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Kaikoura State Highway 1 (SR1-2)

Proteção contra desprendimentos - Kaikoura State Highway 1 (SR1-2) 2019

Looking north - 3 m high GBE-500A rockfall barrier

Proteção contra desprendimentos - Kaikoura State Highway 1 (SR1-2) 2019

Looking upslope - 50 meters long and 3 meters high GBE-500A rockfall barrier

Proteção contra desprendimentos - Kaikoura State Highway 1 (SR1-2) 2019

Looking upslope -support rope separation

Proteção contra desprendimentos - Kaikoura State Highway 1 (SR1-2) 2019

Looking north - 3 m high GBE-500A rockfall barrier . Note: downslope anchor for upslope change in direction

Proteção contra desprendimentos - Kaikoura State Highway 1 (SR1-2) 2019

Looking south - 3 m high GBE-500A rockfall barrier

Proteção contra desprendimentos - Kaikoura State Highway 1 (SR1-2) 2019

Looking North - 3 m high GBE-500A rockfall barrier installed above shotcrete and precast walls. SH1 and the Coastal Pacific rail is an important lifeline and transport route going North from Christchurch.

 

Sistemas

 

Comprimento do sistema

100 m

 

Ano de instalação

2019

Situação 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 means frequent future rockfalls and debris loads. The high rockfall frequency created the requirement for a geohazard solution at Site 1-2.

Descrição

The original design and installation was a 50 meters long 3 meters high GBE-500A barrier. After installation, the decision was made to install an additional 50 meters of barrier to protect the highway further. The system was easily extended by upgrading the northernmost post to a support rope separation with no material wastage.


The GBA-500A is a hinged post system. The barrier has upslope anchors, which reduce the post foundation forces and therefore minimise impact to the precast concrete wall and shotcrete retaining walls below. The rockfall barrier used a 10 meters post spacing, had two downslope anchors due to a curved alinement and as previously mentioned was split into two sections with a support rope separation. Due to the highly fractured rock mass, self-drilling anchors were required. Geobrugg type II flex heads transfer the loads to the bar anchors. The mesh was ultra-coated due to its proximity to the sea.

Promotor

NCTIR and NZTA

Contratante

Rock Control

Objecto protegido

Estrada

Proteção contra a corrosão

GEOBRUGG ULTRACOATING

O seu contacto local

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Riscos naturais
Engenharia Hidráulica
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / Estados Unidos Regional Manager Northeast

E-mail

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Riscos naturais
Engenharia Hidráulica
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / Estados Unidos Regional Manager California

E-mail

John Kalejta
 

John Kalejta

Regional Manager Central US

Riscos naturais
Engenharia Hidráulica
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / Estados Unidos Regional Manager Central US

E-mail

Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Riscos naturais
Engenharia Hidráulica
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / Estados Unidos Regional Manager Southeast

E-mail

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Riscos naturais
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

E-mail

Tim Shevlin
 

Tim Shevlin

Sales Director

Riscos naturais
Geobrugg North America, LLC,Salem OR 97302 / Estados Unidos Sales Director

E-mail