Objective  Automated BIM (building information modeling) of complex metro stations faces various challenges, including cumbersome modeling operations, inaccurate component parameters, and deliverable models that fail to meet interactive application requirements. As a result, it is hard to rapidly achieve automated BIM modeling of metro stations based on design data, and the precise alignment and seamless integration with line models. Therefore, it is necessary to study a BIM-based integrated 3D (three-dimensional) modeling method for metro stations and lines.

Method Based on engineering system decomposition structure and semantic rule constraints, a database of metro station component design parameters and constraint rules is established. And on this basis, a spatial coordinate set and rotation azimuth calculation algorithm for station models are developed. By performing path segmentation on the ground projection line and applying a lofting-based modeling method, the line solid model of the connecting section between the station and the line is automatically supplemented and created. This approach effectively addresses key technical issues in the station-line splicing process, including automatic orientation adjustment, precise positioning, and seamless model integration. Using C# language and Revit API (application programming interface) secondary development technology, a general modeling system for parametric and rule-constrained metro stations is developed. By forming parameter sets through inter-constraints among unit parameters, the system enables rapid construction of rule-compliant models for metro station main structures, auxiliary facilities, specialized equipment, and track lines.

Result & Conclusion  The proposed method enables a BIM-based rapid creation of metro station and line integrated models, resolving core issues in metro station modeling such as geometric size parameterization, rule standardization, interactive adjustment, and spatial layout interconnectivity.