CN113392348A - BIM-based tunnel main body structural steel IFC2x3 data visualization method - Google Patents
BIM-based tunnel main body structural steel IFC2x3 data visualization method Download PDFInfo
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- 229910000746 Structural steel Inorganic materials 0.000 title claims abstract description 42
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- 238000013079 data visualisation Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 132
- 239000010959 steel Substances 0.000 claims abstract description 132
- 238000013506 data mapping Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000013507 mapping Methods 0.000 claims abstract description 5
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- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
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- G06F16/116—Details of conversion of file system types or formats
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
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Abstract
The invention discloses a BIM-based data visualization method for a tunnel main body structural steel IFC2x3, which comprises the following steps: creating a tunnel main body structure steel bar model drawing file according to a tunnel main body structure steel bar two-dimensional drawing; exporting IFC2x3 standard files from the tunnel main body structure steel bar model drawing files according to the layers; analyzing the mapping relation between the IFC2x3 standard file and the DGN file, and establishing data mapping between the IFC2x3 standard file and the DGN file; converting the IFC2x3 file model of the tunnel main body structural steel bar into a DGN file by using a data interface; setting a conversion parameter by using a plug-in of the Microstation software, and converting the DGN file into the UDBX file; extracting attribute information of the main structural steel bar of the tunnel by using SuperMap iDesktop, and converting the UDBX file into a tile data S3M file; and visually displaying the tunnel main body structure steel bar model of the tile data S3M file on a BIMiServer platform, and checking the steel bar model and the engineering quantity information thereof. The invention solves the problem of incompatibility of conversion among different three-dimensional data formats and realizes the efficient browsing of the steel bar model.
Description
Technical Field
The invention relates to a BIM-based data visualization method for IFC2x3 of a main structural steel bar of a tunnel, belonging to the technical field of BIM model information visualization.
Background
At present, a steel bar is one of important materials in tunnel engineering, a two-dimensional drawing is created according to CAD (Computer Aided Design) in the traditional drawing of a main structure steel bar of a tunnel, the problem of conflict between the engineering quantity of the steel bar and the steel bar cannot be checked, and the visualization of a model realized by a BIM (Building Information Modeling) technology becomes a necessary trend. With the deep application of BIM technology in the field of traffic infrastructure, the BIM model has been gradually extended from planning, design to construction, operational management and decision-making. However, for the tunnel main body structure steel bar model, due to the fact that requirements of each specialty are different, different data standards and different data storage architectures are adopted among software, the tunnel steel bar model has the situations of information loss, model loss and the like in the transmission process; and integration at a World Wide Web (World Wide Web) end has become a focus of attention in the field of traffic infrastructure, and due to the large volume and the large amount of three-dimensional data of the steel bar model of the tunnel main body structure, when the Web end performs visual display, the problems of long loading time, poor browsing effect, system crash and the like can occur when the Web end processes massive three-dimensional data.
The data mapping between the IFC (Industry Foundation Class) file and other files is established by analyzing the IFC data file, and the IFC data file is converted into files with other formats and is the basis of data sharing. Xuzhao, Zhanghua, late Yingzi building 3D Tiles data visualization [ J ]. Zhejiang university journal (engineering edition), 2019,53(06): 1047-. However, the 3D Tiles file is complex in operation, low in expansion capability and insufficient in corresponding data interface.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for visualizing the IFC2x3 data of the tunnel main body structural steel bar based on the BIM can solve the problem of incompatibility of conversion among different three-dimensional data formats, ensure the integrity of an information model of the tunnel main body structural steel bar, reduce the loading time of the information model on a BIMiserver platform and realize efficient model browsing. When the main structure of the tunnel engineering is constructed, the conflict situation and the steel bar engineering quantity between the main structure steel bars of the tunnel can be checked at the Web end, and the Web end is used for guiding a construction party to modify the design of the conflict part of the main structure steel bar before construction, reducing rework and lowering the manufacturing cost.
