roof shield 中文意思是什麼

roof shield 解釋
頂板盾構
  • roof : n 1 屋頂，房屋；家屋。2 （放行李的）車頂；笠形罩。3 上頜。4 最高部，頂部；【礦物】頂板。5 【航空...
  • shield : n 1 盾；盾牌。2 罩；屏；屏蔽。3 防禦物；保護物。4 防禦；保護。5 保護者；庇護者[人]。6 盾形物；【...
  1. For the tip - to - face roof stability, chock - fram type powered support only be applied to hard top - coal, shield - type powered support and chock - shield - type powered support can be applied to three top - coals

    通過分析，為保證端面頂板穩定，支撐式液壓支架僅適用於頂煤為硬煤的條件下，掩護式和支撐掩護式支架在三種頂煤條件下均可以適用。
  2. Roof inner shield

    頂蓋護板
  3. It indicates that setting load of front leg and front leg - to - wall distance and load - bearing waste shield have important influences towards tip - to - face roof stability, results have been proved by the example analysis

    研究指出支架前柱初撐力、支架前柱到煤壁距離、掩護梁受載等參數對端面頂板穩定性有重要影響，結論在現場得到了驗證。
  4. For the needs of second - term project for pudong airport there is possibility to construct a tunnel of serving driveway under the operating runway, but it s obviously of great difficulty, and nowdays there are few such projects for reference, so it is urgent to carry out the research to make sure of the feasibility for the construction based on the analysis of geologic information, cross section of the line and restriction of construction, in this paper three construction schemes and the effects of each scheme were analysed : cut and cover method, pipe roof culvert box advancing method. shield driving method

    摘要浦東國際機場二期工程建設存在著在運營跑道下實施地下穿越的可能性，在運營跑道下實施地下穿越難度很大，而目前國內外軟土地區在跑道下實施地下穿越工程很少，因此論文通過研究分析了服務車道地下穿越跑道區域的可行性及方案。
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