Fig. 3

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Notations : β : pente du talus du terrain derrière le mur ; δp : inclinaison de la force de poussée Qp par rapport à la normale au mur (-φ à 0) ; λ : inclinaison du parement arrière du mur par rapport à la verticale ; θ : paramètre de calcul (inclinaison de la base AC du prisme ABC) ; P : poids du prisme ABC ; R : force de frottement limite sur AC (inclinée de φ par rapport à la normale).
Coulomb’s design diagram for calculating passive earth pressure on a wall with height H.
Notations: β: slope of the ground behind the wall; δp: inclination of the passive force Qp with respect to the normal to the wall (-φ to 0); λ: inclination of the rear face of the wall with respect to vertical; θ: angle used for calculations (inclination of the base AC of prism ABC); P: weight of prism ABC; R: limit friction force acting on AC (inclined to the normal by φ).
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