【作者】 陶波； 伍法权； 张建南； 钱卫平； 郭改梅；

【Author】 TAO Bo~(1,2),WU Fa-quan~2,ZHANG Jian-nan~1,QIAN Wei-ping~3,GUO Gai-mei~1 (1.Geological Construction Engineering Group Corporation of Guangdong Province, Guangzhou,Guangdong 510080,China; 2.Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China; 3.The first Survey and Design Institute of China Railway,Xi’an,Shanxi 710043,China)

【机构】 广东省地质建设工程集团公司； 中国科学院地质与地球物理研究所； 铁道第一勘察设计院；

【摘要】 在高地应力环境下的软弱围岩中修建深埋长隧道,软弱围岩层面特征控制着围岩变形破坏机制。基于乌鞘岭深埋长隧道千枚板岩层物理力学参数的数值位移反分析结果,研究了在高地应力条件下层面对深埋长隧道围岩变形的控制作用。研究结果表明:墙腰的位移均随岩层倾角的增大而减小,当倾角较小时,墙腰位移随倾角变化速度较快,而倾角较大时,则变化速度趋缓。拱顶位移整体上表现为随倾角的增加而增大,当倾角较小时,拱顶位移的增长速度较慢,反之,增长速度有所加快。岩层倾角小于45°时,墙腰位移随岩层走向与洞轴线夹角增加而以较快的速度减小,拱顶位移变化较小;岩层倾角大于45°时,墙腰位移随岩层走向与洞轴线夹角增加而仅有小幅度的增加,拱顶位移随岩层走向与洞轴线夹角增加而以较快的速度减小。更多还原

【Abstract】 When deep-buried long tunnel is constructed in soft rock under high crustal stress,deformation and destroy mechanism of wall rock is controlled by bedding plane character of soft rock.Based on displacement back analysis of phyllite slate bedding plane the physical and mechanical parameters of deep-buried long Wuqiaoling tunnel were investigated by numerical method.This paper studied bedding planes controlling role on soft wall rock deformation of deep-buried long tunnel.Displacement of the middle part of wall decreases with increasing of rock strata dip angle,but displacement of tunnel top increases with growth of rock strata dip angle.When the angle between rock strata strike and tunnel axial line(Φ) is little,displacement of tunnel top is large,which is disadvantageous to stability of tunnel.When rock strata dip angle is less than 45°,displacement of the middle part of wall decreases with growth ofΦby great velocity,while displacement of tunnel top little changes.When rock strata dip angle is more than 45°,displacement of tunnel top fast decreases with increasing ofΦ,while displacement of the middle part of wall little increases.更多还原