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Base Resistance of Drilled Shafts in Fractured Rock
A method for estimating the nominal base resistance of drilled shafts in fractured rock based on uniaxial compressive strength and the Geological Strength Index (GSI) is presented and evaluated against a limited number of field load tests. The method is based on a bearing capacity model which is formulated in terms of the Hoek-Brown strength parameters, which are evaluated empirically through correlation to GSI and rock type. The method accounts for the effect of overburden stress, which is shown to increase in significance as the intact rock strength decreases. Comparison to a limited number of field load test results indicates this method provides a useful tool for estimating base resistance in rock mass that is appropriately characterized by GSI.
Base Resistance of Drilled Shafts in Fractured Rock
A method for estimating the nominal base resistance of drilled shafts in fractured rock based on uniaxial compressive strength and the Geological Strength Index (GSI) is presented and evaluated against a limited number of field load tests. The method is based on a bearing capacity model which is formulated in terms of the Hoek-Brown strength parameters, which are evaluated empirically through correlation to GSI and rock type. The method accounts for the effect of overburden stress, which is shown to increase in significance as the intact rock strength decreases. Comparison to a limited number of field load test results indicates this method provides a useful tool for estimating base resistance in rock mass that is appropriately characterized by GSI.
Base Resistance of Drilled Shafts in Fractured Rock
Turner, John P. (author) / Ramey, Stetson B. (author)
Art of Foundation Engineering Practice Congress 2010 ; 2010 ; West Palm Beach, Florida, United States
Art of Foundation Engineering Practice ; 687-701
2010-02-18
Conference paper
Electronic Resource
English
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