A new approach for loose silty deposits of the Trois-Rivieres area
B. Rousseau, S. Graveline, A. Philibert
In the proceedings of: GeoRegina 2014: 67th Canadian Geotechnical ConferenceSession: Soil Mechanics
ABSTRACT: The Trois Rivieres area presents silty soils that may liquefy under seismic loading. In addition, these soils are very sensitive to sampling. Therefore, conventional sampling techniques (SPT) minimize the Nspt index values. That is why, a new methodology was introduced. On the one hand, it consists in using Pressuremeter data to determine the values of geotechnical parameters. On the other hand, it consists in measuring the downhole shear wave velocities, Vs, to assess the Cyclic Resistance Ratio (CRR). The results of this method are encouraging because they can provide the most accurate picture of the areas studied, without threaten the safety of users.
RÉSUMÉ: La région de Trois-Rivières présente des sols susceptibles de se liquéfier sous une sollicitation sismique. De plus, ces sols sont très sensibles au remaniement. C™est pourquoi, les techniques conventionnelles de prélèvement (SPT), minimisent les valeurs des indices « Nspt ». Ainsi, une nouvelle méthodologie a été mise en place. Elle consiste à, d™une part, utiliser des données pressiométriques afin de déterminer les valeurs de résistances géotechniques et d™autre part, des données de mesures des vitesses des ondes de cisaillement, Vs, afin d™évaluer le Cyclic Resistance Ratio (CRR). Les résultats de cette méthode sont encourageants car ils permettent de dresser le portrait le plus juste des terrains étudiés, sans toutefois, nuire à la sécurité des usagers.
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Cite this article:
B. Rousseau; S. Graveline; A. Philibert (2014) A new approach for loose silty deposits of the Trois-Rivieres area in GEO2014. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GeoRegina14Paper453,
author = B. Rousseau; S. Graveline; A. Philibert,
title = A new approach for loose silty deposits of the Trois-Rivieres area ,
year = 2014
}
title = A new approach for loose silty deposits of the Trois-Rivieres area ,
year = 2014
}