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Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

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

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

NS13 special attenuator under construction

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

NS13 attenuator under construction

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

Helicopters were required to lift in the materials

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

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

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

Looking North - road and rail are protected from rockfall

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

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

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

Looking South - completed special attenuator with ringnet

Protección contra caídas de rocas - Kaikoura SH1 - NS13 2019

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

 

Sistemas

TECCO® G65/3 Soluciones especiales

 

Longitud del sistema

56 m

 

Año de instalación

2019

Situación inicial

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. 

Descripción

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.

Cliente

NCTIR / NZTA

Subcontratista

Ground Anchor Systems

Objeto protegido

Carretera, Ferrocarril

Protección contra la corrosión

GEOBRUGG SUPERCOATING, GEOBRUGG ULTRACOATING

Otras aplicaciones instaladas

Protección contra caídas de rocas

Su contacto local

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Protección contra riesgos naturales
Ingeniería hidráulica
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / EE. UU. Regional Manager Northeast

Correo electrónico

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Protección contra riesgos naturales
Ingeniería hidráulica
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / EE. UU. Regional Manager California

Correo electrónico

John Kalejta
 

John Kalejta

Regional Manager Central US

Protección contra riesgos naturales
Ingeniería hidráulica
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / EE. UU. Regional Manager Central US

Correo electrónico

Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Protección contra riesgos naturales
Ingeniería hidráulica
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / EE. UU. Regional Manager Southeast

Correo electrónico

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Protección contra riesgos naturales
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

Correo electrónico

Tim Shevlin
 

Tim Shevlin

Sales Director

Protección contra riesgos naturales
Geobrugg North America, LLC,Salem OR 97302 / EE. UU. Sales Director

Correo electrónico