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Slope Stability - Cwmavon Landslide 2018

Completed site image from the south of site.

Slope Stability - Cwmavon Landslide 2018

Slope after failure and cleaning

Slope Stability - Cwmavon Landslide 2018

Site after tree clearance

Slope Stability - Cwmavon Landslide 2018

Installation from top down of TECCO® GREEN

Slope Stability - Cwmavon Landslide 2018

Skid drill rig installing soil nails

Slope Stability - Cwmavon Landslide 2018

View of the full site including mobile elevated work platform (MEWP)

Slope Stability - Cwmavon Landslide 2018

Image from the north of site, showing the contouring of the mesh

Slope Stability - Cwmavon Landslide 2018

Natural vegetation regrowth through the TECCO® GREEN

Slope Stability - Cwmavon Landslide 2018

Boundary ropes and vegetation growth

 

Year of installation

2018

Initial situation

After prolonged periods of heavy rain and strong winds a large quantity of material was mobilised from the slope down onto the B4286. The road was closed for safety concerns whilst any remaining material was removed by hand. Traffic management was then installed and the road was re-opened as a single lane under traffic management.

Working closely with the local borough council, Geotechnical contractor Quantum Geotechnical and specialist rope access teams at iBEX a provisional stabilisation solution was put forward. This stabilisation utilised the excellent properties of TECCO® GREEN for both strength and greening capabilities. Quantum Geotechnical employed Remedy Geotechnics to ensure the provisional design was suitable, and all was agreed.

Geology

Brithdir Member - Sandstone. Sedimentary Bedrock formed approximately 308 to 310 million years ago in the Carboniferous Period.

These sedimentary rocks are fluvial in origin. They are detrital, ranging from course- to fine-grained and form beds and lenses of deposits reflecting the channels, Floodplains, and levees of a river.

Description

After harvesting of all trees on the full slope and specialist removal of tree stumps and roots on the slip plane, drilling works started from top down. In total 19 rolls of TECCO® GREEN, were installed with 150 soil nails.

Customer

Neath Port Talbot county borough council

Engineering

Remedy Geotechnics

Contractor

Quantum Geotechnical

Other participating companies

iBEX technical access

Protected object

Road, Residential area, Infrastructure

Corrosion protection

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Your local contact

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / United States Regional Manager Northeast

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Saleh Feidi
 

Saleh Feidi

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Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / United States Regional Manager California

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John Kalejta
 

John Kalejta

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Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / United States Regional Manager Central US

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Bob Lyne

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Hydraulic Engineering
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / United States Regional Manager Southeast

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

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

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Tim Shevlin
 

Tim Shevlin

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Geobrugg North America, LLC,Salem OR 97302 / United States Sales Director

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