Vertical drain assisted by vacuum and/or surcharge preloading is an effective method for improvement of soft ground with high water content. A large settlement will occur, and the water flow may deviate from the Darcy's law. The creep is also non-negligible in estimating the long-term settlement of such soft ground. To accurately predict the consolidation process, this study develops an axisymmetric finite strain consolidation model based on Barron's free-strain theory incorporating the creep, radial and vertical flows, non-Darcian flow law, and void ratio-dependent hydraulic conductivity during the consolidation process. First, to mathematically validate the model and highlight the new model's features, the existing model not considering the creep and the non-Darcy flow is also adopted as a reference for comparison based on a benchmark simulation. Then, Rowe cell tests involving non-Darcian flow are simulated by the new model to experimentally validate the predictive performance. Furthermore, the model is applied to simulate the consolidation process of a long-term monitoring embankment to examine the applicability of the model for engineering practice. All results demonstrate that the model is capable of accurately describing the consolidation of soft soils with vertical drains under combined loading with features of creep and non-Darcy flow.

中文翻译：

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考虑蠕变和非达西流的联合荷载下垂直排水软土固结轴对称有限应变固结模型

真空和/或堆载预压辅助垂直排水是高含水软土地基改良的有效方法。会发生大的沉降，水流可能会偏离达西定律。在估计此类软土地基的长期沉降时，蠕变也是不可忽略的。为了准确预测固结过程，本研究基于巴伦自由应变理论开发了轴对称有限应变固结模型，该模型结合了固结过程中的蠕变、径向和垂直流动、非达西流动定律以及与孔隙比相关的导水率。首先，为了对模型进行数学验证并突出新模型的特点，在基准模拟的基础上，也采用未考虑蠕变和非达西流的现有模型作为参考进行比较。然后，通过新模型模拟涉及非达西流的Rowe单元测试，以实验验证预测性能。此外，应用该模型模拟了长期监测路堤的固结过程，检验了模型的工程实践适用性。结果表明，该模型能够准确描述具有蠕变和非达西流特征的联合荷载下垂直排水软土的固结。