Design And Construction of A 9-Meter-High Embankment Over Champlain Sea Clay
Gohe A Metaferia, Louis D\’Amours
In the proceedings of: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Foundations 3
ABSTRACT: In Eastern Canada, dealing with normally, or minimally over-consolidated clays from the Champlain Sea deposit often demands innovative approaches. This study focuses on a case where a 9-meter-high embankment was needed for a fast-paced P3 transit project in the Canadian Capital. The project faced tight scheduling, space constraints, and rather strict settlement limit tolerances. Investigating the site's silty clay deposit overlying bedrock revealed a lower over-consolidation ratio (OCR) than initially estimated, affecting its behavior. The selected solution involved rapid consolidation of the clay using vertical wick-drains and surcharging. This enhanced the clay's strength, supporting a retaining structure. Additionally, lightweight EPS embankment fill minimized settlements. Geotechnical monitoring aligned closely with predictions, validating the approach. Despite challenges from the sensitive clays, the project successfully managed embankment construction, meeting performance criteria through innovative geotechnical interventions and careful monitoring.
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Metaferia, Gohe A, D\’Amours, Louis (2023) Design And Construction of A 9-Meter-High Embankment Over Champlain Sea Clay in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Metaferia_GEO2023_163,
author = {{Metaferia, Gohe A}, {D\’Amours, Louis}}
title = {Design And Construction of A 9-Meter-High Embankment Over Champlain Sea Clay }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Design And Construction of A 9-Meter-High Embankment Over Champlain Sea Clay }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }