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Steinschlagschutz - Kaikoura SH1 - NS13 2019

Half Moon Bay, looking South: protected by a special hybrid attenuator

Steinschlagschutz - Kaikoura SH1 - NS13 2019

NS13 special attenuator under construction

Steinschlagschutz - Kaikoura SH1 - NS13 2019

NS13 attenuator under construction

Steinschlagschutz - Kaikoura SH1 - NS13 2019

Helicopters were required to lift in the materials

Steinschlagschutz - Kaikoura SH1 - NS13 2019

The ringnet was extended to the lateral anchors to provide extra protection and funnel the rocks into the centre fields.

Steinschlagschutz - Kaikoura SH1 - NS13 2019

Looking North - road and rail are protected from rockfall

Steinschlagschutz - Kaikoura SH1 - NS13 2019

Flex heads were used to connect the ropes to the self drilling anchors - note preserved tree.

Steinschlagschutz - Kaikoura SH1 - NS13 2019

Looking South - completed special attenuator with ringnet

Steinschlagschutz - Kaikoura SH1 - NS13 2019

Looking North - showing the transition of the impact zone and the attenuation zone

 

Systeme

TECCO® G65/3 Sonderlösungen

 

Systemlänge

56 m

 

Installationsjahr

2019

Ausgangslage

The Kaikoura M7.8 earthquake caused widespread damage to the road and rail corridor for approximately 20 km North and South of the Kaikoura township. Over forty major slips inundated the road and rail with more than 750'000 m³ of material from source zones up to 500 meters above sea level.  The highly fractured Grey Wacke meant frequent future rockfalls were expected. The rockfall frequency at NS13 created the requirement for a system that attenuated the rockfall energy to a manageable level with no maintenance and easy clearing. 

Massnahme

A 6 m RXE-2000 rockfall barrier was modified into a 56 m special attenuator. The attenuator consisted of a 12/3/350 ROCCO® ringnet in the impact zone (first 10 m) and a 7/3/350 ROCCO® tail (20 m). The lighter 7/3/350 ROCCO® tail was selected to enable the attenuated material to pass through into a catchment area at the toe of the slope for clearing/maintenance. The post spacing was between 8 m - 12 m depending on topography. TECCO® G65/3 was selected as the secondary mesh in the impact zone to ensure the smaller (less than 350 mm) high velocity rocks were also attenuated. GEOBRUGG SUPERCOATING and GEOBRUGG ULTRACOATING were selected due to the close proximity of the sea and Type III flex heads were required due to poor ground conditions.

Kunde

NCTIR / NZTA

Ausführende Firma

Ground Anchor Systems

Geschützte Objekte

Strasse, Eisenbahn

Korrosionsschutz

GEOBRUGG SUPERCOATING, GEOBRUGG ULTRACOATING

Weitere verbaute Anwendungen

Steinschlagschutz

Ansprechpartner

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / USA Regional Manager Northeast

E-Mail

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / USA Regional Manager California

E-Mail

John Kalejta
 

John Kalejta

Regional Manager Central US

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / USA Regional Manager Central US

E-Mail

Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Naturgefahren
Uferschutz/Wasserbau
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / USA Regional Manager Southeast

E-Mail

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Naturgefahren
Geobrugg North America, LLC,22 Centro Algodones,NM 87001 Algodones / USA , Civil Engineer General Manager Geobrugg North America

E-Mail

Tim Shevlin
 

Tim Shevlin

Sales Director

Naturgefahren
Geobrugg North America, LLC,Salem OR 97302 / USA Sales Director

E-Mail