The BIM modeling of Multi-Component Subgrade in a Railway Station (MCSRS) suffers from an inefficient manual approach due to its specific features and absence of a data standard. The Industry Foundation Classes (IFC) has been widely used for describing various components in the building industry while its current version fails to depict an MCSRS. In this study, the IFC is extended to describe the geometric information and hierarchy for an MCSRS, based on which an automatic workflow for converting the original design data to the corresponding 3D BIM model complying with IFC standard is developed. To validate the methodology, a real-world case is used for testing the modeling result, in which several different modeling cases between two cross-sections are examined. The results show that the BIM modeling for an MCSRS is greatly accelerated compared with the manual modeling approach and can be used as a cross-platform tool.

火车站多组件路基（MCSRS）的BIM建模由于其特定的特征和缺乏数据标准而存在效率低下的手动方法。工业基础类 (IFC) 已被广泛用于描述建筑行业中的各种组件，而其当前版本未能描述 MCSRS。在这项研究中，IFC 被扩展到描述 MCSRS 的几何信息和层次结构，在此基础上开发了将原始设计数据转换为符合 IFC 标准的相应 3D BIM 模型的自动工作流。为了验证该方法，使用真实案例来测试建模结果，其中检查了两个横截面之间的几个不同建模案例。