岩土工程学报2012，Vol.34Issue(1)：110-114,5.
基于统一强度理论的深埋圆形岩石隧道收敛限制分析
Convergence-confinement analysis of deep circular rock tunnels based on unified strength theory
摘要
Abstract
Based on the unified strength theory and a non-associated flow rule, a new analytical solution for ground reaction curve of a deep circular rock tunnel is presented taking into consideration the integrated effects of the intermediate principal stress, rock softening, dilatancy and a small Young＇s modulus in the plastic zone. The Vlachopoulos＇s formula due to its rationality is adopted to determine the relief ratio of longitudinal deformation of the tunnel. The support pressure differences anticipated from the convergence-confinement analysis between two methods for determining the initial location of support action are discussed. The results show that the influence of the unified strength theory parameter on the ground reaction curve and longitudinal deformation profile of the tunnel is significant. The strength potentials of rock mass are better achieved due to considering the effect of the intermediate principal stress. The effects of Young＇s modulus in the plastic zone and dilatancy on the ground reaction curve are important. The differences of support pressure between two methods for determining the initial location of support action are remarkable.关键词
围岩特征曲线/隧道纵向变形曲线/支护压力/统一强度理论/中间主应力/剪胀Key words
ground reaction curve/longitudinal deformation profile of tunnel/support pressure/unified strength theory/intermediate principal stress/dilatancy分类
建筑与水利引用本文复制引用
张常光,赵均海,张庆贺..基于统一强度理论的深埋圆形岩石隧道收敛限制分析[J].岩土工程学报,2012,34(1):110-114,5.基金项目
陕西省住房和城乡建设厅科学研究项目 （）
陕西省自然科学基金项目(2011JM7002) （2011JM7002）
