Switzerland

Silvaplana Tunnel – High Demands on Safety

For generations Silvaplana has represented an important traffic hub between North Bünden and the Engadin. Transit traffic is increasingly being seen as a burden. At the end of 2007 an outline project was approved (1,470 m bypass with tunnel; 70 mill. CHF /50 mill. euros) but its execution was delayed until requirements on tunnel safety were clarified. Thanks to prefinancing by the municipality it was possible to begin construction two years earlier than initially planned in other words in mid-2010.

The two-lane tunnel is provided with 1.50 wide pathways at both sides, possesses a 7.50 x 4.50 m...

Related articles:

Issue 2013-06 Austria

Bosruck Tunnel: Redeveloping the existing Bore

A second bore was produced by drill+blast using the New Austrian Tunnelling Method (NATM) for the 5.5 km long, 2-lane Bosruck Tunnel on the A?9 motorway. It possesses 2 lanes. After being broken...

more
Issue 2014-04 Belgium

Kennedy Rail Tunnel – new Fire Protection Measures

The Kennedy rail tunnel running beneath the Schelde to the south of Antwerp was built in 1969 for the Antwerp-Gent link. Owing to enhanced safety measures, which have since been introduced, the tunnel...

more
Issue 2010-03 Switzerland

Gotthard Road Tunnel to be redeveloped

The 17 km long Gotthard Road Tunnel possesses a 2-lane bore operating bidirectionally with a parallel negotiable evacuation tunnel. It was opened in 1980. During the next few years the surfacing and...

more
Issue 2013-06 Austria

Arlberg Tunnel: 37 new Escapeways

At the end of 2010 the ÖBB recommissioned the 10 km long rail tunnel with 2 tracks after completing 8 evacuation and rescue ways leading to the parallel running Arlberg road tunnel The costs involved...

more
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...

more