tunnel portal

常见例句

Active earth pressure is the main load acted on tunnel portal . it's a key actor in tunnel portal design.
主动土压力是作用在隧道洞门上的主要荷载，是进行洞门设计的关键因素。
Railway tunnel portal is always designed according to the standard drawing with experience. Research on new-style tunnel portal is necessary.
现有的铁路隧道洞门的设计只是经验性地照搬标准图的模式，而对新型隧道门的研究是必要的。
Combined with the design requirements and the trait of the tunnel portal at Beijing Shanghai high speed railway, this paper introduces a new type of tunnel portal——the tunnel portal without end wall.
本文结合京沪高速铁路隧道门设计的要求及特点，详细介绍了一种新颖的洞门结构形式——无端墙隧道门的结构特点、适用条件、排水系统及结构检算。