隧道坍方动态分析与综合预警方法研究

Study on dynamic analysis and comprehensive warning method of tunnel collapse

利用监控量测资料开展隧道坍方预警是防止工程灾害的重要途径。在典型坍方变形监测曲线特征分析的基础上,总结归纳出坍方变形的四个阶段,建立以累积变形量、变形速率、变形加速度为指标的定量预警模型,确定基于坍方前兆的安全管理等级。将定量监测与定性现象相结合,建立隧道坍方综合预警模型,并将其应用于雅康高速公路隧道工程中。应用结果证明,本研究建立的塌方预警模型具有较好的准确性和工程实用价值。

It is an important way to prevent engineering disaster by using monitoring data to carry out tunnel collapse warning.On the basis of characteristic analysis of typical deformation monitoring curves,four stages of collapse deformation were summarized,and a quantitative early warning model with accumulated deformation,deformation rate and acceleration as the index was established.Then the level of safety management based on collapse precursor was determined.Combining quantitative monitoring with qualitative phenomena,a comprehensive early-warning model of tunnel collapse was established,which was applied to the tunnel engineering of Yakang Expressway.The application results showed that the model possessed better accuracy and practical value.