In China, traditional portal of railway tunnel can be sorted as three types-origin, modified and special types, inclusive of 16 kinds on basis of the characteristic of terrain, basically they are of end wall and post type.

• 我国传统铁路隧道洞门根据地形特点分为基本型、变化型、和特殊型三大类十六种形式，但始终脱离不了端墙、柱式的形式。