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uploads/secondary line.jpg

secondary line 支線。

secondary metal

Then we simulate the common excavating methods of double - arc tunnel respectively , analyze the stress and strain of wall rock and support structure of each method , and recommend the best excavating method to construct double - arc tunnel in wall rocks of ii . then we analyze the “ three headings method “ in detail , and also simulate the effect of construction factor , stress releasing coefficient and secondary lining 對實際工程中最常用的三種開挖方法分別進行了施工模擬,分析了它們各自的圍巖和支護的受力變形規律,經比較后,得出了三導洞法是類圍巖中修建連拱隧道的較好開挖方法的結論。

The company operates over 70 international shipping routes , connecting more than 120 harbors in the world and forming the east - to - west main lines centered on china , the u . s . and europe , the secondary lines supported by japan , australia and south east asia , and branch lines in china , south east asia and europe 擁有全球運輸主干線70多條,掛靠世界重要港口120多個,形成以中國、美國、歐洲三大板塊為核心的東西主干航線體系,以日本、澳洲、東南亞為支撐的次干航線,以及中國、東南亞、歐洲三大區域內的支線網絡。

In order to detect the bottom thickness , cavity , leak and deformation of steel meshes in secondary lining of concrete in tunnel construction , the authors evaluate the wave character and the detected result in the second lining of the tunnel using surveying radar technology and conclude the wave character in the tunnel lining which has mass defect and tested the accuracy and reliability of this technique 摘要為檢明隧道混凝土二次襯砌中的底界厚度、空洞、漏水、鋼筋網變形等質量問題,利用探地雷達技術,通過對檢測方法及工程檢測實驗的研究,進行隧道二次襯砌中雷達波形特征參數及檢測結果評價,總結了隧道襯砌質量問題的雷達波形特征,驗證檢測方法的精度和可靠性。

Intrusion detection can ’ t only identify the aggressive activities from exterior , but also detect unauthorized activities and destructions from the internal network . it became secondary line of defense for network security after firewall and be attached importance increasingly 入侵檢測不僅可以識別來自外部的攻擊行為,也可以檢測來自內部網絡的未授權活動及破壞,成為繼防火墻之后網絡安全第二道防線,日益得到重視。

Based on continuous porous medium seepage model , it is assumed that if waterproofing board of complex lining is perfect , the secondary lining is leakproof , thus the formula of external water load on secondary lining with a grouting loop is deduced 以連續孔隙介質滲流模型為基礎,假定復合襯砌中防水板施工完好二次襯砌是封閉阻水情況,推導出了有注漿堵水圈的隧道襯砌結構外水荷載計算公式。

This paper utilized the deformation characteristics of rock and expatiates on the strain test method of surrounding rock by which to judge the surrounding rock ' s stability , and to choose the suitable opportunity and style of the secondary lining 摘要利用巖體的變形特性,通過測試隧道圍巖應變出隧道凈空實際收斂量,從而判定施工過程中隧道圍巖的穩定性,為選取合適的支護時機和方式提供依據。

At the part vault and arch foot in the tunnel secondary lining thickness , the standard difference and variance parameter is large than others , so insure the part thickness achieve design require by adjust construction craftwork 隧道二次襯砌厚度在拱頂和拱腳的部位的標準差和變異系數較大,在施工中應該考慮調整施工工藝,確保這兩個部位的厚度。

Pass through mechanical model calculate , discover the vault and arch foot part in the tunnel secondary lining thickness is weakness part , so at the design and construction must strengthen these part 通過力學模型計算,結構在拱腳與仰拱交接處以及拱頂部位為隧道二次襯砌混凝土結構的薄弱部位,設計和施工時應著重加強。

However , where a secondary line is too small to be included in the indices , the xd adjustment is calculated using the dividends paid on the main line and the combined share weighting 但是,非主營業務的數值太小了可以忽略不計入指數,除權調整就用主要業務的支付紅利和加權的股份比重計算。

Optimized techniques for fabricating the secondary lining of a two - storey shallow subway station with single arch and one row of columns excavated by mining method 單拱單柱雙層淺埋暗挖地鐵車站二次襯砌優化施工技術

Through tunnel model test , the action law of external water load on secondary lining with a grouting loop is obtained 根據隧道模型試驗理論,通過室內模型試驗得出了有注漿堵水圈的隧道襯砌結構外水荷載的作用規律。

Invention of out - going secondary line switch , resulting in economy of inter - office trunks . first used at san francisco 發明外向第二級尋線機,提高了局間中繼的收益,并首次在舊金山使用。

Legal problems existed in railway transport enterprise when turning secondary lines of business into independent companies and counter measurements 鐵路企業輔業改制存在的法律問題與對策

Evaluation of the effect of collapse in top area of a double - arched tunnel on its the secondary lining 雙連拱隧道洞頂坍方對二次襯砌穩定影響評價

Numerical analysis of secondary lining in double - arch tunnel 雙連拱隧道二次襯砌施工數值分析