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Current Refinements
  Content Type Features
  Date 2000
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Rail rules for the Swiss
12 December, 2000
Felix Amberg spoke about the overall concept of the Alp base tunnels. Aspects of planning, design and construction were described. The presentation included a detailed appraisal of the 57km long Gotthard base tunnel.

Micro modifications give macro improvements
12 December, 2000
After over 15 years of development, microtunnelling is now practically a mature technology but some improvements are still being made.

Tunnelling Through Cork
12 December, 2000
Contractor JV, Nuttall/Ascon is using unusual techniques during the construction of a 2.6km long TBM driven sewer relief tunnel in Cork City, Ireland. Associate editor, Tris Thomas visited the site and reports on methods and progress to date.

Jet propelled clean up
12 December, 2000
Tunnel renovation includes a wide range of cleaning, maintenance and report works. A typical scheme recently was a 20km long water transfer tunnel in eastern England. But the machine that did it was far from typical, writes Mike Lill of Delta Civil Engineering.

Repair, refurbish or replace?
12 December, 2000
Many tunnels built in the 19th century are still in service, but changes of use, loadings and the gradual deterioration of the structures by modern pollutants has meant that these tunnels require on-going maintenance or complete refurbishment to extend their usefulness. Gareth Mainwaring, principal engineer with Mott MacDonald's underground works and geotechnical team explains

London line up
12 December, 2000

Privatisation timetable
12 December, 2000

Under new management
12 December, 2000
The final choice is being made this month on the consortia taking over responsibility for the now to be privatised tunnel and infrastructure assets of the world's oldest and most complex metro – the London Underground. Mike Winney reports on the tunnel work that might be required.

Operation Dartford
12 December, 2000
Replacing decaying structures in road and rail tunnels is becoming an increasingly significant workload sector. Editor, Adrian Greeman looks at one such project, the renewal of the road deck in the UK's Dartford tunnels.

Mont Blanc fire guard
12 December, 2000
Few refurbishments could have more significance than that for the Mont Blanc tunnel, closed since the devastating fire tragedy last year. Intensive work to rebuild it for safety is starting.

Facing up to the fire issue
12 December, 2000

Looking ahead for stability
14 November, 2000
While TBM technology has made various degrees of rapid face stabilisation possible during excavation, it can be a much more difficult task with open face excavation where TBMs are deemed not suitable. Yet even here ground control is becoming more and more sophisticated.

Predicting squeeze
13 November, 2000
Predicting tunnel squeezing problems in weak heterogeneous rock masses, by Evert Hoek and Paul Marinos. Part one – estimating rock mass strength.

A megascience project
13 November, 2000
The design and construction at Point 1 of the CERN LHC project is described by Ralph Parkin, senior geotechnical engineer, Knight PiƩsold.

The world's largest particle accelerator reaches its limits
13 November, 2000

Giant caverns for minute particles
13 November, 2000
Some of Europe's most interesting tunnel works are under way just outside Geneva, where a major expansion is progressing for the international research centre for particle physics, CERN. Adrian Greeman visited the sites in Switzerland and France for the vast new underground chambers required.

Shanghai metro: close proximity EPB shield tunnelling
13 November, 2000
Bay Ting-hui, senior engineer with the Shanghai Metro Construction Company, describes some precautionary techniques developed from close proximity shield tunnelling for the metro lines One and Two. The soft ground resulted in some optimisation of key parameters and construction techniques. The results illuminate current Chinese expertise.

Cutting edge
13 November, 2000
The first large scale version of the DPLEX eccentric head TBM is being proved on a major project in Japan, reports Susumu Uchiyama, of the tunnelling equipment engineering department of Kawasaki Heavy Industries.

Casting yard facility
13 November, 2000

Hong Kong forges ahead
13 November, 2000
Hong Kong tunnel consultant Ian McFeat-Smith presented a paper on tunnelling risks in Hong Kong to the Singapore ICTUS international tunnelling conference this month. In an edited extract from the paper, he looks at tunnelling work in the special administrative zone for the next decade.