洞口側壁 的英文怎麼說

中文拼音 [dòngkǒuzhāi]
洞口側壁 英文
vertical sides of opening
  • : Ⅰ名詞(物體上穿通的或凹入較深的部分; 窟窿; 洞穴) hole; cavity Ⅱ形容詞(深遠; 透徹) profound; thorough; clear
  • : Ⅰ名詞1 (人或動物進飲食的器官; 嘴) mouth 2 (容器通外面的地方) mouth; rim 3 (出入通過的地方) ...
  • : 側形容詞[方言] (傾斜; 不正) slant; sloping
  • : 名詞1 (墻) wall (of a house etc ) : 銅墻鐵壁 bastion of iron2 (作用像圍墻的部分) wall of st...
  • 洞口 : entrance to a cave
  1. The paper introduces the progress and the statue quo of tunnel portal construction, discusses the condition to employ full face method, bench cut method, single side heading method and double sides heading method of portal construction, points out advantages and disadvantages of these methods. the order to adopt these methods of single track, double track and tri - track tunnel in shallow - depth, uneven pressure and incompact ground is also advised after compare

    討論了全斷面法、臺階法、單導坑法和雙導坑法在隧道段施工中的使用條件和優缺點,對這四種施工方法從各個方面進行了比選,提出了單線、雙線和三線隧道的段處于淺埋、偏壓、鬆散的地層中時各種施工方法選擇的先後順序。
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