松软地层浅埋暗挖公路隧道现场监测分析研究

针对浅埋暗挖公路隧道的特点，对厦门高崎互通下穿嘉禾路隧道进行地表下沉、拱顶下沉、洞内收敛、支撑应力等项目的监测工作。基于监测结果，分析了该隧道围岩和支护系统的变形及受力特点，指出了松软地层中浅埋暗挖隧道开挖影响的时空范围和隧道施工中有效控制围岩变形的措施，并为支护体系的优化提供依据。研究结论丰富了浅埋暗挖思想，并为国内浅埋暗挖公路隧道的设计、施工和监测提供借鉴。

Study of in-situ monitoring of shallow buried tunnel in loose ground

With respect to shallow depth bored tunnel constructed beneath existing Jiahe road, a comprehensive monitoring the mechanical and deformation characters of the tunnel has been performed during construction., including the ground settlement, crown settlement, convergence, steel support stress, etc. Based on the measured data, the deformation and stress properties of surrounding rocks and supporting system are analyzed. The interaction time-space range and the control method in the construction of shallow depth bored tunnel in loose ground are presented. Meanwhile, the real-time monitoring information is applied to optimizing the supporting system. The experience and conclusions will enrich the theory of shallow depth bored tunnel. The results can be adopted in the design, construction and monitoring.