Recovery of Skin Friction of Cambridge Gault Clay with Time Effect

抄録

The link between pile wall adhesion factor (soil shear strength modification factor) α and undrained shear strength Cu was widely analyzed by a number of researchers. The adhesion factor is used to calculate the ultimate skin friction of piles. However, how much the skin friction increases from installation stage i.e. mobile skin friction, to the maximum value i.e. static skin friction is not widely researched. Due to the uncertainty, the static skin friction is often underestimated, especially, when the skin friction during pile installation is low. This paper features the tendency of the recovery of the skin friction and time effect on the recovery. As a research model, over consolidated clay, called Cambridge Gault Clay was studied.