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Rest and Be Thankful - A83 RabT

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

SL-150 type shallow landslide barrier installed in 2010

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

Another view of SL-150 type shallow landslide barrier installed in 2010

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

View from the road at the SL-150 type shallow landslide barrier installed in 2010

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

UX barrier installed above VX barrier in 2012 - protection against landslips

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

SL-150 shallow landslide barrier installed in 2012

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

Another view of the UX type debris flow barrier installed in 2010

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

UX type debris flow barrier installed above VX type debris flow barrier in 2012

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

Storm Desmond: On Saturday 5th December 2015 during storm Desmond a substantial landslip occurred at the A83 Rest and be Thankful

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

Storm Desmond: Thanks to the Geobrugg SL-150 barrier the A83, a major transport route in this area remained open

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

Storm Desmond: 150m³ struck a SL-150 barrier

Debris Flow & Shallow Landslide Protection - Rest and Be Thankful - A83 RabT 2012

Storm Desmond: A further 100m³ event struck the barrier overnight and over the next few days residual small movements led to a total of ~300m³ being held by the barrier

 

System length

9 m - 83 m

 

Year of installation

2012

Initial situation

The A83 at Rest and Be Thankful (RabT) in Argyll and Bute, Scotland, has been subject to a number of landslide or mudslide events that have caused major disruption to the traffic that regularly uses this key trunk road. The road was closed for several weeks in October 2007 when around 400 tonnes of material were deposited on the road when one such event occurred. Then in September 2009 the road was again closed for 48 hours after 1070 tonnes of material was deposited after a more significant event.

Description

BAM Ritchies, working closely with Geobrugg and Scotland Transerv, developed a solution of an eighty meters long, 4 m high shallow landslide barrier and 15.0 m wide VX ‘in-channel’ barrier nearby. These were installed in 2010. In 2012 a second phase of works saw the installation of a further 83.0 m of shallow landslide barrier at 3.5 m high. Another channel saw the instalation of both 25.0 m by 5.0 m UX debris flow barrier above 9.0 m by 2.0 m VX debris flow barrier.

Incident of Saturday 5th December, 2015
During storm Desmond that affected most parts of the UK a substantial landslide occurred at the A83 Rest and be Thankful. This is an area that has suffered numerous large landslide over the years and as such has numerous landslide and debris flow barriers have been installed. During the daytime on the 5th an event estimated at 150m3 struck a Geobrugg SL-150 barrier, the barrier successfully held the landslide and there was no need to close the road. A further 100m3 event struck the barrier overnight and over the next few days residual small movement led to a total of ~300 m³ being held by the barrier. The barrier held all of this material without failure or damage, brake rings were activated as designed and the posts and bases suffered no damage. Thanks to the Geobrugg SL-150 barrier the A83, a major transport route in this area remained open.

Country/Region

United Kingdom

Customer

Transport Scotland

Engineering

Geobrugg / BAM Ritchies

Contractor

BAM Ritchies / BAM Nuttall Ltd.

Protected object

Road

Corrosion protection

Galvanized, GEOBRUGG SUPERCOATING

Your local contact

Kevin Coyle
 

Kevin Coyle

Regional Manager Northeast

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

E-Mail

Saleh Feidi
 

Saleh Feidi

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,8921 Emperor Ave.,91775 San Gabriel, California / United States

E-Mail

John Kalejta
 

John Kalejta

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,KS 67226 Wichita / United States

E-Mail

Bob Lyne
 

Bob Lyne

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,8004 Windspray Drive,NC 27358 Summerfield / United States

E-Mail

Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

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

E-Mail

Tim Shevlin
 

Tim Shevlin

Natural Hazards
Geobrugg North America, LLC,OR 97302 Salem / United States

E-Mail