Three-dimensional railroad bed modeling method

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 ...

AI Technical Summary

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 engineering survey must be doubled. Inaccurate, and at the same time, due to the inability to get rid of the limitation of the cross section, the 3D forward design of the subgrade cannot be directly carried out

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