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Refurbishment of masonry tunnels through the example of the Kirchberg Tunnel for the DB Netz AG

Abstracten The finance available for the refurbishment of tunnels was around EUR 125 m. in 2014, which will increase to EUR 213 m. by 2018. DB Netz AG has a total of more than EUR 1 billion available in the medium term for the refurbishment of existing tunnels. This paper deals with the refurbishment of masonry tunnels of the DB Netz AG, Region South. The basis is the typical damage patterns of masonry tunnels, their causes and the possible refurbishment opportunities. On the Kirchberg Tunnel project, a feasibility study was carried out into possible repair measures. Based on the results of the study plans are now running. The article is supplemented by the latest state of the art rules for maintenance work in the area of tunnel construction at DB AG. The necessity of programmes for tunnelling, the necessary economic and operational constraints as well as experience with completed repairs to masonry tunnels conclude the article from the viewpoint of the owner and operator.


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