基于指数形式渗流考虑初始有效应力非均匀分布的软土一维非线性固结分析

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Abstract Based on the results of consolidation experiments combining with permeability test，the governing equation of nonlinear consolidation was developed to consider exponential flow law，time-dependent loading and the actual distribution of initial effective stress in actual engineering，and the finite difference solutions for this governing equation were obtained. On condition that exponential flow law was degenerated to Darcy′s law， constant coefficient of consolidation，time-dependent loading and uniform distribution of initial effective stress were considered，the reliability of numerical solutions was verified by comparing the numerical solutions with the corresponding analytical solutions. Furthermore，nonlinear consolidation behavior under different parameters was analyzed. The results show that，if the ratio of the final effective stress to the average value of initial effective stress is less than 2，the rate of consolidation increases under smaller time factor，and decreases under the large long time factor. With the ratio of the final effective stress to the average value of initial effective stress increases，it can be found from the consolidation curves that the rate of consolidation increases with the exponent during the whole process of consolidation. The rate of consolidation with consideration of linear increases of initial effective stress is faster than that with consideration of uniform distribution of initial effective stress. The rate of consolidation increases with loading rate. In addition，both the ratio of the final effective stress to the average value of initial stress and the nonlinear consolidation parameters have greatly influenced on consolidation behavior.

Key words： soil mechanics exponential flow law time-dependent loading nonlinear consolidation actual distribution of initial effective stress finite difference method

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	Articles by authors
	LI Chuanxun1
	2
	XIE Kanghe2
	HU Anfeng2
	LIU Xingwang3
	QI Tian4

Cite this article:

LI Chuanxun1,2,XIE Kanghe2, et al. ANALYSIS OF ONE-DIMENSIONAL NONLINEAR CONSOLIDATION OF SOFT SOIL CONSIDERING EXPONENTIAL FLOW LAW AND NON-UNIFORM DISTRIBUTION OF INITIAL EFFECTIVE STRESS[J]. , 2012, 31(S1): 3270-3277.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/3270

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