The invention adopts the following technical scheme for solving the technical problems:
a BIM-based tunnel main body structural reinforcement IFC2x3 data visualization method comprises the following steps:
step 2, exporting an IFC2x3 standard file from the tunnel main body structure steel bar model drawing file according to the layer;
step 3, analyzing the mapping relation between the IFC2x3 standard file and the DGN file, and establishing data mapping between the IFC2x3 standard file and the DGN file;
step 4, converting the IFC2x3 standard file into a DGN file by using a data interface according to the data mapping established in the step 3;
step 6, extracting attribute information of the tunnel main body structure steel bar model from the UDBX file by using SuperMap iDesktop software, and converting the UDBX file into a tile data S3M file;
and 7, visually displaying the tunnel main body structure steel bar model of the tile data S3M file on a BIMiServer platform, and checking the steel bar model and the engineering quantity information thereof.
As a preferable scheme of the present invention, the tunnel main body structure steel bar model drawing file in step 1 is a file created by using Planbar software according to a two-dimensional CAD drawing, and the drawing file includes an information file and a model file, wherein the model file includes a tunnel main body structure steel bar three-dimensional model, and the information file includes a geometric size and a position of the tunnel main body structure steel bar three-dimensional model.
As a preferred embodiment of the present invention, the specific process of step 2 is as follows:
2.1, classifying the drawing files of the tunnel main body structure steel bar model in the step 1 according to steel bar types, wherein each type is called a layer; the types of the steel bars comprise straight steel bars, straight steel bars with hooks, diagonal draw bars and stirrups;
2.2, setting the coordinates of the central point of the steel bar model of the tunnel main body structure as (0, 0, 0), setting the model unit as mm and only selecting the steel bar model by using filtering elements;
2.3, exporting the IFC2x3 standard file according to the type of the steel bar by a map layer.
As a preferred embodiment of the present invention, the specific process of step 3 is as follows:
3.1, analyzing the IFC2x3 standard file, and splitting the IFC2x3 standard file into space information of a tunnel main body structural steel bar model and geometric expression information, material information and characteristic information of the tunnel main body structural steel bar; the spatial information refers to a spatial position coordinate system and coordinate information of a tunnel main body structure steel bar model, the geometric expression information comprises the diameter, the length, the height, the hook angle and the hook length of the tunnel main body structure steel bar, the material information refers to the type of the steel bar used by the tunnel main body structure steel bar, and the characteristic information refers to the type and the identifier of the tunnel main body structure steel bar;
3.2, analyzing the DGN file, and splitting the model attribute of the DGN file into geometric characteristics, material information, comprehensive information, extension information and identity information; the geometric characteristics comprise the volume and the surface area of the tunnel main body structure steel bar model and the size of the tunnel main body structure steel bar model, the material information refers to the connection material, the distribution material and the surface material of the tunnel main body structure steel bar model, the comprehensive information refers to the description, the unit name, the unit type and the elements of the tunnel main body structure steel bar model, the extension information refers to the creation time, the modification time, the model type and the ACS coordinate of the tunnel main body structure steel bar, and the identity information refers to the identifier of the tunnel main body structure steel bar;
3.3, reconstructing the semantics of the IFC2x3 standard file and the DGN file on the basis of 3.1 and 3.2, and establishing a data mapping between the IFC2x3 standard file and the DGN file.
As a preferred solution of the present invention, the data interface in step 4 is a data interface developed by using an extension tool MDL of Microstation according to the data mapping between the IFC2x3 standard file and the DGN file established in step 3.
As a preferred embodiment of the present invention, the specific process of step 5 is as follows:
using Microstation software to open a DGN file of a tunnel main body structure steel bar model, and inputting conversion parameters of the tunnel main body structure steel bar model into a model export plug-in, wherein the model export plug-in is a SuperMap plug-in for converting the DGN file into a UDBX file; the conversion parameters are used for determining the real geographical position of the tunnel main body structure steel bar model and comprise an origin point coordinate, an insertion point coordinate, a coordinate system and a derived element type; and selecting a sub-map layer to export to obtain a UDBX file of the main body structure steel bar model of the tunnel.
As a preferred embodiment of the present invention, the specific process of step 6 is as follows:
using SuperMap iDesktop software to open a UDBX file of a main body structure steel bar model of the tunnel, extracting attribute information of the main body structure steel bar model of the tunnel, wherein the attribute information comprises the volume, the surface area, the length, the diameter, the layer and the engineering quantity of the main body structure steel bar of the tunnel, and storing the attribute information of the main body structure steel bar model of the tunnel as a Prop data set; and converting the UDBX file of the tunnel main body structural steel bar model into a tile data set S3M file by adopting an octree pyramid index and a DXT texture compression format.
