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  Date 2014
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Alice in Auckland
18 December, 2014
Rhian Owen reports on the Waterview Connection project in Auckland, New Zealand

Antipodean Anxiety
18 December, 2014
Hailed as one of the world’s top safe-haven, value-retaining economies in recent years, New Zealand has been basking in the warm glow of a successful battle against a crash, but for how long? Rhian Owen reports

Hartbeat
18 December, 2014
Updating the John Hart Generating Station requires a new underground powerhouse. Jesse Schneider of Frontier-Kemper Constructors, ULC, and Tony Dell of SNC Lavalin Power, discuss the proposed design and construction approach for the project.

Romaine Diversion
18 December, 2014
To build a dam for the La Romaine project in Quebec, a joint venture of EBC-Neilson needed to build a river. Donald Proulx, vice president of heavy civil works and mines, business development proposals, for EBC Inc, based in Quebec reports

Tied together
18 December, 2014
Tie-in works of a tunnel twinning project in northern British Columbia required drill and blast excavation of access tunnels leading to interconnection tie-in chambers that were excavated in hard rock to within 3m of the existing pressurised steel lined penstock. Mark Kellaway and Dave Young of Hatch and Hatch Mott Macdonald and Gordon Revey of Revey Associates, Inc., explains the geometrically complex excavation undertaken during a limited shutdown period when the penstocks were depressurized.

Old meets new
18 December, 2014
THE MAYO B project (Figure 1) arose from the need of the Yukon Energy Corporation (YEC) to increase renewable power sources and meet system-wide load demands, while ensuring that diesel consumed to generate electricity was reduced.

Wrapping Farringdon
20 November, 2014
Angelos Gakis was a runner-up for this year’s Harding Prize. This article is based on his paper, ‘Design of a SCL wraparound tunnel utilising a 3 D geological model at Crossrail’s Farringdon Station’.

Innovative Infrastructure Inspection Technologies
20 November, 2014
With aging infrastructure becoming a common problem throughout the United States, time efficient and innovative inspection technologies are needed in order to facilitate infrastructure inspections that can be done rapidly and in-depth with minimal impact to infrastructure operation as cost-effective as possible.

Warsaw metro’s improvements
18 November, 2014
Poland’s capital Warsaw has two million inhabitants, but only one underground metro line. A second line, with 28 stations over 30km, is under construction. The central section of this line is being built under a turnkey contract awarded to the international agp Consortium, made up of contractors Astaldi of Italy, Gulermak of turkey and PBDIM of Poland. Italy’s rocksoil is providing technical assistance to the project, and here describes some of the challenges involved.

Gdansk Double
18 November, 2014
Recent slurry TBM bores in Gdansk were the key challenge to build a new road link. Report by Patrick Reynolds.

Modelling in LA
06 November, 2014
Angel del Amo and Angel Silvestre of Intecsa-Inarsa SA, and Vanessa Prieto an Pedro Velasco of of Itasca Consultores, explore subsidence prediction for the regional connector transit corridor tunnels in Los Angeles.

Model student
06 November, 2014
Numerical modelling offers the tunnelling industry an abundance of advantages. However, there's more than just number crunching involved to replicate and solve a physical problem.

To the extreme
06 November, 2014
Requiring six TBMs to tunnel more than 60km through difficult ground conditions, technical writer Desiree Willis of The Robbins Company explains the various challenges and triumphs at Mexico City’s Emisor Oriente Wastewater Tunnel project

To market
06 November, 2014
The Mexican government is working with the private sector to boost infrastructure development across all sectors. Investment in rail infrastructure over the next four years will further expand the market for tunnelling work in Mexico. Although companies in the US and Canada have already been supplying projects to construct the capital’s metro and sewer system among other development.

Continental commitment
06 November, 2014
A public-private partnership could break ground on a new rail tunnel under the Detroit River, making a freight connection between Canada and the US that would see much of the billions of dollars the two countries trade. Nicole Robinson reports.

In Review
06 November, 2014
In partnership with the Tunnelling Association of Canada (TAC), every October Tunnels & Tunnelling North America publishes the annual TAC regional director’s report. The four directors take a look at the country’s current marketplace for tunnelling and underground construction, as well as milestones over the past year.

Nevada tunnel makes led milestone
05 November, 2014
The Carlin Tunnel is the first highway rated speed tunnel fully lit with LEDs in North America.

Fire Testing of a Composite Sprayed Concrete Lined Tunnel
17 October, 2014
This paper was entered for consideration in the British Tunnelling Society's Harding Prize competition by Leigh Holland of Crossrail. It was given recognition as one of two runners up. Holland looks at the lining design philosophy and testing on London's Crossrail project.

Bangkok metro extension
17 October, 2014
Complex station works, and tunnel drives constrained by logistical and property issues are needed for the Blue Line metro extension in Thai capital Bangkok. Some of the stations are highly visible near the famous old parts of the city. Report and pictures by Adrian Greeman.

Bold decisions
17 October, 2014
The giant of world tunnelling also dominates the list of wealthiest contractors, but key investment decisions are required to determine the future shape of cities, and international partnerships. Tunnels speaks with Paul Jenkins and David Gutteridge of Mott MacDonald