摘要
通过对某隧道右线典型断面监控量测数据的回归分析,结合该隧道围岩性状的变化,阐述了泥岩和砂岩两种不同岩性围岩变形随时间变化的基本规律,并建立模型分析了其动态变形特征。根据该隧道围岩具有急剧变形和缓慢变形两个明显阶段的特点,在分析和评价围岩稳定性的基础上,预测了与实测结果基本吻合的二次衬砌的施作时间,并通过ANSYS进行了验证。结果表明,应力对岩体稳定时间的影响与模型稳定时间吻合。
After regression analysis on the monitored data of a typical cross-section of right-line tunnel and considering the variation of tunnel rock lithologies,the basic deformation variation regulations of mudstone and sandstone with time were revealed,and a new model for dynamic deformation analysis was established.The predicted time for casting the secondary lining of the tunnel was identical with the measured data,which was based on the analysis and evaluation on the stability of surrounding rocks according to their two distinct stages of rapid deformation and slow deformation.It was verified by ANSYS software that the influence of stresses on stability time of rock mass agreed with that obtained by the established model.
出处
《现代隧道技术》
EI
北大核心
2011年第1期17-21,共5页
Modern Tunnelling Technology
关键词
公路隧道
岩性变化
变形特征
稳定性分析
Expressway Tunnel
Lithology variation
Deformation characteristics
Stability analyses
