West Val Marie Dam Spillway –Uplift Mitigation Improvements
Jorge Gutierrez, Michael Grisdale, Shifullah Khaled
Dans les comptes rendus d’articles de la conférence: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Dams and Embankments 1
ABSTRACT: The concrete spillway (the spillway) to the West Val Marie Dam (the dam) was built in the 1950s and was designed with a heavy reliance on the ability of its under-slab drainage system (UDS) to mitigate hydraulic jump uplift forces. The existing UDS was constructed with materials now exceeding their intended service life and needed repairs, posing a high risk of failure due to uplift forces during high-flow events. Various measures were explored to mitigate these vulnerabilities and associated risks, with a preference for passive measures. The selected improvements included a partial decommissioning of the existing UDS, installing 44 new shallow point drains, and installing 138 soil anchors with a bond length of 7 m. This paper discusses processes for weighing long-term costs against short-term risks, selecting, and designing mitigation measures, and assessing construction risks.
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Citer cet article:
Gutierrez, Jorge, Grisdale, Michael, Khaled, Shifullah (2023) West Val Marie Dam Spillway –Uplift Mitigation Improvements in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Gutierrez_GEO2023_86,
author = {{Gutierrez, Jorge}, {Grisdale, Michael}, {Khaled, Shifullah}}
title = {West Val Marie Dam Spillway –Uplift Mitigation Improvements }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {West Val Marie Dam Spillway –Uplift Mitigation Improvements }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }