Switzerland

Handeck-Gerstenegg
Exploratory Tunnel

Currently the Handeck-Gerstenegg exploratory tunnel is under construction to secure access in winter to the Grimsel 1 and 2 power plants as well as to open up  further “KWO plus” projects for the Oberhasli AG (KWG) at Innertkirchen, one of Switzerland’s leading hydro power companies. The bore, which can be negotiated by lorry, is 3,400 m long, 4.50 m wide and 5.40 m high with a 12 % gradient. The new portal at Handegg is located 1,300 m ASL before running along the western flank of the Aaretal valley. The access heading and the new portal at Gerstenegg (1,700 m ASL) are linked with the access...

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Issue 08/2010

Access Adit I for Kraftwerke Linth-Limmern

Lot A1 is a component of the Linthal 2015 project for Kraftwerke Linth-Limmern AG (KLL), which will include comprehensive expansion of KLL‘s facilities. An additional balancing reservoir is to be...

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Issue 01/2019

Boßler Tunnel: Influence of Rock Mechanics on the Tunneling Concept – Tendering and Execution

1 Introduction In the following, the importance of careful rock mechanical investigations for the excavation concept of a tunnel will be shown using the example of the Boßler Tunnel. On the basis of...

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Issue 05/2013 Switzerland

Roveredo Bypass: Tunnel Breakthrough

A 2-lane bi-directional tunnel is being built for the Roveredo Bypass – with shoulders at both sides and 2 lay-bys. It has up to 3,000 m overburden and runs north with 0.8 % gradient lying in an arc...

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Issue 02/2021 Switzerland | Schweiz

2nd Gotthard Tube: Access Shaft Contract Awarded

In mid-March 2021, the Swiss Federal Roads Office (FEDRO) has awarded the 86.6 million Swiss francs (78.5 million euros) contract to build a 4 km access shaft for the second Gotthard tube (Lot 243)...

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Issue 03/2020 Switzerland

Water Ingress in the Lötschberg Base Tunnel

The east tunnel of the Swiss Lötschberg base tunnel has already had to be closed three times this year due to water and mud ingress: In February, March and most recently at the end of April 2020. The...

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