CN112231799A - BIM-based rapid modeling method for intelligent line selection and trend scheme of railway - Google Patents
BIM-based rapid modeling method for intelligent line selection and trend scheme of railway Download PDFInfo
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Abstract
The invention relates to the technical field of railway route selection, in particular to a BIM-based quick modeling method for an intelligent route selection trend scheme of a railway, which comprises the following steps: 1. acquiring data; 2. reading data and creating a three-dimensional terrain curved surface entity; 3. generating a line design scheme result file; 4. creating a space point; 5. automatically generating a horizontal line; 6. automatically creating a longitudinal section map and a terrain longitudinal section; 7. automatically arranging the designed longitudinal section of the line; 8. automatically distinguishing and marking three kinds of structures such as roadbeds, bridges and tunnels along the whole line; 9. establishing standard condition assembly of the roadbed sections; 10. automatically creating roads and road curved surfaces; 11. and (4) introducing the curved surface of the road into Infraworks, adding a bridge, a tunnel and a track, and completing BIM modeling and scheme display of the whole line of the line scheme. The invention can realize BIM three-dimensional modeling of intelligent route selection results quickly, accurately and normatively.
Description
Technical Field
The invention relates to the technical field of railway route selection, in particular to a BIM-based quick modeling method for an intelligent route selection trend scheme of a railway.
Background
The BIM (building Information modeling) technology integrates various data of engineering projects by using a digital model, has the advantages of visualization, coordination, optimization, simulation, Information comprehensiveness and the like, and can provide great convenience in various stages of design, construction and operation of the projects.
The intelligent line selection combines technologies such as GIS and artificial intelligence, can provide diversified line alternative schemes for designers, provides intelligent decision support for railway line trend research and interval scheme research, and effectively improves the speed and quality of line selection work.
However, most of the existing intelligent line selection methods are stronger than algorithm design, the scheme display of the line selection results still remains in simple two-dimensional expression, and particularly, the scheme display research combined with the geographic environment and matched with other specialties is less.
Disclosure of Invention
The invention provides a BIM-based rapid modeling method for an intelligent line selection trend scheme of a railway, which can overcome certain defects in the prior art.
The BIM-based railway intelligent line selection trend scheme rapid modeling method is characterized by comprising the following steps of: the method comprises the following steps:
s1, acquiring Digital Elevation Model (DEM) data and basic geographic information vector data in a line selection area;
s2, reading the data in the step S1 by using a Civil3D secondary development technology, and automatically creating a three-dimensional terrain curved surface entity of a research area covered with basic geographic information vectors in Civil3D software;
s3, carrying out optimization design on the railway intelligent route selection algorithm in Civil3D to generate a line design scheme result file VPIs;
s4, reading the line design scheme result file generated in the step S3 by using a Civil3D secondary development technology, and creating a series of space points CogoPoint with elevation information in a Civil3D database;
s5, using a Civil3D secondary development technology to fit the spatial points generated in the step S4 into a two-dimensional continuous curve meeting the line standard in a connected mode, and automatically generating horizontal line Alignment;
s6, automatically creating a profile view and a surface profile of the terrain according to the terrain curved surface generated in the step S2 and the horizontal line generated in the step S5 by using a Civil3D secondary development technology;
s7, obtaining the horizontal line Alignment pile number generated in the step S5 according to the horizontal position coordinates of the result files VPIs generated in the step S3, and automatically arranging the design vertical section DesignProfile of the line in the vertical section view generated in the step S6 according to the VPIs design elevation information generated in the step S3;
s8, according to the terrain longitudinal section generated in the step S6 and the design longitudinal section generated in the step S7, combining the maximum embankment filling height and the maximum cutting excavation depth, and taking the pile number as a mark, automatically distinguishing and marking three kinds of structure categories of a roadbed, a bridge and a tunnel along the whole line;
s9, establishing a roadbed Assembly by using a Civil3D secondary development technology;
s10, automatically creating a road and a road curved surface by using a Civil3D secondary development technology and assembling Assembly according to a horizontal line Alignment, a design profile, a terrain profile and a roadbed;
s11, importing the road curved surface created by Civil3D into Infraworks in an IMX format, adding bridges, tunnels and tracks, and completing BIM modeling and scheme display of the whole line of the line scheme.
Preferably, in step S1, coordinate system transformation is performed on the geographic elevation grid data with 30m accuracy by using GIS software, and geographic information data in the research range are uniformly converted into a UTM projection coordinate system;
wherein the basic geographic information vector data comprises: data which can be directly read by Civil3D, data located in an independent map layer, a natural protected area, environment sensitive data, a geological bad area, existing infrastructure data, town village distribution data and water system distribution vector data.
