Ammer bridge

Repair of the Protected Historic Melan Arches of the Ammer Bridge in Echelsbach, DE

The Ammer Bridge, also known as the Echelsbach Bridge, is a road bridge on the B23 federal highway over the Ammer Gorge in Upper Bavaria, Germany. The protected history bridge was completed in 1929 as a Melan arch bridge with the largest arch width of 130 metres at the time. The arch bridge between Rottenbuch and Bad Bayersoien is 183 metres long and lies about 76 metres above the valley floor. The actual bridge could no longer be renovated economically due to massive material fatigue, but the arches were to be preserved and repaired for reasons of monument protection as well as the environmental protection of the bat colony living inside the arches.

After the repairs, the Melan arches will be used as girders for the new formwork and will remain in place at a distance of one to two metres below the new bridge.

After numerous previous renovations and a new structural inspection, it was decided to implement the large-scale project: demolition of the old bridge deck, construction of a replacement bridge for around 10,000 vehicles a day, but preservation and repair of the Melan arches.

Based on the boundary conditions of the structure assessed by the planner’s experts, they opted for the "Repair Principle W"*: Corrosion protection of the reinforcement using our repair systems StoConcrete Repair Prime TS 203 and StoConcrete Repair Prime TG 203. The highly crack-bridging StoConcrete Protect Elastic FB (OS 5b / OS-D I) was also used as a surface protection system. Cracks in the reinforced concrete were connected and sealed with the EP injection system StoConcrete Inject IHS.

Download project report here | PDF 1,6 MB