Determination of Unit Tip Resistance for Drilled Shafts in Fractured Rocks using the Global Rock Mass Strength
Miguel Truzman, David Corley, David Lipka
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 EngineeringSession: Deep Foundations
RESUMEN: En los últimos años, los autores han utilizado las Especificaciones de Diseño de la AASHTO LRFD para calcular la resistencia factorizada de pilotes excavados con la punta en rocas fracturadas alrededor del área de Charlotte en Carolina del Norte. Estas rocas típicamente consisten en granitos, dioritas y metavolcánicas y la mayoría de ellas presentan un variado grado de meteorización. Con la actual ecuación recomendada en las Especificaciones de Diseño se obtienen valores unitarios conservadores de la resistencia por punta cuando la roca de fundación tiene una Valoración del Macizo Rocoso (RMR) menor a 45. Este artículo evalúa la ecuación de resistencia global de macizos rocosos propuesta por Hoek et. al. (2002) para determinar valores de resistencia más razonables para macizos con calidades de roca de pobre a mediana con valores del RMR menores a 45. Adicionalmente, se propone una correlación para determinar el RMR y el Indice de Resistencia Geológica (GSI) basado en valores de Designación de la Calidad de Roca (RQD).
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Truzman, Miguel, Corley, David, Lipka, David (2011) Determination of Unit Tip Resistance for Drilled Shafts in Fractured Rocks using the Global Rock Mass Strength in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Truzman_GEO2011_1036,
author = {{Truzman, Miguel}, {Corley, David}, {Lipka, David}}
title = {Determination of Unit Tip Resistance for Drilled Shafts in Fractured Rocks using the Global Rock Mass Strength}
booktitle = {Proceedings of the 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}
year = {2011}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Determination of Unit Tip Resistance for Drilled Shafts in Fractured Rocks using the Global Rock Mass Strength}
booktitle = {Proceedings of the 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}
year = {2011}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }