Search Results: 'Wirth'

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

On the cutting edge
27 December, 2012
The process of mechanical excavation through dry ground, whether hard or soft, is pretty well understood. For ‘mixed’ ground, of whatever form, it is a different matter, especially if it is deep under groundwater. Maurice Jones reports that there is a consequent rush of TBM cutter development activities to gain the best competitive, and cutting, edge

First TBM delivered for Austrian railway system
12 September, 2012
The first of two TBMs for Austria's Koralm line project, which will provide a new high-speed train route between Graz and Klagenfurt, was delivered in August 2012. The Aker Wirth machines will be in operation by the end of this year, the company announced last week.

New tunnel boring system heads to Australia
10 July, 2012
A new tunnel boring system, the Mobile Tunnel Miner (MTB), is due to arrive at Northparkes Cooper Mine in southeast Australia next month ready for its use in underground mines.

Finishing India’s longest
18 June, 2012
Following tunnel excavation breakthrough last September, and the final blast in April this year, work is continuing on the long and notoriously difficult Panjal railway tunnel in India to complete support lining including some necessary ground reinforcement work. Maurice Jones reports on the latest progress

Einar Bronlund new boss at Aker Wirth
02 March, 2012