New bridge at the Polarion ice rink
Last Friday, a heavy-duty crane was used to place the new aluminium bridge on its two supports. The construction workers had to work with millimetre precision when doing this. The new aluminium bridge weighs nearly 11.2 tonnes and spans a length of about 25 metres. A steel bridge would weigh three times as much. An aluminium bridge is also considerably cheaper and is rustproof, unlike steel.
The compensatory measures that had to be implemented on the cycle path proved to be somewhat more extensive on the right-hand side going towards Pforzheim. The new bridge was also raised by 50 centimetres when compared to the old one. The rough surface, consisting of epoxy resin (synthetic resin) and quartz sand, ensures good stability. This is especially important in winter. Such bridges are predicted to have a service life of around 100 years. However, this is on condition that they are regularly overhauled.
Electricity and sewage pipes are fitted below the bridge. There are also reserve lines, e.g. for routing a fibre-optic cable for fast internet access. Demolition of the old bridge, upgrading of the two supports, pipeline construction and the road connection work on both sides of the Nagold cost around 110,000 euros and the new bridge alone was another 60,000 euros. On top of this comes the cost for planning the entire project.
The city has spent 320,000 euros in total. Half of this amount will be borne by the state. The old bridge was probably built by engineers during the construction of the Polarion ice rink in 1980. People say that the bridge was a makeshift solution until the eastern bank of the Nagold was connected to the B 463 road. The structure was a steel girder bridge with wooden planking on reinforced concrete supports. The roadway consisted of wooden beams arranged at right angles to the steel girders. Longitudinal planks were screwed onto them as the road surface. The bridge had dilapidated recently. The stability of the central column was no longer guaranteed due to the heavily damaged wooden columns. Following an investigation it was closed to road traffic in 2014. Only pedestrians were allowed to cross it afterwards.
The town of Bad Liebenzell has a total of 36 bridges. Next, the upper arch bridge in the spa park will be demolished and rebuilt. In the November meeting, the municipal council awarded the demolition work at a cost of 97,000 euros. This is scheduled for January – February 2021.