earth time zone 中文意思是什麼
earth time zone
解釋
世界時鐘-
On our spherical earth each segment delineates a lune called a time zone.
在我們這第一個球形的地球上，被劃成月牙形的每一個等分稱為一個時區。 -
For the construction of single - arch tunnel within cracked surrounding rocks, 8 tunnel models are set up to study the effect of the earth pressure distribution of the various surrounding rocks due to excavation. the relationships between the loosen zone of tunnel radial earth pressure and the tunnel diameter, the characteristics of surrounding rocks and the exposed time are revealed. it is showed that the pressure loosen radius is 1. 2 ~ 2. 0 tunnel diameters and the strongly loosen radius drops to 0. 5 ~ 1. 0 one for double lane tunnel
對于單拱破碎圍巖隧道的構築問題，作者設置了8個隧道模型，研究開挖對不同隧道圍巖壓力分佈的影響，揭示了洞周徑向壓力的鬆弛范圍與洞徑、圍巖特性、裸露時間的關系，得到雙車道隧道壓力鬆弛半徑為1 . 2 2 . 0倍洞徑，強烈鬆弛區半徑為0 . 5 1 . 0倍洞徑。 -
In order to make the studying about the seismic exploration method possess systematic nature and the ability of tackling key problem in front - zone of mountain, we have done the research work of tackling key problem aiming at the field gathering technology of seismic exploration of the complicated structure belt ( the construction of underground and the earth ' s surface condition are complicated ) of front - zone of mountain in this text, and a large number of relativity trials by the close combination of production and scientific research, summarized a set of field method of the complicated structure belt of front - zone of mountain, adjusted both of trial factor and construction factor of the field gathering in time, achieved finally the goal of making its structure character clear
近幾年來，隨著地震勘探裝備和技術的改進，野外資料採集技術有了新的進展，主要表現為多種震源聯合激發方法（井炮和大噸位可控震源） ，基於地表條件及表層調查基礎上的激發選點方法，小道距、長排列、高覆蓋接收方法，基於模型的「分段、分線、分區」觀測系統目標設計方法等，取得了顯著的勘探效果。為了使山前地震勘探方法研究具有系統性和攻關性，通過本文對復雜山前復雜構造帶地震勘探的野外採集技術進行攻關研究，進行了大量具有針對性的試驗，總結出了一套山前復雜構造帶野外施工方法，最終達到了搞清復雜山前復雜構造帶山前復雜構造帶構造特徵的目的。
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