Prediction for Long-Term Deformation of Existing Tunnels Induced by Underground Excavation in Shanghai Subway Project

Zhi Guo Zhang; Meng Xi Zhang; Xiao Xiao

doi:10.4028/www.scientific.net/AMM.353-356.1390

Paper Titles

Design of Blasting Scheme Based on Numerical Simulation
p.1364

Risks of TBM Construction and Corresponding Measures
p.1370

Finite Element Analysis of Creep Induced Volume Shrinkage of Salt Caverns
p.1379

Study and Application of PBA Tunneling Technology in Shenyang Metro
p.1386

Prediction for Long-Term Deformation of Existing Tunnels Induced by Underground Excavation in Shanghai Subway Project
p.1390

Research on Mechanical Behavior of Pipe-Roof Reinforcement Applied in Tunnel Based on MATLAB
p.1394

Research on High-Efficiency Rock Fragmentation of TBM Cutter-Head
p.1398

Computational Fluid Dynamics Simulation of Ventilation Effect of a Large Cross-Section Cable Tunnel
p.1404

Model Test Study on a Large-Section Cable Tunnel
p.1411

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 353-356Prediction for Long-Term Deformation of Existing...

Prediction for Long-Term Deformation of Existing Tunnels Induced by Underground Excavation in Shanghai Subway Project

Abstract:

The long-term deformation behavior for existing underground structures induced by tunneling is a hot problem which engineers designing and practicing in urban subway engineering encounter more frequently than in the past. Based on the Shanghai Railway Transportation project, the long-term deformation of existing tunnels caused by underground excavation is proposed considering soil consolidation by 3D consolidation finite element numerical simulation method. The maximum consolidation deformation values for service Line 4 are obtained within the time span of thirty years after the tunneling excavation is completed. Furthermore, comparisons between numerical simulation results and the field data are conducted according to site investigations. It is concluded that the calculated consolidation displacements are in general consistent with the observed shapes and the soil consolidation has a significant influence on the deformation behavior of existing tunnels during the service process.