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Construction of this 67-metre-high reinforced soil slope (RSS) was completed in December 2006. After seven years in-service, a tension crack was observed at the top of the slope.
In March 2015 this RSS structure catastrophically collapsed. The structure collapsed in a compound failure mode; as the failure plane passed beneath, partially behind, and partially through the reinforced soil mass. The RSS collapse occurred after 8.3 years in-service as the shear strength along the shale-claystone foundation interface decreased and approached the fully softened strength.
This webinar will cover the forensic investigation performed, the causes of the failure and lessons learned.
This is a joint event with the International Geosynthetic Society (IGS) UK Chapter.
Dr Jim Collin founded The Collin Group in the USA over 25 years ago. He has served as a forensic expert on geotechnical failures including column supported embankments, aggregate columns, mechanically stabilized earth, soil nailing, earth retaining structures, building settlement, and reinforced soil slopes.
Ryan R. Berg was a pioneer in the use of geogrid soil reinforcements in retaining walls and steepened slopes throughout North America and is an internationally recognised expert in the design and construction of reinforced soil structures.
Mr Berg is a co-author of several seminal reference manuals on the design and construction of reinforced soil structures, including manuals for the U.S. Department of Transportation Federal Highway Administration (FHWA) and for the National Concrete Masonry Association.
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