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Protection contre les chutes de pierres - Kaikōura SH1 - SR8 and 9 2021

ATT looking north side protecting the road

Protection contre les chutes de pierres - Kaikōura SH1 - SR8 and 9 2021

ATT 60 drops stones to the ground in a controlled manner

Protection contre les chutes de pierres - Kaikōura SH1 - SR8 and 9 2021

Top view from the barrier

Protection contre les chutes de pierres - Kaikōura SH1 - SR8 and 9 2021

ATT 60 looking south onto the sea

 

Systèmes

 

Longueur du système

110 m

 

Année d’installation

2021

Situation de départ

The Kaikōura M7.8 Earthquake caused widespread damage to the road and rail corridor 20 km North and South of the Kaikoura township. Over 40 major slips inundated the road and rail with over 750,000 m³ of material from source zones up to 500 metres above sea level. The highly fractured Grey Wacke meant frequent future rockfalls were expected. The rockfall frequency and wide run-out area at SR8 and 9 created the requirement for a system that attenuated the rockfall energy to a manageable level, was quick to install and required minimal future maintenance. The slope, on average, is approximately 50 degrees, but in some parts, it is nearly vertical.

Description

A 110 metres wide rockfall attenuator (ATT - 60) with a 35 to 40 metres tail which enables the attenuated material to pass down through to the lower section for clearing if required. The 65 mm aperture is small enough that no secondary mesh is required, and the ULTRACOATING ensures design life in the coastal environment. The attenuator system utilises a 3 metres high hinged post with a 16 metres spacing and a support rope separation halfway.  A double-top rope was installed for increased safety in design, and Type III flex heads were installed to transfer the load to the Gewi 32 anchor bar. Overall, the attenuators create a quick and cost-effective solution.

Pays / Région

Nouvelle-Zélande

Client

Entrepreneur

Objet protégé

Route/Rue

Protection anticorrosion

GEOBRUGG ULTRACOATING

Votre contact local

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
Système de surveillance d'ouvrage à distance
Geobrugg AG,Industriestrasse 21,5200 Brugg / Suisse Country Manager Cantons AG BE BL BS FR GE JU NE SO VD VS

E-mail

Olivia Sartorius
   

Olivia Sartorius

Project Manager Sales Eastern and Central Switzerland

Risques naturels
Ingénierie Hydraulique
Exploitation minière / Tunnel
Système de surveillance d'ouvrage à distance
Geobrugg AG Project Manager Sales Eastern and Central Switzerland

E-mail

Matthias Denk, Msc. Env. Eng.
 

Matthias Denk

Risques naturels
Ingénierie Hydraulique
Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Suisse , Msc. Env. Eng.

E-mail

Isacco Toffoletto
   

Isacco Toffoletto

Country Manager Southern Switzerland

Risques naturels
Ingénierie Hydraulique
Exploitation minière / Tunnel
Système de surveillance d'ouvrage à distance
Geobrugg AG Ticino,Via Brusada 5,6933 Muzzano / Suisse Country Manager Southern Switzerland

E-mail