摘要
采用大型非线性有限元软件模拟隧道开挖变形,建立了隧道开挖变形的二维有限元分析模型。利用有限元软件的单元寿命和死亡函数,对基坑开挖和支护过程进行了动态模拟。分析了单侧导坑法对隧道围岩变形的影响。结果表明,单侧导坑法引起的变形缩回隧道。穹顶的Z方向位移变化很大,Y方向的位移变化很小。另外,还分析了螺栓位移的变化,进一步说明了单侧导坑施工方法对隧道围岩变形的影响。此时,锚被拉起并起到悬挂作用。
The large-scale non-linear finite element software is used to simulate the tunnel excavation deformation, and a two-dimensional finite element analysis model of tunnel excavation deformation is established. The dynamic simulation of excavation and support process of foundation pit is carried out by using the element life and death function of finite element software. The influence of unilateral pilot pit method on tunnel surrounding rock deformation is analyzed. The results show that the deformation caused by the one-sided pilot method retracts to the tunnel. The Z-direction displacement of the dome varies greatly, while the Y-direction displacement varies little. In addition, the change of bolt displacement is also analyzed, and the influence of construction method of unilateral guide pit on the deformation of surrounding rock of tunnel is further explained. At this point, the anchor is pulled up and suspended.
作者
魏盛昊
WEI Sheng-hao(School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《价值工程》
2019年第7期92-94,共3页
Value Engineering
关键词
隧道
开挖
变形
数值分析
tunnel
excavation
deformation
numerical analysis