As a preferred embodiment of the present invention, the specific process of step 7 is as follows:
loading a tunnel main body structure steel bar model tile data S3M file on a BIMiServer platform, and setting parameters of a minimum visible distance, a maximum visible distance, a minimum visible height, a maximum visible height and a visible size of a tunnel main body structure steel bar according to a model layer; and checking the metering information of the main structural steel bars of the tunnel.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the invention takes BIM-Web as an application scene, and aims at different software and different three-dimensional data standards, and establishes mapping between different data standards by analyzing the data file, thereby realizing data compatibility, ensuring the integrity of data information, solving the problem that an IFC2x3 file model is visual to a Web end, and realizing the effects of quickly displaying, browsing and viewing the IFC2x3 data file on a BIMiserver platform. .
2. According to the invention, a tile data S3M file is generated from massive three-dimensional data, the three-dimensional data is managed by adopting a tree structure, the tile file is compressed, and the tile file has high-performance three-dimensional visualization and spatial analysis and improves rendering capability.
3. According to the invention, the main structural steel bars of the tunnel are browsed at the Web end, so that all parties can check collision conflicts among the main structural steel bars, and the resource optimization configuration is realized based on visual complex area design optimization.
4. The invention takes the Web end as a carrier of the three-dimensional model, has integration, dynamics, harmony and simulation, is convenient for the coordination of all parties and provides information support for finishing high-quality products.
Drawings
Fig. 1 is a flowchart of a method for visualizing data of a tunnel body structural reinforcement IFC2x3 based on BIM according to the present invention.
Fig. 2 is a chart file model of the tunnel body structural steel IFC2x3 created using Planbar software.
Fig. 3 is a structure diagram of an IFC2x3 standard file.
Fig. 4 is a diagram of a DGN file structure.
Fig. 5 is a diagram of correspondence between IFC2x3 standard files and DGN file partial data.
Fig. 6 is a DGN file model of the tunnel body structure steel.
Fig. 7 is a parameter setting diagram of the Microstation plug-in.
Fig. 8 is a view of a steel bar model of a main structure of a tunnel in a bimiser platform.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In order to enable a tunnel engineering main body structure to be constructed, the conflict situation and the steel bar engineering quantity between tunnel main body structure steel bars can be checked at a Web end, and the method is used for guiding a constructor to modify and design the conflict part of the main body structure steel bar before construction, reducing rework and lowering manufacturing cost; the problem of incompatibility of conversion between different three-dimensional data formats is solved, the integrity of the information model of the main structural steel bar of the tunnel is guaranteed, the loading time of the information model on the BIMiserver platform is shortened, efficient browsing of the model is realized, and a visual platform is provided for a constructor to guide construction.
As shown in fig. 1, a flow chart of a method for visualizing data of a tunnel main body structural reinforcement IFC2x3 based on BIM according to the present invention includes the following steps:
Drawing a three-dimensional model drawing file of the main structure steel bar of the tunnel by using Planbar software according to a two-dimensional CAD drawing of the main structure steel bar of the tunnel provided by a designer, as shown in FIG. 2; the drawing file includes: an information file and a model file; the model file comprises a three-dimensional model of the main structure steel bar of the tunnel, and the information file comprises the related information of the three-dimensional model of the main structure steel bar of the tunnel: geometry, location, etc.
And 2, exporting the drawing file of the tunnel main body structure steel bar model according to the layer to obtain an IFC2x3 standard file.
The image layers are obtained by classifying the drawing files of the tunnel main body structure steel bar model in the step 1 according to the types of the steel bars, wherein each type is called an image layer; the types of the steel bars comprise straight steel bars, straight steel bars with hooks, diagonal draw bars and stirrups; by dividing the layers, the loaded data parameters can be conveniently adjusted on the BIMiserver platform, and the browsing effect of the platform is improved.
