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낙석방호시스템 - Kaikōura SH1 - SR10 2022

Looking north - active TECCO 65/3 mesh and Canopy

낙석방호시스템 - Kaikōura SH1 - SR10 2022

Multi system approach: left shallow landslide barrier SL150, centre self cleaning canopy SCC500 and right rockfall attenuator ATT60

낙석방호시스템 - Kaikōura SH1 - SR10 2022

Southern canopy 75 % complete, mesh and posts getting hung in the North

낙석방호시스템 - Kaikōura SH1 - SR10 2022

Looking down slope the canopy

 

Systems

 

System length

104 m

 

설치 년도

2022

Situation

The Kaikōura M7.8 Earthquake caused widespread damage to the road and rail corridor 20 km North and South of the Kaikoura town ship. Over 40 major slips inundated the road and rail with over 750,000 m³ of material form source zones up to 500 m above sea level.  The highly fractured Grey Wacke meant frequent future rockfalls were expected. The rockfall frequency and near vertical slope with no shoulder at SR10 created the requirement for a system that protected the road without encroaching onto it, was quick to install and requires minimal future maintenance. The slope on average is  80-90 degrees with the project being the final and most complex of the NCTIR rockfall protection systems.

Description

A 104 m long self cleaning canopy (SCC-500) was installed at SR10. The self cleaning canopy was selected due to it's self cleaning ability and being able to withstand multiple rockfall impacts up to 500 kJ prior to requiring maintenance. The system has 13 posts ranging from 10-15 m in length with an upslope net length of between 12-26 m. The posts were anchored at 6 m high above the road with a 15 degree post inclination. The primary nets utilised high tensile (1770 MPa) ROCCO ring mesh with a secondary TECCO G65/3 for aperture control.  The structure has a support rope separation at post 6 to enable a split construction and a more efficient installation.  Type III flex heads were installed to transfer the off axis load back to the Gewi 32 anchor bar and a gap fill kit was installed to ensure  100 % system coverage. An active TECCO G65/3 system was installed in several areas below the canopy to mitigate the lower rockfall hazards. The system was installed using a combination of helicopters, cranes, Hiab's, scissor lifts and human power.

Customer

Contractor

Protected object

Road

부식방지

GEOBRUGG SUPERCOATING, GEOBRUGG ULTRACOATING

Your local contact

Roger Moor
   

Roger Moor

Country Manager Ost- und Zentralschweiz, Liechtenstein

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Geobrugg AG,Aachstrasse 11,8590 Romanshorn / 스위스 Country Manager Ost- und Zentralschweiz, Liechtenstein

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René Müller
   

René Müller

Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

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Geobrugg AG,Industriestrasse 21,5200 Brugg / 스위스 Country Manager Kantone AG BE BL BS FR GE JU NE SO VD VS

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Alexander Bittendorfer
   

Alexander Bittendorfer

Project Manager Inspection Services

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Geobrugg AG,Aachstrasse 11,8590 Romanshorn / 스위스 Project Manager Inspection Services

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Isacco Toffoletto
   

Isacco Toffoletto

Ticino Country Manager

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Geobrugg AG Ticino,Stabile Cometal, via Pizzante 7,6595 Riazzino / 스위스 Ticino Country Manager

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