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The improvement of the S16 four-lane expressway between Landeck and Bludenz in Austria's Tyrol was started back in 1971, with the construction of the Arlberg road tunnel as its key [...]

The crossing of Boston's Fort Point Channel is a microcosm of all the technological challenges facing the biggest highway project in U.S. history. IT WAS DESTINED TO BE a driver's [...]

Techniques used in the design and construction of the 24.5 kilometer Laerdal Tunnel, Norway, are discussed. The tunnel will be the longest in the world.

In June, 1994 WT reported on the Hitra Strait Crossing, a 5.65 km-long subsea three-lane road tunnel between the Norwegian mainland west of Trondheim and the offshore island of Hitra. [...]

Most civil engineering tunnels and those constructed as capital works in mining are provided with some form of lining system. The purpose of the lining is not only to provide [...]

Work on the 12.9 km long Pinglin highway tunnel in Taiwan started in late 1991. Since then, less than 5 km or 12% of the twin tube tunnel with its [...]

Almost everything about the Eastern Distributor highway tunnel through central Sydney is remarkable. Its size, its shape, its interior configuration, and its lining and support are all aspects which set [...]

The design of portals is becoming a complex part of modern tunnel planning. The limited space available at the portals in urban areas has always challenged designers to produce a [...]

Byline: BY JAKE HALPERN THE NAZI UNDERGROUND Is treasure buried beneath the mountains of Poland? Lower Silesia, in southwestern Poland, is a land of treasure hunters. Until the end of [...]

IN NEVADA'S COMSTOCK LODE, ADOLPH SUTRO WANTED TO BUILD A MULTIPURPOSE, 4-MILE-LONG TUNNEL THAT WOULD BE USED FOR DRAINING WATER, VENTILATING THE MINES AND TRANSPORTING ORE. THE SO-CALLED BANK RING […]

The town of Falmouth is to be found in the extreme southwest of England on the south coast of Cornwall. As part of an ongoing programme of coastal water improvements [...]

Traffic congestion and urban transportation problems can be reduced via metroroutes which are underground tunnels that can accomodate a maximum of six lanes of traffic. The idea was conceived by two French engineers and may be implemented in Paris and other French cities. Construction costs for these metroroutes are a lot less expensive than those for conventional roads and can cost even less if such routes are utilized solely by light vehicles.

The Kaponig tunnel near Spittal in Austria is just one of dozens of major tunnelling projects in a programme to upgrade rail transit services across the country. The 5.06 km [...]

The Inanda-Wiggins Aqueduct is located in the province of KwaZulu Natal, near the city of Durban and consists of a series of tunnels and pipelines. The aqueduct will convey raw [...]

A redesign of Boston's Central Artery/Tunnel project saved $300 million in construction costs. In addition to the savings, the $14-million redesign will temporarily provide a place to cast immersed tunnel tubes and serve as jacking pits. Conceived by Maguire/Harris, the redesign improves the efficiency of the alignments. Jacking of two vehicle tunnels and a ramp tunnel also provide substantial savings in excavation costs.

Records are made to be broken, and the latest to fall occurred on February 27th, 1996 when the record for TBMs in the 13-16 ft (4-5 m) class established by [...]

Unless prevented or controlled, ingress of water into road and rail tunnels will be detrimental to furnishings and the efficient utilisation and safety of the completed works. The effects will [...]

St. Louis derives its prosperity from its strategic location at the confluence of two of America's most important rivers, the Missouri and the Mississippi. An availability of cheap land for [...]

A new precast tunnel near Chicago promises to keep the U.S. at the forefront of a field where researchers work with matter that makes cement particles look like boulders and [...]

Ground movement induced by excavation has been one of the most critical concerns for the JLE project team. The Line, running as it does beneath some of the oldest, historically [...]

Two of the new stations on the JLE are complex underground mined stations in London Clay at London Bridge and Waterloo. Three are combined open-cut boxes with mined enlargements of [...]

Durability and a long, low-maintenance service life was the starting point for the design of the permanent single shell precast concrete and spheroidal graphite iron (SGI) segmental lining systems to [...]

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 [...]

Eleven tunnelling machines of five different manufacturers have excavated the 22.2 km of 11.1 km of nominal 4.4 m i.d. twin tube running tunnels which link the eight new underground [...]

The island of Jersey is just a few kilometres off the French coast. English is most commonly spoken although there is a Jersey French language, sterling is the currency and [...]

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 [...]

The Muni Metro Turnback (MMT) Project is a US$202 million extension of the San Francisco Muni Metro subway under Market Street. The MMT facility includes a 256 m (840 ft) [...]

Niagara tunnel project, Canada Scheduled for completion next year, Ontario Power Generation's Niagara tunnel project includes the construction of a 10.2km long, 12.7m internal diameter tunnel and associated facilities which [...]

The effects of high concentrations of motor traffic on people and the environment are becoming increasingly serious - traffic noise, dust and exhaust fumes are unhealthy and unwelcome. This is [...]

While fitting me out with a hard hat and earplugs, safety engineer Peter Reynolds held up a steel-cased cigarette lighter and waved it in my face. 'See this, Jimmy? Even [...]

Pipejacking is a fast expanding sector in the tunnelling industry but it is not a new concept. In the 1890s cast-iron pipes were jacked under railroad tracks in the U.S. [...]

Some of the most ambitious urban tunnelling ever attempted is currently underway in Portugal to extend the Lisbon Metro. Caverns of up to 360 [m.supp.2] are to be excavated to [...]

Building tunnels to survive contained nuclear explosions is the challenge faced by tunnelling engineers at the Nevada Nuclear Test Site about 65 miles north west of Las Vegas in the [...]

The first segmental bolted linings for a tunnel were installed in the Tower Subway under the River Thames which was opened in 1869, some 75 years after tubbings were first [...]

Consideration of risk has always been an integral part of the role of the engineer. This is particularly true for the tunneller. Not only is it impossible to predict the [...]

The Dallas Area Rapid Transit (DART) was established in 1983 by a majority vote in Dallas County, including 14 cities. The reason for creating DART was to take over, maintain [...]

A vital rail link between Italy and the north European countries passes through Bern in Switzerland and shares common track with internal Swiss east-west traffic to Olten, diverging at Zollikofen [...]

The $6.4 billion Central Artery/Third Harbor Tunnel project is the largest of its kind in US history. Engineers who created the tunnel commented on the structure's questionable design features. Project officials were aware of problems in the tunnel including the possibility of ship collisions.

The City of Rochester, New York was established in 1811 and historical records indicate that sewer construction in the city dates back to at least 1836. From that time until [...]