Poya Bridge
Coordinates: 46 ° 48 '47 " N , 7 ° 9' 55" E ; CH1903: 579128 / 184687
| Poya Bridge | ||
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| use | Road bridge | |
| Crossing of | Saane | |
| place | Freiburg in Üechtland | |
| construction | Cable-stayed bridge | |
| overall length | 851.6 m | |
| width | 19.25 m | |
| Longest span | 196 m | |
| Construction height | 110 m | |
| height | 70 m | |
| start of building | October 31, 2008 ( groundbreaking ceremony ) September 3, 2010 ( laying of the foundation stone for the bridge) |
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| opening | October 12, 2014 | |
| location | ||
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| Above sea level | 609 m above sea level M. | |
The Poya Bridge ( French: Pont de la Poya ) is a road bridge over the Saane in Friborg , Switzerland , which was opened to traffic on October 12, 2014.
History and preliminary project of the connecting road
The city of Freiburg im Üechtland has built many bridges in its area since the city was founded in the Middle Ages, and it also has a long tradition of suspension bridges (see also Zähringer Bridge ). The Poya Bridge (named after La Poya Castle at the western end of the bridge) opened a new road connection between Murtenstrasse in the northwest and Bernstrasse in the east, thereby enabling the Zähringer Bridge to be closed for private car traffic and relieving the old town area around the St. Nicholas from through traffic. In the planning phase it was assumed that around 25,000 vehicles would pass the Poya Bridge every day.
Since 1959, numerous studies have been carried out to create a new crossing over the Saane. In 1989 the city of Freiburg invited five engineering office communities to compete for the new connecting road and the Poya bridge. The submitted designs were evaluated according to the following criteria:
- Concept and construction technology
- Aesthetics and integration into the urban environment
- Traffic and security
- economics
The project of the competition winners, an office community of the companies GVH (P. Gorgé, A. Vaucher, B. Houriet), Brugger & Clément & Collaud, Zwahlen & Mayr and Schneider & Chablais, was developed into a detailed preliminary project in the following years and the responsible Bodies of the federal government, the canton and the city of Friborg are presented.
In 1995 the building project was transferred from the city to the canton of Friborg, which lists the Poya Bridge as cantonal road H 182. In 1997 the federal government classified the bridge as part of the Swiss main road network.
In autumn 1999 the project was launched publicly. The Federal Commission for the Preservation of Monuments and the cantonal commission for cultural property complained that the route was too close to the Villa Paladine, known as "Château de la Poya" ( location ) . Furthermore, new safety standards when building tunnels required a minimum distance between a tunnel exit and the next intersection. The previously planned route with the tunnel in the St-Léonard district became obsolete and had to be comprehensively revised. This resulted in the project with bridge, tunnel and underground roundabout , which was finally implemented.
Bridge construction
At 196 m, the middle section of the 851 m long cable-stayed bridge has the longest span in Switzerland.
The two lateral sections, braced by cables, have a span of 86 m, the side sections are 35 to 54 m. The bridge has three lanes for motorized traffic and a 3.5 m wide lane for pedestrians and cyclists. It has a constant gradient of 2% and leads from 592 m above sea level. M. on the western at 609 m above sea level. M. at the east end. Adjacent to the tunnel on the west side, the first 160 m of the bridge are provided with a noise protection cover.
The floating bridge has half-fan rope bracing for the middle section. The lateral viaducts form a continuous beam. The pylons are monolithically connected to the deck slab so that the bridge has the necessary longitudinal stability.
For the construction of the Poya Bridge, the excavation was 44,000 m 3 , 16,000 m 3 of concrete and 2,800 tons of reinforcement were used , the steel structure weighs 3,530 tons and the stay cables 177 tons. 720 anchors secure the structure.
costs
In May 2012, the expected costs for the entire expansion including the bridge were estimated at CHF 211 million. The financial coverage from the originally approved cantonal and federal contributions, a project change for the connection in the St-Léonard quarter and the inflation rate at that time amounted to CHF 179.4 million. In the referendum on September 24, 2006, the voters of the canton of Friborg approved the cantonal contribution of 58 million francs (adjusted for inflation: 65.2 million) to the construction of the bridge and the access road with a yes share of 81%. At that time, total costs of CHF 120 million (excluding inflation) were expected.
Construction progress on October 6, 2012
Construction progress on October 6, 2012
View of the pillars of the future suspension bridge
A pillar under construction
The framework that will later support the roadway
Anchoring for the stay cables
The pillars grow upwards.
Construction progress March 26, 2013
Construction progress March 29, 2014
Detail of a pylon
Poya Bridge seen from the north
Web links
Individual evidence
- ^ State of Freiburg, Poyabrücke, Review , accessed on October 11, 2014
- ↑ Poya bridge on the website of the engineering association GVH ( Memento of the original from September 15, 2016 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.
- ↑ Federal Ordinance on Main Roads, amendment of August 11, 1999 (PDF)
- ↑ a b State of Freiburg, Message of April 25, 2006 from the State Council to the Grand Council , accessed on January 15, 2014
- ^ State of Freiburg, plan of the bridge , accessed on January 16, 2014
- ^ State of Freiburg, Poyabrücke , accessed on January 16, 2014
- ↑ Poya Bridge on the Implenia construction company website
- ^ State of Freiburg, Poyabrücke construction costs, media information from May 29, 2012 , accessed on January 15, 2014
- ^ State Chancellery Freiburg, vote from September 24, 2006 , accessed on January 15, 2014
