Clasaurertobelviadukt - Integrale Instandsetzung eines Mauerwerksviadukts

Clasaurer Valley Bridge - Integral Structural Repair of a Masonry Bridge

The Clasauerer Valley Bridge of the Rhaetian Railway is located on the track Coire - Arosa. It was built as a masonry arch bridge with six openings in 1914. Due to significant ground movements, the structure suffered heavy damage. To ensure the operating safety an extensive overhaul was necessary.
An extensive modification of the structure was executed, resulting in a significant change of the flow of forces. This paper presents the problems and treats conceptual considerations as well as the development of the structural model including a discussion of selected results, respectively. Furthermore, the complex boundary conditions required a detailed planning of the construction work.