Application of Automated Monitoring Technology in the Stability Assessment of Metro Tunnels
Abstract：To ensure the operational safety of metro tunnels, this paper studies the application of automated monitoring technology in tunnel stability assessment. By establishing a multi-source sensor monitoring network, devices such as fiber Bragg grating sensors and three-dimensional photoelectric sensors are deployed to monitor tunnel structural deformation, stress-strain, and surrounding rock pressure parameters in real time. An evaluation index system containing three dimensions—safety, serviceability, and durability—is constructed, and the stability assessment is conducted based on a fuzzy neural network model. Application in a metro tunnel project in Shanghai shows that tunnel structural deformation is significantly affected by changes in groundwater level, with a maximum cumulative settlement reaching 15.8 mm, and the surrounding rock pressure increased by 25% compared to the design value. After reinforcement treatment, the settlement rate was controlled below 0.05 mm/d, and the accuracy of the evaluation model exceeded 90%. This automated monitoring technology system can accurately assess the stability state of tunnel structures and provide references for the safe operation and maintenance of tunnels.
Keywords：Automated MonitoringMetro TunnelStability AssessmentEarly Warning Model
Publication Date：2025-11-25
Pages：4( 45-48 )