IN SITU CREEP OF A LINEAR VISCOELASTIC ROCK AROUND SOME NON-CIRCULAR TUNNELS: PART Ⅱ. BOUNDARY STRESS AND DISPLACEMENT CONCENTRATIONS

摘要

In the first part of this paper there was obtained the theoretical solution for the stress state and the displacement field around a single cylindrical cavity, at great depth, in a uniform linear viscoelastic rock formation. This part deals with the analysis of the boundary stress state and boundary displacement field. There will be considered the influence of the cross-sectional shape and of the primary stress state. The results are illustrated by a set of representative diagrams.