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Author(s):	Schneider, Alex; Tanner, Simon
Title:
Abstract:	The Visp bypass is an important link on the Swiss national road A9 from Lausanne to Brig-Glis in the Canton of Valais, which is being improved to provide continuous dual carriageway. About 7 km of the alignment of this 8.8 km long section of the A9 will run through tunnels, with the core structures being the 4.2 km Eyholz Tunnel and the 3.2 km Visp Tunnel. Altogether five underground junction structures have to be constructed for the Visp bypass, of which three will be newly excavated and two are enlargements of the existing Vispertal Tunnel. The following report only deals with the Eyholz Tunnel, which has already been largely excavated. Construction of the main contract of the Visp Tunnel is planned to start in 2012. Die Umfahrung Visp stellt ein wichtiges Teilstück der zukünftig von Lausanne bis Brig-Glis durchgehenden richtungsgetrennten Nationalstraße A9 im Kanton Wallis dar. Die Linienführung des rund 8,8 km langen Teilstücks der A9 verläuft zu rund 7 km in Tunnelbauwerken. Kernstücke sind der 4,2 km lange Tunnel Eyholz und der 3,2 km lange Tunnel Visp. Insgesamt sind für die Umfahrung Visp fünf unterirdische Verzweigungsbauwerke zu erstellen, von denen drei komplett neu auszubrechen sind und zwei aus einer Ausweitung des bestehenden Vispertaltunnels hervorgehen. Die nachfolgenden Erläuterungen beschränken sich auf den Tunnel Eyholz, der bereits zu einem großen Teil ausgebrochen ist. Der Baubeginn des Hauptloses des Tunnels Visp ist für 2012 geplant.
Source:	Geomechanics and Tunnelling 5 (2012), No. 2
Page/s:	120-134
Language of Publication:	English/German

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