起重頂桿 的英文怎麼說

中文拼音 [qǐzhòngdǐnggǎn]
起重頂桿 英文
jack leg
  • 起 : 起Ⅰ動詞1 （站起; 坐起） rise; get up; stand up 2 （取出; 取走） draw out; remove; extract; pull 3...
  • 重 : 重Ⅰ名詞（重量; 分量） weight Ⅱ動詞（重視） lay [place put] stress on; place value upon; attach im...
  • 頂 : i 名詞（人體或物體的最上部） crown; peak; top Ⅱ動詞1 （用頭支承） carry on the head 2 （從下面拱...
  • 桿 : 桿名詞（桿子） pole; staff
  • 起重 : jack up起重臂 jib loading boom; cargo boom; erector arm; jibboom; 起重車 carriage hoist; crane ca...
  1. 2 ) from the angle of constructing course, steeve - arch supporting structure requires low - capacity cranes to erect, and simple constructing methods easy to meet. the time spending on construction is short. the usual arch supporting structure requires high - capacity cranes to erect, and complicate constructing methods hard to meet

    2 ）從施工角度看，吊桿式拱架支承結構對吊車的起吊能力要求低，工藝簡單，施工方便，工期短；豎桿式拱架支承結構起頂重量大，對吊車的起吊能力要求高，施工難度大。
  2. Derrick boom headfittings - fixed type

    起重機吊桿的頂部配件.固定型
  3. A usually portable device for raising heavy objects by means of force applied with a lever, screw, or hydraulic press

    千斤頂，起重機通過杠桿、螺絲釘或水的壓力把重物提起的便攜式裝置
  4. The underground tests show that the deformation and roof delamination of roadway surrounding rock can be effectively reduced by means of great increase of the bolt pretensioned stress, the steel strip plays an important role in the rock bolting system, and there exsits a critical value for pretensioned stress, up to or beyond which the rock bolting can effectively control the deformation and damage of the surrounding rock

    井下試驗表明，大幅度提高錨桿預應力可顯著減小巷道圍巖變形，有效控制頂板離層；鋼帶在預應力支護系統中起非常重要的作用；錨桿預應力存在臨界值，達到或超過臨界值后錨桿支護可有效控制圍巖變形與破壞。
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