摘要
以九岭隧道为背景,通过数值分析研究了围岩物理参数对围岩应力释放的影响,并与九岭隧道施工现场观测的监测数据进行了比较。结果表明:隧道施工过程是一个应力松弛过程,围岩应力释放不是瞬时完成的,是随着掌子面的接近和远离逐步释放的,且围岩弹性模量E和泊松比μ对围岩洞周收敛有很大影响。
Taking the Jiuling Tunnel as the background, the influence of physical parameters of the surrounding rock on stress release was researched using the numerical analysis method and the analysis data was compared with the monitoring data. The comparison showed that the tunnel construction process is a stress relaxation process, in which the rock stress release is not instantaneous finished but release gradually along with the approach and far away from the control side. The rock elastic modulus E and the poisson ratio μ affect greatly the convergence around the cave.
出处
《交通科技》
2008年第3期35-37,共3页
Transportation Science & Technology
关键词
隧道
围岩应力释放
围岩物理参数
tunnel
rock stress release
physical parameters of surrounding rock
