摘要
基于广义Hoek-Brown准则,并引入罗德参数ξ反映中间主应力的影响,在研究隧道围岩力学性质的基础上,推导出围岩抗力系数公式;并运用于工程实践。讨论在不同ξ及不同埋深条件下,抗力系数的变化规律。由研究结果可知,围岩抗力系数随着ξ的增大逐渐减小;随隧道埋置深度增加而减小。
Based on the generalized Hoek-Brown criterion and through parameter of ξ reflecting the effect of middle principal stress,it deduces rock resistance coefficient K under researching the elastic-plastic mechanics of surrounding rock,and then applied to engineering practice. It discusses the changing rule of rock resistance coefficient K under the condition of different value of ξ and embedment depth. Analysis shows that rock resistance coefficient K decreases gradually with the increase of ξ,while decreases sharply with the increase of tunnel embedment depth.
出处
《科学技术与工程》
北大核心
2015年第5期132-136,共5页
Science Technology and Engineering
基金
湖北省科技厅自然基金重点基金项目(2013CFA110)
中国地质大学(武汉)教学实验室开放基金项目(SKJ2013107
SKJ2014065)资助
