隧道纵向开挖变形位移监测数值仿真分析

Numerical Simulation Analysis of Deformation and Displacement Monitoring during Longitudinal Excavation of Tunnels

隧道纵向开挖变形位移监测数值仿真分析在监测过程中存在位移数据收集失误的情况,检测数值仿真的精准程度较低,在进行仿真的同时需调节位移数据收录系统的监测结构,影响最终的仿真效果。针对此类问题,构建隧道纵向开挖变形位移监测数值仿真模型,根据地基与隧道的模型结构设置参数,进一步调整预测的变形位移监测数据,精准录入收集的监测信息,获取精确度较高的位移数值,并构建数值仿真模型,完成整体数值仿真分析研究。结果可知,该数值仿真分析方法具有较强的监测精准度,在相同的地表数据沉降拟合条件下,监测的地表沉降值与实际值的误差为0.005%,隧道隆起值与实际值的误差为0.001%,能有效监测隧道变形位移状况,具有较强的监测性能。

In the numerical simulation analysis of tunnel longitudinal excavation deformation and displacement monitoring,there are errors in the collection of displacement data during the monitoring process,and the accuracy of the detection numerical simulation is lower.During the simulation,the monitoring structure of the displacement data collection system needs to be adjusted,which affects the final simulation effect.In view of such problems,a numerical simulation model of tunnel longitudinal excavation deformation and displacement monitoring is built,in which,the parameter data is set according to the model structure of the foundation and tunnel,the predicted deformation and displacement monitoring data is further adjusted,the collected monitoring information is accurately input,and the displacement value with high accuracy is obtained.The results show that the numerical simulation analysis method has strong monitoring accuracy.Under the same surface data settlement fitting condition,the error between the monitored surface settlement value and the actual value is 0.005%,and the error between the monitored tunnel uplift value and the actual value is 0.001%,which can effectively monitor the deformation and displacement of tunnel and has strong monitoring performance.