CN106777779B - Railway culvert design method based on BIM - Google Patents
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Abstract
The invention discloses a BIM-based railway culvert design method, which comprises the following steps: generating a full-line culvert work point skeleton according to the space line position and the culvert mileage information stored in the table, establishing a culvert section template, establishing a culvert section skeleton by taking the culvert work point skeleton established in the step S1 as an input element, and instantiating the culvert section template established in the step S2 on the culvert section skeleton established in the step S3. The method realizes the whole solution of the BIM design of the railway culvert, deepens and refines the design of the railway culvert, improves the design means of the railway culvert, has high automation degree and strong practicability, can greatly improve the design efficiency and the achievement quality, and has obvious popularization and application values.
Description
Technical Field
The invention belongs to a design method of a railway culvert, and particularly relates to a design method of a railway culvert based on BIM.
Background
The building information model is a new tool for architecture, engineering and civil engineering. A Building Information Model (BIM) is defined as a building or construction information model that is composed of complete and sufficient information to support lifecycle management and can be directly interpreted by a computer application. In short, life cycle management of a building environment is supported by digital technology.
The development of the railway culvert design based on the BIM technology is the requirement of deepening and optimizing the design, the axial arrangement range of the culvert is determined according to a two-dimensional plane diagram and the directions of a road and a channel in the traditional railway culvert design, and then culvert sections are arranged according to the axial topographic sections of the culvert, which are actually measured on site. In the traditional method, the design is carried out only according to the isolated sectional diagram at the axial position of the culvert except for the two-dimensional terrain plan, the actual change condition of the field terrain cannot be fully reflected in the design result, and the method has great limitation. In the BIM design, the two-dimensional terrain plan and the culvert axial terrain section which are provided in the upper sequence are changed into three-dimensional terrain curved surfaces, and the line position is also changed into a space curve from a two-dimensional mark in the culvert axial section. On the basis, the railway culvert BIM design is developed, which is flat, longitudinal and three-dimensional collaborative culvert design developed on a three-dimensional terrain curved surface by taking a space line position as upper-order data, so that the railway culvert BIM design method is urgently needed to be researched whether the upper-order data or the design means are changed greatly.
Disclosure of Invention
The invention is provided for solving the problems in the prior art, and aims to provide a railway culvert design method based on BIM.
The technical scheme of the invention is as follows: a BIM-based railway culvert design method comprises the following steps:
and (i) generating a full-line culvert construction point skeleton according to the space line position and the mileage information of each culvert stored in the table.
(ii) establishing culvert section templates.
And (iii) establishing a culvert section skeleton by taking the culvert station skeleton established in the step (i) as an input element.
(iv) instantiating the culvert segment template created in step (ii) on the culvert segment skeleton created in step (iii).
The mileage information of each culvert in the step (i) comprises mileage values of all culvert work points of the whole line;
the culvert work point framework comprises a plurality of coordinate systems with the same number as the culvert work points, each coordinate system corresponds to one culvert work point, the origin of the coordinate system is the intersection point of the space line position and the vertical plane where the culvert axis is located, the tangential direction of the horizontal projection line of the x axis of the coordinate system is consistent with that of the space line position, and the z axis of the coordinate system is vertically upward.
Projecting the space line position in the step (i) on a horizontal plane, searching along a space line position horizontal projection line according to the difference value between each culvert mileage and the space line position starting point mileage, establishing a point at the searched position, wherein the point is the horizontal projection of the culvert working point skeleton original point, making a vertical line from the horizontal projection point to the space line position, wherein an intersection point is the culvert working point skeleton original point, making a tangent line of the space line position from the culvert working point skeleton original point, projecting the tangent line to the horizontal plane, taking the direction of the projected line as the x direction of a skeleton coordinate system, taking the vertically upward direction as the z direction of the skeleton coordinate system, obtaining the y direction of the skeleton coordinate system by cross product operation between the z direction and the x direction, traversing each culvert mileage information stored in a table, and finally generating the full-line culvert working point skeleton.
In the step (ii), the culvert section template consists of two parts, namely a three-dimensional model of the culvert main body structure and a skeleton coordinate system positioned at the end point position.
In the step (iii), the culvert section skeleton comprises a plurality of coordinate systems, the number of the coordinate systems is twice of the number of the culvert sections, and the coordinate systems serving as the culvert section skeleton correspond to the coordinate systems with two ends of each culvert section serving as input elements respectively.
The culvert section skeleton established by taking the culvert station skeleton established in the step (i) as an input element comprises the following processes: establishing a table, wherein the table stores the section size information of the culvert sections and the position information of each culvert section; firstly, according to the filling height and the culvert axis direction information stored in the table, a work point framework coordinate system is translated downwards and rotates around a z axis; according to the length of the culvert section under the space linear position and the proportion of the culvert section under the space linear position stored in the table, moving the skeleton coordinate system generated in the previous step along the culvert axis direction to generate an end skeleton coordinate system of the culvert section under the space linear position; and moving the end skeleton coordinate system of the culvert section under the spatial line position generated in the previous step along the z direction and the culvert axis direction according to the length of each culvert section, the width of the gap between each culvert section, the relative height difference of the culvert sections and the like to generate the end skeleton coordinate system of all sections of the culvert working point.
