Experimental simulation and mathematical modelling of clogging in stone column
Experimental simulation and mathematical modelling of clogging in stone column
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DOI：
10.1139/cgj-2017-0271
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发表时间：
2018-03
影响因子：
3.6
通讯作者：
P. Tai;B. Indraratna;Cholachat Rujikiatkamjorn
中科院分区：
文献类型：
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作者：
P. Tai;B. Indraratna;Cholachat Rujikiatkamjorn
本文研究了由单个碎石桩与周围软粘土相互作用组成的单胞模型的时变堵塞问题。对堵塞进行定量评估，并使用计算机断层摄影术确定柱的相应空隙。实验结果表明，柱体上部的堵塞程度较大，但随着深度的增加，堵塞程度迅速减小。堵塞区的土壤性质是通过对含有不同粘土分数的粘土-集料混合物的附加试验间接确定的。建立了基于单胞分析原理的等应变固结模型，该模型同时考虑了初始堵塞和随时间变化的堵塞。该模型考虑了渗透率的降低和柱的可压缩性的增加。在不考虑堵塞的情况下，该模型与前人的研究结果一致，而与所选模型的比较则表明了石柱堵塞的影响。
In this paper, time-dependent clogging is studied considering a unit cell consisting of a single stone column interacting with the surrounding soft clay. Clogging is assessed quantitatively and the corresponding void space of the column is determined using computed tomography. It is observed that the extent of clogging is substantial in the upper part of the column, but diminishes rapidly with depth. The soil properties in the clogged zone are determined indirectly through additional tests of clay–aggregates mixtures with various clay fractions. An equal strain consolidation model based on the principle of unit cell analysis is developed to capture both the initial and time-dependent clogging. The model accounts for a reduction in permeability and an increase in compressibility of the column. This current model, as expected, offers identical results to some previous studies if clogging is ignored, while the comparison with other selected models demonstrates the influence that clogging of the stone column ...