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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 pressureare given by:

where:

δ

-

angle of friction between structure and soil

α

-

back face inclination of the structure