Preferably, in step S2, performing secondary development on Civil3D, reading a DEM file path in a Civil3D database according to an existing tif-format DEM file, and automatically creating a grid surface entity GridSurface within a research range; adding basic geographic information vector data blocks to the same positions of terrain and curved surface entities in a Civil3D database, and accurately matching the corresponding vector representation area range with the curved surface positions; information such as a three-dimensional terrain curved surface, a basic geographic information data vector block entity style, a map layer and the like is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
Preferably, in step S3, the intelligent railway route selection algorithm is: and taking the connection cost of the terrain curved surface meshes as the engineering cost, taking the global minimum of the engineering cost as an objective function, taking the basic geographic information data as a real-time background, taking the railway route selection technical standard as a constraint condition, and taking the route terminal point as a target point to finally obtain an algorithm of a global optimal route trend scheme considering the constraint.
Preferably, in step S4, the spatial point pattern, the layer and the label pattern information are predefined by a.dwt sample file and are directly called in the Civil3D database when generated.
Preferably, in step S5, the route standard to be followed when generating the two-dimensional curve includes: curve radius, length of gentle curve, length of curve and limitation of vertical and slow overlapping; creating a horizontal line Alignment in a Civil3D database, and fitting all space points into a two-dimensional continuous curve by a Civil3D built-in method; the horizontal line pattern, layer and label pattern information is predefined by a dwt sample file and is directly called in the Civil3D database when generated.
Preferably, in step S6, the longitudinal section map and the topographic longitudinal section style, layer and label style information are predefined by one dwt sample file and are directly called in the Civil3D database when generated.
Preferably, in step S7, a Civil3D secondary development technology is used, and according to the stake number and the design elevation of the VPIs, a design longitudinal section consisting of a tangent line and a tangent line is generated in the longitudinal section diagram of S6, and then the design longitudinal section is fitted into a continuous curve according to the line design standard; and the entity style, the layer and the label style information of the design profile are predefined by a dwt sample file and are directly called in a Civil3D database during generation.
Preferably, in step S9, the assembled entity style, layer and generation location information are predefined by a.dwt sample file and are directly called in the Civil3D database when generated.
Preferably, in step S10, the entity style and the layer information of the road and the road surface are predefined by a.dwt sample file, and are directly called in the Civil3D database when being generated.
The invention provides a BIM-based rapid modeling method for a railway intelligent route selection trend scheme, which solves the problems that the current railway intelligent route selection result is crude in output, the route scheme expression is not visual, and the subsequent professional design is disjointed. By using a secondary development technology, respective advantages of BIM software such as Civil3D and Infraworks are cooperatively utilized, and BIM three-dimensional modeling of an intelligent line selection result can be rapidly, accurately and normatively realized. And the line scheme is visualized efficiently by combining geographic information data. By utilizing the advantages of BIM technical information management and data sharing, the line scheme can be dynamically modified, and BIM models can be delivered to roadbeds, bridges, tunnels and other specialties for optimization design.
Drawings
Fig. 1 is a flowchart of a rapid modeling method for a BIM-based intelligent route selection trend scheme of a railway in embodiment 1.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Example 1
As shown in fig. 1, the embodiment provides a rapid modeling method for a railway intelligent route selection trend scheme based on BIM, which is characterized in that: the method comprises the following steps:
s1, obtaining Digital Elevation Model (DEM) data and basic geographic information vector data in a line selection area.
And purchasing geographic elevation grid data with the precision of 30m, performing coordinate system tape changing on the grid data by using GIS professional software, and uniformly converting geographic information data in a research range into a UTM projection coordinate system.
The basic geographic information vector data includes: data which can be directly read by Civil3D, data located in an independent map layer, data of a natural protected area, data of an environmentally sensitive and geological poor area, existing infrastructure, town village distribution data and water system distribution vector data.
S2, reading the data in the step S1 by using a Civil3D secondary development technology, and automatically creating a three-dimensional terrain curved surface entity of the research area covered with basic geographic information vectors in Civil3D software.
And (4) carrying out secondary development on Civil3D, reading a DEM file path in a Civil3D database according to the DEM file in the existing tif format, and automatically creating a grid surface entity GridSurface in the research range.
And adding basic geographic information vector data blocks to the same positions of the terrain surface entities in a Civil3D database, wherein the corresponding vector representation area range is accurately matched with the surface positions.
Information such as a three-dimensional terrain curved surface, a basic geographic information data vector block entity style, a map layer and the like is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
And S3, carrying out optimization design on the railway intelligent route selection algorithm in Civil3D to generate a line design scheme result file.
