The initial section of tunnel had to be dug by hand.

隧道的起始部份不得不人工挖掘。

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With the developing and utilizing of ground space, new requirements and demands is given to the section of tunnel.

随着地下空间的不断深入开发和利用，人们对隧道功能提出了新的要求和隧道断面的多样化需求。

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Tunnel lining commonly is curve wall, and the load is complex, so load effect at each section of tunnel lining is not easily obtained.

隧道衬砌通常是曲线壁，和负载是复杂的，所以加载在每个边的隧道衬砌的影响是不容易得到的。

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Patrick Morris, of the Friends of Cromford Canal, said only a small section of the tunnel was accessible.

BBC: Butterley tunnel gets Scheduled Ancient Monument status

During the week-long exhibition at the Scottish Parliament to celebrate the Scottish contribution to the creation and operation of the Large Hadron Collider visitors are able to walk through a full-size replica of a section of the LHC tunnel.

BBC: Scotland