TBM in karstic features. Investigation of karstic system and hydrodynamics. Methods surveys results.

This paper explores possibilities to quantify key parameters for rock mass excavatability in drilling, blasting and cutting by TBMs and roadheaders.

Three tunnels for hydraulic purposes were excavated by tunnel-boring machines (TBM) in mostly hard metamorphic rocks in Northern Italy. A total of 14km of tunnel was surveyed almost continually, yielding over 700 sets of data featuring rock mass characteristics ...

The paper discusses continuum and discontinuum modelling in tunnel engineering. A brief review of fundamentals is presented in connection with the use of closed-form solutions and computer based numerical methods. A few remarks are derived on the choice of ...

An engineering geological assessment with respect to the TBM excavation, within a highly heterogeneous system of formations known as the "Athens Schist" is presented. The method considers mainly the rock mass competence on the basis of criteria related to ...

<p>The focus of this paper is too list the required information for the design of a TBM and focus on the selection of the EPB or Slurry TBM method of face support based on the conditions of the project, from geology, alignment restrictions and local knowledge ...