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Ochrona przed obrywami skalnymi - Kaikoura Tunnel 16 2019

Looking north - 4 meters high GBE-1000A-R rockfall barrier

Ochrona przed obrywami skalnymi - Kaikoura Tunnel 16 2019

Looking north east - 4 meters high GBE-1000A-R rockfall barrier under construction

Ochrona przed obrywami skalnymi - Kaikoura Tunnel 16 2019

Looking north from behind barrier - 4 meters high GBE-1000A-R rockfall barrier. Note: no upslope anchors, road access maintained

Ochrona przed obrywami skalnymi - Kaikoura Tunnel 16 2019

Looking upslope - 4 meters high GBE-1000A-R rockfall barrier. Note: both rock fall and debris source

Ochrona przed obrywami skalnymi - Kaikoura Tunnel 16 2019

Looking south - 4 meters high GBE-1000A-R rockfall barrier

Ochrona przed obrywami skalnymi - Kaikoura Tunnel 16 2019

SH1 and the Coastal Pacific Rail are important lifelines and transport routes going north from Christchurch.

 

Dlugosc systemu od

116 m

 

Rok Instalacji / Montazu

2019

Sytuacja początkowa

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 with some debris loading created the requirement for a Geohazard Solution that could arrest the rockfall but be strong enough to withstand the pressure loading from debris accumulation. The barrier was located on the old road, and access behind the barrier had to be maintained.

Opis zastosowanego rozwiazania

A 116 meters long, 4 meters high GBE-1000A-R was the selected system. The fixed post system has no upslope anchor ropes enabling easy access behind for clearance and maintenance. The net was upgraded to a SPIDER® S4-130 to withstand the pressure loading and increase the durability for frequent rockfall impacts. TECCO® G65/3 was selected as the secondary mesh to avoid puncturing failures from smaller high-velocity impacts.

Due to the highly fractured rock mass from the cut and cover tunnel construction, self-drilling anchors were required. Geobrugg Type III flexheads transfer the load to the bar anchors. The alignment had two downslope anchors due to the curved alignment and two support rope separations to allow maintenance on individual sections. SUPERCOATING and ULTRACOATING were used due to the proximity to the sea.

Inwestor

NCTIR and NZTA

Wykonawca

Rock Control

Chroniony Objekt

Road

Ochrona przeciwerozyjna

GEOBRUGG SUPERCOATING, GEOBRUGG ULTRACOATING

Osoba kontaktowa na miejscu

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / USA Regional Manager Northeast

Formularz kontaktowy

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / USA Regional Manager California

Formularz kontaktowy

John Kalejta
 

John Kalejta

Regional Manager Central US

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / USA Regional Manager Central US

Formularz kontaktowy

Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Zagrożeniami naturalnymi
Nżynieria hydrauliczna
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / USA Regional Manager Southeast

Formularz kontaktowy

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

Zagrożeniami naturalnymi
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

Formularz kontaktowy

Tim Shevlin
 

Tim Shevlin

Sales Director

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

Formularz kontaktowy