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Stabilisation des pentes - Schänis, State Road 17 2016

Installation using a mobile drill rig

Stabilisation des pentes - Schänis, State Road 17 2016

Installing a section towards south-east, before placing the spike plates

Stabilisation des pentes - Schänis, State Road 17 2016

Protected object: Quiet during the day, very congested during rush-hour

Stabilisation des pentes - Schänis, State Road 17 2016

Risk of toppling rocks is a thing of the past: SPIDER® ensures safe traffic (view of the north-eastern section)

Stabilisation des pentes - Schänis, State Road 17 2016

Location: Linth Plain, Switzerland Federal Office of Topography, Bern, Switzerland National Map 1:50'000

 
 

Année d’installation

2016

Situation de départ

The area was formed by glaciers. With climate change, the rock underneath, molasse conglomerate rock, has become more unstable. During the past few years sections of rock, some with volumes of around 1 m³, became dangerously loose and were in danger of eminent fall onto the road, the building below and the neighboring pastures.

The Swiss State Agency for Forest and Natural Hazards immediately alerted the regional road inspectorate and political community to the potential risk.

Géologie

Instable blocks of molasse conglomerate.

Description

As a short term emergency measure Geobrugg worked with the regional road administration and a local contractor to stabilize the most critical rock sections with SPIDER® S3-130.

As a long-term solution that ensures safe driving conditions for daily commuting, an anchored system was installed. Along the deep chasms all along the molasse bar, three levels of anchors were drilled. The higher and lower levels were drilled to a length of 4 m while the anchors of the middle rows were drilled to a length of 7 m. These anchors were drilled to a grid that measures 2.15 m x 2.15 m.

The whole project from planning to final acceptance took only six weeks.

Client

State Department for Underground Construction, Canton St.Gallen, Switzerland

Entrepreneur

Oberholzer Inc., Neuhaus, Switzerland

Objet protégé

Route/Rue, Bâtiment

Protection anticorrosion

GEOBRUGG SUPERCOATING

Ingénierie

Geobrugg AG, Geohazard Solution

Votre contact local

Roger Moor
   

Roger Moor

Country Manager Ost- und Zentralschweiz, Liechtenstein

Risques naturels
Ingénierie Hydraulique
Exploitation minière / Tunnel
Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Suisse Country Manager Ost- und Zentralschweiz, Liechtenstein

E-mail

René Müller
   

René Müller

Country Manager Cantons AG BE BL BS FR GE JU NE SO VD VS

Risques naturels
Ingénierie Hydraulique
Exploitation minière / Tunnel
Geobrugg AG,Industriestrasse 21,5200 Brugg / Suisse Country Manager Cantons AG BE BL BS FR GE JU NE SO VD VS

E-mail

Alexander Bittendorfer
   

Alexander Bittendorfer

Project Manager Inspection Services

Risques naturels
Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Suisse Project Manager Inspection Services

E-mail

Isacco Toffoletto
   

Isacco Toffoletto

Ticino Country Manager

Risques naturels
Ingénierie Hydraulique
Exploitation minière / Tunnel
Geobrugg AG Ticino,Stabile Cometal, via Pizzante 7,6595 Riazzino / Suisse Ticino Country Manager

E-mail