Estimation of Stability of an Unsupported Deep Vertical Cut in Clay
Geeshpati Yanamandra, Won Taek Oh
In the proceedings of: GeoVirtual 2020: 73rd Canadian Geotechnical ConferenceABSTRACT: Finite element analysis was performed to simulate the excavation of an unsupported deep vertical cut (depth = 9.75 m) in clay at Welland, Ontario (Kwan 1971). For this, SIGMA/W and SLOPE/W (GeoStudio 2019 R2) were used to simulate staged excavation and to estimate its stability, respectively. To maintain the consistency of obtained results with field conditions, the simulated excavation followed the same timeline as field excavation. There was good agreement between the measured post excavation pore-water pressure contours obtained from installed field instruments with those from the numerical modelling. The numerical analysis results also showed that the failure in the cut was attributed to a tension crack, which is consistent with field observations.
RÉSUMÉ: Une analyse par éléments finis a été effectuée pour simuler l'excavation d'une coupe verticale profonde non soutenue (profondeur = 9,75 m) dans l'argile à Welland, Ontario (Kwan 1971). Pour cela, SIGMA / W et SLOPE / W (GeoStudio 2019 R2) ont été utilisés pour simuler l'excavation par étapes et pour estimer sa stabilité, respectivement. Pour maintenir la cohérence des résultats obtenus avec les conditions du terrain, l'excavation simulée a suivi la même chronologie que l'excavation sur le terrain. Il y avait un bon accord entre les contours de pression interstitielle mesurés après l'excavation obtenus à partir des instruments de terrain installés avec ceux de la modélisation numérique. Les résultats de l'analyse numérique ont également montré que la rupture de la coupe était attribuée à une fissure de tension, ce qui est cohérent avec les observations sur le terrain.
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Yanamandra, Geeshpati, Oh, Won Taek (2020) Estimation of Stability of an Unsupported Deep Vertical Cut in Clay in GEO2020. Ottawa, Ontario: Canadian Geotechnical Society.
@article{Yanamandra_GEO2020_156,
author = {Yanamandra, Geeshpati}, {Oh, Won Taek},
title = Estimation of Stability of an Unsupported Deep Vertical Cut in Clay ,
year = 2020
}
title = Estimation of Stability of an Unsupported Deep Vertical Cut in Clay ,
year = 2020
}