Abstract: This paper presents a case history of the impact of shielded tunnel excavation on the Jiaoji Rail line embankment and viaduct structures. The displacement of the viaduct and the subsidence of the embankment are predicted by the numerical analysis. The shielding design scheme could be adjusted by the analysis results. The numerical analysis indicate that, both the ground subsidence and the pile vertical displacement are met the requirement of maximum 15 mm. The soil improvement on the soil above the shielded zone can meet the construction requirement.

Key words: Shielded Tunnel, Railway Embankment, Viaduct Piers, Numerical Simulation, Ground Subsidence, Predicted Values