INTERFACE SHEAR CHARACTERISTICS FOR DRIVEN STEEL PILES IN SAND WITH A HIGH SILT/CLAY FRACTION

摘要

This paper presents the findings of a series of laboratory tests to investigate the effect of variation in the fines content on the interface friction angle between soil and steel. A series of soil on steel interface tests have been performed in a modified Bishop ring shear apparatus to assess the effect of fines content on the interface friction angle results. In addition to this, other factors, such as overconsolidation and shearing rate, have been assessed. The results of the tests undertaken expose that both the peak and constant volume interface friction angle are affected by the level of fines within a sample. Also shown is that altering shearing rate while still allowing adequate time for pore pressure dissipation, has no effect on the results, and that overconsolidation brings about changes in peak but not constant volume interface friction angles.