Study on Transverse Deformation Characteristics of a Shield Tunnel under Earth Pressure by Refined Finite Element Analyses

We establish an elaborate numerical model with which to investigate the deformation characteristics of segmental lining. The contains reinforcement and connecting bolts that previous studies have generally neglected. validated parameters using a full-scale test result. Based on this model, we studied Convergence, joint deformation, bolt stress, stress were systematically analyzed under different loading conditions. Furthermore, discuss relationships between convergence opening, opening. lining are revealed. When is deformed by earth pressure, plastic hinges form at joints. segment rotates around hinge, main reason for pressure. Horizontal single index reflect tunnel rings, representing overall ring certain extent but not joint. conditions differ, relationship opening horizontal consistent some joints inconsistent others.