Abstract
Shield technology is widely used in subway excavation projects, and the excavation of soil causes surface settlement, which affects the normal use and safety of the tunnel itself and surface buildings. Using Abaqus, a large general-purpose finite element software, a three-dimensional excavation finite element model of the shield tunnel is established, and the dynamic excavation process of the shield tunnel is finely simulated to derive the soil displacement settlement law during the shield excavation, and to discuss the influence of the change of the simulated values of the post-shield grouting pressure and support pressure on the maximum settlement (uplift) of the ground surface. The conclusions of the study have important theoretical and practical engineering significance.
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