Siegtalbrücke

from Wikipedia, the free encyclopedia

Coordinates: 50 ° 50 ′ 55 ″  N , 7 ° 59 ′ 17 ″  E

A45 Siegtalbrücke
Siegtalbrücke
use Federal motorway 45
Subjugated Siegtal
place Eiserfeld
construction Girder bridge
overall length 1050 m
width 30.5 m
Number of openings 12
Longest span 105 m
height 106 m
start of building 1964
completion 1969
draft Hans Wittfoht
location
Siegtalbrücke (North Rhine-Westphalia)
Siegtalbrücke

The Siegtalbrücke (or Eiserfelder Brücke ) is a motorway bridge between junction 21 (" Siegen ") and 22 ("Siegen-Süd") of the A 45 . It crosses the Siegtal near Eiserfeld , a district of Siegen. The bridge was built from 1964 to 1969 based on a design by Hans Wittfoht . After the Nuttlar viaduct, which was completed in 2016, the bridge is the second highest bridge in North Rhine-Westphalia.

Technical details

With a height of almost 106 meters, it is the highest valley bridge on the A 45 and one of the highest motorway bridges in Germany . In the area of ​​the bridge, the route of the motorway has a radius of 1,400 m and a cross slope of three percent.

The 1,050 m long structure along the motorway axis consists of two separate prestressed concrete superstructures , with the continuous beam as a structural system in the longitudinal direction. The spans of the twelve-span bridge are 63.0 m + 75.0 m + 90.0 m + 4 × 105.00 m + 96.0 m + 90.0 m + 81.0 m + 71.0 m + 64, 0 m. In the transverse direction, the superstructures are designed as single-cell, parallel- belt prestressed hollow boxes with a constant construction height of 5.80 m. The slab width is 30.50 m, the slab width 7.0 m. The 11 pillars of reinforced concrete have a hollow cross-section with 30 cm wall thickness and perpendicular to the bridge axis 20.7 m wide. In bridge longitudinal direction, the pillars have a suit of 1:40 and m wide at the pier head 3.5.

A special feature of the Siegtalbrücke is that a 110 kV overhead line runs under it.

Working on the bridge

At the beginning of the 1990s, the bridge was provided with transparent protective walls as fall protection.

In 2003 the bridge caps were renewed. Instead of crash barriers , a concrete crash barrier was installed to prevent trucks from falling. In addition, a 2.50 m high railing with wire mesh was erected as a more effective climb-over protection.

The bridge was completely renovated in 2005 and 2006. In addition to the renewal of the roadway and the bridge sealing, noise-reducing roadway crossings were installed at the beginning and at the end of the bridge. In addition, the planks in the median were replaced by concrete guide walls. The total cost of the repair was approximately 7.6 million euros.

New building

Due to the age of the bridge and the growing traffic load, the bridge is to be replaced by a new building from 2027.

Web links

Commons : Siegtalbrücke  - collection of images, videos and audio files

Individual evidence

  1. Information event on the demolition and new construction of the Siegtalbrücke WDR, September 18, 2019