Three-dimensional railroad bed modeling method

A three-dimensional modeling and roadbed technology, applied in 3D modeling, image data processing, special data processing applications, etc., can solve problems such as inability to perform three-dimensional forward design of roadbeds, increasing engineering measurement costs, and inaccurate engineering calculation. Achieve the effect of avoiding unreasonable engineering measures, improving design efficiency and accurate statistics

Active Publication Date: 2018-04-20
CHINA RAILWAY DESIGN GRP CO LTD
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Problems solved by technology

Insufficiency of the traditional three-dimensional modeling method of railway embankment: the accuracy of the model is affected by the density of the measured cross-section. To improve the accuracy, the cost of

Method used

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  • Three-dimensional railroad bed modeling method
  • Three-dimensional railroad bed modeling method
  • Three-dimensional railroad bed modeling method

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Embodiment Construction

[0039] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0040] see figure 1 , figure 2 and image 3 , a method for three-dimensional modeling of a railway subgrade, comprising the steps of:

[0041] S1: Basic data preparation for railway embankment modeling;

[0042] Given the three-dimensional terrain surface M, the left shoulder line L1 and the right shoulder line L2, as well as embankment and cutting standard cross-sections with layers and 100m high slopes, project L1 and L2 on the XY plane to obtain projection lines L3 and L4 ; Among them, the three-dimensional topographic surface S1 is generated from the aerial survey point cloud data; L1 and L2 are obtained based on the specified displacement of the center line of the line according to the embankment and cross-section form of the embankm...

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Abstract

The invention discloses a three-dimensional railroad bed modeling method including: S1, preparing the essential data of railroad bed modeling; S2, determining a demarcation point of an embankment anda cutting at the side of a left road shoulder L1; S3, determining the railroad bed form of a section point0 to the point1; S4, fixing a corresponding railroad bed standard cross section; S5, generating respective closed bodies by sweeping; S6, performing Boolean operation; S7, completing the railroad bed model of all sections at the side of the L1; S8, completing the railroad bed model at the sideof a right road shoulder L2; S9, deleting L1, L2, the embankment, the cutting standard cross section and a 3D terrain surface M; and S10, obtaining the three-dimensional model of railroad bed. According to the high-precision three-dimensional terrain and the road shoulder line, the method determines railroad bed sections by a certain rule, and generates entities by sweeping the railroad bed standard cross section in the corresponding sections, and obtains a railroad bed fitted with the terrain by the Boolean operation. The method is high in modeling efficiency, avoids the additional manual measurement, and is accurate in engineering quantity calculation.

Description

technical field [0001] The invention relates to the technical field of roadbed engineering modeling, in particular to a three-dimensional modeling method for railway roadbeds. Background technique [0002] The 3D modeling of railway subgrade is a technology that uses computer technology to combine subgrade information with visualization tools in a 3D environment for subgrade research. This technology can intuitively display the results of railway two-dimensional design with three-dimensional graphics, and people can provide insights on the design scheme with the help of intuitive three-dimensional graphics, which provides convenience for the cooperation of various disciplines, and also provides scheme reviewers and high-level decision makers A more reliable basis for decision-making. [0003] Traditional railway subgrade 3D modeling adopts the method of constructing 3D subgrade model based on 2D design cross section. This design method can be understood as a cross-section ...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06F17/50
CPCG06T17/00G06F30/13
Inventor 雷晓雨陈则连王建吕菲张戎垦冷景岩崔维孝
Owner CHINA RAILWAY DESIGN GRP CO LTD
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