University of Tabriz Journal of Civil and Environmental Engineering 2008-7918 47 89 2018 02 20 Application of the Stress-Strain Curve of Rock Mass to Estimate the Convergence of Deep Circular Tunnels Application of the Stress-Strain Curve of Rock Mass to Estimate the Convergence of Deep Circular Tunnels 1 13 7184 FA Masoud Ranjbarnia Faculty of Civil Engineering, University of Tabriz Nima Rahimpour Faculty of Civil Engineering, University of Tabriz Journal Article 2018 03 11 The prediction of tunnel convergence at great depth is the important factor in tunneling design. A large number of analytical solutions have been presented for circular tunnels. However; it is not an easy task to use them in practice due to their either complexity or difficulty of stepwise computations, particularly when the stress-strain behavior of rock mass is the strain softening. <br />Therefore; in this study, a simple analytical approach is presented to estimate circular tunnel convergence using the stress- strain curve of rock mass located on tunnel wall. This curve is obtained based on values of the principle stresses as well as their variation on tunnel wall due to tunnel face advancement. The prediction of tunnel convergence at great depth is the important factor in tunneling design. A large number of analytical solutions have been presented for circular tunnels. However; it is not an easy task to use them in practice due to their either complexity or difficulty of stepwise computations, particularly when the stress-strain behavior of rock mass is the strain softening. <br />Therefore; in this study, a simple analytical approach is presented to estimate circular tunnel convergence using the stress- strain curve of rock mass located on tunnel wall. This curve is obtained based on values of the principle stresses as well as their variation on tunnel wall due to tunnel face advancement. https://ceej.tabrizu.ac.ir/article_7184_eb3035a2f5e5d03ec56ff2b961712150.pdf