Shield tunnel segment bolt looseness monitoring method and monitoring system

The invention relates to the technical field of shield tunnel health monitoring, in particular to a shield tunnel segment bolt looseness monitoring method and a shield tunnel segment bolt looseness monitoring system.The shield tunnel segment bolt looseness monitoring method comprises the steps that a parallel connection circuit is arranged; a hierarchical monitoring system composed of the interface terminal, the single-ring terminal, the monitoring node and the monitoring terminal is formed, the loosening condition of the locking piece in the tunnel can be obtained through the difference value between the test resistance value and the health target value of the monitoring terminal, the locking piece in the tunnel can be monitored in a partitioned and segmented mode, the monitoring workload is reduced, the monitoring accuracy is improved, and meanwhile the monitoring efficiency is improved. When an abnormal condition occurs, the position of the abnormal locking piece is determined step by step through grading