On April 18, ÖBB in Innsbruck will start work on the 112-year-old viaduct of the Karwendelbahn. 16 of the 35 arches will be renewed using prefabricated construction. The Karwendelbahn will be closed from July 15th to August 22nd due to the work.
During the construction of the Karwendelbahn in 1910, a viaduct consisting of 35 arches was built in the Wilten district of Innsbruck. According to the ÖBB, 16 of these arches are at the end of their service life despite several costly renovations, the arches & therefore need to be renewed.
According to ÖBB, the rest of the viaduct is in good condition, which meets all safety aspects. Therefore, no measures are required there in the next twelve years for the time being.
Structural panel is manufactured as a finished part
The preparatory work will start on April 18th, the main work will follow immediately afterwards. Eight arched supporting structures are being constructed on falsework at the side of the existing supporting structure. The load-bearing panel is manufactured as a prefabricated part on an area of around 180 m².
Gravel bed is raised
As Christian Wieser, Regional Manager ÖBB-Infrastructure, informs, the new supporting structure will be demolished during the closure of the Karwendel route and the new supporting structure will be pushed in as a whole with hydraulic presses. The route will then be restored. The work is scheduled to be completed by the end of August.
Since the entire building is a listed building, the vaults have to be restored afterwards. These will be lowered by 20 centimeters and the ballast bed, which is currently twelve centimeters high, will be raised in this area in order to restore the original level. This should significantly increase the service life of the bridge seal.
ÖBB invite you to an information afternoon on April 26th
The Karwendelbahn line will be closed from July 15th to August 22nd due to the work. The ÖBB draws attention to the fact that during this period some work is also carried out at night. There is also increased noise and dust pollution due to the demolition work. The ÖBB seeks understanding from the residents for the necessary construction work and invites them to an information afternoon directly on site on Tuesday, April 26, from 4 p.m.