Abstract:

A three-dimensional quasi-dynamic nonlinear finite element simulation for shield-driven tunnel excavation under the shallow coverage of soil is conducted using a commercial software ABAQUS. The work is carried out according to the actual construction process of the super-large slurry balance shield tunnel and based on the Yangtze River Tunnel project. The simulation model properly takes into account the interactions between soil and shield, soil and grouting material, grouting material and line in the construction process. The results of the simulation are compared with the field measurements, which indicates that the simulation method is valid.

Key words: super-large slurry balance shield; construction under the shallow coverage of soil; analysis for the deformation of soil; three-dimensional nonlinear finite element simulation