Before exporting IFC2x3 standard file, in order to facilitate the conversion of subsequent data format to better position the real geographical position of the tunnel main body structural steel bar model and filter the redundant model, the center point coordinate of the tunnel main body structural steel bar model is set to be (0, 0, 0), the model unit is set to be mm, and only the steel bar model is selected by the filter element.
And 3, analyzing the mapping relation between the IFC2x3 standard file and the DGN file, and establishing data mapping between the IFC2x3 standard file and the DGN file.
Analyzing the structural frames of the IFC2x3 standard file and the DGN file, as shown in FIG. 3, splitting the IFC2x3 standard file into space information of a tunnel main body structural steel bar model and geometric expression information, material information and characteristic information of the tunnel main body structural steel bars; the space information refers to a space position coordinate system and coordinate information of a tunnel main body structure steel bar model, the geometric expression information comprises the diameter, the length, the height, the hook angle and the hook length of the tunnel main body structure steel bar, the material information refers to the type of the steel bar used by the tunnel main body structure steel bar, and the characteristic information refers to the type and the identifier of the tunnel main body structure steel bar. In this embodiment, the IFC2x3 standard file is opened by IFCViewer software, and the IFC2x3 standard file architecture of the tunnel main body structural steel bar model is read.
As shown in fig. 4, the DGN file is divided into geometric characteristics, material information, comprehensive information, extension information and identity information, the geometric characteristics include the volume and surface area of the tunnel main body structural steel bar model and the size of the tunnel main body structural steel bar, the material information refers to the connection material, distribution material and surface material of the tunnel main body structural steel bar model, the comprehensive information refers to the description, unit name, unit type and element of the tunnel main body structural steel bar model, the extension information refers to the creation time, modification time, model type and ACS coordinate of the tunnel main body structural steel bar, and the identity information refers to the identifier of the tunnel main body structural steel bar; according to FIG. 5, the partial data of the IFC2x3 standard file and the DGN file are corresponded; and reconstructing the semantics of the IFC2x3 standard file and the DGN file according to the graph shown in FIG. 5, and establishing a data mapping between the IFC2x3 standard file and the DGN file.
Planbar is used as software for efficiently and quickly creating a model of a 3D reinforcing steel bar and is quickly popularized in the field of traffic infrastructure, but at present, a path from an IFC2x3 data format to a BIMiserver platform display is not available, in order to achieve the purpose, an IFC2x3 standard file needs to be converted into a DGN file, and the DGN file is convenient for modifying the model of the reinforcing steel bar of the main structure of the tunnel and endowing corresponding information.
And 4, converting the IFC2x3 file model of the tunnel main body structural steel bar into a DGN file by using a data interface.
According to the data mapping between the IFC2x3 standard file and the DGN file in step 3, developing a data interface in an extension tool MDL (Microstation Development Language) of Microstation, and converting the IFC2x3 standard file of the tunnel main body structural steel bar into the DGN file by using the data interface, and then obtaining a DGN file of the tunnel main body structural steel bar, as shown in fig. 6; a few major MDL functions are listed that are used: create element mdlXXX _ create, geometry operation mdlVec _ XXX, coordinate transformation mdlCurrTrans _ translateXXX, get connection data XAttributes (XXX), and model operation mdlModelRef _ XXX.
And 5, setting a conversion parameter by using a plug-in of the Microstation software, so that the DGN file generates the UDBX file.
Using Microstation software to open the DGN file of the tunnel main structure steel bar, as shown in fig. 7, inputting the required transformation parameters in the plug-in, such as: selecting spherical coordinates, setting insertion point coordinates: the longitude value is as follows: 120.7957985 °, latitude value: 31.37554631 ° and height values: 44m, designing origin coordinates (70953.59461, 51576.69257, 4.276049866), projecting coordinates WGS84, selecting a split-map-level export, and finally obtaining the UDBX file.
Because the file in the S3M format cannot be directly obtained from the DGN format, the DGN file needs to be converted into the UDBX file first, and then the UDBX file is converted into the S3M file to be loaded on the BIMiserver platform. The UDBX file has the characteristics of cross-platform performance, light weight and operation stability, and when the DGN file is converted into the UDBX file, the tunnel main body structure steel bar model is positioned in a world coordinate system, so that the real geographic position of the tunnel main body structure steel bar model is ensured; the UDBX file of the tunnel main body structure steel bar model can be subjected to lightweight processing in SuperMap iDesktop software, the efficient browsing effect is guaranteed, the attribute information of the tunnel main body structure steel bar model can be operated, and redundant data can be removed.
