基于监测数据回归分析的隧道围岩稳定性分析

Stability Analysis of Tunnel Surrounding Rock Based on Regression Analysis of Monitoring Data

在分析隧道围岩变形破坏机理的基础上,在中条山隧道选取两个有代表性的监测断面分别开展围岩的监控量测工作,对收集的数据进行回归分析,结合拱顶下沉与周边位移变形曲线的变化趋势,指出采取对数函数可较好地拟合监测断面的拱顶沉降和周边收敛数值,表明Ⅲ级围岩监测断面稳定性良好,Ⅳ级围岩监测断面经加固后逐步稳定。

On the basis of the analysis of the deformation and failure mechanism of the surrounding rock of the tunnel,this paper selected two representative monitoring sections of Zhong-tiao Mountains Tunnel to carry out the monitoring and measurement work respectively,and the regression analysis was performed on collected data.Combined with the crown settlement and the change trend of the surrounding displacement curve,it was indicated that the logarithmic function could better fit the crown settlement and surrounding convergence value of the monitoring sections,which showed that the monitoring section of levelⅢhas good stability and the monitoring section of levelⅣwas gradually stabilized after the reinforcement.