ditch layout module is used to layout the cross-sectional contour of the longitudinal drainage ditch along the three-dimensional center line of the cropped line, and to perform Boolean difference operation on the layout result and the preliminary model of the ballast bed to obtain the deepening model of the longitudinal drainage ditch of the ballast bed.

9. The intelligent generation system of urban rail track basic information model according to claim 5 is characterized in that: The station roadbed drainage deepening module also includes a station roadbed sump deepening module, and the station roadbed sump deepening module includes: The second drawing and marking module is used to draw the edge of the sump and mark the depth of the sump in different areas; The pit bottom 3D surface construction module is used to construct the pit bottom 3D surface according to the sump edge line and depth annotation; The second three-dimensional edge construction module is used to project the edge of the sump onto the three-dimensional curved surface of the rail top and the three-dimensional curved surface of the pit bottom to construct the three-dimensional edge of the sump; The second difference operation module is used to construct the geometric shape of the sump based on the three-dimensional edge of the sump, perform Boolean difference operation on the geometric shape of the sump and the station roadbed limit widening model, and construct the station roadbed sump deepening model.

10. An intelligent generation system for urban rail track basic information model according to any one of claims 5 to 9, characterized in that: The station track bed intelligent modeling function module includes: The station track bed laying direction judgment module links the three-dimensional center line of the line, calculates the starting point coordinates and the end point coordinates of the station line in the three-dimensional center line of the line, and judges the station track bed laying direction according to the starting point coordinates and the end point coordinates; The station track bed superelevation direction judgment module clips the three-dimensional center line of the line based on the starting point coordinates and the end point coordinates of the station line to obtain the three-dimensional center line of the station line; calculates the projection coordinates of the starting point coordinates and the end point coordinates of the three-dimensional center line of the station line on the horizontal plane, and determines the station track bed superelevation setting direction based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane; The station track bed superelevation calculation module calculates the superelevation at the start and end points and the element points according to the relative position relationship between the projection coordinates of the start and end points on the horizontal plane and the element point coordinates in the odometer; The module for preset station track bed width is used to preset the station track bed width; The station track bed contour placement module places the station track bed contour at the start and end points and associated feature points along the three-dimensional center line of the station line, and sets the track bed size and superelevation according to the parameter settings in the track bed odometer, the calculation results of the track bed superelevation setting module and the track bed superelevation calculation module, and the preset station track bed width; The station track bed contour lofting module is used to loft the station track bed contour along the three-dimensional center line of the station line and create a preliminary model of the station track bed; The intelligent modeling function module of the track bed includes: The section roadbed laying direction judgment module links the three-dimensional center line of the line, calculates the starting point coordinates and the end point coordinates of the section line in the three-dimensional center line of the line, and judges the section roadbed laying direction according to the starting point coordinates and the end point coordinates; The module for judging the superelevation direction of the track bed cuts the three-dimensional center line of the track based on the starting point coordinates and the end point coordinates of the track bed to obtain the three-dimensional center line of the track bed; calculates the projection coordinates of the starting point coordinates and the end point coordinates of the three-dimensional center line of the track bed on the horizontal plane, and judges the setting direction of the superelevation of the track bed based on the projection coordinates of the starting point coordinates and the end point coordinates on the horizontal plane; The superelevation calculation module of the interval track bed calculates the superelevation at the start and end points and the element points according to the relative position relationship between the projection coordinates of the start and end points on the horizontal plane and the coordinates of the element points in the odometer; The section roadbed contour placement module places the section roadbed contour at the starting and ending points and associated feature points along the three-dimensional center line of the section line, and sets the roadbed size and superelevation according to the parameter settings in the roadbed odometer, the calculation results of the roadbed superelevation setting module and the roadbed superelevation calculation module; The section roadbed contour lofting module is used to loft the section roadbed contour along the three-dimensional center line of the section line and create a preliminary model of the section roadbed.

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