注浆加固对复线隧道滑动面和周边围岩稳定性的影响

Grouting Reinforcement's Influence on Slide Plane and Surrounding Rock Stability in Double_line Tunnel

采用弹塑性有限元法分析了柴家坡隧道在施工过程中注浆加固对滑动面和围岩稳定性的影响。计算结果显示：围岩注浆加固后，塑性滑移区大大减小，滑动面和围岩明显由不稳定状态向稳定性状态转化，同时隧道局部变形也明显减小。文中滑动面作低强度介质处理，采用普通四节点等参元。

This paper analyses grouting reinforcement's influence on slide plane and surrounding rock stability during the construction in Caijiapo tunnel,using the elastoplastic finite element method.The calculated results show that,after the surrounding rock is grouted,the area of the pastic slide region is greatly reduced, the slide plane and surrounding rock obviously turn into the stae of stability,and the local deformation of the tunnel is obviously reduced.In the paper, the slide plane is dealed with a low-intensity medium,and the common four-node isoparametric finite elemenl is adopted.