依托谷城至竹溪高速公路小漩隧道，针对不同围岩段的特点，对隧道地表沉降、洞内收敛变形及拱顶下沉等项目进行了现场监测与分析，研究不同级别围岩变形时程曲线和纵向分布曲线的基本规律。并利用有限元分析软件ABAQUS模拟不同围岩级别隧道开挖过程，将数值模拟结果与现场监测数据结合，分析围岩级别对隧道围岩稳定性的影响。结果表明： 围岩级别越高，隧道开挖过程中地表下沉和洞内变形越大，变形稳定的时间也越长。

The ground surface settlement, convergence and crown settlement of Xiaoxun tunnel Guzhu expressway is monitored and analyzed in accordance with the characteristics of the surrounding rocks of different grades. The basic law of the timedependent curves and longitudinal distribution curves of the deformation of surrounding rocks of different grades are discussed. The excavation process of the tunnel in surrounding rocks of different grades is simulated by means of finite element software ABAQUS, and the influence of the surrounding rock grades on the stability of the surrounding rocks of the tunnel is analyzed by considering the numerical simulation results and the field monitoring data. The study results show that the higher the grade of the surrounding rocks is, the larger the ground surface settlement and the tunnel deformation during tunnel excavation will be, and the longer time it will take for the deformation to become stable.