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THE WANETA Expansion Project (WAX) is located near the existing Waneta Dam site at the confluence of the Pend d'Oreille and Columbia Rivers approximately 10km south of Trail, British Columbia. [...]

After six months of tunnelling standstill, construction is starting on an access shaft to repair the TBM mining the SR 99 bore in Seattle, the largest diameter machine in the [...]

A new cable tunnel has gone seemingly without a hitch in the Willesden/Harlesden neighbourhoods of north London. Alex Conacher tours the site with Murphy's tunnelling project manager Keith Pollard IT'S [...]

The Land Transport Authority (LTA) of Singapore has been procuring the expansion of their underground rail network at a prodigious rate over the last twenty years. EPBM tunnelling has been [...]

Since commissioning in March 1967 the La Fontaine highway tunnel that links Montreal Island with the South Shore of the St Lawrence River in Montreal, Canada, has had to accommodate [...]

This paper reviews leading existing methods of TBM performance and advance rate prediction, taking all applicable factors into consideration, and their suitability for the conditions of the Karaj-Tehran water supply [...]

[ILLUSTRATION OMITTED] When one of its two double shields driving the headrace for the Gilgel Gibe II hydropower scheme, in Ethiopia, met a fault with mud at up to 40 [...]

Burying the power lines that currently overshadow the future site of the 2012 Olympic Village, in East London, has entailed the construction of 10 large diameter shafts and more than [...]

The Mersey Queensway Tunnel is a four-lane bi-directional, 13.4m i.d. road tunnel that connects Liverpool and Birkenhead. Opened to traffic in 1934, the tunnel and associated structures (such as the [...]

The US$302m San Francisco Hydroelectric Project is currently being constructed by Odebrecht in order to relieve Ecuador's present power deficit. The 230MW project is located entirely underground and includes the [...]

Although ideas for the construction of a north-south trans-alpine railway through Switzerland had been mooted as early as 1838 a further fifteen years elapsed before eight of the Swiss cantons [...]

Despite the recent fatal collapse of an open cut tunnel excavation, Singapore remains committed to placing the entire 33km long Circle Line of its MRT (Mass Rapid Transit) system underground. [...]

The Drainage Services Department (DSD) of the Hong Kong SAR Government commissioned the design and construction of the Kai Tak Transfer Scheme (KTTS) in the year 2000. The purpose of [...]

At 48km long the Phase 1 network of the Deep Tunnel Sewerage System (DTSS) in Singapore passes through much of the island's highly' variable geology: Conditions vary from soft compressible [...]

The city of Atlanta, DeKalb County and Fulton County have agreed to work together to construct the Nancy creek tunnel to help an area that experiences recurring problems with sewage overflows. The tunnel option was found to be the most environmentally sound and least disruptive solution to the problem being faced by the existing sewer system.

Challenges in transport policies and infrastructure issues in Germany are naturally linked to the country's central position within the heart of Europe. The current extensions to Europe's north-south and east-west [...]

Boring the 1.6km long twin-tube Weser Tunnel in northern Germany proved an exacting task for the construction team. The alignment's geology and hydrogeology pushed Mixshield TBM technology to, and beyond, [...]

In 1958 and 1963, the UK introduced new codes of practice and decompression schedules, which radically changed the approach to compressed air tunnelling. At the time this represented a major [...]

TUNNELLING CONSULTANTS Company (a) Turnover Areas of expertise Information (b) Turnover in tunnelling A Alpine a) US$4.4M Preliminary and final Via Ripamonti 2 b) US$1.2M design, hydro electric I-20136 Milan [...]

The geological conditions, in addition to construction and technical modifications, represented significant challenges for the project engineers. Ekkehart Neumuller of Strabag, Gerald Pischinger of 3G--Gruppe Geotechnik Graz ZT GmbH, and [...]

In late 1998 the Porto Municipality undertook a commitment to upgrade its existing railway network to a fully functional, integrated metropolitan transport system. As a result, a 70km, 66 station, [...]

To ease the traffic congestion in the Swiss ski resort of Flims, a bypass tunnel proposed years ago now has been designed with environmental, dewatering and non-interference with hydraulic patterns of the area, concerns in mind. Construction will by Arbeitsgemenschaft Umfahrung Flims.

