A new concept in slope stability analysis

摘要

The present methods to approximate the slope equilibrium state are developed based on the idea of stress limit. The essential deficiency consists of avoiding the deformability effect of soils in initiating the landsliding process by its variabilityin function of the moisture content and the uncorrelation with the preexistent stress state by self compression. Therefore new indeces are defined I_(#DELTA#)(#sigma#)=#tau#_(max)(#sigma#)/#DELTA#_(max) and I_(#DELTA#)'(#sigma#)=(#tau#_(max)-#tau#_(residual))/(#DELTA#_(residual)-#DELTA#_(max)), the displacement indeces as soil characteristics, that linked with the mobilization functions of the shear strength #phi#(#DELTA#) and c(#DELTA#) and with the soil modulus E(w) allow the approximation of the deformations/displacements along the failure surface and thus, the approximation of the stability degree for the first time in terms of deformations/displacements-limit. The expounded principles are applied with priority to the gradual landslides where the blocks that lose their stability are those upstream.