📋 Tender Overview
The Danube Bridge Stein-Mautern has existed since 1895. On May 8 1945 the two southern bridge fields were blown up and rebuilt after the end of the war with so-called Roth-Waagner devices war bridge devices. The three bridge fields in the north on the Stein side are still the original bridge structures from 1895. Due to its age of 125 years and the not inconsiderable volume of traffic of around 11000 vehicles per 24 hours the bridge is currently in a roadworthy but urgently in need of renovation.Bridges are subject to structural monitoring at regular intervals with regard to their reliability and traffic safety. In addition to ongoing monitoring a bridge test is carried out every six years. The state of preservation is ascertained documented and assessed by a competent engineer. Due to the age of this Danube bridge the interval between the bridge inspection and status assessment had to be reduced to one year. An already imposed tonnage limit of 16 tons was reduced to nine tons in September 2020. The routine inspection of the Danube bridge has shown that permanent renovation appears inevitable in the foreseeable future. As an immediate measure according to this test report a load limit of five tons from 7. December 2020 and a width restriction of the footpath and bike path required. In order to slow down the rapid progress of corrosion a switch is made from salt to grit spreading in winter. These measures are or have already been implemented.According to the expert opinion the main problem areas are on the one hand the progressive corrosion of structural parts in areas that can only be repaired with difficulty or not at all with traffic An uncontrolled drainage of the chloride-containing surface water due to the design accelerates the corrosion and reduces the load-bearing capacity of the structure. The screws and rivets in the gusset plates are also badly affectedIn order to ensure the use of the Danube crossing a repair or renewal concept is currently being worked on. This will be coordinated with the region the Federal Monuments Office and the World Heritage Site and submitted for approval. After the approval process has been completed the tenders and work on the construction of a temporary makeshift bridge will begin immediately so that the necessary traffic flow is hindered as little as possible. After the completion of this temporary bridge the actual bridge construction work can begin.
