Prefabricated DYWIDAG Tendons for busy highway interchange - Neufahrn

The Neufahrn interchange is one of the major traffic interfaces north of the city of Munich in southern Germany. At this location, the north-south traffic circling Munich meets the west-east tangent.

Moreover, most of the traffic to and from the prospering Munich airport has to pass through the Neufahrn interchange. Currently, approximately 25,000 vehicles use the interchange per day. Recent forecasts indicate that the traffic volume will grow to 38,000 vehicles per day by 2020.

Based on these studies, it was considered absolutely necessary to increase the capacity of what is now a bottle neck. In total, five new bridges have been constructed and five existing bridges have been improved since the start of construction in 2009.

The center piece of the extension of the Neufahrn interchange is an elevated, two-lane crossing that leads across the very busy A9 highway, guiding traffic from the east and the airport in the southerly direction onto the A9.

The crossing consists of three reinforced concrete bridges at a height of up to 15m over the interchange. The loads are transferred to the ground by large abutment piers via drilled piles. 2,500m² of concrete were used to construct the abutment piers for the three bridge structures.

For the improvement and extension of the Neufahrn interchange, DSI supplied approx. 227t of Type SUSPA Systems prefabricated tendons with MA Anchorages, bond head anchors and couplers.

Moreover, DSI installed all tendons, 22-0.62", grade 1860, 150mm², and carried out the post-tensioning and grouting work for the various bridge structures according to DIN 1045-1 and DIN FB 102.

Work at Neufahrn interchange was successfully completed by the end of 2011.