Overpass Weg Hesseler

from Wikipedia, the free encyclopedia

Coordinates: 51 ° 47 ′ 30 "  N , 8 ° 4 ′ 33"  E

Overpass Weg Hesseler
Overpass Weg Hesseler
Bridge seen from the south, end of September 2012
use Road bridge
Subjugated Federal motorway 2
place Beckum
construction Prestressed concrete bridge
width 6.4 m
Longest span 33 m
Construction height 1.6 m
completion August 1938
opening November 12, 1938
closure September 2012
location
Overpass Weg Hesseler (North Rhine-Westphalia)
Overpass Weg Hesseler

The transfer path Hesseler was a road bridge which in Beckum district Vellern the Federal Highway 2 at kilometer 371.9, between junctions Beckum and Oelde spanned ( old location ). The building, which has been a listed building since 1991 , was erected in 1938 and is one of the oldest prestressed concrete bridges and one of the first bridges in the world to be built using the prestressed bed method. A replacement building was put out to tender in the summer of 2012.

history

Prestressing bed prestressing (prestressing with immediate bond)

As part of the construction of the Reichsautobahn between Dortmund and Hanover , the bridge was built in 1938 by the Hesseler farmers to cross a road to a farm. Instead of the two-span reinforced concrete bridge customary at the time, a 33-meter-wide, single-span girder bridge was used, which was built with prestressed concrete with an immediate bond in accordance with the patents of Eugène Freyssinet from 1928 to 1930. The executing construction company, Neue Baugesellschaft Wayss & Freytag AG , had acquired the sole license for Germany in 1935 to use the construction method. Wayss & Freytag had the load-bearing behavior of the new construction tested between 1935 and 1938 using two prestressed concrete girders. The inventor, Freyssinet, visited the construction site and examined the building project. After the first composite prestressed concrete bridge in Germany near Beckum, a larger motorway bridge was built over the Glatzer Neisse with 14 prestressed precast beams with a span of 42.3 meters.

In 1963, the concrete cover at the Weg Hesseler overpass was increased by a layer of shotcrete about 2 centimeters thick . In 1967 the impact of a large-capacity boiler transport severely damaged a bridge girder. In 1969, the bridge superstructure was raised by 30 centimeters on the south side and 47 centimeters on the north side to improve the clearance height. In 1988 there was another repair with shotcrete, especially in the area of ​​impact damage, which was not very successful. When the motorway was expanded in the section to three lanes at the end of the 20th century, the bridge was able to be preserved by narrowing the width of the hard shoulder . In addition, the shotcrete was removed in 1998 and replaced by a surface protection system. In the following years, however, the underside of the bridge had to be hung with nets to protect against falling concrete parts, as in 1996. The bridge has been registered as a technical monument in the list of monuments of the city of Beckum since January 24, 1991. The monument notice states: "The bridge from the early days of German motorway construction is important for the development of work and production conditions [...] as it documents an important technical development step in prestressed concrete construction." On June 5, 2012, a new building was built for the replacement structure Weg Hesseler on the A 2 at BAB kilometer 371.901.

On the weekend 29./30. In September 2012, the bridge superstructure was moved from its original location to the A2 car park at the Vellern service station (direction Dortmund-Hanover), 1.5 km away, in order to preserve it as a monument.

The superstructure was repaired and is now accessible and equipped with seating. The total cost of these measures, amounting to 300,000 euros, provoked criticism from the taxpayers' association and also from the national media.

Bridge soffit
The bridge at its new location in the parking lot of the Vellern service area

construction

The superstructure of the 6.4-meter-wide bridge has a T-beam cross-section , consisting of four 1.6-meter-high individual beams with I-cross sections and a center distance of 1.4 meters, which are connected by a 27-centimeter-thick reinforced concrete deck. The design of the bridge with a 5.0 meter wide carriageway was made for the load from a steam roller weighing 7 tons and a truck weighing 6 tons.

As a memorial at the Vellern rest area on September 30, 2012

The girders were each made in one week, at the side of the bridge at the same height as the end position, with formwork made of steel segments and then moved onto the box abutments , which have a pile foundation . In the first step, the lower chord was concreted, heated and stripped. In the second step, the bar and top chord followed, with the bar stirrups also being pretensioned. 52 high-strength prestressing steels with a strength of 980 N / mm 2 and a diameter of 14 millimeters each are concreted in the lower chord and 24 steels with a diameter of 10 millimeters each in the tensioned state. After the complete concrete cross-section had hardened and stripped, the last step was to relieve the tensioning beam below the girders, which served as a tensioning bed, with a cooling device and thus transfer the pretensioning forces into the concrete of the bridge girders. The planned concrete cover is only 1.5 centimeters.

literature

  • Horst Metzler: An early prestressed concrete road bridge based on the Freyssinet method . In: Wilhelm Buschmeyer (Hrsg.): Concrete construction in research and practice. Festschrift for György Ivanyi's 60th birthday , Verlag Bau und Technik 1999, pp. 153–159.
  • Reinhard Maurer: Prestressed concrete bridges . In: Tiefbau , issue 10, year 2005, pp. 574-575.
  • David Fernández-Ordóñez: Eugène Freyssinet: “I was born a builder” . In: Manfred Curbach (Ed.): 28th Dresden Bridge Construction Symposium ; 12./13. March 2018 . Technical University of Dresden, Dresden 2018, ISBN 978-3-86780-544-5 , p. 101–126 (In PDF: pp. 103–128) ( tu-dresden.de [PDF; 23.6 MB ]). (English)

Web links

Commons : Overpass Weg Hesseler  - collection of images, videos and audio files

Individual evidence

  1. ↑ Federal Ministry of Transport, Building and Housing (Ed.): Expansion of the A 2 between the Kamen motorway junction (A 2 / A 1) and the Werder motorway triangle (A 2 / A 10) , documentation 2000, p. 29.
  2. ^ Christian Hoebel: The history of motorway construction in the German Reich between 1933 and 1945; An overview for Westphalia . In: Preservation of monuments in Westphalia-Lippe; Traffic monuments in the 19th and 20th centuries , issue 2/11 (PDF; 5.9 MB), p. 61.
  3. ^ A2: Bridge monument presented to the public , Strassen.NRW press release (September 6, 2013)
  4. ↑ Note at structurae.de
  5. ↑ Horst Metzler: An early prestressed concrete road bridge based on the Freyssinet method. In: Concrete construction in research and practice. Festschrift for György Ivanyi's 60th birthday. Verlag Bau und Technik 1999, p. 153.
  6. ↑ www.infodienst-ausschreibung.de/ausschreibung Date of publication: June 5, 2012 ( Memento of October 21, 2013 in the Internet Archive )
  7. ↑ Westfalenblatt No. 228 of September 29, 2012, p. 4
  8. ↑ K1 Magazine: An expensive wannabe memorial on kabel eins, October 18, 2012
  9. ↑ AWESOME! A bridge into nowhere becomes a monument Bild.de, October 4, 2012