Bauer remediates railway embankments

DB Netz AG commissioned Bauer to remediate a total of three railway embankments.© BAUER Group

Vilseck, Germany – Deutsche Bahn has announced that it is investing around EUR1.6 billion in Bavaria this year to improve the quality of the rail network. From April, the line between Neukirchen near Sulzbach-Rosenberg and Vilseck was also remediated. Railway line 5060 is a branch line of the Nuremberg-Schwandorf line which branches off at Neukirchen in the direction of Weiden. Tilting technology – a function which allows the trains to run faster – and freight trains have not been allowed on the line since 2016 because the old line could no longer safely handle high speeds or heavy loads. With the remediation of the approximately 11 km section of track between Neukirchen and Vilseck, the line has now been modernized and the tracks have been extended. BAUER Spezialtiefbau GmbH was commissioned by DB Netz AG to remediate a total of three railway embankments.

While the line was closed completely, around 42,000 m² of individual Mixed-in-Place (MIP) panels were manufactured. “This is very unusual and a first for us,” said Stefan Ferstl, project manager at Bauer Spezialtiefbau. To carry out the work in MIP method, Bauer obtained permission from Deutsche Bahn to conduct operational testing due to the company’s high safety standards. “We were able to implement this method of using the existing soil directly as aggregate for the required concrete pillars for the first time in a railway embankment.” Overall, around 2,700 individual panels were manufactured on three different embankments.

In order to keep to the tight schedule and to get the line up and running again as soon as possible, six teams worked on the drilling, each with two rigs for the day and night shift. They also worked on public holidays and a weekend. A RTG RG 27, an RG 25 and two RG 19 rigs as well as a BAUER BG 24 were used. To further stabilized the embankment, approximately 50,000 m² of geogrid was laid and around 10,000 t of cement and 180 t of flow agent were used – another logistical challenge.

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