Werratal Viaduct (A 71)

Werratal Viaduct (A 71)
Technical specifications
length	1194.4 m
Max. Span	85 m
Superstructure width	2 × 14.25 m
Construction height	2.1m-4.85m
Max. Height above valley	34 m
system	Haunched steel composite plate beams

The viaduct Werratal is 1194.4 m the longest bridge of the motorway 71 , and until the completion of the Ilmtalbrücke the new Ebensfeld-Erfurt the longest Thuringia .

The bridge is located at kilometer 149.5 between the Meiningen -Nord and Meiningen-Süd junctions and spans the Werra valley with 18 fields at a maximum height of 34 m at Einhausen with the federal road 89 and the Grimmenthal-Themar railway line . The structure has a ground plan radius of 1000 m, with a longitudinal slope of 1.3% to the south. The bridge with two separate superstructures was built between 2000 and 2003 at a cost of around 25 million euros.

Foundation and substructures

The northern abutment is flat, the southern one built on large bored piles with a diameter of 1.5 m. The piles under the 17 pillar axes have a diameter of 1.2 m. The octagonal pillars with a maximum height of 28.5 m have a full cross-section and are widened to a striking Y-shape to accommodate the bearings over the last 7.5 m to the lower edge of the superstructure.

Superstructures

Steel boxes with head bolt dowels

The two adjacent superstructures of the composite steel bridge have the continuous beam in the longitudinal direction as a structural system , and in the transverse direction they are designed as two-web T-beam cross- sections. The two main girders of the T-beams consist of airtight welded steel box girders, which are haunched with construction heights of 2.1 m to 4.85 m. The connection with the 28.5 m wide reinforced concrete deck is made by head bolt anchors . The spans of the two 18-span superstructures are 50 m + 61 m + 65 m + 70 m + 75 m + 75 m + 80 m + 85 m + 80 m + 75 m + 70 m + 65.3 m + 4 × 62 , 72 m + 55.22 m + 37.0 m.

execution

The steel boxes of the main girders were delivered by truck in lengths of 31 m to a maximum of 50 m . These were then lifted in with a truck crane and then welded together. In the case of longer bridge spans, two segments were welded together before lifting. Finally, the reinforced concrete deck slab was produced in sections with two formwork carriages , with the deck slab being produced first in the middle of the field and then the gaps above the support areas.

literature

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

Web links

Commons : Werratal Viaduct  - Collection of images, videos and audio files

• Werratal viaduct (A 71). In: Structurae

Coordinates: 50 ° 31 ′ 40 ″  N , 10 ° 28 ′ 34 ″  E