Title : Analytical solution for passive earth pressure of c-phi soil using principal stress rotation assumption

Page : PP.31-39

Author(s) : Kourosh Ghaffari Irdmoosa and Hadi Shahir

Keyword : analytical solution, surcharge, Passive pressure, principal stress rotation, c-phi soil

Abstract : 

In the current study, an analytical method was developed for passive earth pressure distribution in c-phi soils using the assumption of principal stress rotation. The trajectory of principal stresses was assumed more general than the previous studies and accordingly a general analytical solution including the surcharge and soil cohesion effects was presented which works well in all ranges of parameters. The proposed equation produces a non-linear distribution for the passive earth pressure which is approximately identical to the Rankine pressure at shallow depths and increases sharply near the wall base and becomes larger than the Coulomb’s pressure. The passive force and its height of application were obtained less than those of the Coulomb’s equation. This indicates that using the Coulomb’s passive equation to check the overturning and sliding of retaining walls is not in the safe side.

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