Oker Bridge Berkenbuschstrasse
Coordinates: 52 ° 13 ′ 13 ″ N , 10 ° 30 ′ 34 ″ E
| Oker Bridge Berkenbuschstrasse | ||
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| use | Road bridge between Rüningen and Stöckheim | |
| Crossing of | Oker | |
| place | Braunschweig | |
| Entertained by | City of Braunschweig | |
| Building number | 10/3/09 | |
| construction | prestressed concrete | |
| overall length | over 39 m | |
| width | 12.25 m | |
| Clear width | 36 m | |
| height | approx. 4 m | |
| Load capacity | 60 t | |
| Clear height | 0.70 to 1.10 m | |
| building-costs | 3.3 million euros | |
| start of building | 2014 | |
| completion | October 2015 | |
| opening | October 9, 2015 | |
| Status | New | |
| planner | BPR Dipl.-Ing. Bernd F. Künne & Partner, Hanover | |
| location | ||
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| Above sea level | 74.39 m above sea level NN | |
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The Okerbrücke Berkenbuschstraße is a road bridge that connects the Braunschweig districts of Rüningen and Stöckheim and spans the Oker . The structure, which opened in October 2015, replaces several previous structures. An Oker crossing between the two places has been handed down from the 18th century.
location
The bridge crosses the Oker south of Braunschweig between Rüningen on the left and the Stöckheimer Feldmark on the right. The district road 79 runs over the bridge, which runs through Stöckheim as Rüninger Weg and along the Rüningen mill as the eponymous Berkenbuschstraße. This in turn owes its name to two previous owners of the mill. The structure is located in the Okeraue directly at the inflow of a ditch from the Stöckheim settlement area and only a few hundred meters from the underwater of the Rüninger weir. The Braunschweig – Bad Harzburg railway runs between the bridge and the mill .
The water level of the river is at normal water at an altitude of 70.95 m above sea level. NHN , the bridge's lane at 74.39 m.
Construction and design
The bridge's abutments rest on 9.5 m long reinforced concrete tubular piles, each 1.2 m in diameter. Two steel box girders with a width of 1.8 m and a weight of 60 t are stored on top. These carry reinforced concrete prefabricated parts for the roadway construction. 660 m³ of concrete and 142 t of steel were used. The bridge is equipped with street lights, with a footpath on both sides and a wider foot-bike path on the north side. In the north, the connections to the existing footpaths to the South Sea are paved. In the south, along the Wilhelm-Bornstedt-Weg, a wooden bridge has been built over the moat to replace the previous crossing. The trench was widened in front of the confluence with the Oker.
Previous buildings
Until 1963, the Oker flowed west of its current location to the mill, while the earlier free tide ran roughly in the bed of today's Oker. Crossings are recorded over both arms in the Gerlach map from 1763, so that access to the mill was also possible from the east bank.
The Oker Bridge, which existed there in the 20th century, was blown up by German soldiers at the end of the Second World War on April 11, 1945 and was later rebuilt. In the course of the regulation of the river Oker in 1963, a wooden bridge with limited load-bearing capacity was built over the now diverted and straightened river. It had two rows of pillars in the river and two ice deflectors. It was wide enough for two cars and a narrow footpath. A fungal attack was diagnosed on the load-bearing timber in 2011, so that the bridge had to be closed to motor vehicles from October 2011 and demolished in 2012. It was replaced in May 2012 by a temporary steel bridge that was rented by the city of Braunschweig. This was eliminated at the end of August 2015. At the abutments of the old Oker crossing, sheet pile walls and remains of the wooden posts are clearly and deliberately visible.
Planning the bridge and discussion
During the planning stage, there were ongoing discussions about the load-bearing capacity and location of the new Oker Bridge between committed Stöckheim citizens, the Stöckheim-Leiferde district council and the city administration on the following topics:
The city of Braunschweig had the opportunity to receive a 30 percent subsidy from the state of Lower Saxony towards the construction costs if the new bridge had a standard load capacity of 60 tons. The residents of Stöckheim feared that this would result in a considerable increase in heavy-duty traffic through the settlements, combined with increased noise pollution and a risk to school children on Rüninger Weg. The administration asserted several times that this was not planned and that there were corresponding agreements with the Rüningen mill. However, the bridge itself cannot be closed to heavy-duty traffic, since the subsidies would then be canceled. As a signal for the building management's will, the connecting roads between Leipziger Strasse and Rüninger Weg were closed to heavy traffic.
In order to enable car traffic between the districts that could only be interrupted for a short time, the bridge was planned at a location about 30 meters south of the temporary bridge that existed at the time. This project was criticized because it would involve a much higher consumption of landscape and possibly a higher level of noise pollution. The administration countered this with a detailed landscape plan and a noise protection report. The creation of compensation areas on the Thiedebach in Leiferde and on the Springbach in Melverode was integrated into the construction project . In the course of the planning approval procedure, an expert report for flood protection was also drawn up and the passage cross-section designed accordingly.
The district council approved the administrative project in December 2012. The responsible council bodies approved the planning after a public hearing in December 2012.
Web links
Individual evidence
- ↑ Planning office BPR: building plan Okerbrücke Berkenbuschstraße , March 29, 2012.
- ^ City of Braunschweig: New Okerbrücke Berkenbuschstrasse opened , press release of October 9, 2015.
- ↑ JHD Gerlach: Topographic Map of the Duchy of Braunschweig. The Wolfenbüttel District , Lower Saxony State Archives Wolfenbüttel K3 sheet 1a.
- ↑ Hermann Nolte: History of the mill Rüningen Aktiengesellschaft in Wilhelm Bornstedt: Chronik des Pfahldorfes Rüningen , Braunschweig 1980, p. 157
- ↑ Citizens' initiative traffic concept for the new construction of the Stöckheim bridge. Retrieved October 12, 2015 .
- ↑ City of Braunschweig: Planning approval for the new construction of the Okerbrücke Berkenbuschstrasse on the K 79 between Rüningen and Stöckheim , February 4, 2013, website of the City of Braunschweig.