Search Results: 'VMT'

Precision measuring for segment moulds
01 October, 2004
The precision required for the manufacture of moulds used for the casting of tunnel lining segments is frequently not stated; the tender documents for a typical segmentally lined tunnel project only giving the dimensional tolerances for the finished segments. In some cases however, only the tolerances for a sample build of two test rings is given.

Investigation & Monitoring products
01 August, 2004

Long distance pipe jacking in Asia
01 July, 2004
Jim Broomfield discusses the importance of automatic bentonite pipeline lubrication systems in achieving a low friction coefficient during pipejacking, using recent Asian project successes as examples

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

TBM development at the Weser Tunnel
01 March, 2004
Boring the 1.6km long twin-tube Weser Tunnel in northern Germany proved an exacting task for the construction team. The alignment's geology and hydrogeology pushed Mixshield TBM technology to, and beyond, its limits. Claus Wirtz of the construction JV leader, Hochtief, explains the project's challenges and how they were overcome