CN112560154A - Highway tunnel engineering BIM model dynamic creation method based on Unity platform - Google Patents
Highway tunnel engineering BIM model dynamic creation method based on Unity platform Download PDFInfo
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Abstract
The invention discloses a BIM (building information modeling) model dynamic creating method for highway tunnel engineering based on a Unity platform, which comprises the steps of firstly, importing route design line horizontal and vertical information and key pile number information of tunnel engineering based on a route file; then reading geological survey data, importing surrounding rock grades and descriptions, lining the model, and segmenting the tunnel; then, creating a supporting component scheme based on the composite lining general design drawing; then, designing a hole body; then designing a lining, a hole door and a communication channel; the method can more clearly and intuitively display the design scheme of the highway tunnel engineering through a three-dimensional visualization mode, realize the dynamic interaction between the input design parameters and the creation of the tunnel engineering model, reflect the design concept of designers in real time and effectively improve the BIM modeling efficiency of the tunnel engineering.
Description
Technical Field
The invention relates to the field of dynamic parameterization creation of a highway tunnel engineering information model, in particular to a highway tunnel engineering BIM model dynamic creation method based on a Unity platform.
Background
At present, three platforms for bearing the BIM technology at home and abroad are mainly used, namely, Autodesk, Bentley and Dassault platforms, the thinking of establishing the model by the three platforms is mainly manual establishment, and the establishment efficiency of the model is improved by a basic component model in an auxiliary mode. The field of highway tunnel engineering lacks a tool for creating BIM models in batches by parameterization, the modeling efficiency is not high, and a system cannot match a composite lining structure for a tunnel section according to the surrounding rock grade; the system cannot locate the coordinates of the contact channel according to its stake number and place the three-dimensional model of the contact channel and automatically remove the intersecting overlap. The tunnel engineering is an important component of a mountain expressway project, the manual modeling workload is heavy, and the research of the dynamic building method of the BIM model of the highway tunnel engineering is helpful for promoting the technical progress of the industry and improving the overall building efficiency of the BIM model of the highway engineering.
Disclosure of Invention
The method can more clearly and intuitively display the design scheme of the highway tunnel engineering through a three-dimensional visualization mode, realize the dynamic interaction between the input design parameters and the creation of the tunnel engineering model, reflect the design concept of designers in real time and effectively improve the BIM modeling efficiency of the tunnel engineering.
In order to achieve the purpose, the invention adopts the following technical measures:
1. a highway tunnel engineering BIM model dynamic establishing method based on a Unity platform is characterized by comprising the following steps:
s1, importing the horizontal and vertical information of the route design line and the key stake number information of the tunnel project based on the route file, the key pile number information comprises the pile number of a tunnel starting and finishing point portal, the pile number of a starting and finishing point open cut tunnel, a tunnel section change point, a tunnel geological condition change demarcation point, a starting and finishing point of an emergency stop zone created along the tunnel according to the design principle of the tunnel, the pile number position of a transverse hole arranged on the emergency stop zone, and the pile number of a communication channel, used for describing tunnel design schemes in different interval paragraph ranges, analyzing a route file, reading a design line list under the route file, obtaining a design line Guid where the current tunnel is located, resolving the engineering coordinate according to the key pile number information, converting the engineering coordinate moving and combining origin point into the coordinate of the tunnel available in the three-dimensional space, fitting each pile number coordinate point in the three-dimensional space to form a three-dimensional curve for determining the three-dimensional space position of the tunnel; the information stored in the route file is data collected from a ground line, and the route information of the tunnel, namely the design linear shapes of the top plan and the vertical section displayed in the three-dimensional space during tunnel design, forms pile-by-pile coordinate data through interpolation calculation; the pile number coordinate point is the unique identification of each control point in the route information of the tunnel, the pile number coordinate point is the coordinate point converted by arranging the position data of the design stage into an Excel table form for storage and converting the pile number information corresponding to each position after the pile number coordinate point is imported,
s2, reading geological survey data, segmenting a tunnel in a three-dimensional space through an engineering geological survey report, forming a tunnel segmentation table, determining the surrounding rock grade of each section of tunnel, describing the geological condition of each section according to the details of the surrounding rock, wherein the description comprises surrounding rock grade description and excavation mode description, simultaneously drawing a two-dimensional longitudinal surface design drawing of the tunnel, wherein the two-dimensional longitudinal surface design drawing comprises the integral design line distribution condition and the ground line trend of the tunnel, drawing a separation line to represent the surrounding rock segmentation condition, facilitating checking the elevation and the tunnel burial depth of the comparison design line and the ground line, and storing data before and after a user adjusts the tunnel segmentation according to the comparison condition;
