尖尖山隧道顺层偏压出口段大变形施工控制技术研究

Construction Control Technology for Large Deformation in the Bedding Bias Exit Section of Jianjianshan Tunnel

尖尖山隧道出口段围岩在施工过程中不断变化,施工破坏了原始地层的稳定性,隧道支护结构和周围地层发生变形。监控量测方案的具体实施,准确提供了位移数据,及时反馈位移变化信息,指导了施工方案的实施。当采用合理开挖支护方法、注浆工艺等加固措施后,变形得到有效的控制。

In the construction process, the surrounding rock in the exit section of Jianjianshan Tunnel is constantly chan- ging, and the stability of the original strata is destroyed. This will led to deformation of the tunnel supporting structure and its surrounding strata. The specific implementation of the monitoring measurement scheme can accurately provide the displacement data, feedback the change information in time, and guide the implementation of the construction project. Effective control of deformation is obtained when the rational excavation supporting method and grouting technology are adopted.