This thesis describes a nonlinear two-dimensional finite element analysis of ground movement around tunnel considering stress paths.
An attempt is made to improve the finite element application of tunnel analysis by accounting for the effects of stress paths. To delineate the effects of stress paths influencing tunnel behavior, both Duncan's hyperbolic model and Drnevich's constrained model were used. The nonlinear FEM analysis considering stress paths has been applied to typical unlined soft ground tunnel section and compared with elsto-perpectly plastic FEM analysis.
It has been shown that the nonlinear FEM analysis considering stres paths might be more proper for analysis of ground movement due to tunnel excavation than the elasto-perpectly plastic FEM analysis.
