Position: Home > Articles > Analysis on nonlinear consolidation of structural soft soil by considering non-Darcian flow
Journal of Jiangsu University (Natural Science Edition)
2017
(4)
472-478
考虑非达西渗流的结构性软土非线性固结分析
作 者：
李传勋;王昌建;王素;董兴泉
单 位：
江苏大学土木工程与力学学院
关键词：
结构性软土;非达西渗流;非线性固结;结构屈服应力;渗透系数
摘 要：
在传统太沙基一维固结理论基础上,引入经典的Hansbo非达西渗流模型,考虑天然土体结构性对固结的影响,建立实际变荷载作用下土体的非线性固结模型,并利用有限差分法求取模型的数值解.在保证数值解可靠性的基础上,分析非达西渗流对结构性软土固结性状的影响及非达西渗流下土体结构性对固结性状的影响.结果表明:非达西渗流下结构性软土的固结速率要比达西定律下慢,且随非达西渗流模型参数m和i1的增大,固结速率的减小愈加明显;对考虑非达西渗流的结构性软土而言,结构屈服应力越大,结构屈服应力前土的压缩指数越小,则结构性软土的固结速率越大,地基土的最终沉降值越小.
译 名：
Analysis on nonlinear consolidation of structural soft soil by considering non-Darcian flow
作 者：
LI Chuanxun;WANG Changjian;WANG Su;DONG Xingquan;Faculty of Civil Engineering and Mechanics,Jiangsu University;
关键词：
structural soft soil;;non-Darcian flow;;nonlinear consolidation;;structural yield stress;;coefficient of permeability
摘 要：
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 timedependent 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 i_1 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 compressionindex below structural yield stress.
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