Three-dimensional finite difference analysis of shallow sprayed concrete tunnels crossing a reverse fault or a normal fault: A parametric study

摘要: Urban tunnels crossing faults are always at the risk of severe damages. In this paper, effects a reverse and normal fault movement on transversely shallow shotcreted tunnel investigated by 3D finite difference analysis. After verifying accuracy numerical simulation predictions with centrifuge physical model results, parametric study is then conducted. That is, various parameters such as sprayed concrete thickness, geo-mechanical properties soil, depth, plane dip angle studied displacements ground surface structure, plastic strains soil mass around tunnel. The results each case faulting independently discussed compared other. It obtained that deeper show greater for both types faulting.