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Alpine
  Date 2010
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Change: Project & Legal Perspectives
14 December, 2010
Nigel Legge of Nigel Legge Associates and Iain Suttie of Berwin Leighton Paisner look at what constitutes change technically and how factors likely to give rise to major change can be anticipated, managed and mitigated. From a legal perspective it also reviews how engineering contracts categorise change and take account of its impact on cost and programme. This is the first of two articles on change.

Crossrail running tunnels award
10 December, 2010

The unforeseen struggle in the south
06 December, 2010
Unexpected squeezing, rockbursting and heat made the southern contracts exceptionally difficult testing both human and technical capabilities

Gotthard – first of the 21st century tunnels
06 December, 2010
Gotthard’s progress has been dictated by complex geology and the limits of rock tunnel technology as well as social and political issues before and during construction

Keeping the timetable on track
06 December, 2010
Following tunnel breakthrough civils work continues on inner linings and walkways, which complete only in 2014. But focus is already switching to the fit-out of the tunnels

Deep down and squeezed tight at Sedrun
06 December, 2010
South African gold mine shafts, German coal seams, World War U-boat construction and Swiss mountain railways all helped on the difficult Sedrun section

Record drives at Amsteg and Erstfeld
06 December, 2010
The two drives for the northern section of Gotthard made the fastest progress including a world record TBM day rate. But they were not without their problems

Making Gotthard happen
06 December, 2010
Breakthrough on the Gotthard base tunnel in mid-October is a major landmark on the world’s biggest underground project. It follows a decade of staggering geological, technical, political and workface challenges, says Adrian Greeman

Drilling Rohtang
11 November, 2010
Dywidag International has started excavation at the Rohtang Pass road tunnel in Himachal Pradesh, India. Report by Patrick Reynolds

Advantages of pre-injection grouting
19 October, 2010
The pre-injection method, or injections ahead of the excavation face in underground construction can in many situations offer significant advantages, particularly in difficult ground conditions like water ingress or mechanically poor ground or soil. K. G. Holter and H. O. Hognestad of BASF Meyco look at the use of modern cost-effective methods and material technology for pre-injections in shallow tunnels

The Gotthard Base Tunnel and Sedrun
11 June, 2010
At the March meeting of the British Tunnelling Society Hans Bartschat and Michael Gutzeit of Bilfinger Berger’s Tunnelling Division reviewed the new Gotthard Base Tunnel project, and in particular, the Sedrun section of what will be the longest transport tunnel in the world.

Securing the Gotthard Road Tunnel against salts
10 June, 2010
Salt water and concrete form a potentially lethal cocktail. When the salt is washed off winter roads and seeps into the pores of tunnel roofs and walls, danger lies ahead: dissolved chlorides in the water attack the steel inside the concrete. In this report, edited from that supplied by Wacker Chemie, action to protect the Gotthard road tunnel against is problem is described.

Danish dash
18 May, 2010
More metro for Copenhagen and a possible undersea link to Germany are the new major plans involving tunnels in Denmark. Report by Patrick Reynolds

Devil’s Slide diversion drive
23 March, 2010
A bypass tunnel on the scenic California coast is well advanced to avoid the Devil’s Slide landslide area on the famous scenic Highway One route, reports Adrian Greeman

Meeting shotcrete specifications
23 March, 2010
In the long history of shotcrete, or sprayed concrete, linings underground, never has so much been expected of them. In the transition in scope from hard rock primary support to soft ground permanent support, shotcrete is now expected to create structures under even more demanding conditions, but still at comparatively low cost. Here technical editor Maurice Jones reviews the state of some developments designed to meet such demands