1994 Volume 4 Pages 41-46
The characteristic curve method is often used in analyzing a portion around cutting face by plane strain condition. Generally speaking, the axisymmetric analysis of tunnel is used as preliminary analysis of the characteristic curve method. Axisymmetric analysis, however, is not always suitable for shallow tunnels, because it assumes that the action of the load on tunnels is axisymmetric. Now, in this paper, the authors analyzed the difference of displacement curves of tunnel walls between unlined and lined tunnels with non-axisymmetric analysis, comparing them with the case of axisymmetric analysis.
