珠藏洞隧道施工安全监测与评价

Safety Monitoring and Evaluation for Zhuzangdong Tunnel Construction

为了保证谷城至竹溪高速公路珠藏洞隧道开挖过程中的施工安全,在优化围岩变形的监测方案与预警方法的基础上,对典型监测断面位移量测数据进行了回归分析。分析结果表明,隧道监测断面拱顶沉降和边墙收敛位移累积值均明显小于警戒值,隧道开挖后围岩稳定性较好;隧道围岩变形量和稳定时间与隧道埋深和地质条件密切相关,埋深越大或岩体质量越差,变形越大。

To ensure the construction safety of Zhuzangdong Tunnel in Gucheng-Zhuxi Highway, the monitoring programs and early warning methods for surrounding rock deformation are optimized, and the measured deformation data of typical monitoring sections are analyzed through regression method. The results show that： （a） the accumulated displacement of vault settlement and sidewall convergence are obviously less than safety warning value, and the surrounding rocks are stable after tunnel excavation; （b） the surrounding rock deformation and stability time are closely associated with the tunnel buffed depth and geological conditions, and will be increased with the increase of buffed depth and the degeneration of rock quality.