Search Results: 'Buchan '

High pressure drive crosses the Thames
01 July, 2004
Constructing the 2.4km long, 3m i.d. Dartford Cable Tunnel under the River Thames has proved a testing experience for UK contractor Amec. T&TI editor, Tris Thomas, recently visited the site and discovered how the team dealt with chalk under 3.5 bar water pressure without compressed air, an innovative shaft lining and a severely damaged cutterhead - all with little effect on the schedule

Flexible shield proves its worth
01 March, 2004
The 17.4km long Hofoldinger Tunnel is the final link in Munich's southern water supply chain. The tunnel is being bored through extremely mixed ground using an innovative combination of tunnelling methodologies. Dipl -Ing. Christian Stahn and Dipl- Geol. Ulrich Ferstl of contractor Bilfinger Berger explain