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Passive earth pressure - the Coulomb theory
Passive earth pressure follows from the following formula:
| where: | σz | - | effective vertical geostatic stress |
| Kp | - | coefficient of passive earth pressure due to Coulomb | |
| c | - | cohesion of soil |
The coefficient of passive earth pressure Kp is given by:
| where: | φ | - | angle of internal friction of soil |
| δ | - | angle of friction structure - soil | |
| β | - | slope inclination | |
| α | - | back face inclination of the structure |
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 |
Literature:
Arnold Verruijt: Soil mechanics, Delft University of Technology, 2001, 2006, http://geo.verruijt.net/
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