Page 206 - Numerical Analysis and Modelling in Geomechanics

BACK ANALYSIS OF GEOTECHNICAL PROBLEMS 187

Figure 6.12 Contour lines of the square root of the second invariant of the deviatoric
plastic strains for the modified construction procedure (G denotes the grouted zone
representing the foundation of the tunnel crown).

Figure 6.13 Comparison between the vertical displacements obtained by the elasto-plastic
analyses of the original and modified construction procedures.

respect to those used in the previous calculations. The other characteristics of the
analysis (e.g. sequence of excavation/loading steps, material model, values of the
material parameters, etc.) are unchanged.