基于现场监控量测的石岩岭隧道施工期围岩稳定性研究

Research on Surrounding Rock Stability of Shiyanling Tunnel Based on on⁃site Monitoring and Measurement

石岩岭隧道不良地质较多,穿越富水地段、两大断层破碎带.针对软弱围岩隧道变形特点,采用超前小导管支护.为研究施工期围岩的稳定性情况,严格开展长期、全面、系统的监控量测,充分监测开挖全过程变形数据,及时反馈指导施工,调整超前管棚支护参数,提出针对性建议.实践表明,监控量测效果较好,围岩结构稳定、完好,为该地段顺利施工提供了重要技术保障.相关经验既可为今后隧道施工设计和参数优化提供调整依据,也能为类似复杂地质条件隧道设计、施工提供一定参考和借鉴.

There are many bad geology in the Shiyanling Tunnel,which crosses water⁃rich areas and two major fault fracture zones.According to the deformation characteristics of the soft surrounding rock tunnel,the advanced small conduit support is adopted.In order to study the stability of the surrounding rock during the construction period,strictly carry out long⁃term,comprehensive and systematic monitoring and measurement,fully monitor the deformation data of the whole process of excavation,timely feedback and guide the construction,adjust the supporting parameters of the advanced pipe shed,and put forward targeted suggestions.Practice shows that the monitoring and measurement effect is good,the surrounding rock structure is stable and the structure is intact,which provides an important technical guarantee for the smooth construction of this section.Relevant experience can not only provide an adjustment basis for tunnel construction design and parameter optimization in the future,but also provide certain references and references for tunnel design and construction under similar complex geological conditions.