Tunnel Safety Assessment

Based on the concrete structure design code this book established the elastoplastic damage model of the long-acting tunnel lining structure by dynamic theory. This book took the culvert of the Shitai Expressway Wumengshan No. 2 Tunnel and Nanjing Metro Super Small Clear Distance Tunnel as the engineering background. According to the actual excavation sequence and construction technology the variation characteristics of stress field deformation field and plastic zone of surrounding rock and supporting structure in excavation process and blasting design during construction were simulated to assess the safety of engineering.