Comparison of the maximum cyclic change of bending moment resulting from this study for the (a) shallow and (b) deep tunnel with the experimental ones from centrifuge tunnel tests performed by Lanzano et al. (2012) and corresponding numerical predictions (* signifies experimental results found in the paper by Lanzano et al. (2012); ** signifies the mean value of numerical interpretations of centrifuge tests found in the papers by Amorosi et al. (2014), Gomes (2014), Hleibieh et al. (2014) and Tsinidis et al. (2014))