摘要
隧道围岩的应力分布及变形特征对保证其长期稳定性具有关键的作用。本文以柴家湾隧道为例进行实态建模,通过采用有限元软件ANSYS对其施工全过程进行了三维弹塑性数值模拟计算。研究结果表明,隧道拱顶和拱脚处应力集中现象明显,局部可能出现拉应力;变形主要集中在拱顶、拱腰部位,衬砌单元所受内力在规定强度范围以内,支护措施合理有效。
Ensuring its long-term stability is very important for the distribution of stress and displacement of tunnel surrounding rock. The example of Chaijiawan tunnel was modeled in this paper and its construction process was numerically simulated with 3D elastic-plastic finite element method by ANSYS. The results show that the accumulation of stress occurs at vault and abut, with local tension stress. The deformation is mainly concentrated near the vault and hance, and the internal force of lining is in the acceptability limit of strength, so that the support measures are efficiency.
出处
《地质灾害与环境保护》
2008年第3期82-85,共4页
Journal of Geological Hazards and Environment Preservation
关键词
隧道
围岩稳定性
支护效果
tunnel
wall rock stability
supporting effect
