摘要
本文采用非线性有限元法分析研究了浅埋隧道软弱围岩的稳定性特征以及地层锚杆加固围岩的力学机理。文中着重描述了开挖引起的浅埋隧道围岩应力场位移场分布规律和地层锚杆锚固区内应力位移的变化规律;提出了上复地层围岩塑性区、地层锚杆施锚效果、地层锚杆横向加固宽度等定性计算结果。这些结果可供工程设计施工参考采用。本文在非线性有限元计算分析基础上,进一步讨论了计算结果与现场测试资料的对比分析,从而验证了计算结果的可靠性。
This paper attempts to investigate the stability of tunel in shellow overburden of soft-weak rock and the effect of ground anchor supporting the surrounding rock by using non-linearity FEM analysis. It lmphasizes the distribution of stresses and displacements caused by excavation in the shallow overburden and the change of stresses-displacements in an area ground-anchoredfrom from the surface of tunnel. Results of qualitative analysis of the relaxed range in overburden rock, the effect of anchoring from the surface of tunnel, and the reform width by ground anchor are given for reference in tunnel design and construction. Based on the stability analysis by non-linearity FEM, the paper compares FEM results with the in-situ measurement data to prove that the results are reliable.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
1992年第1期97-107,共11页
China Railway Science
关键词
稳定性
锚杆支护效应
隧道
围岩
shallow tunnel, surrounding rock stability, rock-massinstability, anchor bolt support, anchoring effect.
