USA

Second Midtown Tunnel in Virginia: All-Concrete Immersed Tube Tunnel

The Second Midtown Tunnel is an immersed tube tunnel, which will link Norfolk and Portsmouth in the US state of Virginia. The road tunnel will consist of eleven segments, cast in the dry dock in Baltimore County and then transported about 320 km south by sea and into the Elizabeth River to be submerged at depths of up to 29 m.

Elizabeth River Tunnels Project

The Midtown Tunnel in the Elizabeth River has already been in operation for more than 50 years. With about one million vehicles per month, the link between Norfolk and Portsmouth is one of the most heavily trafficked roads east of the...

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Issue 2014-08 Sweden

Marieholm Tunnel – Immersed Tunnel in Gothenburg

The Marieholm Tunnel in Gothenburg is a road tunnel with three lanes per direction and an evacuation tunnel. It is devised for more than 100 years service life and is to be built as an immersed tunnel...

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Issue 2012-05 Sweden

Stockholm’s Söderstrom Tunnel broken through

The Citybanan is a 6 km long, twin-track S-Bahn tunnel (over 500 trains/day) in the middle of Stockholm and provides the link between Tomteboda on the northern limits of the city with the suburb of...

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Issue 2015-06 Bangladesh

Road Tunnel under the Karnaphuli River expected to boost the economy of Chittagong

At the end of June the Road Transport and Bridges Ministry of Bangladesh signed a 705 million US dollar deal with China Communication Construction Company Ltd (CCCCL) to build a 3.5 km long two lane...

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Issue 2010-03 Austria

Breakthrough at Pfänder Tunnel

A second bore for the 6.6 km long Pfänder Tunnel was driven with a tunnelling machine (S-494, Herrenknecht AG) with 11.85 m cutterhead diameter. The support was provided with 25 cm thick and 2 m...

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Issue 2019-06 Germany | Deutschland

Stuttgart 21: First Tube of the Untertürkheim Tunnel Broken Through

The Deutsche Bahn has reached another important milestone on the Stuttgart 21 project: in the middle of November 2019, after about two years of excavating the Untertürkheim Tunnel, the first of two...

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