s3, creating a three-dimensional model comprising anchor rods, steel arch frames, reinforcing meshes and a concrete structure based on the composite lining general design drawing, correcting three-dimensional model data according to the grade of the surrounding rock in the tunnel segmentation table, and storing the three-dimensional model data in a composite lining library corresponding to the grade of the surrounding rock in a classified manner; the combined type lining general design drawing is that in the stage of tunnel design, a general engineering design scheme is formed by a primary support structure and a secondary lining structure which are required by tunnel construction under different surrounding rock grades, and the design scheme is stored in a combined type lining general design library in a parameterized form; the process of creating the three-dimensional model comprises the steps of calling attribute parameters of the anchor rod, the steel arch frame, the reinforcing mesh and the concrete structure from the composite lining universal library, describing the positions and the styles of the anchor rod, the steel arch frame, the reinforcing mesh and the concrete structure in a three-dimensional space according to the attribute parameters, and creating the three-dimensional model;
s4, designing a tunnel body, wherein the tunnel body is divided into a standard section and a widened section provided with an emergency stop belt, the standard section is a main tunnel body of the tunnel, the section form of the inner contour of the main tunnel body is mainly divided into a three-center circle and a single-center circle according to the specification of the design of the highway tunnel, the inner contour of the emergency stop belt is mainly a three-center circle, a tunnel body design drawing is led in, the design attribute parameters of the single-center circle structure and the internal construction limit thereof or the three-center circle structure and the internal construction limit thereof in the tunnel body design drawing are extracted, the section form of the inner contour of the main tunnel body is selected according to the construction limit design parameters of the inner contour of the tunnel body, so as to realize drawing a parameterized tunnel body section drawing, namely, a user inputs each design attribute parameter, the coordinate of each point on the section is calculated by using the design attribute parameters, then points are connected, the two-dimensional drawing of the tunnel body section is drawn, and the tunnel body, generating a three-dimensional model at the corresponding route position;
wherein, the selection of the section form of the inner contour of the main cave body comprises the following steps,
g1, inputting design parameters of building boundary;
g2, judging the circle is a three-center circle or a single-center circle: the number of the circle centers of the cross section is WWidth of building boundary/WStandard lane width；
G3, matching a set of section forms that the total width of the inner contour of the main tunnel body is larger than the total width of the building boundary according to the design data of the standard section general diagram of the tunnel in the highway tunnel design specification;
s5, displaying the position of a dividing line of the surrounding rock segment in a tunnel longitudinal surface design drawing, taking the position of a tunnel pile number adjacent to the dividing line as a starting point and an end point of the tunnel surrounding rock segment, calculating the detailed position of each tunnel surrounding rock segment by taking the size of the tunnel surrounding rock segment in the current tunnel longitudinal surface design drawing as a standard, simultaneously preliminarily obtaining the tunnel surrounding rock segment condition according to the geological survey process, matching a default composite lining scheme by extracting the surrounding rock grade and buried depth data of each section, and establishing a three-dimensional model of a primary support structure and a secondary lining structure matched with the section form along the periphery of the inner contour of a tunnel body of the tunnel surrounding rock segment;
and S6, extracting design parameters from the end wall body of the end wall type tunnel portal according to the design drawing, and extracting design parameters from the ring frame type tunnel portal to create a tunnel portal three-dimensional appearance model according to the position of the tunnel portal.
S7, according to the pile number of the connection channel, extracting the pile number space coordinate of the connection channel, positioning the placement position of the connection channel, extracting the design parameters of the straight wall curved top section and the building limit of the cross tunnel according to the inner contour pattern of the cross tunnel, generating the three-dimensional appearance model of the primary support secondary lining concrete, the anchor rod and the steel arch based on the inner contour patterns of the plurality of transverse connection channels according to the pile number space coordinate, and performing difference set operation based on Boolean operation to realize the optimization of the connecting part model of the main tunnel body and the model transverse connection channel of the connected tunnel.
The main differences of the invention are:
1. step S2 realizes dynamic adjustment of each segment after importing the initial segmentation result in the design file. The adjustment process comprises the steps of comparing the ground elevation and the design elevation of the tunnel and taking the actual grade division of the surrounding rocks as a reference basis. The data before and after adjustment support the storage of records; the formed tunnel longitudinal section design drawing is a basis for stretching the tunnel body section along the tunnel route in the step S4 to generate a three-dimensional model, and the function of automatically matching the tunnel body composite lining structure scheme according to the tunnel longitudinal section design drawing is realized.
