Analysis of negative skin friction and bending moment on batter rock-socketed pile

Abstract

A theoretical model is proposed to analyze the soil settlement-induced negative skin friction and bending moment on a batter rock-socketed pile (BRSP). A series of model tests were conducted to verify the accuracy of the proposed theoretical model. Parametric studies are conducted to investigate the effects of the inclined angle and diameter of BRSP, and the consolidation settlement of surrounding soil on the bending moment and skin friction on the BRSP. Under the settlement of surrounding soil, the axial forces and the bending moments of BRSP nonlinearly distribute in the clay layer and reach their maximum magnitudes at the rock-soil surface and rapidly attenuated to zero in the rock layer. The deflections of BRSPs decrease linearly along the pile embedded in the clay layer and decrease to zero at the rock-soil interface.