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This paper describes a soil classification framework for Cone Penetration Test (CPT) data that uses a multi-sleeve attachment with friction sleeves of varying surface roughness for measurement of the soil interface shear response. The characterization exercise presented herein focuses on intermediate and structured soils, and provides comparison with the characterization results provided by other existing classification systems. The results indicate that the soil classification provided by the proposed framework better agrees with index properties as compared to other systems. The proposed framework is based on two independent parameters that capture different aspects of soil behavior: the normalized Multi Friction Parameter (MFP), and the normalized tip resistance (Qtn). The MFP is obtained using multiple rough and conventional CPT friction sleeve measurements in the same sounding that allows for capture of the interface strength versus surface roughness relationship while Qtn captures the soil’s internal strength and state through measurement of bearing capacity resistance. A discussion of the practical implications of utilizing the proposed soil classification system is provided.
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