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Ireland's Limerick Main Drainage scheme is a US$239M project that involves constructing some 48km of sewers of up to 2.82m diameter for Limerick City Council. The construction stage comprised 19 [...]

Today's tunnel fire suppression systems generally have three main objectives: to provide protection and safety for users; to support rescue personnel; and to protect the tunnel structure. Whatever system is [...]

Tunnels pose particular challenges in the design of fire safety measures, for which numerical models have an increasing role to play. Stewart Miles, senior consultant for FRS, the Fire Division [...]

On 21 October 2004, an audience of BTS members and guests heard a presentation on the construction of the Uetliberg Tunnel, part of Zurich's west bypass. The speaker was Stefan [...]

In order to gain consent to tunnel under London's railways and provide safety assurances to the surface railway authorities, CTRL's C250 team developed a comprehensive automatic monitoring system, which allowed [...]

The US$7.3bn Terminal 5 (T5) scheme at London Heathrow Airport, in the UK, is among the largest infrastructure projects currently being undertaken in Europe. The site of the new terminal [...]

Tunneling on the CSO control tunnel project in Providence by Shank/Balfour Beatty for the Narragansett Bay Commission is underway. The TBM components were lowered into the 290ft (88m) deep access-working [...]

The 16.9km long Gotthard Road Tunnel in Switzerland, is the key element of one of the most important road connections through the Alps. The single-bore tunnel with bi-directional traffic on [...]

Every time a tunnel at shallow depth has to be built in the presence of ground water, the problem of dewatering needs to be addressed. A typical solution is to [...]

The US$530M Cross City Tunnel is one of the most complex and challenging infrastructure projects undertaken in Sydney; Australia, with underground railway lines, building basements and services to be negotiated. [...]

The longest road tunnel in the world, the 24.5km Laerdal tunnel in Norway, provided unique design developments for ventilation and driver safety. Tunnelling under high rock stresses offered significant challenges [...]

El Azhar road tunnel Cairo's new frontier: the 2.4km long, twin bore El Azhar road tunnel was designed and built in just 40 months to Europe's highest fire-safety standard. The [...]

Christoph Mueller describes how it is possible to improve the performance and quality of tunnelling operations through standardised data exchange TUNNELLING projects are characterised by a sequence of single operations. [...]

The second tunnel contract awarded recently by SDCWA is the 1.12 mile long Olivenhain-Lake Hodges connection. In April 2005 a $34.5 million design-build contract was awarded to Kiewit Pacific. Two [...]

Construction of NEIS is progressing on schedule despite several major obstacles overcome by the Traylor Bros-led JV. As of late August, 85% of the tunnel was excavated with two Reaches [...]

By mid-April 2004, excavation of the 16,194ft (3 mile) long 20ft diameter CS0 rock tunnel for the was complete--two-and-a-half months earlier than scheduled. Finishing works had staged and were progressing [...]

Two slurry TBMs--believed to be the first ever used in the USA--have set off on their respective drives through the soft saturated deposits of the Willamette River in Portland, Oregon. [...]

LOCATED on the shores of Lake Erie and only a few miles from the wonder that is Niagara Falls, New York's city of Buffalo, seemed an ideal place to hold [...]

NEW ZEALAND'S MERIDIAN Energy has been granted water-only consents for its proposed hydro generation tunnel concept on the north bank of the Waitaki river, subject to certain conditions. The company's [...]

Plans for yet another British tunnelling project has been dealt what some fear is a mortal blow, with the UK government's announcement late last year that it would not provide [...]

In India on the 2050MW Parbati Hydroelectric Project (Stage II), 18 months after its launch, the refurbished Jarva TBM may have finally put its troubles behind it having been plagued [...]

On 19 October, the Eagle's Nest tunnel, part of the Route 8 (formerly Route 9) road scheme broke through in Hong Kong (T&TI June 2004, p6). A tunnel breakthrough ceremony [...]

Welcome to your new look Tunnels & Tunnelling International! After some nine years of the same design we've decided to completely re-vamp the lay out of the magazine and in [...]

City officials in Brisbane, Australia, have agreed to pay US$4.76M to a joint venture between Japan's Obayashi and Eroc to settle construction claims on a 4.5km long, 2.4m diameter sewerage [...]

[ILLUSTRATION OMITTED] CAPTION: On 21 March, Constructota Norberto Odebrecht began a 9km long TBM drive for the headrace tunnel on the USS302M San Francisco Hydro Electric Project, in Ecuador (T&TI, [...]

