Haseltal viaduct (A 71)

Haseltal viaduct (A 71)
Technical specifications
length	724/714 m
Max. Span	65 m
Superstructure width	2 × 14.25 m
Construction height	3.5 m
Max. Height above valley	22 m
system	Prestressed concrete box bridge

The viaduct Haseltal is 724 m, the longest prestressed concrete beam bridge the Bundesautobahn 71 .

The bridge is located at km 147 between the Meiningen -Nord and Meiningen-Süd junctions and crosses the Hasel valley near Ellingshausen from the eastern slope of the Küchenberg to the western slope of the Bitthäuser Berg . The Hasel with the state road 1131 between Ellingshausen and Rohr as well as the Neudietendorf – Ritschenhausen railway line are spanned at a height of a maximum of 22 m with 12 fields . The motorway has a radius of 1000 m starting at the north abutment for a length of 248 m, followed by a 395 m long section with a turning clothoid (A = 450) and finally an arc with a radius of 1050 m. The longitudinal gradient is mostly 0.78% to the south. The bridge with two separate superstructures was built between 2000 and 2004 at a cost of around 13 million euros.

Foundation and substructures

The abutments and piers are based on large bored piles with a diameter of 1.2 m and lengths between 17 m and 20 m. Eight piles were placed under 1.5 m thick pile head plates in the column axes. The square pillars with heights between 16 m and 20 m have a square full cross-section rotated by 45 ° with a side length of 1.8 m. The pier heads are connected to one another by bolts to accommodate the bearings .

Superstructures

Box-girder cross-section of a prestressed concrete bridge

The two adjacent superstructures of the prestressed concrete bridge are continuous girders with a box girder cross-section and constant construction heights of 3.5 m. The prestressing consists of a mixed construction with internal and external tendons .

The spans for the 12-span bridge are 51 m + 8x65 m + 62 m + 50 m + 41 m for the northern superstructure and 51 m + 8x65 m + 62 m + 50 m + 31 m for the southern superstructure.

execution

Due to the complex geometry of the ground plan, the two superstructures of the bridge were built with a telescopic arm, which carried the loads via steel auxiliary piers.

Specialty

Due to the insolvency of the shell construction company, the completion of the second superstructure was delayed by a year.

literature

• DEGES: Bridge structures in the new federal states . Ernst & Sohn, Berlin (Germany), 2004. ISBN 3-433-01700-X

Web links

Commons : Haseltal Bridge  - Collection of images, videos and audio files

• Haseltal viaduct (A 71). In: Structurae

Coordinates: 50 ° 33 ′ 12 ″  N , 10 ° 28 ′ 29 ″  E