2. Step S3, classifying the three-dimensional model data according to the surrounding rock grade in the tunnel segmentation table and storing the three-dimensional model data in a composite lining library corresponding to the surrounding rock grade, so that a set of supporting scheme matched with the three-dimensional model data is recommended according to the surrounding rock grade and the surrounding rock detail of each tunnel segmentation in step S5, and therefore the method is different from the method that the existing system generates each segment composite lining model based on a standard section, and generates the model along the actual section according to the actual type of the section, such as a single-center circle, a three-center circle and the actual design parameter of the section, and the generated model is directly attached to the tunnel model, so that the method is more accurate and easy to check;
3. in step S7, the system creates an algorithm for generating the primary support secondary lining concrete, anchor rods and steel arch centering based on the cross section form of the communication channel. And the linkage change is also carried out according to the cross section design data of the communication channel.
Drawings
FIG. 1 is a block diagram of a dynamic building method of a BIM model of a highway tunnel engineering based on a Unity platform;
FIG. 2 is an Excel table organized by the position data of the design stage in step S2 according to the present invention;
FIG. 3 is a system interface diagram after step S1 of the present invention is executed;
FIG. 4 is a system interface diagram after step S2 of the present invention is executed;
FIG. 5 is a system interface diagram after step S3 of the present invention is executed;
FIG. 6 is a system interface diagram after step S4 of the present invention is executed;
FIG. 7 is a system interface diagram after step S4 of the present invention is executed;
FIG. 8 is a system interface diagram after step S5 of the present invention is executed;
FIG. 9 is a system interface diagram after step S6 of the present invention is executed;
FIG. 10 is a system interface diagram after step S7 of the present invention is executed.
Detailed Description
Example 1:
as shown in fig. 1, the invention relates to a dynamic creation method of a highway tunnel engineering BIM model based on a Unity platform. The method mainly comprises the following steps in the process of establishing the tunnel model:
s1, importing route information and key stake number information of a tunnel based on a route file, analyzing the route file, reading a design line list under the route file, obtaining a design line Guid where the current tunnel is located, wherein the design line Guid is a main key of each design line obtained from a route database file and is a unique identifier of the design line generated through a series of coding modes, analyzing an engineering coordinate according to the key stake number information, converting an engineering coordinate moving and combining origin into a coordinate which can be used by the tunnel in a three-dimensional space, and fitting each stake number coordinate point in the three-dimensional space to form a three-dimensional curve so as to determine the three-dimensional space position of the tunnel; the information stored in the route file is data collected from natural landform features, the route information of the tunnel, that is, the design line shapes of the top plan and the vertical section displayed in the three-dimensional space during tunnel design, forms pile-by-pile coordinate data through interpolation calculation, as shown in fig. 2.
The step of converting the pile number information corresponding to each position into a coordinate point in a three-dimensional space after the importing is as follows:
the first step is as follows: and (5) corresponding the pile number of the character face to a design line where the pile number is located, and analyzing the engineering coordinate of the pile number through a route database.
The second step is that: the engineering coordinates are converted into local coordinates suitable for the cost platform, namely, each step of establishing, a fixed offset value is subtracted from the position coordinates of the model, and the model is ensured to be close to the origin.
The key pile number information comprises a pile number of a tunnel starting and finishing point tunnel door, a pile number of a starting and finishing point open cut tunnel, a tunnel section change point, a tunnel geological condition change demarcation point, a starting and finishing point of an emergency stop zone created along a tunnel according to a tunnel design principle, a pile number position of a transverse hole arranged on the emergency stop zone, and a pile number of a communication channel, and is used for describing tunnel design schemes in different interval section ranges; as in fig. 3, route information C is imported: sbb, the key stake number information includes a starting stake number YK47+161, an end stake number YK52+383, an entrance tunnel door starting stake number YK47+161, an entrance open tunnel starting stake number YK47+162, an entrance open tunnel end stake number YK47+170, an exit tunnel door starting stake number YK52+383, an exit open tunnel starting stake number YK52+382.9, and an exit open tunnel end stake number YK52+382.5, wherein YK47+161 represents a position on a YK design line at a distance of 47161 meters from the design line starting point.
