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隧道围岩状态随着隧道施工不断发生变化,新奥法施工采用现场监控量测对围岩进行动态监测。通过分析现场监控量测数据,能够判断围岩稳定状态、预测最终变形量、确定二衬施作时机等,反馈施工动态信息为修改设计、指导施工提供依据。结合某浅埋黄土隧道,探讨浅埋黄土隧道监控量测方案,对现场监控量测结果进行处理、分析;同时建立数值分析模型对开挖过程进行模拟分析。通过对比分析现场监控量测数据与数值模拟结果,得到该浅埋黄土隧道的变形规律,为以后类似工程提供参考。
The condition of surrounding rock of the tunnel changes constantly with the construction of the tunnel. The construction of the new Austrian law uses on-site monitoring and measurement to dynamically monitor the surrounding rock. By analyzing the on-site monitoring data, it is possible to determine the stability of the surrounding rock, predict the final deformation, and determine the timing of the second lining. Feedback dynamic construction information can provide basis for modifying the design and guiding the construction. Combined with a shallow loess tunnel, the paper discusses the monitoring and measuring program of shallow-buried loess tunnel and analyzes the results of on-site monitoring and measurement. Meanwhile, a numerical analysis model is established to simulate the excavation process. Through comparative analysis of on-site monitoring measurement data and numerical simulation results, the deformation law of the shallow-buried loess tunnel can be obtained, providing reference for similar projects in the future.