摘要
采用三维有限元方法动态模拟了连拱隧道的施工过程,并分析和探讨了隧道在开挖过程中围岩变形的时空效应以及左右洞施工的相互影响。分析结果表明,对单洞施工,开挖面对围岩变形的影响范围为其前后方2.5B(B 为隧洞净宽);考虑右洞开挖,对左洞围岩位移的影响范围分别为开挖面前方(未开挖)2B 和开挖面后方(已开挖)1B。最后分析了拱顶最大沉降量随开挖面推进的变化和产生的位置以及右洞开挖的影响。
By using 3D finite element method to simulate the construction process of twin tunnel,the space-time effect of the deformation of surrounding rocks and the transaction between the left tunnel and the right tunnel,are analyzed and discussed.It is found that the influence region on deformation is about 2.5 times of the tunnel diameter in the case of the excavation of single tunnel. During the excavation of twin tunnel,the influence region on deformation of left hole is about 2 times of the tunnel diameter in front of advancing face,and is about equal to the tunnel diameter at the back of advancing face.Finally,the variation of maximum settlement in vault midline and location with face advancing and the effect of right hole,are analyzed.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第S1期256-260,共5页
Rock and Soil Mechanics
基金
上海市重点学科(岩土工程)资助