S2, reading geological survey data, segmenting the tunnels in the three-dimensional space to form a tunnel segmentation table through an engineering geological survey report, determining the surrounding rock grade of each section of tunnel as shown in figure 4, wherein the surrounding rock grade is a plurality of categories divided according to the hardness degree and integrity of the surrounding rock, and is used for evaluating the surrounding rock property and judging the stability of the surrounding rock of the tunnel and used as a basis for selecting the position and the support type of the tunnel and guiding safety construction. According to the details of the surrounding rocks, performing geological condition description including surrounding rock grade description and excavation mode description on each section, and simultaneously drawing a tunnel longitudinal surface design drawing, such as a figure 4, including the overall design line distribution condition and the ground line trend of the tunnel, wherein the separation line represents the segmentation condition of the surrounding rocks, so that the elevation and the tunnel burial depth of the design line and the ground line are conveniently checked and compared, and data before and after the user adjusts the tunnel segmentation according to the comparison condition are stored;
the separation line effect is shown in fig. 4, the initial pile number of each paragraph in the imported surrounding rock segmentation table is read, and the end pile number of the paragraph is used as the reference position of the separation line.
The first step is as follows: the width of the panel per meter is determined as the total length of the panel divided by the total length of the tunnel.
The second step is that: converting the end point stake number and the tunnel starting point stake number of each paragraph into continuous stake numbers (for example, ZK96+310 is converted into 96310), and subtracting the two numerical values to obtain the length of the current paragraph from the tunnel starting point.
The third step: and multiplying the actual distance length obtained in the second step by the step length per meter of the panel obtained in the first step to calculate the position of the current paragraph, namely the separation line, on the panel.
S3, creating a three-dimensional model comprising anchor rods, steel arch frames, reinforcing meshes and a concrete structure based on the composite lining general design drawing, correcting three-dimensional model data according to the grade of the surrounding rock in the tunnel segmentation table, and storing the three-dimensional model data in a composite lining library corresponding to the grade of the surrounding rock in a classified manner;
the combined type lining general design drawing is that in the stage of tunnel design, a primary support structure and a secondary lining structure which are required to be used for tunnel construction under different surrounding rock grades form a general engineering design scheme, and the design scheme is stored in a combined type lining general design library in a parameterized form; the process of creating the three-dimensional model comprises the steps of calling attribute parameters of the anchor rod, the steel arch frame, the reinforcing mesh and the concrete structure from the composite lining universal library, describing the positions and the styles of the anchor rod, the steel arch frame, the reinforcing mesh and the concrete structure in a three-dimensional space according to the attribute parameters, and finally creating the three-dimensional model;
referring to fig. 5, the naming of the composite lining structure supporting scheme and the selection of the component attributes are closely related to the grade of the surrounding rock, for example, the naming of the supporting scheme adopted under the grade-iii surrounding rock needs to include the character "iii", and the adopted lining may not include the anchor rod. The management of the composite lining storehouse depends on the principle to ensure the normal use of the subsequent functions. Error cues may occur for schemes that are not properly named.
S4, designing a tunnel body, wherein the tunnel body is divided into a standard section and a widened section provided with an emergency stop zone, the standard section is a main tunnel body of the tunnel, the section form of the inner contour of the main tunnel body is mainly divided into a three-core circle and a single-core circle according to the specification of the design of the highway tunnel, the inner contour of the main tunnel body of the emergency stop zone is mainly the three-core circle, a tunnel body design drawing is led in, the design attribute parameters of the single-core circle structure and the internal building limit thereof, the three-core circle structure and the internal building limit thereof in the tunnel body design drawing are extracted, the section form of the inner contour of the main tunnel body is selected according to the building limit design parameters of the tunnel body, the drawing of a parameterized tunnel body section drawing is realized, and the tunnel body section is stretched along a tunnel route to generate a three-dimensional model;
the stretching is carried out according to the following steps
First, a two-dimensional plane of line closure is created as in fig. 6, which defines the cross-sectional pattern of the stretched body.
Next, a continuous stretch curve is created as in FIG. 7.
And finally, stretching the two-dimensional plane along a curve to form a tunnel three-dimensional entity.
And S5, dynamically displaying the tunnel vertical section design drawing reflecting different surrounding rock grades in the user interface. Displaying the position of the dividing line of the surrounding rock subsection in a tunnel longitudinal surface design drawing, wherein the pile number position adjacent to the dividing line represents the starting point and the end point of the tunnel section (explained in step S2), and matching a preset supporting scheme according to the surrounding rock grade of the tunnel surrounding rock subsection, and the method specifically comprises the following steps:
the first step is as follows: and obtaining the surrounding rock grade of each tunnel segment through user editing, namely modifying, deleting and adding the surrounding rock segment table.
