3D Numerical Modeling of Ground Settlements Caused by Shield Tunneling Across Multi-tracks of Railway

Abstract:

Based on the bid-section of Binhai mass transit from Tianjin Station to Qijing Road Station,3D-FEM is put forward to simulate shield tunneling long distance under multi-tracks of railway.According to the simulation results,settlement of ground surface along and perpendicular to the shield tunnel are analyzed in detail,the discipline of ground surface settlement in different driving stages is uncovered; the disturbance area of ground and the settlement ratio dedicated by first tunnel and second tunnel are studied,the function of railway load in causing ground displacement is also discussed.The results fit well with monitoring data and can be used as a reference for similar projects.

Key words:railway track; shield tunneling; ground settlement; 3D-finite element method; numerical modeling