Schnettker Bridge
Coordinates: 51 ° 29 ′ 52 ″ N , 7 ° 26 ′ 8 ″ E
 Schnettker Bridge
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| use | Motorway bridge with sidewalks and bike paths | |
| Convicted | Federal motorway 40 | |
| Crossing of | Emscher | |
| Subjugated | Elberfeld-Dortmund railway , railway line Dortmund-Soest and operating tracks of the DB AG | |
| place | Dortmund | |
| construction | two-part four-span continuous girder - composite steel construction , main opening as central girder arched bridge | |
| overall length | 328 meters | |
| width | 41.6 meters | |
| Construction height | 3.8 meters | |
| vehicles per day | 100,000 (2015 forecast, roads in North Rhine-Westphalia) | |
| building-costs | € 42 million | |
| start of building | September 9, 2005 | |
| completion | May 31, 2012 | |
| location | ||
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| Above sea level | 100 m | |
The Schnettkerbrücke is a motorway bridge over the Emschertal in Dortmund . The bridge complements the Rhineland dam on which Bundesstraße 1 runs in the west of the urban area . The Schnettker Bridge is part of the section of the B1 that has been rededicated as the federal motorway 40 .
Location and history
The Schnettker Bridge is located on the western edge of Dortmund city center and connects the western slope of the Dortmund ridge to the Emscher valley with the northern foothills of the Ardey Mountains in the southwest of the city area. In addition to the Emscher, it spans two railway lines, the Elberfeld – Dortmund railway line opened in 1848 to the west and the Dortmund – Soest railway line, which is 10 years younger, east of the Emscher, the Dortmund – Hörde freight train line and a station siding operated by Rothe Erde , a total of seven in operation Tracks, as well as the two disused tracks on the former Dortmund – Witten freight train line. In addition, from 1929 to 2006 there was a junction called "Schnettkerbrücke" just east of the bridge .
The construction of the first bridge started before the First World War; however, it was not completed. It was named as the "Bridge over the Schnettkertal" after the former Hof Am Schnettker on the property at Baroper Straße 171 near the confluence of the Leierweg, a Kotten that went back to the fruit grower Friedrich Schnettker.
In 1931 the bridge was rebuilt as a riveted steel framework construction. The four-lane, approximately 310 m long bridge was supplemented on the north side by a footpath and cycle path in 1946, which has been of particular importance since 1969 as an important connection from the Dortmund city center to the Technical University of Dortmund . In addition, the allotment gardens located directly below the bridge between the railway lines could be reached on foot from this path via a staircase . The southern part of the bridge was also given a footpath and cycle path. A downward exit was / is only possible via the northern footpath and bike path for both the old and the new bridge.
When the Ruhr Expressway was expanded in 1957, the bridge was widened on both sides by around 2.50 m along its entire length. The existing concrete roadway was replaced by a lightweight roadway ( orthotropic slab ) and the supporting structure for bridge class 60 was reinforced. This construction was no longer able to cope with the traffic load, which had risen to around 80,000 vehicles a day in 2005 and continued to grow.
Demolition and new construction
With the widening of the Rhineland dam to six lanes, the bridge was demolished and rebuilt from September 9, 2005 onwards while it was still in operation. The individual steel elements of the southern and northern partial bridges were assembled on a pre-assembly area west of the bridge next to the road to the trough profile and then moved in sections by incremental shifting across the Emscher Valley to the abutment. Subsequently, respectively by means of formwork , the pavement slabs concreted, supply lines, sewer lines and for controlled by an ice warning system anti-icing installed and set the bridge cap with pedestrians and cyclists.
First, the new southern building was erected next to the old Schnettker Bridge. In the winter of 2005/2006 there were considerable delays because the foundation of the girders had to be compacted in order to establish the foundations and the change in the statics required additional steel deliveries. In addition, unfavorable weather held up the foundation work this winter. At the end of 2007, the new steel profile spanned the Emschertal. After completion of the installation, concreting and asphalting work, the new building was released on September 1, 2008. A week later, traffic was led in both directions on two lanes over the new south bridge.
The old bridge on the north side was then torn down. Two out of four sections had to be broken off by hand with welding torches, and rail traffic also had to be taken into account. Above the tracks, the demolition work could only be carried out at night, between around 0.30 a.m. and 3 a.m. As a result, the demolition took a year more than planned. The remainder of the old steel framework construction was blown up on the night of September 7, 2009. At the site of the old bridge, a new building with three lanes and one hard shoulder was also built, which accommodates traffic in the direction of Bochum . The steel substructure of the north bridge reached the eastern abutment at the end of September 2010.
Both superstructures were finally by transverse struts with a bright crimson connected painted steel sheet, which absorbs part of the expense of construction over eight rods and hanger derived. Until the arch was completed, additional auxiliary supports were required in the middle of the main opening, for which the support of the old Schnettker Bridge was used on the north bridge. During the foundation work on the foundations of the arch axes in the summer of 2009, considerable problems with the soft subsoil again occurred. On the night of May 5, 2011, the arch feet were brought into their positions and mounted on their foundations. At the end of May 2011 the connecting struts were welded to both parts of the bridge. The arch was delivered in five individual parts on heavy haulage during the night of July 7, 2011 and then welded together at the pre-assembly area, brought to its position on the north bridge above the main opening on August 19, 2011, until September 5, 2011 with the Hangers provided and painted on September 9th and 10th. On September 11, 2011, it was erected using a specially developed lifting device consisting of six hydraulic presses and a guide rod anchored in the bridge plate and welded to the end segments on the nights of September 15 and 16, 2011. The difficult welding work to connect the hanger rods to the cross members of the bridge plate was completed on the morning of November 7, 2011 after full closures on five consecutive weekends. With the lowering of the bridge structure by up to 30 cm, the arch has taken on its static function.
