Abstract
With the continuous improvement and improvement of computer aided design software, engineering designers gradually break away from the paper work of drawing board and draw drawings by computer. These soft wares have strong usability and flexibility. By calling the entity primitive model in the library, the three-dimensional model of the scheme line is constructed in real time, and it is checked and modified in the three-dimensional environment, and different structure types are compared to realize the three-dimensional entity route selection design. It is the trend of the times to integrate and intelligentize from survey design to construction, and it is also the necessary means and demand to enhance the market competitiveness of road and civil engineering survey general contracting projects. The BIM modeling method of existing line structure using advanced survey means needs to be further improved. The main structures of the railway line are modeled based on Civil3D. After assembly and debugging, BIM modeling of various types of railway line structures can be realized.
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