Safety monitoring system for covered-excavation tunnel structure

The invention discloses a safety monitoring system for a covered-excavation tunnel structure. The safety monitoring system comprises steps as follows: (1), reinforcement stress monitoring sensors are mounted during construction of a primary support structure or after construction of the primary support structure; (2), expansion bolt construction is performed on the surface of the primary support structure; (3), tunnel convergence monitoring sensors are mounted; (4), the reinforcement stress monitoring sensors and the tunnel convergence monitoring sensors are connected with data acquisition equipment respectively; (5), the data acquisition equipment is in data connection with a computer monitoring controller. The safety monitoring system for the covered-excavation tunnel structure monitors the covered-excavation tunnel structure only subjected to construction of the primary support structure, acquires parameters of the primary support structure in real time and analyzes whether the primary support structure is