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  Content Type Features
  Date 2010
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Portals and protection
21 December, 2010
Work on construction of insitu concrete portals and installation of water and frost protection (WFP) benefited from a gathering of innovative ideas and systems

Geological challenge
21 December, 2010
Iceland’s complex geology can provide for markedly varied tunneling conditions and sometimes groundwater problems, such as faced on some earlier road tunnels and also more recently at Olafsfjordur Tunnel on the Hedinsfjordur project

Preparing the way
21 December, 2010
With an Icelandic contract, Norwegian tunnel design standards and international bidders, a range of local and foreign engineers were assembled to prepare for construction of the Hedinsfjordur project, which includes the country’s longest road tunnel

Ties that bind
21 December, 2010
A two-tunnel solution was chosen to overcome the coastal mountain barriers of North Iceland to connect the remote, former fishing hub of Siglufjordur with neighbouring Olafsfjordur and beyond

It’s Open!
21 December, 2010
The opening of Hedinsfjordur Tunnel brought myriad celebrations and activities. The eagerly awaited new road link is popular and has strengthened yet further the bonds between the communities of Siglufjordur, Olafsfjordur and towns beyond

Road Tunnels in Iceland
21 December, 2010
Iceland is building more road tunnels, and they are getting longer. The most recent and longest scheme to date, is Hedinsfjordur Tunnel, which has two single tubes totalling 11km. Built by Metrostav-Hafell JV, the tunnels opened to traffic in October

Driving Siglu
21 December, 2010
Siglu Tunnel was the first to complete and the more straightforward of the two bores on the Hedinsfjordur road project but it was not without its own tunnelling challenges

Excavating Olafs
21 December, 2010
Driving the Olafs Tunnel was the longer and the tougher challenge by far of the two road tubes on the Hedinsfjordur project, the main cause being groundwater

Capitalising on competition
14 December, 2010

Breath of fresh air
14 December, 2010
Tunnels often have a bad name for air quality, some deservedly. A new report next year by the World Road Association (WRA), aims to set tunnel air quality standards for a range of airborne pollutants. Dr.Fathi Tarada, co-chairman of the WRA Working Group on Air Quality, Ventilation and Fire, also managing director of Mosen, explains

Winds of change for tunnels environment
14 December, 2010
Improved standards of ventilation, the need for economy and provision for emergencies are all combining to create increased demands on tunnel ventilation design, plant and control. Maurice Jones reviews some of the latest developments

Capital metro expansion
14 December, 2010
In a race against the clock, contractors on the Delhi Metro have had to go ‘all guns blazing’ to make the tight deadlines laid down by the client. Jon Young spoke with Pawan Bhasin of contracting joint venture ITD (Ital-Thai Development)-ITD Cementation about the experiences on contract BC 24

Subcontinent weathers the storms
14 December, 2010
The combination of crowded cities boasting impossibly over-capacity roads with an increasingly energy-thirsty nation has resulted in a number of government-led tunnelling projects made possible by readily available state funding and foreign development loans, Alex Conacher reports

Jet fans: Removing non-conservatism from the CFD modeling
14 December, 2010
The authors, Marco Buonfiglioli, Ian Cowan and Stig Ravn, all of Atkins, Epsom, England, presented a poster at the ISTSS event in Frankfurt am Main, Germany, earlier this year on an improved approach to jet fan performance modelling. This is the full paper

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.

There must be a better way
14 December, 2010
Ground conditions and risk allocation: Combining the NEC Engineering and Construction Contract (ECC) and the Geotechnical Baseline Report (GBR). Article by Randall Essex, director of tunnelling, Hatch Mott Macdonald; and from Mott MacDonald, Richard Patterson, NEC and procurement specialist; Ian Duncan, geotechnical specialist and Andrew Hindmarsh, senior project manager

Boring for buried hydro
13 December, 2010
Two new standardised concepts for pumped storage hydropower systems look set to present major excavation opportunities, and challenges, for the North American tunnelling sector, reports Patrick Reynolds

Seymour Capilano’s successful second chance
13 December, 2010
Two Robbins TBMs overcame challenges in Vancouver’s hard granitic rock while constructing twin tunnels for the Seymour Capilano Water Filtration Project, Robbins technical writer Desiree Willis reports

Choker clearing
13 December, 2010
The City of Edmonton’s Drainage Services Branch starts tunnelling the first of two replacement sewers this fall on the Mill Woods Double Barrel Replacement Project, Nicole Robinson reports

Are we there yet?
13 December, 2010