Peene Valley Bridge
Coordinates: 53 ° 55 ′ 30 ″ N , 13 ° 20 ′ 58 ″ E
 Peene Valley Bridge
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| Convicted | Federal motorway 20 | |
| Crossing of | Peene | |
| place | Jarmen | |
| construction | Composite steel bridge Prestressed concrete bridge |
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| overall length | 1111.6 m | |
| width | 2 × 12.0 m | |
| Longest span | 95 m / 42 m | |
| Construction height | 3.0-4.5 m / 2.7 m | |
| height | 13 m | |
| building-costs | 70 million DM | |
| start of building | 1998 | |
| completion | 2001 | |
| location | ||
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The Peene Valley Bridge , originally and in the literature as Peenebrücke Jarmen called, is a bridge over the motorway 20 in Mecklenburg-Vorpommern . It spans a total unsupported length of 1,111.6 meters, the national road 35 (until 2006: B96 ) and the Peene and the adjoining areas of the Peene valley . The bridge is the second longest after the Ueckertalbrücke and, with construction costs of around 70 million DM, the most complex motorway bridge on the A20. The overpass structure, with its curved plan, is located east of Jarmen between the Gützkow and Jarmen motorway junctions and crosses a flow moor and a bird sanctuary .
The maximum 13 meter high bridge has 26 fields and is divided into a 542.2 meter long, 14-field foreland bridge south, the 320 meter long, six-field river bridge and the 249.4 meter long, six-field foreland bridge north. The overpass with two separate superstructures was built between 1998 and 2001. The client was the Deutsche Einheit Fernstraßenplanungs- und Baugesellschaft mbH (DEGES).
Approach bridges
The approach bridges are prestressed concrete structures with two separate superstructures, which have the continuous beam as a structural system in the longitudinal direction . In the transverse direction, the superstructures have a single-cell box girder cross-section with a 12.0 meter wide deck and vertical walkways. The construction height is a constant 2.7 meters. The prestressing consists of internal tendons in the longitudinal direction . The spans for the north foreland bridge are 32.2 meters, 2 × 35.0 meters and 11 × 40.0 meters and for the south foreland bridge 5 × 42.0 meters and 39.4 meters.
The superstructures of the approach bridges were built from the abutments using the incremental launching process with incremental lengths of around 20 meters every week.
River bridge
The river bridge is a steel composite construction with a box girder cross-section and two separate superstructures, which have the continuous girder as a structural system in the longitudinal direction. The webs of the steel troughs are connected to the reinforced concrete deck using headed bolt dowels . The top chords are 5.8 meters apart, the box webs have a constant incline of 1:15, which means that the base plate width varies between 5.5 meters and 5.26 meters depending on the trough height. The deck is 12 meters wide and with a variable cross-section height above the main girder webs, a maximum of 45 centimeters thick. In the longitudinal direction of the superstructure in the region of the main opening are haunched formed. The construction height is a maximum of 4.5 meters above the two pillars, 3.0 meters in the middle of the river and 2.7 meters at the ends of the bridge. The spans of the six-span superstructures are 3 × 40.0 meters, 52.5 meters, 95.0 meters and 52.5 meters. While an expansion joint is arranged on a separating pillar between the river bridge and the northern foreland bridge , there is a rigid connection with the southern foreland bridge.
The steel troughs were delivered by ship in sections of around 40 meters in length and lifted in with a ship's crane, and the reinforced concrete deck was made in sections with a formwork carriage .
Foundation and substructures
With the exception of the northern abutment , all substructures are built on large bored piles with a diameter of 1.3 meters. The 338 bored piles are up to 16 meters in length. In order to minimize the stress on the landscape from the construction of construction roads, most of the piles were made from the open water with the help of a pontoon , for which purpose peat pits had to be made in the bridge route at the beginning . Temporary sheet piling boxes were also placed around the pile groups, with pile head plates and bridge piers to protect them.
As a rule, there are two round pillars with a diameter of 1.2 meters for each superstructure in the pillar axes. The dividing pillars have a diameter of 2.4 meters to accommodate the two bearings , the pillars next to the main openings are 1.6 meters in diameter. In the area of the acute-angled intersection with the main road, instead of a pair of pillars, only a single pillar with a diameter of 1.6 meters is arranged in the middle. The pairs of pillars are connected to each other at the head by cross bars.
Environmental and nature conservation aspects
The Peene Valley Bridge has a bridge area of around 26,000 square meters . To reduce land consumption , the motorway was laid out with the special cross-section SQ 23.0 in the structural area, which has no hard shoulder and a reduced median width. Further equipment features for environmental and nature protection are the use of a noise-reducing road surface and sealed protective walls for the discharge of splash water. The speed limit in the course of the structure is 100 kilometers per hour.
An area of 186 hectares was renatured in the Peene Valley to provide ecological compensation for the construction of the motorway . The construction of the bridge and the route of the motorway through the ecologically sensitive Peene Valley were highly controversial and were accompanied by sometimes intense protests, including a hut village built by opponents of the motorway near the town of Breechen . The raised bog beetle ( Carabus menetriesi menetriesi ) became a symbol of the ultimately unsuccessful resistance, but also to some extent for the rejection of nature and landscape protection demands that were exaggerated from the point of view of the motorway proponents .
literature
- Federal Ministry of Transport, Building and Urban Development: Bridges and tunnels on federal trunk roads 2001 . Deutscher Bundes-Verlag, Cologne (Germany) 2001, ISBN 3-935064-09-8 .
- Karl Heinz Holst, Ralph Holst: Bridges made of reinforced concrete and prestressed concrete: design, construction and calculation. 5th edition. Ernst & Sohn, Berlin 2004, ISBN 3-433-02837-0 , p. 130
- H.-J- Ralf: The Peene Bridge near Jarmen on the A20 Lübeck – Stettin motorway . In: Tiefbau , 5/2000, pp.256–259 (PDF)
Web links
Individual evidence
- ↑ bridge shield
- ↑ Federal Government: Road Construction Report 1999 , German Bundestag printed matter 14/2488, December 14, 1999, p.102 (PDF; 933 kB)
- ↑ Federal Ministry of Transport, Building and Urban Development: Bridges and tunnels on federal trunk roads 2001 . Deutscher Bundes-Verlag, Cologne (Germany) 2001, p. 168
- ↑ TUHH Institute for Structural Analysis & Steel Construction: Peene Valley Bridge on the A 20 . In: bridge database