And 6, extracting the attribute information of the main structural steel bar of the tunnel by using SuperMap iDesktop, and enabling the UDBX file to generate a tile data S3M file.
Using SuperMap iDesktop software to open a UDBX file of the main structure steel bar of the tunnel, extracting attribute information of a model of the main structure steel bar of the tunnel, wherein the attribute information comprises the volume, the surface area, the length, the diameter, the layer and the engineering quantity of the main structure steel bar of the tunnel, and then storing the attribute information of the main structure steel bar of the tunnel as a Prop data set; the UDBX file is generated into a tile data S3M file by employing an octree pyramid index and DXT texture compression format.
In order to view the engineering quantity of the main structural steel bar of the tunnel while browsing the model by the BIMiServer platform, the attribute information of the main structural steel bar of the tunnel needs to be extracted, and the BIMiServer platform automatically reads corresponding information according to the field of the attribute information; the tunnel main body structure steel bar model has large data volume, is directly loaded on a BIMiServer platform to cause poor user experience, and adopts octree pyramid index and DXT texture compression format to carry out lightweight processing, thereby improving the loading speed; the tile data set S3M file is adopted for loading, so that the tunnel main body structure steel bar model can be loaded on the BIMiServe platform in a hierarchical mode, and the pressure of a computer system for processing data is reduced.
And 7, visually displaying the tunnel main body structure steel bar model of the tile data S3M file on a BIMiServer platform, and checking the steel bar model and the engineering quantity information thereof.
Loading data of a tunnel main body structure steel bar model S3M on a BIMiServer platform, and setting parameters of a minimum visible distance, a maximum visible distance, a minimum visible height, a maximum visible height and a visible size (pixel) of the tunnel main body structure steel bar according to a model layer; and checking the measurement information of the main structural steel bars of the tunnel, determining the resource allocation of the model of the far and near scene in the display environment by setting parameters, reducing the detail degree of the non-important model, and realizing the high-efficiency browsing of the model. As shown in fig. 8, the BIM construction management platform in fig. 8 is a BIMiServer platform, which is a platform known in the art, and for example, a SuperMap itclient 3D for WebGL three-dimensional client development platform developed by supergraph corporation may be used.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (8)
1. A BIM-based tunnel main body structural reinforcement IFC2x3 data visualization method is characterized by comprising the following steps:
step 1, creating a tunnel main body structure steel bar model drawing file according to a tunnel main body structure steel bar two-dimensional CAD drawing;
step 2, exporting an IFC2x3 standard file from the tunnel main body structure steel bar model drawing file according to the layer;
step 3, analyzing the mapping relation between the IFC2x3 standard file and the DGN file, and establishing data mapping between the IFC2x3 standard file and the DGN file;
step 4, converting the IFC2x3 standard file into a DGN file by using a data interface according to the data mapping established in the step 3;
step 5, setting conversion parameters by using a plug-in of the Microstation software, and converting the DGN file into the UDBX file;
step 6, extracting attribute information of the tunnel main body structure steel bar model from the UDBX file by using SuperMap iDesktop software, and converting the UDBX file into a tile data S3M file;
and 7, visually displaying the tunnel main body structure steel bar model of the tile data S3M file on a BIMiServer platform, and checking the steel bar model and the engineering quantity information thereof.
2. The BIM-based tunnel body structure steel IFC2x3 data visualization method according to claim 1, wherein the tunnel body structure steel bar model drawing file of step 1 is a file created from a two-dimensional CAD drawing by using a Planbar software, and the drawing file comprises an information file and a model file, wherein the model file comprises a three-dimensional model of the tunnel body structure steel bar, and the information file comprises the geometric size and the position of the three-dimensional model of the tunnel body structure steel bar.
