文档介绍：摘要近年来,由于连拱隧道具有线形流畅,占地面积少,空间利用率高等不可替代的优点,在一些特殊地形地质条件下,连拱隧道方案被越来越多的采用。连拱隧道根据中隔墙的类型可分为整体式中墙连拱隧道、复合式中墙连拱隧道和无中墙连拱隧道。整体式中墙和复合式中墙连拱隧道是传统的连拱隧道,本文对这两种连拱隧道的技术特点进行了总结,重点分析了中隔墙的结构参数、受力特征、施工流程以及防排水措施,并对整体式中墙连拱隧道和复合式中墙连拱隧道进行了对比。无中墙连拱隧道是一种新型的连拱隧道,在厦门市机场路一期工程中的梧村山隧道中即采用了该结构。本文即以该工程为背景,对无中墙连拱隧道结构进行了研究。无中墙连拱隧道即通过先施作-t受ll洞室的初期支护和二次衬砌,然后将另一侧洞室的初期支护与先行洞初期支护相连,从而取消中隔墙结构。本文首先采用数值模拟的方法,对无中墙连拱隧道结构的受力特征进行了研究;然后,研究无中墙连拱隧道的细部构造,即将两洞初期支护搭接点的位置进行调整、比较,分析两洞初期支护搭接点的合理位置;最后,对无中墙连拱隧道的施工方案进行了比选,即对交叉中隔壁工法的两种施工工序进行比较分析。关键词:连拱隧道;无中墙;数值模拟;搭接点;施工方案 ABSTRACT Recently,due todouble-arch tunnel谢tIl smooth linear,covering lessspace and utilization ofhigher irreplaceable,in some special topographic andgeologic conditions, thedouble—arch tunnel option hasbeenusedmore frequently. According totype ofthemiddle wall,double—arch tunnel can becategorized into integral middle—walldouble-arch posite middle-wall double-arch tunneland double·arch tunnel without middle- middle-wall posite middle—wall double—arch tunnel isthetraditional technology featuresof these two double-arch tunnel aresummarized in thispaper,focusing on analysis ofthethe structuralparameters,mechanical features,construction processes and drainage facility ofthemiddle—-wall posite middle-wall double—arch pared inthispaper. Structure ofdouble—arch tunnelwithout middle-walliS anew double-arch tunnel., Itis used inWucunshan tunnel inairport Road ofXiamen is thebackground of thispaper. Structure ofdouble—arch tunnelwithout middle·wall is tothesideofthechamber, Sincere supporting the initialand secondary lining,and then the other side ofthe chamber oftheEarlySupport and thefirst holeconnected tosupporting earlystage,thus abolishing thewall ,the stresscharacteristics ofdouble-arch tunnel without middle—wallare studied withthenumerical ,the detail structure of thedouble-arch tunnelwithout middle—wall iSstudied,that iS,initially support two holes overlapping points