This study clarifies the earthquake-induced damage patterns of rock tunnels and associated affecting factors, which is conductive to aseismic design for tunnels.

研究成果表明隧道受震损害原因与影响因素，可为山岭隧道耐震分析与设计提供参考。

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Soft rock tunnels have the characteristics of high ground pressure and large deformation and are difficult to be supported. So they can not be easily controlled with single support method.

软岩巷道多具有高应力、变形大、难支护等工程特征，单一支护方式难以控制围岩变形。

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In recent years the reinforced concrete precast element linings are adopted more and more for the soft surrounding rock tunnels. But a perfect assembling method for lining is not performed yet.

软弱围岩隧洞在设计上采用钢筋混凝土装配式预制构件衬砌的方式近年来越来越多，但在施工上还一直没有形成一套较完善的衬砌安装方法。

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With its elaborate system of narrow passes, viaducts and rock-hewn tunnels, the Swiss rail network has set the standard for more than a century, since its engineers first laid tracks up and down the steepest slopes and seemingly defied the impossible.

BBC: Swiss movement

The first thing Ms. Bower saw when she visited the building was "the large white bubble" located on Second Avenue, a "muck house" used to store rock bored out for subway tunnels.

WSJ: Subway Work Sinks Prices On East Side

Soon the window glass becomes cool to touch as the train climbs more than 1, 000 metres into a bare, otherworldly landscape of boulders and snowdrifts, navigating beautiful but treacherous mountain country through high passes and tunnels hewn from solid rock.

BBC: The perfect trip: Norway