Numerical Study of the Impressionability of Ground Settlement due to Excavation of Tabriz Metro Tunnel, Line 2, from the Coefficient of Lateral Earth Pressure (K0)

In this research, ground settlement due to mechanized excavation of the Tabriz metro tunnel, line 2, has been studied and the effect of the K0 parameter, coefficient of lateral earth pressure, has been discussed using finite difference method and modeling with FLAC 2D software considering different values of K0 parameter (0.25, 0.5, 0.75 and 1). The results of numerical model were verified according to real settlements measured simultaneously with tunnel excavation. The results show that in general, ground settlements due to tunneling decreases exponentially with increasing of the K0 value.