United States Department of Transportation
i
Load Transfer for Drilled Shafts in Intermediate Geomaterials
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1996-11-01
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[PDF-3.14 MB]
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Abstract:This study investigated the resistance and load-settlement behavior of axially loaded drilled shafts in geomaterials at the boundary between soil and rock, termed "intermediate geomaterials". The primary objective of the study was to develop or adapt simple design-level models to predict resistance and load-settlement behavior. Two models are proposed. The first is based on finite element modeling of drilled shafts with smooth and rough interfaces in cohesive geomaterials, while the second is based on approximate elasticity solution and correlations of geomaterial properties with standard penetration test results in cohesionless geomaterials. Loading tests on seven full-scale drilled shafts were considered as a means to verify the accuracy of the design models and to develop recommendations concerning the inputs to the models. The models are recommended for use pending local calibration.
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