Sand Displacement and Compaction around Model Friction Piles

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Abstract
By means of radiography techniques the displacement and compaction of sand around strain gage instrumented model piles has been studied. Tests reveal a possible explanation for the low transfer of load through “skin friction” developed by a straight-sided pile, and the high transfer of load developed by the tapered pile. The limits of “visible” soil movement (displacement envelopes) have been determined for nine different pile conditions and a direct relationship has been found to exist between the magnitude of the displacement envelope and pile capacity, indicating interdependence of transfer of load through the pile point and pile wall.

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