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Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Filled barrier after the impact - view from downstream

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Satellite image of the storm that moved across the northern Swiss Alps on October 10 (source: SF Meteo website)

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Filled barrier after the impact

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Filled barrier after the impact

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Partially engaged UX-barrier - ready for more

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Event mapping

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Erosion and slope instability

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Staking

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Drilling with a specially equipped excavator

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Installing flexheads

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Foundation with installed flexheads

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Ring net ready to be placed

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Connecting the ring net to the ropes

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Final assembly of the components

Protection contre les glissements de terrain et les laves torrentielles - Milibach Torrent, Hasliberg, Canton of Bern 2011

Anchor test

 

Systèmes

 

Longueur du système

500 m - 7 m

 

Année d’installation

2011

Situation de départ

In August 2005, a storm in the Weiler Reuti and in Meiringen had caused serious debris coverage and severe damage. To protect the two settlements, a cascade comprised of 13 flexible debris flow barriers was installed to retain a cumulative volume of up to 10,000 m³ was installed.

On October 10, 2011, heavy rainfall triggered a shallow landslide containing a total of 2,000 m³ of schist in the drainage area of the Milibach river. Approximately 80 mm of rain had fallen onto a 70 cm layer of existing snow in 12 hours. The Swiss Federal Office for Environment (FOEN) categorized these heavy rainfalls as the 100-year event.

Description

This multilevel debris flow barrier system successfully retained an estimate 2,000 m³ of debris from the October 2011 100-year event before the slide had any opportunity to gain momentum and cause significant damage, as had happened in 2005. The event filled barrier no. 2 completely and barrier no. 5 partially. Barrier 1, which was situated above where the shallow landslide was triggered, remained unaffected, while barriers 3 and 4 were not filled as they have a higher basal opening.

Stopping the 2,000 m³ of debris helped prevent further erosion along the unstable banks of the Milibach River and dissipated an event that could have caused damage to the settlements further downstream. After an in-depth investigation during an on-site inspection, the customer decided to leave barrier no. 2 filled to protect the riverbanks. The debris held by barrier no. 5 is also being left and should be carried away over time as the water drains naturally.

Client

.

Protection anticorrosion

GEOBRUGG SUPERCOATING

Autres applications installées

Protection contre les glissements de terrain et les laves torrentielles

Votre contact local

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Risques naturels
Ingénierie Hydraulique
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / Etats-Unis Regional Manager Northeast

E-mail

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Risques naturels
Ingénierie Hydraulique
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / Etats-Unis Regional Manager California

E-mail

John Kalejta
 

John Kalejta

Regional Manager Central US

Risques naturels
Ingénierie Hydraulique
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / Etats-Unis Regional Manager Central US

E-mail

Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Risques naturels
Ingénierie Hydraulique
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / Etats-Unis Regional Manager Southeast

E-mail

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Risques naturels
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

E-mail

Tim Shevlin
 

Tim Shevlin

Sales Director

Risques naturels
Geobrugg North America, LLC,Salem OR 97302 / Etats-Unis Sales Director

E-mail