Objective Currently, there are some theoretical explorations of the adjacent diaphragm wall (hereinafter referred to as "D-wall") construction impact on existing metro shield tunnels and the tunnel structural resilience. However, no relevant researches are conducted on the resilience evolution law of metro shield tunnels under adjacent D-wall construction, necessitating in-depth research on this issue.

Method The resilience theory of shield tunnels and the resilience evolution process of shield tunnels under adjacent D-wall construction are elaborated, key influencing factors and resilience performance indicators are analyzed. A finite element calculation model of shield tunnels is established, and 9 working conditions are selected. Taking the maximum horizontal displacement and the maximum bending moment increment induced by the adjacent D-wall construction as analysis parameters, the response characteristic analysis of the shield tunnel is conducted. The resilience evolution laws of shield tunnels under adjacent D-wall construction are revealed, and the determination of resilience indicator values and the resilience evaluation method for shield tunnels are proposed.

Result & Conclusion  During the D-wall construction process, both the tunnel displacement and the internal force characteristic values show a resilience evolution law of initial deterioration followed by slight recovery. The resilience performance of the tunnel decreases with the increase of the tunnel burial depth and increases as the horizontal clear distance between the D-wall and the existing shield tunnel increases.