Renovating the Hochmais and Frauenegg anchor walls

A number of structural defects were identified in the course of a 2016 structural survey of the 40-year-old walls along the A10 motorway. The Hochmais and Frauenegg anchor walls, located between the Pongau and Hüttau motorway junctions, were no longer in a condition to meet modern technical requirements. In spring 2019, ASFINAG Bau Management GmbH contracted PORR to renovate the old anchor walls. The project involved installing new

grouted anchors in the form of prestressed permanent strand and bar anchors. This meant first building reinforced concrete pilaster strips in the anchor walls, to strengthen the wall and transfer the prestressing forces from the anchor through the wall to the bedrock. In order to maintain the important north-south transit link during the works, traffic in both directions was funnelled into just one carriageway and separated by traffic safety measures.