Study on Crack Propagation Parameters of Tunnel Lining Structure Based on Peridynamics

Abstract

The numerical simulation results utilizing the Peridynamics (PD) method reveal that the initial crack and crack propagation of the tunnel concrete lining structure agree with the experimental data compared to the Japanese prototype lining test. The load structure model takes into account the cracking process and distribution of the lining segment under the influence of local bias pressure and lining thickness. In addition, the influence of preset cracks and lining section form on the crack propagation of the concrete lining model is studied. This study evaluates the stability and sustainability of tunnel structure by the Peridynamics method, which provides a reference for the analysis of the causes of lining cracks, and also lays a foundation for the prevention, reinforcement and repair of tunnel lining cracks.

Numerical Simulation of Surrounding Rock Deformation and Grouting Reinforcement of Cross-Fault Tunnel under Different Excavation Methods

“…The construction of the tunnel that crosses the fault fracture zone is extremely complex due to the challenging conditions on site. Several studies have been conducted on tunnel excavation methods [5][6][7]. Sato and Kumar et al [8,9] have investigated the relationship between fault slip, fault thickness, and surrounding rock conditions to determine the conditions for slippage in tunnels through faults and to develop tunnel construction methods.…”