基于隧道“无人化”立拱动态施工的围岩变形

为了更好地服务于新乌鞘岭隧道“无人化”立拱施工的需要,确定围岩在动态施工中的变形规律具有重要意义。通过对现场监测数据进行统计回归分析,在文献16]的研究基础上给出了围岩拱顶沉降在动态施工中的解析解。并结合FLAC3D专业岩土数值分析软件,验证了数值模型的正确性,同时模拟了围岩在真实时间下的施工力学响应,得到了立拱断面中拱顶与两侧拱脚在隧道开挖、立拱以及喷射混凝土等过程中的变形规律。以期为后续的新乌鞘岭隧道“无人化”立拱专项研究提供基础。

Study on Self-Stability Time of Surrounding Rock Based on Tunnel

To better serve the needs of the "unmanned" arch erection construction of the Xinwushaoling tunnel, it is of great significance to determine the deformation law of surrounding rock in dynamic construction. Through statistical regression analysis of field monitoring data, the analytical solution of surrounding rock vault settlement in dynamic construction is given based on the research in Reference 16]. Combined with FLAC3D professional geotechnical numerical analysis software, the correctness of the numerical model is verified. Meanwhile, the construction mechanical response of surrounding rock in real-time is simulated, and the deformation law of vault and arch footing on both sides in the arch erection section during tunnel excavation, arch erection and shotcrete is obtained. It is expected to provide the basis for the follow-up special research on the "unmanned" arch erection of the Xinwushaoling Tunnel.