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Hampton Forest Slash Barrier

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

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토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

Looking Upstream - Installing the support ropes

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

Looking downstream at the completed structure which is hardly visible

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

Mid construction

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

The contractor Rock Control installing the ring mesh

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

Looking downstream at the completed structure

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

The slash barrier was first filled in March 2022 and successfully contained a combitantion of slash and landslide material. The system was then cleaned out and filled again in January 2023

토석류 및 산사태 방호 시스템 - Hampton Forest Slash Barrier 2021

The system was cleaned out and filled again in January 2023. The barrier was cleared again in February 2023 and 2 - 3 days later was filled again. The barrier was over topped and remains intact.

 

설치 년도

2021

Situation

The best management of slash material is at the source. However, even with the best practices, unforeseen extreme weather events can mobilise tree waste and debris into river channels which can cause significant damage to downstream assets. Historically in New Zealand forestry slash-catching barriers are built in-house with various combinations of rope, railway irons and recycled steel members which are then secured back to the bank with deadman anchors.  These structures are effective at stopping small volumes of slash material but risk catastrophic failure from overload subsequently releasing a large volume of material downstream at once. Rayonier Matariki Forests wanted to be proactive and set a new protection benchmark by installing a Geobrugg 1:1 tested and engineered solution, common in Europe but a first in NZ. Although designed for an extreme weather event, the intention is that the barrier is never significantly impacted through slash management at the source and then it can then be dismantled and used at another similar location.

Description

A VX140-H4 was installed in the river channel near the boundary of the 800ha catchment. The barrier height and location were chosen to utilise the large upstream catchment area for log and debris accumulation. The location also has good access for future maintenance/clearing if required. The VX140-H4 System (140kN/m²) was selected to provide sufficient capacity for both the static and dynamic loads of debris and driftwood (slashing) events. Wire rope anchors were used to transfer the loads back into the ground and provide design redundancy should some bank erosion occur. Edge protection was also installed on the top rope to protect the structure in the event of overtopping.

Contractor

Rock Control

Protected object

Other

Your local contact

René Müller
   

René Müller

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

자연 재해
수리학
광산 / 터널
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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Olivia Sartorius
   

Olivia Sartorius

자연 재해
수리학
광산 / 터널
Geobrugg AG

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Alexander Bittendorfer
   

Alexander Bittendorfer

Project Manager Inspection Services

자연 재해
Geobrugg AG,Trucks via road 14 or 13 only!, Aachstrasse 11,8590 Romanshorn / 스위스 Project Manager Inspection Services

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Isacco Toffoletto
   

Isacco Toffoletto

자연 재해
수리학
광산 / 터널
Geobrugg AG Ticino,Via Brusada 5,6933 Muzzano / 스위스

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