Extra-long tunnel modeling method and system based on BIM (Building Information Modeling) technology

The invention discloses an extra-long tunnel modeling method and system based on a BIM technology. The method comprises the steps that drawing information is obtained through OCR optical recognition to create a BIM informatization EXCEL database, tunnel BIM parameterized components are created based on the EXCEL database, tunnel BIM codes are compiled, the BIM parameterized components are endowed with identities, and a BIM parameterized component library is created; the modeling difficulty that a single modeling technology is long, miscellaneous, curved and multiple in structure in extra-long tunnel modeling is overcome, the extra-long tunnel modeling process is simplified, the three-dimensional space positioning precision of an extra-long tunnel structure model is improved, the application rate of a modeling system is increased, and the modeling efficiency is improved. And the modeling efficiency and the model precision of the extra-long tunnel and the accuracy of later model collision inspection and constru