The second step is that: the system reads the stored support scheme of the current tunnel.
The third step: and matching the type of the supporting scheme through the grade type according to the grade of the surrounding rock of each section. If a plurality of sets of supporting schemes exist under the surrounding rock grade, one set of supporting schemes can be randomly selected and recommended to the section.
Then, a three-dimensional model of a primary support structure and a secondary lining structure matched with the section form of the tunnel body inner contour of the tunnel surrounding rock subsection is established along the periphery of the tunnel body inner contour, and the three-dimensional model is shown in figure 8;
s6, extracting design parameters from the end wall body of the end wall type tunnel portal according to a design drawing, extracting design parameters from the ring frame type tunnel portal, and creating a tunnel portal three-dimensional appearance model according to the position of the tunnel portal, as shown in figure 9.
S7, extracting peg number spatial coordinates of the contact channel according to the peg number of the contact channel, as the first step of fig. 10: pile numbers at two ends of the communication channel are respectively placed on the two design lines and are firstly matched with the design lines corresponding to the pile numbers at the end points of the tunnel.
The second step is that: and inquiring the engineering coordinates of the pile number through a route database, and subtracting the offset value from the three-dimensional platform to move to the original point.
The third step: only the coordinates of the starting point and the ending point of the communication channel are used, the longitudinal distance of the anchor rod is used as the step length to determine the distance between the tunnel route points, and the coordinates of each point are calculated according to the coordinates of the two ends to form a passage of the communication channel.
The method comprises the steps of positioning the placement positions of the communication channels, extracting design parameters of a straight wall curved top section and a building clearance of the straight wall curved top section of the cross tunnel according to an inner contour pattern of the cross tunnel, generating a three-dimensional appearance model of a primary support secondary lining concrete, an anchor rod and a steel arch based on the inner contour patterns of a plurality of transverse communication channels according to a pile number space coordinate, and optimizing a connection part model of a main tunnel body and a model transverse communication channel of the connected tunnel based on Boolean operation difference set operation.
The Boolean operation of the function is based on the realization of the three-dimensional platform.
The first step, will contact the passageway and place the corresponding position in tunnel, the both ends of passageway all distribute on the tunnel hole is one's body.
And secondly, generating a section of solid hole body model at the part where the channel is connected with the hole body.
And thirdly, taking the intersection part of the solid model and the communication channel, and subtracting the intersection part of the solid model and the communication channel model to obtain the finally obtained model.
The model intersection and difference calculation are carried out in a three-dimensional platform, and processed points, lines and triangular surfaces are obtained again according to a grid generation mechanism of the three-dimensional model to form an entity.
Claims (1)
1. A highway tunnel engineering BIM model dynamic establishing method based on a Unity platform is characterized by comprising the following steps:
s1, importing the horizontal and vertical information of the route design line and the key stake number information of the tunnel project based on the route file, the key pile number information comprises the pile number of a tunnel starting and finishing point portal, the pile number of a starting and finishing point open cut tunnel, a tunnel section change point, a tunnel geological condition change demarcation point, a starting and finishing point of an emergency stop zone created along the tunnel according to the design principle of the tunnel, the pile number position of a transverse hole arranged on the emergency stop zone, and the pile number of a communication channel, used for describing tunnel design schemes in different interval paragraph ranges, analyzing a route file, reading a design line list under the route file, obtaining a design line Guid where the current tunnel is located, resolving the engineering coordinate according to the key pile number information, converting the engineering coordinate moving and combining origin point into the coordinate of the tunnel available in the three-dimensional space, fitting each pile number coordinate point in the three-dimensional space to form a three-dimensional curve for determining the three-dimensional space position of the tunnel; the information stored in the route file is data collected from a ground line, and the route information of the tunnel, namely the design linear shapes of the top plan and the vertical section displayed in the three-dimensional space during tunnel design, forms pile-by-pile coordinate data through interpolation calculation; the pile number coordinate point is the unique identification of each control point in the route information of the tunnel, the pile number coordinate point is the coordinate point converted by arranging the position data of the design stage into an Excel table form for storage and converting the pile number information corresponding to each position after the pile number coordinate point is imported,