Instantiating the culvert segment template established in step (ii) on the culvert segment skeleton established in step (iii), including the following processes:
extracting an end coordinate system corresponding to each culvert section in the culvert section skeleton to serve as an input element of a culvert section template, extracting section size information stored in a data table, assigning parameters of the culvert section template, performing cyclic operation, and generating a BIM model of all culvert sections of the work point.
According to the method, mileage information and culvert section position information required in the culvert design process are respectively stored in the table based on the digital space line position, culvert work point frameworks and culvert section frameworks are generated in batches according to the information in the table, and culvert section templates are instantiated on the section frameworks, so that a full-line culvert model is generated. The method realizes the whole solution of the BIM design of the railway culvert, deepens and refines the design of the railway culvert, improves the design means of the railway culvert, has high automation degree and strong practicability, can greatly improve the design efficiency and the achievement quality, and has obvious popularization and application values.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1, a method for designing a railway culvert based on BIM includes the following steps:
and (i) generating a full-line culvert construction point skeleton S1 according to the space line position and the culvert mileage information stored in the table.
And the mileage information of each culvert comprises mileage values of all culvert work points of the whole line.
The culvert work point framework comprises a plurality of coordinate systems with the same number as the culvert work points, each coordinate system corresponds to one culvert work point, the origin of the coordinate system is the intersection point of the space line position and the vertical plane where the culvert axis is located, the tangential direction of the horizontal projection line of the x axis of the coordinate system is consistent with that of the space line position, and the z axis of the coordinate system is vertically upward.
The method for generating the full-line culvert work point skeleton according to the space line position and the mileage information of each culvert stored in the table comprises the steps of projecting the space line position on a horizontal plane, searching along a space line position horizontal projection line according to the difference value of each culvert mileage and the mileage of a space line position starting point, establishing a point at the searched position when the searched curve length is the same as the mileage difference value, wherein the point is the horizontal projection of the culvert work point skeleton original point, making the horizontal projection point as a vertical line towards the space line position, and the intersection point is the culvert work point skeleton original point. And (3) making a tangent of a space line position through the original point of the culvert work point framework, projecting the tangent to a horizontal plane, wherein the direction of the projected line is the x direction of the framework coordinate system, the vertically upward direction is the z direction of the framework coordinate system, and the y direction of the framework coordinate system is obtained through cross product operation between the z direction and the x direction. And traversing the mileage information of each culvert stored in the table, and finally generating the full-line culvert work point skeleton.
(ii) establishing a culvert section template S2.
The culvert section template consists of two parts, namely a culvert main structure three-dimensional model and a skeleton coordinate system positioned at an end point position, wherein in the main structure three-dimensional model, each important size data is opened as a parameter and can be re-assigned when the culvert section model is generated, and the skeleton coordinate system is used as a template input element for determining the spatial position and the boundary condition of the culvert section model in the instantiation process.
(iii) establishing a culvert segment skeleton S3 with the culvert station skeleton established in the step (i) as an input element.
The culvert section skeleton comprises a plurality of coordinate systems, the number of the coordinate systems is twice that of the culvert sections, and the coordinate systems serving as the culvert section skeleton correspond to the coordinate systems of two ends of each culvert section serving as input elements respectively.
The culvert section skeleton established by taking the culvert station skeleton established in the step (i) as an input element comprises the following processes: establishing a table, wherein the table stores section size information of culvert sections and position information of each culvert section, and the position information comprises the soil filling height of each culvert working point, the culvert axial direction, the length of each culvert section, the width of gaps among the culvert sections, the relative height difference of the culvert sections, the specific proportion of the culvert sections under the space line position divided by the space line position and the like; firstly, generating a positioning framework of a culvert section right below a space line position, moving a culvert working point framework coordinate system along a-z direction according to the soil filling height of the table, and rotating the culvert working point framework coordinate system around a z axis according to the culvert axis direction information of the table, so that the origin of the framework coordinate system is positioned at the upper edge of a top plate of the culvert section, and the x axis direction of the framework coordinate system is consistent with the culvert axis direction; moving the skeleton coordinate system generated in the previous step along the x-axis direction according to the length of the culvert sections under the space linear positions and the proportion of the culvert sections under the space linear positions divided by the space linear positions to generate an end skeleton coordinate system of the culvert sections under the space linear positions; and moving the end skeleton coordinate system of the culvert section under the spatial line position generated in the previous step along the z direction and the x direction according to the length of each culvert section, the width of the gap between each culvert section, the relative height difference of the culvert sections and the like to generate the end skeleton coordinate system of all sections of the culvert working point.
