Study on construction loads during shield tunneling using a three-dimensional FEM model

摘要

This paper reports mainly on lining segment behavior measurement and a three-dimensional FEM analysis of a shield tunnel conducted to investigate the effect of construction loads acting on the segmental lining during shield tunnel excavation. The behavior of the shield tunnel during excavation was analyzed using segmental lining measurement results, and the measurement results in the tunnel-axis direction were used to define the boundary conditions for the FEM analysis. In the three-dimensional FEM analysis, the effects of alignment and boundary conditions on analysis results under assumed conditions were evaluated.