In mid-January 2012, the temporary supports were dismantled and the cycle path on the north side, including a stair tower to the allotment garden, was completed. The final work, the construction of a rain retention basin at the western foot of the arch, the delayed installation of the partially transparent noise barriers due to delivery problems with the glass elements and the installation of protective walls on the median, were completed in May 2012. On September 12, 2011 the installation of the spray heads of the de-icing agent spraying system began in the asphalt of the north bridge, on June 11, 2012 on the southern part of the bridge. The system was connected in autumn 2012.
The entire new building was gradually released for road traffic. Initially, it continued to run on two lanes in each direction of travel. Since March 24, 2012, traffic in the direction of Bochum has been flowing over the northern part of the bridge. First the outer lanes were used for this. With the completion of the work on the median and some remaining earthworks, the inner lanes were released on April 14, 2012 and the outer lanes were closed for assembly work on the noise barriers. At the beginning of May 2012, the elements of the noise barriers were installed on the north side. Over one hundred aluminum elements intended for the south side and to close the crossings from the route to the bridge at the bridge corners were stolen by strangers between May 5 and 8, 2012, replacements could be delivered immediately. After the installation of the southern noise barrier and the final cleaning work, the construction project was officially approved on May 31, 2012. Since then, the vehicles have been able to use three lanes in both directions. After a last temporary restriction to two narrowed lanes in the direction of the city center due to work on the de-icing agent spray system, traffic has been flowing unhindered over the bridge since June 16, 2012.
Data of the new Schnettker bridge
The new Schnettker bridge is a two-part four-span continuous girder structure in composite steel construction , which is designed in the area of the main opening as a central girder arched bridge with a roadway in the middle. The bridge board has a total width between the railings of 41.60 m and an area of 13,228 m² and a beam height of 3.80 m. The girders on both sides of the main opening are asymmetrical V-shaped hollow box steel girders. The steel arch has a radius of 89.70 m, an arrow height of 28.00 m and a pitch above the roadway of 15.98 m, a span of 132 m, its cross-sectional dimensions are 1.80 m × 1.50 m. The hangers have a diameter of 220 mm. The southern bridge is 328 m long and the northern bridge 308 m long, the fields to the west of the arch each 68 m, east of the arch on the south bridge 73 m and 55 m, on the north bridge 59 m and 49 m wide.
The executing company for the entire new building was Schachtbau Nordhausen GmbH . The Salzburg office MCC Dipl.-Ing. Cerin Consulting ZT GmbH. The static test was carried out by Weyer Beratende Ingenieure im Bauwesen GmbH. EHS Consulting Engineers for Construction GmbH were commissioned to supervise the construction.
The elements of the steel substructure of the bridge, a volume of approx. 4,000 t of steel, were manufactured by SAO "Kurganstalmost" in Kurgan , Siberia. The 430 t heavy steel arch comes from Schachtbau GmbH from Nordhausen , the hanging rods were manufactured by Anker-Schroeder.DE ASDO in Dortmund. A total of 11,300 m³ of reinforced concrete was used. The construction costs amounted to approx. 42 million €.
Others
The new junction 44 “DO-Barop” was built directly to the west of the bridge as part of the construction work . Even before the construction work was completed, the road previously known as Bundesstrasse 1 was upgraded in December 2009 from the Dortmund-West motorway junction via the Schnettkerbrücke to junction 45 “Dortmund” (L 660) to become the 40 federal motorway. Total construction costs of € 99 million were estimated for the conversion of this 4 km long section.
During the work at the beginning of 2009, fossilized remains of a predatory dinosaur from the early Upper Cretaceous period were found.
Web links
Individual evidence
- ↑ It all started with Bauer Schnettker . the west, October 4, 2011
- ↑ Construction work on the Schnettker Bridge ended faster . the west, November 8, 2011
- ↑ Schnettker Bridge - blocking is canceled . Ruhr Nachrichten, November 10, 2011
- ↑ Schnettkerbrücke construction site . Ruhr Nachrichten, September 22, 2011
- ↑ Schnettker Bridge completed after six years . the west, November 17, 2011
- ↑ Straßen NRW press release, June 8, 2012 ( Memento of the original from October 28, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Schnettker Bridge can be used on both sides again . Ruhr Nachrichten, March 25, 2012
- ↑ The construction site on the middle lane will remain . Ruhr Nachrichten, March 26, 2012
- ↑ Traffic slows down at the B1 Schnettkerbücke ... der west, April 13, 2012
- ↑ Noise protection elements stolen . Ruhr Nachrichten, May 16, 2012
- ↑ She had to go for seven years . the west, May 25, 2012
- ↑ Straßen NRW press release, May 23, 2012 ( Memento of the original from October 28, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ The Schnettker Bridge in Dortmund will soon no longer be a construction site . the west, May 23, 2012
- ↑ Schnettker Bridge construction work before completion . Local compass, May 26, 2012
- ↑ Just clean . Radio 91.2, May 30, 2012
- ↑ The gate to Dortmund is now open . the west, May 31, 2012
- ↑ The new construction of the Schnettker Bridge should reduce the number of accidents . the west, May 31, 2012
- ↑ Schnettker Bridge is really free now . Ruhr Nachrichten, May 31, 2012
- ↑ Large train station for the Schnettker Bridge . Local compass, June 1, 2012
- ↑ Refurbishment from September - B1 in Dortmund remains a construction site . Ruhr Nachrichten, January 10, 2012
- ↑ Straßen NRW: Press release, May 31, 2012 ( Memento of the original from June 3, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ Regional Association Westphalia-Lippe .