3. The BIM-based tunnel body structural reinforcement IFC2x3 data visualization method according to claim 1, wherein the specific process of the step 2 is as follows:
2.1, classifying the drawing files of the tunnel main body structure steel bar model in the step 1 according to steel bar types, wherein each type is called a layer; the types of the steel bars comprise straight steel bars, straight steel bars with hooks, diagonal draw bars and stirrups;
2.2, setting the coordinates of the central point of the steel bar model of the tunnel main body structure as (0, 0, 0), setting the model unit as mm and only selecting the steel bar model by using filtering elements;
2.3, exporting the IFC2x3 standard file according to the type of the steel bar by a map layer.
4. The method for visualizing the data of the BIM-based tunnel body structural steel IFC2x3 in the claim 1, wherein the specific process of the step 3 is as follows:
3.1, analyzing the IFC2x3 standard file, and splitting the IFC2x3 standard file into space information of a tunnel main body structural steel bar model and geometric expression information, material information and characteristic information of the tunnel main body structural steel bar; the spatial information refers to a spatial position coordinate system and coordinate information of a tunnel main body structure steel bar model, the geometric expression information comprises the diameter, the length, the height, the hook angle and the hook length of the tunnel main body structure steel bar, the material information refers to the type of the steel bar used by the tunnel main body structure steel bar, and the characteristic information refers to the type and the identifier of the tunnel main body structure steel bar;
3.2, analyzing the DGN file, and splitting the model attribute of the DGN file into geometric characteristics, material information, comprehensive information, extension information and identity information; the geometric characteristics comprise the volume and the surface area of the tunnel main body structure steel bar model and the size of the tunnel main body structure steel bar model, the material information refers to the connection material, the distribution material and the surface material of the tunnel main body structure steel bar model, the comprehensive information refers to the description, the unit name, the unit type and the elements of the tunnel main body structure steel bar model, the extension information refers to the creation time, the modification time, the model type and the ACS coordinate of the tunnel main body structure steel bar, and the identity information refers to the identifier of the tunnel main body structure steel bar;
3.3, reconstructing the semantics of the IFC2x3 standard file and the DGN file on the basis of 3.1 and 3.2, and establishing a data mapping between the IFC2x3 standard file and the DGN file.
5. The BIM-based data visualization method for tunnel body construction steel IFC2x3 according to claim 1, wherein the data interface of step 4 is a data interface developed by using an extension tool MDL of Microstation according to the data mapping between IFC2x3 standard file and DGN file established in step 3.
6. The method for visualizing the data of the BIM-based tunnel body structural steel IFC2x3 in the claim 1, wherein the specific process of the step 5 is as follows:
using Microstation software to open a DGN file of a tunnel main body structure steel bar model, and inputting conversion parameters of the tunnel main body structure steel bar model into a model export plug-in, wherein the model export plug-in is a SuperMap plug-in for converting the DGN file into a UDBX file; the conversion parameters are used for determining the real geographical position of the tunnel main body structure steel bar model and comprise an origin point coordinate, an insertion point coordinate, a coordinate system and a derived element type; and selecting a sub-map layer to export to obtain a UDBX file of the main body structure steel bar model of the tunnel.
7. The method for visualizing the data of the BIM-based tunnel body structural steel IFC2x3 in the claim 1, wherein the specific process of the step 6 is as follows:
using SuperMap iDesktop software to open a UDBX file of a main body structure steel bar model of the tunnel, extracting attribute information of the main body structure steel bar model of the tunnel, wherein the attribute information comprises the volume, the surface area, the length, the diameter, the layer and the engineering quantity of the main body structure steel bar of the tunnel, and storing the attribute information of the main body structure steel bar model of the tunnel as a Prop data set; and converting the UDBX file of the tunnel main body structural steel bar model into a tile data set S3M file by adopting an octree pyramid index and a DXT texture compression format.
8. The method for visualizing the data of the BIM-based tunnel body structural steel IFC2x3 in the claim 1, wherein the specific process of the step 7 is as follows:
loading a tunnel main body structure steel bar model tile data S3M file on a BIMiServer platform, and setting parameters of a minimum visible distance, a maximum visible distance, a minimum visible height, a maximum visible height and a visible size of a tunnel main body structure steel bar according to a model layer; and checking the metering information of the main structural steel bars of the tunnel.
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