A short note on the earth pressure and mobilized angle of internal friction in one-dimensional compression of soils

In this note an empirical expression for the coefficient of earth pressure at-rest K0 in terms of the mobilized angle of internal friction φmob in one-dimensional compression of normally consolidated soils is presented. It was obtained from published experimental data in a straightforward manner and without any assumptions. Although it is empirical, the equation has a better basis in terms of soil behaviour than the familiar Jaky's equation and, for the full range of K0 (= K0NC) values considered, it provides slightly better predictions than the Jaky and three other prediction equations.