s2, reading geological survey data, segmenting a tunnel in a three-dimensional space through an engineering geological survey report, forming a tunnel segmentation table, determining the surrounding rock grade of each section of tunnel, describing the geological condition of each section according to the details of the surrounding rock, wherein the description comprises surrounding rock grade description and excavation mode description, simultaneously drawing a two-dimensional longitudinal surface design drawing of the tunnel, wherein the two-dimensional longitudinal surface design drawing comprises the integral design line distribution condition and the ground line trend of the tunnel, drawing a separation line to represent the surrounding rock segmentation condition, facilitating checking the elevation and the tunnel burial depth of the comparison design line and the ground line, and storing data before and after a user adjusts the tunnel segmentation according to the comparison condition;
s3, creating a three-dimensional model comprising anchor rods, steel arch frames, reinforcing meshes and a concrete structure based on the composite lining general design drawing, correcting three-dimensional model data according to the grade of the surrounding rock in the tunnel segmentation table, and storing the three-dimensional model data in a composite lining library corresponding to the grade of the surrounding rock in a classified manner; the combined type lining general design drawing is that in the stage of tunnel design, a general engineering design scheme is formed by a primary support structure and a secondary lining structure which are required by tunnel construction under different surrounding rock grades, and the design scheme is stored in a combined type lining general design library in a parameterized form; the process of creating the three-dimensional model comprises the steps of calling attribute parameters of the anchor rod, the steel arch frame, the reinforcing mesh and the concrete structure from the composite lining universal library, describing the positions and the styles of the anchor rod, the steel arch frame, the reinforcing mesh and the concrete structure in a three-dimensional space according to the attribute parameters, and creating the three-dimensional model;
s4, designing a tunnel body, wherein the tunnel body is divided into a standard section and a widened section provided with an emergency stop belt, the standard section is a main tunnel body of the tunnel, the section form of the inner contour of the main tunnel body is mainly divided into a three-center circle and a single-center circle according to the specification of the design of the highway tunnel, the inner contour of the emergency stop belt is mainly a three-center circle, a tunnel body design drawing is led in, the design attribute parameters of the single-center circle structure and the internal construction limit thereof or the three-center circle structure and the internal construction limit thereof in the tunnel body design drawing are extracted, the section form of the inner contour of the main tunnel body is selected according to the construction limit design parameters of the inner contour of the tunnel body, so as to realize drawing a parameterized tunnel body section drawing, namely, a user inputs each design attribute parameter, the coordinate of each point on the section is calculated by using the design attribute parameters, then points are connected, the two-dimensional drawing of the tunnel body section is drawn, and the tunnel body, generating a three-dimensional model at the corresponding route position;
wherein, the selection of the section form of the inner contour of the main cave body comprises the following steps,
g1, inputting design parameters of building boundary;
g2, judging the circle is a three-center circle or a single-center circle: the number of the circle centers of the cross section is WWidth of building boundary/WStandard lane width；
G3, matching a set of section forms of the main tunnel body with the total width of the inner contour of the main tunnel body being more than or equal to the total width of the building boundary according to the design data of the standard section general diagram of the tunnel in the highway tunnel design specification;
s5, displaying the position of a dividing line of the surrounding rock segment in a tunnel longitudinal plane design drawing, taking the position of a tunnel pile number adjacent to the dividing line as a starting point and an end point of the tunnel surrounding rock segment, calculating the detailed position of each tunnel surrounding rock segment by taking the size of the tunnel surrounding rock segment in the current tunnel longitudinal plane design drawing as a standard, simultaneously preliminarily obtaining the tunnel surrounding rock segment condition according to the geological survey process, matching a default composite lining scheme by extracting the surrounding rock grade and buried depth data of each segment, and establishing a three-dimensional model of a primary support structure and a secondary lining structure matched with the section form along the periphery of the inner contour of the tunnel body of the tunnel surrounding rock segment;
and S6, extracting design parameters from the end wall body of the end wall type tunnel portal according to the design drawing, and extracting design parameters from the ring frame type tunnel portal to create a tunnel portal three-dimensional appearance model according to the position of the tunnel portal.
S7, according to the pile number of the connection channel, extracting the pile number space coordinate of the connection channel, positioning the placement position of the connection channel, extracting the design parameters of the straight wall curved top section and the building limit of the cross tunnel according to the inner contour pattern of the cross tunnel, generating the three-dimensional appearance model of the primary support secondary lining concrete, the anchor rod and the steel arch based on the inner contour patterns of the plurality of transverse connection channels according to the pile number space coordinate, and performing difference set operation based on Boolean operation to realize the optimization of the connecting part model of the main tunnel body and the model transverse connection channel of the connected tunnel.
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