Abstract
Buckling analysis of tunnel lining is made by proposing a simple mechanical model. The tunnel lining may buckle when its rigidity is small. This paper shows the buckling load and buckling mode of a tunnel lining which is modeled by elastic bars and rotation springs. The buckling analysis is first carried out on a circular arch under uniform external pressure; the analytical results are then compared with theoretical results in order to check the validity of the method of analysis. Furthermore, an analysis model which considers ground reaction is constructed to study the interaction between the ground and a tunnel lining and to investigate buckling behavior of tunnel lining when its thickness and shape is varied.
