隧道变形监测异常数据判识研究

Research on Identification of Abnormal Data of Deformation Monitoring in the Tunnel

本文基于软岩、硬岩隧道施工期台阶法、塌方围岩变形现场监测数据资料,选取两种情况下最具代表性的隧道变形时态曲线,采用统计归纳与比较分析的方法,针对两种情况隧道变形曲线上扬段线型特征及相关变形数据重点分析,总结出软硬岩隧道台阶开挖、塌方引起监测"异常数据"判识参考依据:软硬岩塌方前引起的变形速度呈单调递增趋势,加速度会呈整体递增趋势(非单调递增),台阶法在相应上扬段引起的变形速度趋势为递增但非单调关系,曲线加速度非递增趋势,而是在某一值附近波动。以上可以作为隧道塌方预测的一种现场监测数据分析方法,可供类似隧道工程现场监测管理工作提供参考。

Based on the soft rock and hard rock tunnel construction period step method and collapsed surrounding rock deformation field monitoring data,this paper selects the most representative tunnel deformation temporal curve,using statistical induction and comparative analysis methods,the two cases of tunnel deformation curve focuses on linear features up segment and related deformation data.Summarize the reference basis for identification of monitoring"abnormal data"caused by the excavation and collapse of soft and hard rock tunnels:The deformation speed caused by the soft and hard rock before the collapse shows a monotonous increasing trend,and the acceleration will show an overall increasing trend.The deformation speed caused by the step method in the corresponding uplift section is increasing but not monotonous.The curve acceleration is not increasing,but at a certain Fluctuates around the value.The above can be used as an on-site monitoring data analysis method for tunnel collapse prediction,and can provide references for on-site monitoring and management of similar tunnel projects.