Effect of long-term settlement on longitudinal mechanical performance of tunnel in soft soil

In this paper, the tunnel longitude deformation curvature is obtained from monitoring data of long-term settlement. Then, the relationship between longitude deformation curvature with the segment inner force and crack of segment joint are concluded. This paper aims at evaluating the performance of tunnel after many years’ service according to the corresponding longitude deformation curvature. The analysis results offer important foundational materials for structural safety and durability evaluation of shield tunnel.