Abstract: Underground structure modeling，especially structures with complex shape，such as subway station，is still a great challenge in the field of 3D underground digital modeling，although stratum modeling can be realized easily with Triangulated Irregular Net（TIN） or other methods.The method of modeling based on feature is proved to be an efficient way to solve this question by a 3D modeling example of a complex subway station.

Key words: feature-based, 3D digital modeling, complex subway station

摘要： 三维地下空间数字建模中，地层建模通过三角网等方法已经能够方便地实现，地下建（构）筑物的快速建模目前仍然是一个难题，尤其是对体形复杂的地下结构，如地铁枢纽车站。通过将基于特征的建模方法应用于一个复杂地铁枢纽车站建模实例，证明基于特征的建模方法能够有效解决复杂地下建（构）筑物数字建模的困难。

关键词: 基于特征, 三维数字建模, 复杂地铁枢纽车站