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Modelling electro-osmosis-surcharge preloading combined consolidation of unsaturated soils

机译：非饱和土电渗-附加预压联合固结模拟

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摘要

Electro-osmosis often dewaters soils into unsaturated conditions. The unsaturated conditions invalidate electroosmosis models that are developed by assuming presence of full saturation throughout. The unsaturated condition causes non-negligible influences on soil geomechanical properties and its consolidation behaviour, and should be accounted for. This study presents a numerical model, UEC2, of simulating electro-osmosis-surcharge preloading combined consolidation considering varied degree of saturation of soil. Model UEC2 is able to capture nonlinear changes of soil properties, time-dependent loading and instantaneous pore air compression. This model was validated against laboratory test results, and was applied to varied test examples in order to assess evolvement of unsaturated conditions and its effect on consolidation.
机译：电渗常常使土壤脱水至不饱和状态。不饱和条件使电渗模型无效，而电渗模型通过假设始终存在完全饱和来建立。不饱和条件对土壤地质力学特性及其固结特性的影响不可忽略，应予以考虑。这项研究提出了一个数值模型UEC2，该模型模拟了考虑土壤饱和度变化程度的电渗-附加预载联合固结。 UEC2模型能够捕获土壤性质的非线性变化，随时间变化的载荷和瞬时孔隙空气压缩。该模型针对实验室测试结果进行了验证，并应用于各种测试示例，以评估不饱和条件的演变及其对固结的影响。

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