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pilot tunnel中文是什么意思

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用"pilot tunnel"造句"pilot tunnel"怎么读"pilot tunnel" in a sentence

中文翻译手机手机版

  • 超前平硐
  • 导洞(导坑)
  • 道洞
  • 前探平硐
  • 隧道导洞

例句与用法

  • Construction of flat tunnel of large span at extra - shallow depth must be conducted on the principle that advance grouting should be strictly performed before excavation and length of pull at one time should be short , together with reinforced support , immediate closing and constant monitoring and surveying . that preceding pilot tunnels , large - volume excavation divided into small ones , excavation of flank before that of center , upper before lower , arch before wall etc is a good method which could effectively reduce surface subsidence and its adverse effect on adjacent buildings , in addition , some other measures are also taken to lessen blast - induced vibration in the ground and surrounding structures . in a word , all means and steps mentioned above have already proved effective and practicable in practice
    软弱大跨超浅埋扁平隧道必须按“管超前,严注浆,多分部、短开挖、强支护、快封闭,勤量测”的施工原则进行施工,采用“眼镜超前,化大为小,先侧后中,先上后下,先拱后墙”的施工方法控制地表沉降和对周边建筑物的影响;采用“多分部,化大为小,短进尺,密布眼,弱装药,设减振槽” ,控制爆破振动,经过实践证明,这些方法都是行之有效的。
  • Tensile stress field would appear in the proximity of arched vault after excavation , slacking of surrounding rock and subsequent dropping of blocks of rock from such area would possibly occur at any time in the context of extra - shallow depth . so i - steel arched support must be erected to provide against possible block dropping and be integrated into a ring with that of pilot tunnels on both sides
    拱顶在核心土开挖后,在一定范围内出现拉应力区,在超浅埋情况下极容易掉块和发生围岩松驰,因此核心土必须边开挖边架设工字钢拱架,使之与左右导洞拱顶工字钢形成整体。
用"pilot tunnel"造句  
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