龙井隧道围岩大变形类型及特征研究

Research of Types and Characters of Deformation of Great Wall Rock Distortion of Longyan Tunnel Engineering

隧道工程围岩大变形已是困扰地下工程界的一个重大问题,引起了地下工程界的高度重视。忠万高速公路龙井隧道地质条件复杂,穿越煤系软弱夹层,地下水发育,在隧道施工过程常发生大变形,其变形具有初始变形速率大、变形持续时间长和最终变形量大的特征。由于施工前对围岩大变形的危害有足够认识、而且施工措施得当,没有造成大规模的塌方。通过对龙井隧道施工过程中围岩大变形产生的原因、机理及支护技术的分析研究,提出了引起围岩大变形的受控因素及变形类型,对今后类似隧道大变形的预测和防治具有参巧意义。

Great wall rock distortion of tunnel engineering is the major problem of underground engineering,attractinggreat attention of the underground engineering. Crossing coal measure and rich groundwater strata,the Longjing Tunnelin Zhongwan Highway has large deformation. Its deformation has highspeed,longtime and large deformation features. Byenough understanding and reasonable construction measures of large deformation,there is no big size of landslide duringconstructing. Through the analysis of the causes and mechanism of large deformation of surrounding rock in tunnelconstruction process and the research of the mechanism and supporting technology,put forward the control factors andthe type of deformation of large deformation of surrounding rock,has great significance for deformation prediction andprevention for the great wall rock distortion of tunnel engineering in future.