A method for calculating active earth pressure considering shear stress

In order to eliminate the calculation inaccuracy,considering the effect of the angle of internal friction on the inclination of the sliding plane of soils behind retaining wall,considering the deflected principal stress as soil arching effect,the horizontally earth pressure factor is calculated for different friction angles of soil and friction angle between wall-surface and soil based on the analysis about minor principal stress of soil arching elements to study the vertical stress.The theoretical formulae of the active earth pressures,the resultant earth pressures and the points of application of resultant earth pressures were obtained based on the method which satisfies the equilibrium condition.The formula presented is compared with some experimental observations.The results agree well with those of the experimental observations.