heading-and-cut 中文意思是什麼
heading-and-cut
解釋
正梯段掘進-
Adopting the rhombus cut and the mid - deep - hole smooth blasting technology to realize fast heading in rock drift
採用直眼菱形掏糟中深孔爆破技術實現巖巷快速掘進 -
Using fem ( finite element method ), the paper makes mechanical analyses on bench cut method and side heading method, it also makes mechanical analyses on some auxiliary construction methods, such as big pipe - roof protection, horizontal roll - spraying, big and small angle pipe - roof protection and surface grouting
論文採用有限元的分析方法，主要對臺階法、側壁導坑法進行了力學分析，也選擇了大管棚法、水平旋噴法、大小外插角管棚法和地表注漿加固四種輔助工法進行力學分析。 -
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、單側壁導坑法和雙側壁導坑法在隧道洞口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、雙線和三線隧道的洞口段處于淺埋、偏壓、鬆散的地層中時各種施工方法選擇的先後順序。 -
Ice and heavy snow in central and southern china have cut road, rail and air links and forced the closure of power stations and factories ? just as millions of people are heading home for the traditional lunar new year holiday
中國中部和南部的嚴重冰雪切斷了公路、鐵路和航線，導致電站與電廠被迫關停? ?而此時此刻，成百上千萬人正要返回家鄉度過傳統的春節假期。 -
On the last day of the fair, the association held a seminar titled look at the angels smile exploring whole life education through spiritual initiation, during which educators and medical professionals shared unique perspectives with the audience on education from the womb to the development of a holistic personality. heading toward the golden age even before the ribbons were cut to open the exhibition, the vice president of
當書展進入最後一天時，清海無上師世界會出版公司特別舉辦一場主題為看見天使的微笑-從靈性啟蒙看全生命教育的座談會，與會的教育專家和醫師對現今人類從母體胎教到全人格教育之面面觀，提出專業獨到的見解，引發現場來賓熱烈的討論。
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