The intelligent route selection of the railway is essentially to search out a connection starting point and a connection terminal point, and meets the multi-target coupling constraint and the path optimization problem with the lowest overall cost. The railway intelligent route selection algorithm is an algorithm which takes the connection cost of a terrain curved surface grid as engineering cost, takes the global minimum of the engineering cost as a target function, takes basic geographic information data as a real-time background, takes a railway route selection technical standard as a constraint condition, and takes a route terminal point as a target point to finally obtain a global optimal route trend scheme considering the constraint.
The line design scheme result file generated by the intelligent line selection algorithm is a txt format file which lists a series of Horizontal control point Horizontal Points of interaction, HPIs and Vertical control point Vertical Points of interaction and HPIs position distribution information. The file content comprises a control point serial number, an X coordinate, a Y coordinate and a control point design elevation.
And S4, reading the line design scheme result file generated in the step S3 by using a Civil3D secondary development technology, and creating a series of space points CogoPoint with elevation information in a Civil3D database.
Information such as spatial point entity styles, layers, label styles and the like is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
And S5, using a Civil3D secondary development technology to fit the spatial point connection generated in the step S4 into a two-dimensional continuous curve meeting the line standard, and automatically generating an Alignment entity.
The line standards observed when the two-dimensional curve is generated comprise constraint conditions of curve radius, relaxation curve length, limitation of vertical and slow overlapping and the like.
And (3) creating a horizontal line Alignment entity in a Civil3D database, and fitting all spatial points into a two-dimensional continuous curve by a built-in method of Civil 3D.
Information such as a horizontal line entity pattern, a layer, a label pattern and the like is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
And S6, automatically creating a profile view and a surface profile of the terrain according to the terrain curved surface generated in the step S2 and the horizontal line generated in the step S5 by using a Civil3D secondary development technology.
And information such as entity styles, layers, label styles and the like of the longitudinal section diagrams and the terrain longitudinal sections are predefined by a dwt sample file and are directly called in a Civil3D database during generation.
S7, obtaining the horizontal line pile number generated in the step S5 according to the horizontal position coordinates of the product files VPIs generated in the step S3, and automatically arranging the design longitudinal section DesignProfile of the line in the longitudinal section diagram generated in the step S6 according to the VPIs design elevation information generated in the step S3.
According to the VPIs horizontal coordinate of S3, the Alignment stake number of the S5 horizontal line can be obtained. The horizontal coordinates of the vertical control points in the S6 longitudinal section diagram can be obtained by taking the pile numbers as indexes, and the design elevation of the VPIs is combined to generate a design longitudinal section of one line in the longitudinal section diagram.
By using a Civil3D secondary development technology, according to the stake number and the design height of VPIs, a design longitudinal section consisting of a tangent line and a tangent line (without a curve) is generated in a longitudinal section diagram of S6, and then the design longitudinal section is fitted into a continuous curve according to a line design standard.
And designing information such as entity styles, layers, label styles and the like of the longitudinal sections, wherein the information is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
And S8, automatically distinguishing and marking three structure types of a roadbed, a bridge and a tunnel along the whole line by taking the pile number as a mark according to the terrain longitudinal section generated in the step S6 and the design longitudinal section generated in the step S7 and combining the maximum embankment filling height and the maximum cutting excavation depth.
S9, using a Civil3D secondary development technology to create a road foundation section standard condition Assembly.
Information such as assembled entity styles, layers, generation positions and the like is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
S10, designing a design profile of a longitudinal section, a surface profile of a terrain, and a roadbed Assembly according to a horizontal line Alignment by using a Civil3D secondary development technology, and automatically creating a road and a road curved surface.
The information of the entity style, the layer and the like of the road and the road curved surface is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
S11, importing the road curved surface entity created by Civil3D into Infraworks in an IMX format, and adding bridges, tunnels and tracks. And (4) completing BIM modeling and scheme display of the whole line of the line scheme.
