Ductile response of piles to stabilise landslide

Abstract

Piles in stabilising landslides are subjected to response amplification and brittle failure. To induce ductile response, new rigid (sliding layer)-elastic-plastic (stable layer) (R-EP) solutions for rotational piles are established. New expressions are derived to obtain rotational stiffness and rotational depth with and without plasticity. The solutions and the expressions are underpinned by limiting force per unit length, subgrade modulus and rotational stiffness. Non-dimensional charts are provided concerning the depth, the stiffness and the stiffness singularity on typical pile response. Five instrumented piles are studied, and a typical example is elaborated. The R-EP model and expressions promote ductile response of slope stabilising piles.