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Analysis on nonlinear consolidation of structural soft soil by considering non-Darcian flow |
Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract Based on Terzaghi′s theory of consolidation and classical Hansbo′s non-Darcian flow model, a nonlinear consolidation model was developed with consideration of natural soil structure and time-dependent load in practical engineering, and the finite difference method was adopted to obtain numerical solutions of the model. Based on the reliability of numerical solutions, the effects of non-Darcian flow and soil structure on the consolidation behavior of structural soft soil with non-Darcian flow were analyzed. The results show that the consolidation rate of structural soft soil with non-Darcian flow is slower than that with Darcy′s flow. The consolidation rate is decreased with the increasing of m or i1 value. When the non-Darcian flow in structural soft soil layer is considered, the consolidation rate is increased with the increasing of structural yield stress and decreasing of compression-index below structural yield stress. The final settlement is decreased with the increasing of structural yield stress and decreasing of compression-index below structural yield stress.
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Received: 17 October 2016
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