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The Karahnjukar hydro-power project involves driving some 70km of tunnels as well as dam construction and the building of an underground power plant. The initial tunnel construction using Tamrock rigs is already running well ahead of schedule and the first of the three Robbins TBMs is now on site and being assembled in the harsh winter environment.

The progress and future plans of the 56km Gotthard Alptransit tunnel between Erstfeld and Bodio are reviewed. The Gotthard tunnel is constructed mostly by using tunnel boring machines (TBMs).

The progress about the Lotschberg Alptransit tunnel between Frutigen and Raron in Switzerland is reviewed. The 34.8km Lotschberg tunnel is driven mostly by drill and blast, and also using tunnel boring machines (TBMs) alongside.

The subway tunnel under the Stuttgart airport in Germany was constructed so as to block subsuface water, rather than rerouting the water.

Section 2 includes twin bores for the London and Thames tunnels.

Geoconsult Arup Joint Venture designed an eastern route around Dublin to its port which included a tunnel.

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 [...]

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 [...]

On September 19 this year, during the second construction phase of the Istanbul Metro a tunnel excavation collapsed beneath a two-story boarding-house which also collapsed into the resultant cavity. Five [...]

The 1,200m four-lane twin-tube Girsberg road tunnel on the A7 connection across the Rhine at Konstanz from Switzerland to Germany is a Swiss tunnelling project that has employed several techniques [...]

When a straight tunnel is constructed by pipejacking or microtunnelling, angular deviations between adjacent pipe segments inevitably occur because irregularities in ground conditions and excavation procedures tend to cause the [...]

The harbour at Ramsgate in southeastern Kent provides a busy cross-channel freight ferry service to Ostend. The expected increasing numbers of heavy goods vehicles using the port necessitate improved road [...]

In February 1998 an article in World Tunnelling described in detail the problems encountered on the CSO 1 tunnel in Richmond. Low cover and inaccurate borings led to major problems [...]

The Weser Tunnel will form the principal crossing point for the Weser River as part of the B 437 federal highway. It connects the A 27 federal motorway between Bremen [...]

The A86 Paris outer relief road is now more than 80 percent complete, with the missing links to be provided by two tunnels which will tunnel under the western suburbs. [...]

Germany's largest privately-financed tunnel project is currently under way in the city of Rostock in the north of the country. Warnow Crossing mbh & Co. KG are building the Warnow [...]

With various systems available for replacing or rebuilding existing large-diameter sewer tunnels, the owner of a new tunnel project is confronted with deciding which system is best suited for that [...]

Bages, Spain - Motorway. Award to GPO Ingeniera SA of engineering design contract for C-37 motorway with tunnels from Igualada to Manresa in [...]

South Carolina, US - Stormwater Storage. URS designing $12 million, 1.28km-long x 3m-diameter tunnel with 18 drop shafts in sandy, silty clay underlain by marl as an overflow for existing [...]

Madrid, Spain - Metrosur Comunidad de Madrid reports 20km of EPB tunnels complete, together with seven cut and cover sections and 600,000[m.sup.2] of diaphragm walls in just nine [...]

Solna, Sweden - Cable Duct Restricted invitation to tender, deadline 28th August, 2001, for 2.45km-long x 18[m.sup.2] cable tunnel with 27[m.sup.2] access tunnel for Solna [...]

Antalya, Turkey - Railway Rehabilitation of 260km-long railway will include construction of nine tunnels totalling 9km. Engineering design by OHL, Alsim Alarko and Agrupacion [...]

The first (southern) section of Tehran's new metro Line 1 was opened in August. Line 1 is an 8.5km north-south double track route mostly underground through the centre of the [...]

An outstanding performance marked the completion of Tunnel Ill of the Trasvases Manabi project in Ecuador. An impressive record of 65.86 m/day on average has been established. The breakthrough celebration [...]

The 6 m-diameter hard rock TBM holed through on April 18th, 2001 into an existing 5 m-diameter horseshoe tunnel after mining 4.12 km. The TBM will now be disassembled and [...]

The 3.2 m-diameter Robbins hardrock TBM has holed through on the 3.15 km-long Lower Canyon tunnel of Ute Water Conservancy District's $58-million Plateau Creek Pipeline Replacement project east of Grand [...]

Construction of the 9.6 km-long second tailrace tunnel for the New Zealand Lake Manapouri Power Station was completed on 13th March, 2001 when the 10.05 m-diameter Atlas Copco Robbins TBM [...]

China Harbour Engineering Company Group and Australian company Transfield Pty Ltd have been awarded a HK$380 million contract to construct the Kai Tak Transfer Scheme, part of the West Kowloon [...]

The 250 km-long coastal A20 motorway from the Sicilian capital Palermo to Messina has been under construction from both ends for the last ten years. For most of its length, [...]

At Gamsen, Switzerland a 950 m-long motorway tunnel, including 250 m cut and cover, was awarded to the Wadeg consortium of local contractors. At Marseilles in southern France, a $20 [...]

At Trento, Italy a restricted invitation to tender was published for excavation of a 4.8 m-diameter investigation tunnel in dolomite for the 3.5 km-long Mezzolombardo road tunnel. The contact is [...]

In Hong Kong, China, four options are under consideration for the $2 billion next stage of the Deep Tunnel Sewerage Syatem include a tunnel between North Point and Central which [...]

Outside Bremen, Germany, the north tube of the Weser tunnel got underway on 26th February, 2001 following three months TBM recommissioning. The Herrenknecht machine was officially relaunched by Niedersachsen's tunnel [...]

The rapid pace of political change and prospects for economic progress in Yugoslavia since its return to democracy offer huge opportunities for construction and development in the potable water, wastewater, [...]

Sodra Lanken is part of a new ring road system around the city of Stockholm, Sweden. The ring road will include the existing Essingeleden, and will later on be completed [...]

Egypt's National Authority for Tunnels to invite bids for the construction of a 2.5 km extension to Cairo metro Line 2 from Giza to Moneib. The $85.7 million project is [...]

Singapore's 5.4 km Marina Line with six underground stations from Dhoby Ghaut MRT Station, below Bras Basah Road to Marina Centre, and then below Nicoll Highway to Stadium Boulevard, is [...]

In the United Kingdom, the Channel Tunnel Rail Link, Section 2, prequalifications are underway for contract 105 for Union Railways at St Pancras. Contract 105 is for deck extension of [...]

At Zurich, in Switzerland a second underground station with four tracks is to be built beneath the central railway station, with a 4.8 km-long single-tube tunnel connection to Oerlikon in [...]

Scotland's 147 m-long Roughcastle tunnel, being driven under the main Edinburgh Glasgow railway line and below the historic Antonine Wall, which is the northernmost boundary of the Roman Empire, is [...]