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Kaikoura Coastal Pacific Rail (SH1)

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SH1) 2019

Looking West - VX080-H4 debris flow barrier with 12/3/350 ROCCO® ring net tail - note proximity to rail

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SH1) 2019

Looking North - VX080-H4 debris flow barrier with 12/3/350 ROCCO® ringnet tail - note proximity to rail

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SH1) 2019

VX080-H4 - debris accumulation as per design in the catchment ditch after moderate rain

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SH1) 2019

Debris flow barrier to ROCCO® tail connection

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SH1) 2019

Drape Support ropes to assist lower engery material to pass through

 

Systems

VX VX080-H4 Special Solutions

 

Year of installation

2019

Initial situation

The 2016 Kaikoura M7.8 earthquake caused widespread damage to the road and rail corridor some 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 m above sea level. The highly fractured Grey Wacke means frequent future rockfalls and debris loads are to be expected. The high rockfall and debris load frequency created the requirement for a Geohazard Solution that attenuated the energy to a manageable level and guided the material down to a catchment area. Due to the proximity of the Coastal Pacific rail line space is limited.

Description

A VX080-H4  debris flow barrier was combined with a 12/3/350 ROCCO ring net tail. This system enables the rockfall and debris energy to be attenuated and guided down to a catchment area at the toe of the slope for easier clearing and reduced maintenance. Additional support ropes were also installed across the channel under the ROCCO® tail where it rested on the slope to enable the lower energy material to pass under and not get caught up. Short 0.5 m tethers were installed in the lower part of the tail to stop it from kicking out towards the rail in the larger energy events. TECCO® G65/3 was used as a secondary mesh as a robust solution was required due to the high frequency of the smaller high-velocity rocks.
Shortly after completion, the system demonstrated itself to be working well.

Country/Region

New Zealand

Customer

KiwiRail

Contractor

Geovert

Protected object

Railway

Corrosion protection

GEOBRUGG SUPERCOATING

Your local contact

René Müller
   

René Müller

Country Manager Western Switzerland

Natural Hazards
Hydraulic Engineering
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Geobrugg AG,Industriestrasse 21,5200 Brugg / Switzerland Country Manager Western Switzerland

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Olivia Sartorius
   

Olivia Sartorius

Project Manager Sales Eastern and Central Switzerland

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Geobrugg AG Project Manager Sales Eastern and Central Switzerland

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Matthias Denk, Msc. Env. Eng.
 

Matthias Denk

Natural Hazards
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Geobrugg AG,Aachstrasse 11,8590 Romanshorn / Switzerland , Msc. Env. Eng.

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Isacco Toffoletto
   

Isacco Toffoletto

Country Manager Southern Switzerland

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Geobrugg AG Ticino,Via Brusada 5,6933 Muzzano / Switzerland Country Manager Southern Switzerland

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