双连拱隧道中墙力学行为研究  

STUDY OF MECHANICS BEHAVIOUR OF MID-PARTITION IN DOUBLE-ARCHED TUNNEL

作　　者：袁勇[1] 王胜辉[1] 章勇武[2] 杜小平[2] 杜国平[2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]重庆渝东高速公路有限公司,重庆400042

出　　处：《岩石力学与工程学报》2003年第z1期2313-2316,共4页Chinese Journal of Rock Mechanics and Engineering

摘　　要：针对金竹林双连拱隧道,通过有限元方法模拟连拱隧道的不同开挖工序,研究了连拱隧道的重要组成部分——中墙的力学行为。结果表明,中墙是连拱隧道的主要承载构件.左右洞室的非对称开挖会对中墙产生不平衡推力和弯矩。中墙的合理设计,可以显著提高连拱隧道的承载力、约束隧道洞周位移、提高衬砌结构安全度。开挖工序的合理设计,可以优化连拱隧道的中墙以及整个隧道结构。The two excavating procedures are simulated by finite element method on Jinzhulin tunnel to study the mechanics behaviour of the most important portion of double-arched tunnel,the mid-partition.The study results make it clear that the mid-partition is the load-beating member and the non-symmetrical excavating procedure would bring unbalanced forces and bending moment on the mid-partition.The feasible design of mid-partition can improve the bearing capacity of the whole tunnel,restrict the displacements of edges of tunnel,and increase the safety degree of lining.

关 键 词：地下工程 双连拱隧道 中墙 非对称开挖 有限元法 模拟计算 力学性能 

分 类 号：U455[建筑科学—桥梁与隧道工程]