Legend identification method and system for generating three-dimensional BIM model through subway station two-dimensional drawing

Abstract

The embodiment of the invention provides a legend recognition method and system for generating a three-dimensional BIM model through a two-dimensional drawing of a subway station, and the method comprises the steps: obtaining a civil engineering drawing, generating corresponding horizontal and vertical section drawings according to the civil engineering drawing, and carrying out the classification; according to the classification result, the planar graph and the vertical graph, component legends in the graphs are extracted, and legender information in the component legends is determined; in combination with the component legend and legend information, identifying an axis net legend in the planar graph, identifying a building elevation in the elevation, and in combination with a preset geometric figure identification algorithm, obtaining plane data and elevation data; and plane stretching is obtained according to the plane data, facade stretching is obtained according to the facade data, and the three-dimensional BIM model of the entity of the subway station is obtained through fusion. By adopting the method, when the civil engineering drawing is converted into the three-dimensional BIM model by taking the legend of the drawing as an identification basis, the method does not depend on layer data processing of the original drawing any more, so that the time for reconstructing the BIM model is shortened, and the identification progress and the automation degree of the CAD drawing are greatly improved.

Description

technical field [0001] The invention relates to the technical field of building information models, in particular to a legend identification method and system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station. Background technique [0002] In recent years, rail transit has been recognized by more and more cities as an effective way to solve urban transportation problems, and rail transit business has shown a great momentum of vigorous development. With the development of the subway business, the subway owners' understanding of the subway is getting deeper and deeper, and the design units are required to use BIM technology to design in an all-round way, in line with international standards. In terms of design results, owners in many cities not only require the submission of 2D drawings, but also the corresponding BIM models. [0003] From the experience of BIM implementation in various urban rail transits, the common practice of ...

AI Technical Summary

Problems solved by technology

This method of modeling involves a lot of tedious and repetitive work. In addition, because the operation method of BIM software is different from that of traditional 2D design software, the creation of 3D BIM models often takes several times longer than drawing 2D drawings. The subway station is a System engineering involves dozens of specialties. The waste of time and cost caused by the use of this method by various specialties is a huge obstacle to the promotion of BIM technology application in the municipal rail transit industry

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