Battling against blow ups on the A3

Heat damage made the concrete carriageway on the motorway section between the Bayerischer Wald rest and service area and the Bogen junction a tough job. At the end of April 2015, Rädlinger Bauunternehmen started on the renovation of the carriageway. To ensure that the project could be completed on time, it was necessary to work on Saturdays as well. The entire construction site workforce – from the foremen, through the machine operators, to the construction assistants – showed great motivation and commitment.

The first construction phase provided the challenge of approx. 4km of central reservation drainage. In order to upgrade the drainage systems to the current standards, a total of 6km of drainage pipelines were laid and a rainwater retention basin was established in the course of the measure. In the second construction phase, the Rädlinger team rehabilitated the stretch in the direction of Passau, and then in the direction of Regensburg in the third phase. As part of the carriage renovation in the overlaying areas, the existing concrete surface was slackened, enlarged by the addition of further concrete strips and then built over with an approx. 28cm-thick asphalt carriageway. In the remaining inlaying rehabilitation sections, the existing superstructure was completely removed and a comprehensive renovation of the respective carriageways carried out. For this purpose, approx. 14,000m³ of concrete surfaces and hydraulically bound base layers were removed, renovated on the construction site and then reused in the lower layers of the created frost protection layers and hard shoulders. A further 45,000m³ of mainly contaminated soil was dug up and reused professionally. The asphalting of the 70,000m² areas was completed by the Selbitz branch. The superstructure rehabilitation of both structures was also able to be completed by another division of Rädlinger Group: civil engineering.


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