Search Results: 'Mitsubishi'

Which ever way you slice it
27 December, 2012
It is easy to get ‘tunnel vision’ in examining the possible methods of excavation. If engineers were happy with that then disc and roller cutters for hard-rock TBMs would never have been developed as an alternative to drill and blast. Maurice Jones asks what has been tried before and what might still be valid

High pressure sea crossing
18 October, 2012
A slurry TBM is cutting through the sands deep under Zhanjiang Bay, China, to provide a crucial water link to and island steelworks. A tight schedule and a 42m head of water are upping the pressure on the project. Tunnels editor Jon Young visits the site

ESP filtration use and developments
08 February, 2012
Mountainous Japan was the first country to use electrostatic precipitators to filter tunnel air. Arnold Dix of the University of Western Sydney and Atsushi Katatani of Panasonic Ecology Systems give a history of the improvements and use of ESPs in Japanese tunnels