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Passive earth pressure - the Caquot – Kérisel theory

Passive earth pressure follows from the following formula:

where: Kp - coefficient of passive earth pressure for δ = -φ, see the table
ψ - reduction coefficient ψ for |δ|<φ, see the table
c - cohesion of soil
σz - vertical geostatic stress

The vertical σpv and horizontal σph  components of passive earth pressure are given by:

where: δ - angle of friction structure - soil
α - back face inclination of the structure



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