摘要
通过对广元—巴中高速公路鸡鸣垭隧道洞口段围岩三维变形监测,研究围岩动态变化,提出了水平收敛回归模型和拱顶下沉回归模型,有效地预测洞顶边坡滑动、初期支护破坏等险情,为隧道洞口段安全施工、采取防治措施及确定二次衬砌的施作时间等提供了科学依据。
Through three-dimensional deformation monitoring of surrounding rock in Jimingya Tunnel portal of Guangyuan-Bazhong Expressway,dynamic changes of surrounding rock is studied in this paper.Horizontal convergence model and crown settlement regression model are advanced for effective prediction of sliding slope and preliminary bracing damage,which provides scientific basis for safe construction of tunnel portal and application of control measures and secondary lining.
出处
《路基工程》
2011年第2期129-131,134,共4页
Subgrade Engineering
关键词
隧道围岩
洞口浅埋段
三维变形监测
稳定性
tunnel surrounding rock
shallow section
three-dimensional deformation monitoring
stability
