ÖBB introduced novel railway bridge support structure
ÖBB has for the first time installed a pre-fabricated railway bridge support structure with much thinner and lighter concrete walls than usual. The solution was tested by the the Vienna University of Technology, a partner in the project.
“With the first application on the Pinkabach Bridge, ÖBB has made a decisive contribution to the further development of this innovation”, Johann Kollegger, Professor of Concrete Construction at Vienna University of Technology, said in a reaction on the news. The bridge was installed near the village of Haideggendorf.
The bridge structure consists of concrete box girders that have a wall thicknesses of some 15 centimetres, whereas this would normally be in the range of 25 to 30 centimetres. The pre-fabricated parts require less concrete as a result, thus lowering the CO2-footprint of the parts. Because they are also lighter and easier to install, the construction process is faster, too. One of the downsides is that the thinner pieces need to be handled with more care during installation.
The bridge slab consists of two precast parts, measuring 19.05 and 3.33 metres in length, respectively. The bigger piece tips the scale at 60 tonnes, the smaller weighs in at around 5.5 tonnes.