In early December last year, after 22 months of study, a 1.8km long tunnel was announced as the preferred option to replace the Alaskan Way Viaduct in Seattle. The twin [...]

In Washington DC, the underground pedestrian tunnel connecting the main terminal with concourse B at Dulles Airport opened at the end of 2004. The 12.2m wide tunnel was designed by [...]

On 8 November, the 23km long headrace tunnel for the US$750M Tala hydropower project in Bhutan was completed after delays of more than seven months to the schedule following adverse [...]

Brisbane City Council has confirmed that a detailed feasibility study, including an environmental impact statement, will be completed this year into the planned US$837M, 4.7km North-South bypass tunnel. The project [...]

Twin 250m long tunnels are being proposed by Transit NZ as part of a US$198M extension to the Northern Motorway extension between Orewa and Puhoi near Auckland, New Zealand The [...]

[ILLUSTRATION OMITTED] Caption: The Morgan/Vinci JV celebrates the breakthrough of the first of the 1.6km long, 5.7m diameter HexEx twin-tube tunnels at Heathrew's T5 project, bored by a 6.1m diameter [...]

Three bids were received in early August for the 7.6km deep TBM-driven water tunnels in Vancouver. Lowest at $99.65 million is a bid from the Bilfinger+Berger/Frucon JV. Second is Frontier [...]

Following a surge of requests, since it was originally reported on the T&TI web site in early August, interested parties have had two extensions to the availability of prequalification documents [...]

In Los Angeles on 16 July, the Traylor/Shea/Frontier Kemper/Kenny JV broke through on its 3.3km drive on the North East Interceptor Sewer (NEIS) Upper Reach tunnel on schedule. Using a [...]

On 12 May in the Russian city of Novosibirsk, the Lovat TBM pictured above broke throng after 441m of tunneling. The machine had bored the lefthand drive of twin bores [...]

The 6.68m diameter shield to be used on the first drive of the Shiraz metro project in Iran was assembled by the end of May. Manufacturer Wirth won the US$20.3M [...]

Balfour Beatty Rail has won contracts for the trackwork and third rail for the Santiago Metro Line 4, worth US$70M. Line 4 is 24.1km long and the spur Line 4A [...]

Two new Herrenknecht rock TBMs have been ordered by the Obayashi/MassAna Construction JV for the West Area CSO tunnel contract in Atlanta. The new machines will be used to excavate [...]

Downer Engineering has launched a refurbished 6.15m diameter Lovat TBM on the Singapore Cable Tunnel Contract C302. The 2.85km tunnel will run between ventilation shafts situated at West Coast Park [...]

The Boston Central Artery jacked tunnels initiative won its 10th award with the announcement of a '2004 Nova Award' for innovation. The Construction Innovation Forum (CIF) presented the award to [...]

On 5 May, client Brenner Eisenbahn GmbH (BEG) awarded the contract for the construction of the 3.5km Brixlegg tunnel, part of the new Lower Inn Valley railway in Austria. From [...]

An Australian study may have sounded the death knell for plans to build the 11km Thirroul tunnel. The report into upgrades of the rail line between Sydney and Wollongong has, [...]

Spanish construction company NECSO has completed a 7.5km long tunnel, which forms part of the Ralco hydroelectric project, in Chile. The project, with a budget of US$90M, commenced in April [...]

On 27 April, contractors broke through on the top heading of the second 1300m long US$24.2M Nollingerberg tunnel, in southwestern Germany, several months ahead of schedule. Contractor joint venture Ostu [...]

COWI has been awarded two significant prizes in a design competition for the 15.2m diameter Chongming tunnel in China. The 8km long twin bore road tunnel is planned to be [...]

In Switzerland, the VSH-Hagerbach Test Gallery Ltd has started construction of a fire research and training tunnel to allow firefighters to practice for tunnel incidents in a realistic environment, at [...]

An international tender is underway for the Mazar Project, a US$238M hydroelectric scheme with approximately 4km of tunnels in Ecuador. Precontract documents were available until March and the construction contract [...]

A 3km road tunnel could be built on the western side of Lantau Island as part of a 30km link across the Pearl River estuary in southern China that would [...]

On 8 March construction started on the 2.1km Tornskog tunnel to the north of Stockholm, in Sweden, as part of the 16km Norrortsleden road scheme. Client, the Swedish National Road [...]

On 14 March, the 12.9km long Hsuehshan road tunnel blasted through its final 2.8m after an epic 13 year construction period plagued by floods and collapses. The Taiwan Minister of [...]