Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg
Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg Arlberg Mountain Pass - road connection Rauz-Stuben 2015 - Geobrugg

Arlberg Mountain Pass - road connection Rauz-Stuben

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Street
L 197 Arlbergpassstrasse oberhalb von Stuben am Arlberg
ZIP code
6762
Place
Stuben am Arlberg
Country/Region
Austria
Year of installation
2015
Customer
Amt der Vorarlberger Landesregierung
Engineering
GEOGNOS Bertle Technische Geologie Ziviltechniker GmbH
Contractor
HTB Baugesellschaft mbH
Protected object
Road
Systems
TECCO® G65/3, TECMAT®
Corrosion protection
GEOBRUGG SUPERCOATING®
Stabilized area
11445 m²
Maximum slope height
25 m
Slope inclination
40 ° - 80 °
Protection measure
Active slope stabilization
Greening
Yes
Erosion control mat
Yes
Exposition
South-West
Other installed applications
Rockfall Protection
Geology

Shell limestone and Arlberg formation.

Situation

The Arlbergpassstrasse L197 road connects regions of Tirol and Vorarlberg. At the Rauz junction, the road becomes Lechtalstrasse L198. In winter it provides the only safe connection to the popular winter sports destinations of Lech and Zürs. The management of the Arlbergsstrasse, geographically situated in the right hillside of the Rauzbach river, had until now been subject to constant, extreme rockfalls, rockslides, and slope instabilities.

Description

In 2011, a feasibility study was conducted into rerouting the road. In 2014, the Austrian state of Voralberg began the construction of five hairpin bends with a length of 1.3 km and at a cost of around 9 000 000 EUR. The new route loosely follows a rough historic path.

Due to the high slope gradient, the serpentine roadways can only be guided with the appropriate support structures and by following gaps in the terrain. The removal of rocks from around 65 000 m³ of the alpine Muschelkalk (shell limestone) and Arlberg rock formations was mainly carried out using explosives.

The Nüziders subsidiary of civil engineering company HTB installed around 140 m of temporary GBE-500 rockfall protection barriers with an overall height of 3.5 m to enable safe construction and traffic flow. The permanent, active securing, of the newly formed tracks through the terrain using 11 445 m² of TECCO® SYSTEM³ as well as measures to protect against erosion and snow slides using around 1680 m² of TECMAT® were also taken care of by HTB.

In October 2015, the new 1.3 km route was approved – on schedule and in accordance with the latest road safety regulations.

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