The invention aims to provide a BIM-based rapid modeling method for a railway intelligent route selection trend scheme, and solves the problems that the current railway intelligent route selection result is crude in output, a route scheme expression is not visual, and the subsequent professional design is disjointed. By using a secondary development technology, respective advantages of BIM software such as Civil3D and Infraworks are cooperatively utilized, and BIM three-dimensional modeling of an intelligent line selection result can be rapidly, accurately and normatively realized. And the line scheme is visualized efficiently by combining geographic information data. By utilizing the advantages of BIM technical information management and data sharing, the line scheme can be dynamically modified, and BIM models can be delivered to roadbeds, bridges, tunnels and other specialties for optimization design.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. A BIM-based rapid modeling method for an intelligent line selection and trend scheme of a railway is characterized by comprising the following steps: the method comprises the following steps:
s1, acquiring digital elevation model data and basic geographic information vector data in a line selection area;
s2, reading data in the step S1 by using a Civil3D secondary development technology, and automatically creating a three-dimensional terrain curved surface entity of a research area covered with basic geographic information vectors in Civil3D software;
s3, carrying out optimization design on the railway intelligent route selection algorithm in Civil3D to generate a result file of a route design scheme;
s4, reading the line design scheme result file generated in the step S3 by using a Civil3D secondary development technology, and creating a series of space points with elevation information in a Civil3D database;
s5, using a Civil3D secondary development technology to fit the spatial points generated in the step S4 into a two-dimensional continuous curve meeting the line standard, and automatically generating a horizontal line;
s6, automatically creating a vertical section diagram and a terrain vertical section by using a Civil3D secondary development technology according to the terrain curved surface generated in the step S2 and the horizontal line generated in the step S5;
s7, obtaining the horizontal line pile number generated in the step S5 according to the horizontal position coordinates of the result file generated in the step S3, and automatically arranging the design vertical section of the line in the vertical section diagram generated in the step S6 according to the result file design height information generated in the step S3;
s8, according to the terrain longitudinal section generated in the step S6 and the design longitudinal section generated in the step S7, combining the maximum embankment filling height and the maximum cutting excavation depth, and taking the pile number as a mark, automatically distinguishing and marking three kinds of structure categories of a roadbed, a bridge and a tunnel along the whole line;
s9, building roadbed assembly by using a Civil3D secondary development technology;
s10, automatically creating a road and a road curved surface by using a Civil3D secondary development technology according to horizontal lines, design longitudinal sections, terrain longitudinal sections and roadbed assembly;
s11, guiding the road curved surface created by Civil3D into Infraworks, adding bridges, tunnels and tracks, and completing BIM modeling and scheme display of the whole line of the line scheme.
2. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in the step S1, GIS software is used for carrying out coordinate system tape changing on the geographic elevation grid data with the precision of 30m, and geographic information data in a research range are uniformly converted into a UTM projection coordinate system;
wherein the basic geographic information vector data comprises: data which can be directly read by Civil3D, data located in an independent map layer, a natural protected area, environment sensitive data, a geological bad area, existing infrastructure data, town village distribution data and water system distribution vector data.
3. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in the step S2, carrying out secondary development on Civil3D, reading a DEM file path in a Civil3D database according to an existing DEM file in a tif format, and automatically creating a grid curved surface entity in a research range; adding basic geographic information vector data blocks to the same positions of terrain and curved surface entities in a Civil3D database, and accurately matching the corresponding vector representation area range with the curved surface positions; information such as a three-dimensional terrain curved surface, a basic geographic information data vector block entity style, a map layer and the like is predefined by a dwt sample file and is directly called in a Civil3D database during generation.
4. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in step S3, the railway intelligent route selection algorithm is: and taking the connection cost of the terrain curved surface meshes as the engineering cost, taking the global minimum of the engineering cost as an objective function, taking the basic geographic information data as a real-time background, taking the railway route selection technical standard as a constraint condition, and taking the route terminal point as a target point to finally obtain an algorithm of a global optimal route trend scheme considering the constraint.
5. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in step S4, the spatial point pattern, the layer and the label pattern information are predefined by a.dwt sample file, and are directly called in the Civil3D database during generation.
6. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in step S5, the route standard to be observed when generating the two-dimensional curve includes: curve radius, length of gentle curve, length of curve and limitation of vertical and slow overlapping; creating a horizontal line in a Civil3D database, and fitting all spatial points into a two-dimensional continuous curve by a built-in Civil3D method; the horizontal line pattern, layer and label pattern information is predefined by a dwt sample file and is directly called in the Civil3D database when generated.
7. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in step S6, the longitudinal section map and the topographic longitudinal section pattern, layer and label pattern information are predefined by one.dwt sample file, and are directly called in the Civil3D database during generation.
8. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in the step S7, a Civil3D secondary development technology is used, a design longitudinal section consisting of a tangent line and a tangent line is generated in a longitudinal section diagram of S6 according to the pile number and the design elevation of VPIs, and then the design longitudinal section is fitted into a continuous curve according to a line design standard; and the entity style, the layer and the label style information of the design profile are predefined by a dwt sample file and are directly called in a Civil3D database during generation.
9. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in step S9, the assembled entity style, layer, and generation location information are predefined by a.dwt sample file, and are directly called in the Civil3D database when generated.
10. The BIM-based railway intelligent route selection trend scheme rapid modeling method according to claim 1, characterized in that: in step S10, the entity style and the layer information of the road and the road surface are predefined by a single dwt sample file, and are directly called in the Civil3D database during generation.
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Application publication date: 20210115 |