Consolidation theory for the stone column reinforced ground with time-dependent drainage boundary considering the foundation stiffness

2021 ◽  
Vol 136 ◽  
pp. 104218
Author(s):  
Yuan Chen ◽  
An-Feng Hu ◽  
Sen-Lin Xie ◽  
Yi-Yang Chen ◽  
Zhao-Qi Gong
Keyword(s):  
Time Dependent ◽  
Stone Column ◽  
Consolidation Theory

Vibro-Stone Column Reinforcement Mechanism and Numerical Analysis

2012 ◽  
Vol 446-449 ◽  
pp. 1940-1943
Author(s):  
Yang Liu ◽  
Hong Xiang Yan
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Pore Pressure ◽  
Numerical Procedure ◽  
Numerical Results ◽  
Excess Pore Pressure ◽  
Stone Column ◽  
Reinforcement Mechanism ◽  
Consolidation Theory ◽  
Excess Pore

Numerical simulation of vibro-stone column is taken to simulate the installation of vibro-stone column. A relationship based on test is adopted to calculate the excess pore pressure induced by vibratory energy during the installation of vibro-stone column. A numerical procedure is developed based on the formula and Terzaghi-Renduric consolidation theory. Finally numerical results of composite stone column are compared single stone column.

scholarly journals Consolidation Theory for a Stone Column Composite Foundation under Multistage Loading

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Shenggen Huang ◽  
Yingtao Feng ◽  
Hao Liu ◽  
Wenbing Wu ◽  
Guoxiong Mei
Keyword(s):  
Separation Of Variables ◽  
Special Property ◽  
Composite Foundation ◽  
Stone Column ◽  
Consolidation Theory ◽  
Present Solution ◽  
Long Time ◽  
Degree Of Consolidation ◽  
Site Test ◽  
Multistage Loading

The consolidation theories considering instant load cannot fully reveal the consolidation mechanism of a stone column composite foundation used in the expressway embankments due to the time effect of loading; that is, the expressway embankments are often constructed in several stages for a long time. Meanwhile, owing to the special property that the pile-soil stress ratio is larger than 1, the consolidation theory for sand drain well foundation cannot be used directly in the consolidation analysis of stone column composite foundation. Based on the principle that the vertical load applied on the composite foundation is shared by the stone column and the surrounding soil, the governing solutions for the stone column composite foundation under a multistage load are established. By virtue of the separation of variables, the corresponding solutions of degree of consolidation for loading stage and maintaining load stage are derived separately. According to the Carrillo theorem, the solution for the average total degree of consolidation of entire composite foundation is also obtained. Finally, the reasonableness of the present solution has been verified by comparing the consolidation curve calculated by the present solution with that measured by site test.

Consolidation Theory of Unsaturated Soils with Vertical Drains Considering Well Resistance and Smear Effect under Time-Dependent Loading

2021 ◽  
Vol 147 (9) ◽  
pp. 04021055
Author(s):  
Deqiang Chen ◽  
Pengpeng Ni ◽  
Xinlei Zhang ◽  
Zheng Chen ◽  
Guoxiong Mei ◽  
...  
Keyword(s):  
Unsaturated Soils ◽  
Time Dependent ◽  
Vertical Drains ◽  
Consolidation Theory

scholarly journals Experimental simulation and mathematical modelling of clogging in stone column

2018 ◽  
Vol 55 (3) ◽  
pp. 427-436 ◽  
Author(s):  
Pei Tai ◽  
Buddhima Indraratna ◽  
Cholachat Rujikiatkamjorn
Keyword(s):  
Current Model ◽  
Soft Clay ◽  
Unit Cell ◽  
Time Dependent ◽  
Experimental Simulation ◽  
Stone Column ◽  
Void Space ◽  
Consolidation Model ◽  
Clay Aggregates ◽  
Strain Model

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 can have on the consolidation of the surrounding soil. Furthermore, load–settlement predictions from the proposed “equal strain” model are also compared with the consolidation response of a previously developed “free strain” model.

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