Pipe bridge Großer Gröben
Coordinates: 47 ° 18 ′ 53 ″ N , 10 ° 33 ′ 52 ″ E
| Pipe bridge Großer Gröben | ||
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| use | Bschlaber Strasse (L266) | |
| Crossing of | Great coarse | |
| place | approx. 2 km south of Bschlabs | |
| construction | Frame bridge | |
| overall length | 80 m | |
| height | 40 m | |
| completion | 1988/89 | |
| planner | Regional Building Directorate Tyrol, architect Karl Sporschill | |
| location | ||
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| Above sea level | 1200 m above sea level A. | |
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Pipe bridge framed by tunnels on both sides |
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The pipe bridge Großer Gröben is a road bridge in the Austrian state of Tyrol .
Motivation to build bridges
The purpose of the bridge construction was a winter-safe connection from the Lech Valley to the Bschlab Valley on the right-hand side to the towns of Bschlabs and Pfafflar . Due to avalanche barriers, the further connection between these places via the Hahntennjoch and the neighboring Imst is permanently interrupted in winter. The previously existing road runs at this point in a long arc into the deep cut of the Gröbenbach, which is buried almost every winter by snow avalanches .
Climatic boundary conditions
The dust avalanches that leave the 2468 m high arrowhead in an approx. 1200 m long avalanche line represent a great danger to traffic. As the bridge is still within the range of the dust avalanches despite its height of 40 m above ground, it was built without opening a window .
Building
In the valley there is a 101 m long poured-in tube, which merges into the 80 m long curved pipe bridge with no border visible from the inside and is then closed by another 163 m long tunnel. Since the pipe of the bridge is closed on all sides to protect against avalanches, it acts like a continuous tunnel tube for road users. He does not know that he is passing a concrete pipe bridge between two tunnels. The outside of the bridge is accessible on foot from both ends of the tunnel.
Construction work
The construction was carried out in 20 sections without scaffolding and with free prestressing. The implementation in the high alpine environment was associated with initial difficulties.
Further use
The technical monitoring of the bridge is carried out by a sensor system operated by the Institute for Avalanche and Torrent Research, Federal Forest Research Institute. At the same time, the data obtained are used for the scientific analysis of avalanches. In the underside of the flat deck there is a rail system in which a maintenance basket is suspended.
Web links
gallery
Sensor technology on the top of the pipe bridge
Underside of the bridge with guide rails for the maintenance basket
Individual evidence
- ↑ Pipe bridge at Großer Gröben . In: architektur im netz , nextroom.at.
- ↑ Pipe bridge at Großer Gröben. In: arch INFORM .
- ↑ a b Gröben Load Plates Description of the avalanche situation, sensors and evaluation of the avalanche measurements
- ^ Karl Gotsch, Bridge Lexicon
- ^ Otto Kapfinger: Building in Tirol since 1980. A guide to 260 buildings worth seeing. Architekturforum Tirol, Verlag Anton Pustet, Salzburg 2002. ISBN 3-7025-0436-2
- ↑ aut - rainer köberl: the invisible bridge
- ^ Austrian Institute for Avalanche and Torrent Research ( AIATR)
- ↑ Avalanche Test Sites and Research Equipment in Europe, An Updated Overview by Satsie (PDF, 18 MB)
- ↑ Dynamic measurements on dust avalanches , Dr. Lambert Rammer, Institute for Avalanche Research, Ibk (PDF, 1.2 MB)