The Borden Bridges – Remedial Design for a Large Scale Deep Seated Landslide
Jon Osback, Allen Kelly, Wayne Clifton
In the proceedings of: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Geohazards 1
ABSTRACT: The east abutments of the Borden bridges, located on Saskatchewan Highway No. 16 across the North Saskatchewan River, were constructed atop ancient landslide debris in 1937, 1985 and 1997. The slip surface is located within bedrock clay shale at a depth between 38 m and 44 m and has been sheared to residual strengths. Post construction displacements were minimal, until 2010 – 2012, when higher than average precipitation led to increased porewater pressures and subsequent displacement in the range of 30 mm/yr, resulting in the shearing off of some slope inclinometers. The risk of future damage to the bridge was a significant concern. This case study paper summarizes the 2D and 3D stability analysis undertaken to assess remedial options and produce a remedial design, along with the key impacts to the factor of safety at this site.
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Osback, Jon, Kelly, Allen, Clifton, Wayne (2023) The Borden Bridges – Remedial Design for a Large Scale Deep Seated Landslide in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Osback_GEO2023_11,
author = {{Osback, Jon}, {Kelly, Allen}, {Clifton, Wayne}}
title = {The Borden Bridges – Remedial Design for a Large Scale Deep Seated Landslide }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {The Borden Bridges – Remedial Design for a Large Scale Deep Seated Landslide }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }