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Kaikoura Coastal Pacific Rail (SK16)

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SK16) 2019

Looking West - VX080-H2 debris flow barrier with 16/3/300 ROCCO ringnet tail. Note proximity to rail and road.

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SK16) 2019

Looking South - VX080-H2 debris flow barrier with 16/3/300 ROCCO® ringnet tail.

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SK16) 2019

Looking upslope - VX080-H2 debris flow barrier with 16/3/300 ROCCO ringnet tail. Note abrasion protection on the top ropes.

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SK16) 2019

Looking upslope - VX080-H2 debris flow barrier with 16/3/300 ROCCO® ringnet tail under construction.

Debris Flow & Shallow Landslide Protection - Kaikoura Coastal Pacific Rail (SK16) 2019

Looking North - SH1 and the Coastal Pacific Rail is an important lifeline and transport route going North from Christchurch.

 

Systems

VX TECCO® G65/3 Special Solutions

 

System length

2 m - 10 m

 

Year of installation

2019

Initial situation

The Kaikoura M7.8 Earthquake caused widespread damage to the road and rail corridor for 20 km North and South of the Kaikoura township. Over 40 major slips inundated the road and rail with more than 750'000 m³ of material from source zones up to 500 m above sea level. The highly fractured Grey Wacke meant frequent future rockfalls and debris loads were expected. The high rockfall and debris load frequency created the requirement for a Geohazard Solution that attenuated the energy to a manageable level and then guided the material down to a catchment area. Space was limited due to the proximity of the Coastal Pacific rail line. The SK16 site is a narrow, incised catchment that extends about 150 m above road/rail level. The slope angle is about 50-55 degrees.

Description

A 10 meters wide VX080-H2 debris flow barrier was modified to include a 12 meters 16/3/300 ROCCO ring net tail. This system enabled 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 to minimise deflection onto the railway. The installation required abrasion protection on the top ropes due to the potential of it being overtopped in above design large events.

TECCO® G65/3 was used as a secondary mesh as a robust solution was required to avoid puncturing failures from the high frequency of smaller high-velocity rocks.

Customer

KiwiRail

Contractor

Rock Control

Protected object

Railway

Corrosion protection

GEOBRUGG SUPERCOATING

Your local contact

Kevin Coyle
 

Kevin Coyle

Regional Manager Northeast

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

E-Mail

Saleh Feidi
 

Saleh Feidi

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

E-Mail

John Kalejta
 

John Kalejta

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,KS 67226 Wichita / United States

E-Mail

Bob Lyne
 

Bob Lyne

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

E-Mail

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

E-Mail

Tim Shevlin
 

Tim Shevlin

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

E-Mail