Abstract
Negative skin friction acting on an elastic pile which, penetrating through a clay layer, reaches a rigid ground are studied in this report. It is assumed that at some depth a settlement of a pile is equal to that of a ground when skin friction is in the elastic state. When skin friction is in the plastic state, it is assumed that skin friction is equal to its strength and a relative displacement between the pile and the ground occurs. From these conditions two integral equations are obtained, and conditions which these equations must satisfy are studied. On negative skin friction which acts on a rigid pile and on an elastic pile in the case of a uniformly distributed load on the surface of a ground, two examples are computed numerically. Distributions of negative skin friction, axial force of the pile, earth pressure acting on the surface of the pile, and settlement of the ground are shown and their characteristics are studied.
