Coulomb analytic solution of active earth pressure for unsaturated expansive soils
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Abstract:
The strength characteristics of unsaturated expansive soil was analyzed，based on the plane sliding surface assumption, the analytical formula of the active earth pressure calculation for unsaturated expansive soil was proposed which considered the relationship between water content and strength of unsaturated expansive soil and other relevant factors, using the basic principle of Coulomb theory, and practical example was used to validate the formula. The example showed that the active earth pressure increased with the increase of moisture , while the magnitude of the change decreased; If the influence of water content was not considered, the result was conservative; The active earth pressure of expansive soil and the angle of filling sliding surface with the horizontal could be obtained directly applying the method established in this study.
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