In June 2012, the Ireland based Ward & Burke Company, working from its branch office in Canada, commenced tunnelling operations as part of the Laurel Uptown Trunk Sanitary Sewer project [...]

As part of an on-going programme to improve national and international railway links for the year 2000 and beyond, Austria has embarked on excavation of a 9.8 km-long pilot tunnel [...]

The world's largest EPB tunnelling machine, the 11 m diameter TBM for the Lyon bypass, is now roughly a third of the way on its first drive. Operating in very [...]

How to make an EPB TBM work well in loose running material beneath a high ground water table? The answer is associated increasingly with the skilled application of modern conditioning [...]

The Lower Engadin has always been a I rather remote region of the south east of Switzerland. During winters with strong snowfall access by road is difficult and costly to [...]

Shanxi Province of the People's Republic of China (PRC) lies in the north-east of the country, close to the Inner Mongolia border and some 400 km from the capital city [...]

Welcome to boom town. Istanbul's economy expanded by 5.5 per cent on a per capita basis, and employment rose an astonishing 7.3 per cent between 2009 and 2010. The Washington-based [...]

One of the major developments of recent years has been the development of sprayed linings, especially to control potential water make in an operational tunnel and to protect equipment and [...]

Taking forward its expansive, long-term transport plans, Denmark has a fresh surge of tunnelling-related activity underway with more metro to be built in the capital and a possible undersea road [...]

In March 2004, Obayashi Corporation (the North American division of the Japanese parent construction company) submitted the lowest of five bids for the West Area CSO tunnel project in Atlanta [...]

Difficult geology and high volume of groundwater inflow led tunnelers in California to work again on the Arrowhead tunnels which is a part of the $1.2 billion Inland Feeder project to supply water for towns east of Los Angeles. The tunnels mark the beginning of the Inland Feeder project, a 44-mile conveyance system that would deliver up to 646 million gallons per day of water from the State Water Project when supplies in northern California are plentiful.

During excavation of the Soumagne high-speed rail tunnel, in Belgium, crews encountered unexpected sandstone benches, which seriously impaired the performance of the roadheaders selected. Iwan Couchard, former director of studies [...]

The second attempt to complete the Arrowhead Tunnels of the Inland Feeder Project in Southern California is proving to be more a grouting operation with some tunneling. Pre-excavation grouting to [...]

Although a small project, the Moorcroft Quarry Tunnel, in the UK, had a number of issues that made it technically difficult--highly variable ground, low cover and highway and gas main [...]

The disposal of sewage water Brussels North project for the city of Brussels involves construction of a 7 km long drainage system between the cityEs downtown area waste water system and the new sewage treatment plant. Denys n.v of Wondelgem, Belgium was awarded the complete pipe-jacketing project, which presents an exceptional challenge due to the paucity of precise and reliable data.

It's a 'relationship contract' rather than an 'alliance', straight lump-sum design-build, or 'partnering' that has been adopted in Perth, Western Australia, to encourage cooperation between those charged with successful construction [...]

The Steg-Raron contract forms the southern section of the 35km Lotschberg tunnel, part of the AlpTransit project, in Switzerland. In total the Lotschberg project consists of 81.5km of tunnels, to [...]

At the joint British Tunnelling Society/MINSOUTH meeting on the 19 February Colin Cook of Butterley Mining Ltd, Dr Rob Farnfield of Exchem Explosives Ltd and Dr Lewis Meyer from Hock [...]

The A86 West forms the final link of the A86 outer ring road around Greater Paris, most of which was constructed in the 1990s. It passes through an environ mentally [...]

The brief for refitting the old runnel infrastructure as an integral part of the northern section of New Jersey Transit's (NJTransit) Hudson-Bergen LRT is straightforward. Take the old 4, 100ft [...]

The Stratford Box, being constructed under Contract 230 (C230), and the old railway lands in which it is situated, play a crucial role in the completion of the entire CTRL [...]

Selecting a contract type that provides suitable risk allocation may be crucial for the success of any subsurface project. What a suitable risk allocation is depends on many factors i.e. [...]

In 1998, AEM, the Municipality of Milan's Energy Company, planned the enlargement of its Premadio hydroelectric power plant to improve it's production capacity from 580MW to 800MW. The total contract [...]