Bearing Pressure—SPT Correlations for Expanded Base Piles in Sand

by William J. Neely, Franki Foundation Co, United States,

Abstract: Design of enlarged base piles is usually carried out using correlations between SPT N values and point resistance. The results of full scale load tests are used to show that base resistance is strongly influenced by grain size characteristics and new correlations are proposed which include both the N values and grain size of the sand.

Subject Headings: Load tests | Load and resistance factor design | Correlation | Dynamic loads | Piles | Grain (material) | Soil pressure | Dynamic pressure

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