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Date of Publication:2022-10-09

Journal:大连理工大学学报

Issue:2

Page Number:179-184

ISSN No.:1000-8608

Abstract:The dehumidified soil water characteristic curves (SWCCs)of the silty clay specimens prepared using the moist tamping method and the slurry consolidation method were measured based on the pressure plate extractor.The SWCCs of the slurry consolidated triaxial specimens subjected to different numbers of drying-wetting cycle were also measured.The effects of the specimen preparation method and drying-wetting cycles were analyzed.Additionally,the soil microstructure before and after drying-wetting cycle was investigated using the scanning electron microscopy (SEM).The experimental data shows that the SWCC of the slurry consolidated triaxial specimen is located in the upside of that of the impacted specimen.The SWCC shifts to the left after drying-wetting cycle and reaches an equilibrium state after 2-3 cycles of drying-wetting.The dehumidified SWCCs of the slurry consolidated triaxial specimens subjected to different numbers of drying-wetting cycles can be exactly fitted by the Van Genuchten model.The relationship between the parameters of the Van Genuchten model and the number of drying-wetting cycles can be described by an exponential function.

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