作　　者： ; ; ; ;

机构地区： 长安大学公路学院陕西省公路桥梁与隧道重点实验室

出　　处： 《岩石力学与工程学报》 2010年第A01期3265-3272,共8页

摘　　要： 针对浅埋偏压连拱隧道施工中出现的受力非对称问题,结合药水峡连拱隧道的实际情况,通过有限元分析与现场监测,分析浅埋偏压连拱隧道非对称支护结构的受力性状,采用非对称设计方法对支护结构进行优化。结果表明:对浅埋偏压连拱隧道支护结构进行非对称设计施工是可行的;连拱隧道先施工洞室的受力大于后施工洞室,此结果与隧道偏压状态关系不明显;浅埋偏压连拱隧道围岩压力分布宜按圆形洞室的径向荷载考虑。因此,在进行类似浅埋偏压连拱隧道设计施工时,应注意施工顺序,支护结构可进行非对称设计。 According to the issue of unsymmetrical force in the construction of shallow-buried bias multi-arch tunnel and the actual situation of Yaoshuixia multi-arch tunnel, the mechanical characteristics of shallow-buried bias multi-arch tunnel are analyzed using finite element method and in-situ monitoring, and the support structure is optimized with unsymmetrical design methods. The results indicate that the unsymmetrical design and construction of the shallow-buried bias multi-arch tunnel are feasible; the pressure on earlier constructed cavern of the multi-arch tunnel is greater than that of the later one, and the relation between this result and the bias condition is not obvious; the pressure on surrounding rock of shallow-buried bias multi-arch tunnel should be considered according to the radial load of the round cavern. Therefore, when designing and constructing the similar shallow- buried bias multi-arch tunnel, the construction sequence should be paid attention to, and the unsymmetrical design of the structure is feasible.

关 键 词： 隧道工程 连拱隧道 浅埋偏压 非对称结构 受力性状 数值模拟 现场监测

领　　域： [建筑科学] [交通运输工程]