Preview

Author(s):	Perner, Reinhard; Schorn, Roland; Atzl, Georg
Title:	New construction of Albula Tunnel II - Experience with steel fibre shotcrete / Neubau Albulatunnel II - Erfahrungen mit Stahlfaserspritzbeton
Abstract:	The new construction of the 5860 m long Albula Tunnel was mainly carried out by blasting from the Preda and Spinas portals. Due to the exposed location in the high mountains, mixing plants were installed on both portal sides for the concrete supply; the concrete aggregate was largely produced from the excavated material, with a gravel plant being built in Preda for this purpose. The planned tunnel lining provides for a single-shell shotcrete construction for the most part. In the course of the excavation work, the excavation support was optimised so that the reinforcement mesh in the main support class in the single-shell area were replaced by steel fibre shotcrete. Der Neubau des 5860 m langen Albulatunnels II erfolgte vorwiegend im Sprengvortrieb von den Portalen Preda und Spinas aus. Aufgrund der exponierten Lage im Hochgebirge wurden für die Betonversorgung auf beiden Portalseiten Mischanlagen errichtet, der Betonzuschlag wurde zum großen Teil aus dem Ausbruchmaterial hergestellt, wozu ein Kieswerk in Preda errichtet wurde. Der projektierte Tunnelausbau sieht größtenteils eine einschalige Spritzbetonbauweise vor. Im Zuge der Vortriebsarbeiten wurde die Ausbruchsicherung dahingehend optimiert, dass bei der Hauptsicherungsklasse im einschaligen Bereich die Bewehrungsmatten durch Stahlfaserspritzbeton ersetzt wurden.
Source:	Geomechanics and Tunnelling 14 (2021), No. 4
Page/s:	377-389
Language of Publication:	English/German

I would like to buy the article

You can download this article for 25 € as a PDF file (1.79 MB).
The PDF file can be read, printed and saved.
Duplication and forwarding to third parties is not allowed.

Please enter your email address now to start the order process.
The link for the download will be sent to the email address stated after the
order process has been completed.

Your email address

I am an online subscriber

As an online subscriber of the journal "Geomechanics and Tunnelling" you can access this article via Wiley Online Library.

I would like to order "Geomechanics and Tunnelling"

This article has been published in the journal "Geomechanics and Tunnelling". If you would like to learn more about the journal, you can order a free sample copy or find out more information on our website.

Prices include VAT and postage. Prices for 2017/2018.
€ Prices apply to Germany only. Subject to alterations, errors excepted.