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| Titel |
Landslide barriers at A83 Rest and be Thankful in Scotland and their first event 2015 |
| VerfasserIn |
Corinna Wendeler, Axel Volkwein, Roberto Luis |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250123687
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| Publikation (Nr.) |
 EGU/EGU2016-2982.pdf |
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| Zusammenfassung |
| Rest and be Thankful is a part of the road A83 in northern Scotland and has a long
history of landslides. In 2007, the site was closed for several weeks after a shallow
landslide. A kind of mudslides deposited 400 tons of material on the road. In early
September 2009, a further event resulted in 1070 tons of material slipping onto
the road at the same place, forcing its closure for 48 hours. No one was hurt in
either incident, but these slides pose a serious threat to the country’s main rural
routes (Gibson, 2010). The site has then been the subject of study and is included
in the recent Scottish Roads Network Landslides Study produced by Transport
Scotland. The study identified the A83 at Rest and be Thankful as one of the most risk
sites for debris flow and/or landslides – a fact confirmed by the events that have
occurred.
The development of flexible debris flow and landslide barriers is more recent
but has reached a point where they may be designed, specified and installed with
confidence. Indeed, installations are now quite common in European alpine areas,
California, Japan and Korea in particular. The standard system SL-150 of company
Geobrugg with a height of 3.5 m was installed in 2011, the design parameters
as well as the calculation of the structural system were checked by WSL to fulfil
newest research results out of a 3 year research project (Bugnion et al, 2011 and
2012).
In 2015, the first event happened to the barrier SL-150. Storm Desmond released on
Saturday 5th December during daytime a first slide of around 150 m3 into the barrier,
afterwards around night time a second slide with 100 m3 impacted the same barrier and
some smaller slides followed. In total 300 m3 of material were captured successfully by that
SL-150 barrier and the major transport route in this area remained open while storm
Desmond. No failure at the barrier happened, only the so called energy absorbers got
activated. A big success of the past research project in which originally the loading approach
and the system itself were developed. The maintenance work at the barrier itself will now be
to clean up, and to re-install the energy absorbers. Then the barrier is ready again for new
events.
References
Winter M G, Macgregor F, Shack-man L (2008) Scottish Road Network Landslides Study
Edinburgh.
Gibson D (2010) Landslide Victory, the UK’s first flexible debris flow barrier being
installed at the landslide prone Rest and be Thankful site in Scotland, Ground Engineering
April 2010.
Bugnion L, McArdell B, Bartelt P, Wendeler C (2011) Measurements of Hillslope Debris
Flow Impact Pressure on Obstacles. Landslides, 9, 179-187.
Bugnion L, Wendeler C (2010) Shallow landslide full-scale experiments in combination
with testing of flexible barrier. Debris Flow 2010 Milano, Italy.
Bugnion L, Boetticher A v, Wendeler C (2012) Large scale field Testing of hill slope
debris flows resulting in The Design of Flexible Protection Barriers, Abstract of 12th
Interprevent Conference 2012 Grenoble, France. |
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