Effects of suction based on stress path on property parameters of unsaturated soils

The effects of suction on mechanical property of unsaturated remolding silt were investigated based on mean effective pressure and mean net pressure according to three kinds of stress paths with GDS apparatus. The results showed that preconsolidation pressure increased with suction based on mean effective pressure, and it was not obvious based on mean net pressure for isotropic compression test. The critical state line of unsaturated soils was not related to suction and was unique based on mean effective pressure, and it was paralleled to the critical state line of saturated soils and far away with suction increasing based on mean net pressure in undrained shear test.

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