During a Tunnel Boring Machine (TBM) project in Kunming city, Southwestern China the engineering geological conditions encountered at a distance of 7km consisted of folded, faulted, weak rocks, high ground stress and groundwater problems. The problems of collapse, ...

<p>This paper provides an overview of a methodology being used by tunnelling experts, which captures the three-dimensional essentials of tunnel behavior with two-dimensional analysis tools. The methodology allows support designers to start off with reasonable ...