Effect of drainage conditions on cone penetration testing in silty soils

Rikke Poulsen, Benjaminn Nordahl Nielsen, Lars Bo Ibsen

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: In Situ Testing

ABSTRACT: This paper discusses the challenges that occur when performing Cone Penetration Tests (CPT) in silty soil due to changes in drainage conditions. In this paper, CPT results from various papers and researchers are collected and interpreted. Results from cone penetrations tests with various penetration rates is analysed, and it is shown how the changes in drainage condition, caused by the change in penetration rate, affects the plot in the soil classification charts. In addition, the effect on changes in penetration rate is compared for clay and silt, respectively, where the silty soil is more susceptible towards change in penetration rate. A normalized penetration rate is implemented in order to compare various cone resistance results, and hence investigate the changes from undrained to partially drained and from partially drained to fully drained. PRESENTACIONES TÉCNICAS En este artículo son discutidas las dificultades que ocurren cuando se llevan a cabo Ensayos de Penetración Cónica (CPT) en suelos limosos debido a cambios en las condiciones de drenado. Los resultados de los Ensayos de Penetración Cónica de otros artículos e investigadores son recopilados e interpretados. Resultados de CPT™s con varias velocidades de penetración son analizados y se muestra como los cambios en las condiciones de drenado causados por el cambio en el la velocidad de penetración afecta el diagrama en la clasificación del suelo. Adicionalmente, el efecto del cambio de la velocidad de penetración es comparado para arcilla y limos respectivamente, donde los suelos limosos son más susceptibles a cambios en la velocidad de penetración. Una velocidad de penetración normalizada es implementada con el fin de comparar varios resultados de resistencia del cono y así investigar los cambios de no-drenado a parcialmente drenado y de parcialmente drenado a completamente drenado.

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Cite this article:
Rikke Poulsen; Benjaminn Nordahl Nielsen; Lars Bo Ibsen (2011) Effect of drainage conditions on cone penetration testing in silty soils in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper1097,author = Rikke Poulsen; Benjaminn Nordahl Nielsen; Lars Bo Ibsen ,title = Effect of drainage conditions on cone penetration testing in silty soils ,year = 2011}