Investigation of the tunnel penetration to the interaction of soil/rock-machine and its indices of cuttability

摘要

To speed up construction of mass transit subway and the popularity rate of sewage, Taiwan's underground excavation works, especially for mechanical cutting cases, show an ascendant tendency. This study presents a generalized solution for underground geological-mechanical interaction. By using dimensional analysis, This model generalizes geological characteristics grouped into three categories: (1) brittle (rock-like), (2) the ductile (soil-like), and (3) brittle-ductile (gravel-like) type with respect to two cutting forces: (1) thrust and (2) torque to evaluate their excavation/penetration rate. Furthermore, the leading cuttability indices can be obtained to enable to assess the underground excavation.