Analytical Solution of Displacement and Stress Induced by the Sequential Excavation of Shallow Twin Noncircular Tunnels in Viscoelastic Rock

Abstract

Abstract Nowadays, excavation of twin noncircular tunnels is becoming increasingly common. Generally, noncircular tunnels or smaller tunnel spacing would result in stress concentration, posing the underground structures subjected to dangerous conditions. ... Practical Applications This study derives the viscoelastic solutions for the stress and displacement of the surrounding rock of shallow buried twin noncircular tunnels. The derivation takes into account the viscoelastic properties of the rock mass, ...