广巴高速某隧道不同岩性围岩变形特征分析  

Analysis on the Rock Deformations of a Tunnel on Guangyuan-Bazhong Expressway

作　　者：张爽 刘庆新 胡力耀 关惠平[3] 李鹏飞 

机构地区：[1]中油管道建设工程有限公司,廊坊065001 [2]中国石油工程建设公司,北京100011 [3]成都大学城乡建设学院,成都610106 [4]中油郎威监理有限责任公司,廊坊065000

出　　处：《现代隧道技术》2011年第1期17-21,共5页Modern Tunnelling Technology

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.

关 键 词：公路隧道 岩性变化 变形特征 稳定性分析 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]