Soil slope analysis to develop useful correlations in saturated and unsaturated conditions

Abstract

Shear strength (τ), shear stress (σs) and slope angle (β) plays a very important role in the stability of any soil slope. This research investigates the slope stability of a soil slope in order to determine correlations between shear strength with slope angle and shear stress. The assessment and calculation of the soil slope are carried out using slope stability analysis methods that assumed the failure surface as circular slip surface. A limit equilibrium software namely Slide and numerical modelling software namely Statistical Package for Social Sciences (SPSS) are used for the analysis. A total number of two hundred analysis are performed with varying slope angle of 70 to 88 degrees. Correlations are developed between τ, β and σs, which shows a very close relationship of all these three parameters. Applicability of the equations is above 97%. The correlations can be used in any slope stability project to know about the shear strength of the slope with variation in the value of slope angle and shear stress.