利用有限元软件建立隧道开挖正演模型,基于新奥法隧道施工现场实测围岩收敛数据,采用灵敏度分析建立了参数调整算法,利用系统识别方法对隧道围岩弹性模量及水平地应力进行了反演分析,并讨论了初始值的影响.结果表明,系统识别反演分析法具有自适应能力强、反演分析过程收敛计算稳定性好和计算速度快等优点,在隧道及地下工程领域具有广阔的应用前景. The forward modeling of tunnel excavation was established by finite element software. Based on the measured data of surrounding rock mass at the construction site of the New Austrian Tunneling Tunnel, the parameter adjustment algorithm was established by sensitivity analysis. The elastic modulus and horizontal ground stress The inversion analysis and the influence of the initial value are discussed.The results show that the system identification inversion analysis has the advantages of strong adaptability, good convergence stability and high computing speed in the inversion analysis, and is of great value in tunnels and underground engineering have a broad vision of application.