tunnel roof

The roof of the tunnel caved in.

隧道的顶部塌陷了.

Rescuers used props to stop the roof of the tunnel collapsing.

救援人员用支柱防止隧道顶塌陷。

The roof of the tunnel was supported by wooden props.

坑道顶用木柱支撑.

While considerable rigid wind tunnel test research has been performed to investigate wind loads on such simple somatotype fabric structures, saddle type, umbrella type and so on, relative little work has been conducted on aeroelasticity of complicate somatotype roof buildings.

目前，膜结构风洞试验以刚性试验居多，弹性试验相对较少，且国内这方面研究主要针对鞍形、伞形等简单体型的结构形式，与实际的工程应用相差较远。

Wind tunnel test of Guangzhou air-mail processing center was carried out to investigate the internal wind effect for long-span roof structure with openings.

结合广州航空邮件处理中心风洞试验，研究了开孔大跨屋盖结构的内部风效应。

The test conditions and main results of wind tunnel test for Terminal 3 at Beijing Capital Airport are introduced. The block shape coefficients for the most unfavorable conditions are given, which clearly show the characteristics of the wind pressure distributions on this long-span roof surface.

介绍了超大跨度屋盖结构&北京首都机场3号航站楼的模型风洞试验概况和主要结果，给出了屋面在最不利工况下的分块体型系数，清楚地显示了屋面的风压分布特征。

Stability Analysis for Tunnel Roof Based on Nonlinear Failure Criterion

基于非线性破坏准则的隧道顶板稳定性分析

The roof of the new tunnel hasn't been properly supported; It'shows signs of falling in.

新隧道的顶部支撑得不好, 已显出坍塌的迹象.