The Influence of Degradation of Shear Modulus of Soil on Predicted Railway Vibrations in Tunnels Excavated With Tbm: A Numerical Analysis

Abstract

Abstract. In this paper the influence of the stress state within the soil on predicted railway vibrations in tunnels is studied, regarding Gs modulus degradation that occurs when the tunnel is excavated with Tunnel Boring Machine (TBM). The adopted procedure is uncoupled, using a 2D FEM model to simulate the process of tunnelling which incorporates the constitutive model known as Hardening Soil with small strain stiffness (HS-small