Switzerland

Redeveloping the Simplon Tunnel

The 19.80 km long Simplon Tunnel between Brig/CH and Iselle/I possesses 2 single-track bores, which are connected by 46 cross-passages set roughly 500 m apart and 2 sets of points in the middle of the tunnel, which enable changeovers to be made from the one bore to the other. Roughly one half of the tunnel is located in Italy, the other in Switzerland and it is used by both goods and passenger trains. The tunnel was built between 1906 and 1922. It was at one time the world’s longest tunnel and technically up-to-date. Now it no longer complies with current safety and technical standards. As a...

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Issue 2014-06 Switzerland

Self-Rescue in the Simplon Tunnel

The 19.8 km long Simplon Tunnel (completed in 1922) between Bries (Switzerland) and Iselle (Italy) possesses two single-track bores with two sets of points at the centre of the tunnel and...

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Issue 2011-07 Germany

Redeveloping the Schlüchtern Tunnel

The New Schlüchtern Tunnel is nearly 4 k m long and possesses 9 m internal diameter. It was driven using a tunnel boring machine (TBM) at a distance of 50 to 90 m from the existing tunnel [1-4]. As...

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Issue 2013-03 Austria

Redeveloping the Pfänder Tunnel

After commissioning the 2nd bore in mid-2012, the original 6,585 m long, twin-track bore of the Pfänder Tunnel was closed to traffic to be redeveloped. In late 2012, most of the construction jobs in...

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Issue 2012-02 Fire in the Simplon Tunnel

Novel Redevelopment and Investigation of Causes

The almost 20 km long Simplon Tunnel between Switzerland and Italy was at the time the world’s longest rail tunnel when it was opened with 2 tracks in 1922 and complied with the latest standards (2...

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Issue 2011-04 Austria

Roppen Tunnel fully commissioned

A second tube was produced largely by mining means together with cross-passages to the existing bore for the more than 5 km long, single-tube Roppen Tunnel near Imst for the Inntal motorway (A12)....

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