(iv) instantiating the culvert segment template S4 created in step (ii) on the culvert segment skeleton created in step (iii).
Extracting an end coordinate system corresponding to each culvert section in the culvert section skeleton to serve as an input element of a culvert section template, extracting section size information stored in a data table, assigning parameters of the culvert section template, performing cyclic operation, and generating a BIM model of all culvert sections of the work point.
According to the method, on the basis of digitized space line positions, mileage information and culvert segment position information required in the culvert design process are respectively stored in a table, culvert work point frameworks and culvert segment frameworks are generated in batches according to the information in the table, culvert segment templates are instantiated on the segment frameworks, and therefore a full-line culvert model is generated. The method realizes the whole solution of the BIM design of the railway culvert, deepens and refines the design of the railway culvert, improves the design means of the railway culvert, has high automation degree and strong practicability, can greatly improve the design efficiency and the achievement quality, and has obvious popularization and application values.
Claims (4)
1. A railway culvert design method based on BIM is characterized in that: the method comprises the following steps:
generating a full-line culvert construction point skeleton according to the space line position and mileage information of each culvert stored in the table; (ii) building culvert section templates;
(iii) establishing a culvert segment skeleton by taking the culvert work point skeleton established in the step (i) as an input element; establishing a table, wherein the table stores the end face size information of the culvert sections and the position information of each culvert section;
(iv) instantiating the culvert segment template established in step (ii) on the culvert segment skeleton established in step (iii);
the mileage information of each culvert in the step (i) comprises mileage values of all culvert work points of the whole line;
the culvert work point skeleton comprises a plurality of coordinate systems with the same number as the culvert work points, each coordinate system corresponds to one culvert work point, the origin of the coordinate system is the intersection point of the space line position and the vertical plane where the culvert axis is located, the tangential direction of the horizontal projection line of the x axis of the coordinate system is consistent with that of the space line position, and the z axis of the coordinate system is vertically upward; projecting the space line position in the step (i) on a horizontal plane, searching along a space line position horizontal projection line according to the difference value between each culvert mileage and the space line position starting point mileage, establishing a point at the searched position, wherein the point is the horizontal projection of the culvert working point skeleton original point, making a vertical line from the horizontal projection point to the space line position, wherein an intersection point is the culvert working point skeleton original point, making a tangent line of the space line position from the culvert working point skeleton original point, projecting the tangent line to the horizontal plane, taking the direction of the projected line as the x direction of a skeleton coordinate system, taking the vertically upward direction as the z direction of the skeleton coordinate system, obtaining the y direction of the skeleton coordinate system by cross product operation between the z direction and the x direction, traversing each culvert mileage information stored in a table, and finally generating the full-line culvert working point skeleton.
2. The BIM-based railway culvert design method of claim 1, wherein: in the step (ii), the culvert section template consists of two parts, namely a three-dimensional model of the culvert main body structure and a skeleton coordinate system positioned at the end point position.
3. The BIM-based railway culvert design method of claim 1, wherein: the culvert section skeleton in the step (iii) comprises a plurality of coordinate systems, the number of the coordinate systems is twice that of the culvert sections, and the coordinate systems serving as the culvert section skeleton correspond to the coordinate systems with two ends of each culvert section serving as input elements respectively;
the culvert section skeleton established by taking the culvert station skeleton established in the step (i) as an input element comprises the following processes: establishing a table, wherein the table stores the section size information of the culvert sections and the position information of each culvert section; firstly, according to the filling height and the culvert axis direction information stored in the table, a work point framework coordinate system is translated downwards and rotates around a z axis; according to the length of the culvert section under the space linear position and the proportion of the culvert section under the space linear position stored in the table, moving the skeleton coordinate system generated in the previous step along the culvert axis direction to generate an end skeleton coordinate system of the culvert section under the space linear position; and moving the end skeleton coordinate system of the culvert section under the spatial line position generated in the previous step along the z direction and the culvert axis direction according to the length of each culvert section, the width of the gap between each culvert section and the relative height difference of the culvert sections to generate the end skeleton coordinate system of all sections of the culvert working point.
4. The BIM-based railway culvert design method of claim 1, wherein: (iv) instantiating the culvert segment template created in step (ii) on the culvert segment skeleton created in step (iii), including the process of:
extracting an end coordinate system corresponding to each culvert section in the culvert section skeleton to serve as an input element of a culvert section template, extracting section size information stored in a data table, assigning parameters of the culvert section template, performing cyclic operation, and generating a BIM model of all culvert sections of the work point.
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Address after: No.109, East 7th Road, Tianjin Free Trade Zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee after: CHINA RAILWAY DESIGN Corp. Address before: 300142 Hebei District, Zhongshan Road, No. 10, Patentee before: THE THIRD RAILWAY SURVEY AND DESIGN INSTITUTE Group Corp. |