Abstract
During the construction of a shallow overburden tunnel using NATM on soft ground, a phenomenon of equal settlements of the surface, crown and foot of tunnel called an accompanied settlement occurred. FRSP (Foot reinforcement side pile) was utilize to control the ground accompanied settelement and it had been reported that it could prevent ground subsidence effectively. In this study, 2-D elasto-plastic FEM numerical simulation of the shallow overburden tunnel on the soft ground is carried out to discuss the accompanied settlement and the effect of FRSP. In consequent, the FRSP can prevent the ground accompanied settlement with the effect of increasing shear reinforcement, earth pressure when FRSP crosses the shear slide line.
