Tamina Bridge

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Coordinates: 46 ° 59 ′ 24 "  N , 9 ° 29 ′ 21"  E ; CH1903:  755971  /  206350

Tamina Bridge
Tamina Bridge
Tamina Bridge (2018)
use Road bridge
Crossing of Tamina
place Pfäfers , Valens
construction Concrete arch bridge
overall length 475 m
Clear width 260 m
Arrow height 35 m
height 200 m
building-costs CHF 36.7 million
start of building 2013
completion 2016
opening 22nd June 2017
planner Leonhardt, Andrä and Partner
location
Tamina Bridge (Canton of St. Gallen)
Tamina Bridge

The Tamina Bridge is a road bridge that went into operation in 2017 over the Tamina Gorge in the canton of St. Gallen . With a span of 260 meters, it is the largest arch bridge in Switzerland .

Project

The direct road connection from Bad Ragaz to Valens runs in the lower section over serpentines that lead through unstable terrain. In order to enable safe access, it was planned to connect Valens with the village of Pfäfers with a 400-meter-long bridge that spans the Tamina at a height of around 200 meters . The project - bridge including access roads - should cost CHF 56 million and make the renovation of the previous approach from Bad Ragaz to Valens unnecessary.

Resistance from the population arose in autumn 2010 against the project to build a bridge over the Tamina Gorge, particularly because of the high costs.

On 1 December 2010 the authorized Cantonal St. Gallen the project, and on 22 May 2012 was Councilor of the Canton of St. Gallen green light for construction.

construction

At the beginning of October 2012, the preparatory work for the construction of the access roads began, and the official groundbreaking took place on March 28, 2013 when the high wire artist Freddy Nock crossed the gorge on a 417 meter long rope .

First the fighters were built, the foundations at the ends of the arch. Then the arch was built in cantilever with 5 meter long sections. For this purpose, auxiliary pylons up to 105 meters high were built on both sides of the gorge , via which the two parts of the arches growing towards one another could be anchored back to rock anchors with rope cables. Among other things, a free-standing building crane with a hook height of around 113 meters and a radius of 75 meters was used.

The arch closed on March 28, 2015, exactly two years after the start of construction. The superstructure was then erected with the help of shoring.

The opening was celebrated from June 9th to 11th, the opening to traffic took place on June 22nd 2017.

construction

Since the two fighters are offset by 33 meters in height and the apex of the arch is not in the middle but closer to the Valensian side when the arch is about 35 meters, the arch bridge , which spans 259.36 meters, is asymmetrical. The arch clamped into the fighters has its largest dimensions on the Pfäfer side as a hollow cross-section with a construction height of 4 meters and a width of 9 meters. At the apex, with a solid cross-section, the dimensions decrease to 2 meters in height and 5 meters in width.

The prestressed superstructure is mounted on inclined panes arranged perpendicular to the arch axis and has a span of up to 53 meters in the area of ​​the arch and a box girder cross-section with a 9.5 meter wide roadway and 5 meter wide base plate at a standard height of 2.75 meters. The panes are connected to the arch or the superstructure with concrete joints .

The architect was the civil engineer Volkhard Angelmaier . The planners received the Supreme Award from the Institution of Structural Engineers for the bridge in 2018 .

  • The construction site of the Tamina Bridge in November 2013. View from Bofel to Suldis from the east

  • March 2015: The end of the arc is imminent. View from Suldis to Bofel from the southwest

  • October 2015: The roadway construction is driven forward from the center of the arch.

See also

literature

Web links

Commons : Tamina Bridge  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Largest arched bridge in Switzerland opened. In: Basler Zeitung. June 9, 2017. Retrieved September 9, 2019 .
  2. ↑ Jörg Krummenacher: Opening of the Tamina Bridge: Building a bridge in the valley of the wolves. In: Neue Zürcher Zeitung from June 22, 2017.
  3. ↑ Resistance to bridge is growing. In: Wiler Zeitung . October 26, 2010.
  4. ↑ Cantonal Council approves Tamina Bridge. In: SRF: Regional Journal Ostschweiz. December 1, 2010, accessed on September 9, 2019 (radio broadcast from 5:30 p.m.).
  5. ↑ Government gives the green light for the Tamina Bridge. In: Southeastern Switzerland . May 23, 2012.
  6. ↑ Preparatory work for the Tamina bridge Pfäfers – Valens. südostschweiz.ch, article from September 26, 2012.
  7. ↑ Unsecured on the rope over the Tamina Gorge. In: Tages-Anzeiger from March 28, 2013.
  8. ↑ Project website with information on the groundbreaking ceremony ( Memento from April 3, 2013 in the Internet Archive )
  9. ↑ Arch of the Tamina Bridge closed. Website of the Canton of St. Gallen, notification of March 28, 2015.
  10. ↑ Kurt Frischknecht: The longest arched bridge in Switzerland. Swiss Radio and Television , March 21, 2013, accessed on March 31, 2013 .
  11. ↑ Largest arched bridge in Switzerland opened. In: Der Bund , June 9, 2017.
  12. ↑ A drone flight over the longest arched bridge in Switzerland: The Tamina Bridge is so spectacular. In: Blick online from June 22, 2017.
  13. ↑ TEC21 31–32 / 2016, pp. 20–27.
  14. ↑ Volkhard Angelmaier: The Tamina Bridge in Switzerland, the home of great bridge construction engineers. P. 151.
  15. ↑ Supreme Award 2018