Switzerland
Switzerland

myGeobrugg

Anchor reinforcement motorway tunnel

Impact Protection - Anchor reinforcement motorway tunnel 2008

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Impact Protection - Anchor reinforcement motorway tunnel 2008

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Impact Protection - Anchor reinforcement motorway tunnel 2008

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Year of installation

2008

Initial situation

-

Description

Some of the tie bars in the vicinity of a gravity wall have corrosion problems. These corrosion problems can result in tie bars suddenly fracturing – brittle fracture – and flying into the clearance gage profi le of the adjacent freeway lane. The aim of an elaboration was to brake the tie bars at a relatively short distance, preventing them from penetrating the lane space. Geobrugg’s answer comprises a high-tensile steel wire mesh stretched in front of the 64 tie bar heads and provided with four braking rods, two at the top and two at the bottom. The ingenious interaction of this mesh and the specially designed braking system permitted a reduction in kinetic energy of up to 30 kJ for a defl ection of only 40 cm. Use is made here of the specifi c material properties of the utilized steel (very high dynamic- plastic deformation capability).

Customer

Federal Road Office Astra

Engineering

Geobrugg AG

Protected object

Other

Your local contact

Ivo Naef
 

Ivo Naef

Sales Manager Safety Solutions

Impact Protection
Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Switzerland Sales Manager Safety Solutions

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