Search Results: 'VMT'

The 2010 Harding Lecture (Part 2)
01 December, 2010
British Tunnelling Society, Harding Lecture, 15th April 2010

Guidance at Gotthard
11 November, 2010
Special requirements for the construction of the running tunnel drives of the Gotthard Base Tunnel meant high demands on the navigation systems of the four TBMs. Due to the need for tunnel works to be carried out in line with the advance, various factors such as line-of-sight, dust, heat and vibration prevented a normal measuring operation. This article by VMT managing director Manfred Messing shows how VMT produced secure navigation of the TBMs by the selection of suitable equipment and a change of measuring methods

Finesse in tough environments
10 November, 2010
Technologies employed underground to ensure positional accuracy have advanced at great pace over recent years. The portable computer, data processor and laser have all but replaced the tape, notepad and pencil. These, together with the introduction of lasers as reference axes and the toughening of electronics, have led to major benefits in productivity. Maurice Jones reviews some of the latest developments

Livorno landfall
19 October, 2010
A string of micro-tunnel drives are being bored to protect the local environment as part of a project to import gas on the Italian coast near Livorno. Report by Patrick Reynolds

Still thrusting forward
17 August, 2010
The jacking of pipes and other structures to create underground space is something of a Cinderella pursuit compared to the more glamorous, ‘sharp end’ activities of TBMs and drilling, yet it occupies an important place in our overall industry. Maurice Jones takes a look at the current state of technical development.

Home run for river clean up
03 August, 2010
Portland, Oregon has had more than its fair share of tunnelling work in recent years, all geared to improving the quality of its waterways particularly the Willamette River. A key and largest stage in this programme has been the East Side Combined Sewer Overflow Tunnel Project, which is now approaching its conclusion after passing several milestones in the development of North American tunnelling. Maurice Jones reports.