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Mühlehorn, Highway A3, Glarus Nord

Slope Stability - Mühlehorn, Highway A3, Glarus Nord 2015

Protected roadway and railway infrastructure

Slope Stability - Mühlehorn, Highway A3, Glarus Nord 2015

Drilling above the highway

Slope Stability - Mühlehorn, Highway A3, Glarus Nord 2015

Rockface after completion of the TECCO® installation

Slope Stability - Mühlehorn, Highway A3, Glarus Nord 2015

RXE type barriers and TECCO® System supporting each other

Slope Stability - Mühlehorn, Highway A3, Glarus Nord 2015

Location: Walensee, Switzerland Federal Office of Topography National Map 1:50'000

 
 

Year of installation

2015

Initial situation

The highway A3 was opened in 1964 and passed as a 2-lane road the topographic bottleneck of the Walensee, one of the main threats on the way from the Swiss plains to the mountainous regions and ski resorts. In 1986 one of the most frequented tunnels was extended to four lanes. Due to a significant exposition to rockfall and rockslides, from the beginning of its existence the route had to be protected against natural hazards.

With increasing traffic and widening the formerly narrow path to a highway, also protection measures had to be adapted and extended.

In 2012 the Swiss Federal Roads Office FEDRO decided to realize several urgent maintenance works being unavoidable in order to keep the road open. In parallel risks and protection needs were re-evaluated and a general project to ensure safety of the highway was initiated. After the planning phase from 2013 to 2015 the first protection systems of the new generation were installed.

Hot-spots along the passage have been the various tunnel entrances, opening to steep slopes or even sheer rock faces.

Official project name at the FEDRO, Federal Office for Roads: Glarus Nord

Overall costs of the protection project (estimated in 2014): 11 Million Swiss Francs

Description

This description shows the part stabilized with TECCO® System. A parallel project, Kerenzerberg HighKerenzerberg Highway A3 is showing rockfall barriers type RXE-8000 (also partly visible on the pictures).

Unstable slope and rock sections between and behind the fence lines were stabilized using TECCO® G65/4. Geology and topography required using the unique performance of TECCO® mesh as well as the strength of 4 mm high-tensile strength steel wire to bear the shearing forces and puncturing loads of stabilized rock masses.

Customer

FEDRO Federal Roads Office, Switzerland

Contractor

CRESTAGEO, Chur, Switzerland

Protected object

Road, Railway

Corrosion protection

GEOBRUGG SUPERCOATING

Engineering

Project Partners Ltd Consulting Engineers, Grancia-Lugano, Switzerland

Other installed applications

Rockfall Protection

Your local contact

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / United States Regional Manager Northeast

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Saleh Feidi
 

Saleh Feidi

Regional Manager California

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / United States Regional Manager California

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John Kalejta
 

John Kalejta

Regional Manager Central US

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / United States Regional Manager Central US

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Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / United States Regional Manager Southeast

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Natural Hazards
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

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Tim Shevlin
 

Tim Shevlin

Sales Director

Natural Hazards
Geobrugg North America, LLC,Salem OR 97302 / United States Sales Director

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