Аннотация
To assess the operational reliability of the tunnel structure adjacent to Metro Line 1 station during its active service, we conducted a comprehensive investigation. This investigation involved the detection and precise measurement of four significant structural concerns within the tunnel: water infiltration, segment misalignment, exposed joints, and lining fractures. We conducted a detailed analysis of the spatial distribution patterns of these structural issues along both the longitudinal and circumferential axes of the intermediate tunnel section. Additionally, we conducted an assessment of the operational condition of segment components and connecting bolts, adhering to established standards. This comprehensive approach allowed us to achieve a thorough evaluation of the overall operational condition of the tunnel.