New road and bridge design, Mayrhofen in Tyrol

Penkenbahn cable car in Mayrhofen

Employees from BERNARD Ingenieure on the Ahorn Bridge

The Zillertalbahn is a narrow-gauge railway line with a track gauge of 760 mm, running along the Ziller Valley from Jenbach to Mayrhofen. In 2010, BERNARD prepared a feasibility study to extend the Zillertal railway line by 1,300 m. The study was based on a connection of the Zillertalbahn to the two cable car routes “Penkenbahn“ and “Ahornbahn”.

The construction of the new Penkenbahn required a new traffic concept and BERNARD was closely involved in its implementation. On behalf of Mayrhofner Bergbahnen, experts from BERNARD assessed the feasibility of the Penkenbahn Wendebrücke, a new bridge across the Ziller River where trains can reverse direction. Subsequently, they were also assigned to prepare permit application design, tender design and execution design of this bridge. In the course of the bridge construction, a relocation of the Ziller River as a result of the extension of the Zillertalbahn was taken into account.

The bridge with a span of 43 m is part of the future Zillertalbahn railway stop and was built as integral bridge with a prestressed concrete slab structure. The structure was founded on large, 12 m long bore piles. Construction logistics required that the two structures across the Ziller River had to be built before starting the construction of the cable car routes.

Already during the design stage of the Ahorn Bridge, BERNARD was asked to carry out the design and site supervision of another bridge across the Ziller River near the Ahornbahn cable car route.

The construction of the Strasserfeldstraße, a connection road between two local centers, is also part of the Mayrhofen traffic concept. In addition, experts from BERNARD carried out the design of ripraps und retaining walls, as well as local site supervision.

All structures were designed within only one and a half years and successfully commissioned on schedule in December 2015, right at the opening of the tourist season.