Abstract
Stress boundary has conventionally been used for the prediction of ground movement during shield tunneling in plain strain two-dimensional finite element analysis. In this study, based on excavated surface displacement boundary input, a ground displacement prediction method was proposed for shield tunneling. The results of the proposed method of 2D and 3D analysis were compared and evaluated with the field measurement. As a result, it was made clear that asymmetrical surrounding ground displacement during curve excavation was able to be simulated with the proposed method and it achieved more precise simulation than the conventional method by stress boundary input.
