Settlement behavior of embankment on geosynthetic-encased stone column installed soft ground – A numerical investigation

Yoo, Chai H.

doi:10.1016/j.geotexmem.2015.07.014

Cited by 58 publications

(17 citation statements)

References 21 publications

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“…Besides experimental and analytical solutions, numerical analysis can be used as a powerful tool to investigate the performance of GECs (e.g. Khabbazian et al, 2010;Kaliakin et al, 2012;Keykhos-ropur et al, 2012;Alkhorshid et al, 2014;Yoo, 2015;Mohapatra et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Behavior of Geosynthetic-Encased Stone Columns in Soft Clay: Numerical and Analytical Evaluations

Alkhorshid¹,

Araújo²,

Palmeira³

2018

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The type of improvement technique that will be applied to a soil beneath an embankment depends on the nature of the problematic soil existing at the site. Soft soils beneath embankments typically present high compressibilities and low shear strengths. In some cases, geosynthetic-encased stone columns (GECs) have shown advantages over other solutions to improve embankment behavior. The aim of this study is to investigate the performance of GECs by means of numerical and analytical methods. Finite Element Analyses were conducted to evaluate the behavior of ordinary and geosyntheticencased stone columns underneath an embankment. Parametric studies were then conducted to investigate the influence of geosynthetic stiffness, column spacing, friction angle of column material and Stress Concentration Ratio (SCR) on the performance of the columns. The results obtained have shown that there are several parameters that are of paramount importance in improving the performance of GECs, such as geosynthetics stiffness, column spacing and thickness of soft soil layer.

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Section: Introductionmentioning

confidence: 99%

Behavior of Geosynthetic-Encased Stone Columns in Soft Clay: Numerical and Analytical Evaluations

Alkhorshid¹,

Araújo²,

Palmeira³

2018

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“…In this modeling, a stone column group below an embankment was studied. Results of the research indicated that, application of geosynthetics around stone column accelerates consolidation subsidence of the rehabilitated soil while enhancing load-bearing capacity of the stone column [12].…”

Section: Introductionmentioning

confidence: 98%

Investigation of the Effect of Dimensional Characteristics of Stone Column on Load-Bearing Capacity and Consolidation Time

Mohtasham

Khodaparast

2018

CivileJournal

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One of the best methods for rehabilitating loos and soft soils is the application of stone columns. This method enhances the soil properties by increasing its load-bearing capacity, decreasing the soil subsidence, and accelerating the consolidation rate. In the present paper, numerical analysis of a stone column of 10 m in length into a clayey soil using ABAQUS software is presented. The stone column was modelled based on the concept of unit cell, i.e. a single stone column with the surrounding soil. In this respect, material of the stone column was modelled using the elastoplastic behavioural model of Mohr-Coulomb, while Cam Clay behavioural model was used for the surrounding clayey soil. Furthermore, throughout the analyses performed in this study, effects of different parameters (e.g. applied load on rigid foundation, and the stone column length and diameter) on the subsidence and consolidation time of the rigid foundation were examined. The results indicated that, construction of a stone column into clayey soil decreases the subsidence and consolidation time of the soil considerably. In additions, increases in length and diameter of the stone column were found to significantly contribute to reduced subsidence and consolidation time of soil.

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“…This issue has attracted the attention of many engineers and researchers, and a handful of studies have been conducted to evaluate the geosynthetic-reinforced and semi-rigid column-supported embankments. These vary from laboratory tests (Chen et al, 2008a;Van Eekelen et al, 2012a, 2012bXu et al, 2016;Debnath and Dey, 2017;Esmaeili et al, 2017;Mehdizadeh et al, 2018) to full-scale experiments (Chen et al, 2010;Liu et al, 2012;Hong et al, 2014;Weng et al, 2014;Liu et al, 2015;Rowe and Liu, 2015;Van Eekelen et al, 2015;Cao et al, 2016;Van Eekelen et al, 2017;Michalowski et al, 2018;Tano et al, 2018;Wang et al, 2018aWang et al, , 2018c and from analytical models (Balaam and Booker, 1981;Deb, 2010;Karim et al, 2011;Van Eekelen et al, 2011Zhou et al, 2012;Yang et al, 2013;Zhuang et al, 2014;Jamsawang et al, 2016;Van Eekelen, 2016;Feng et al, 2017b;Zhao et al, 2017) to numerical simulations (Huang and Han, 2009;Jiang et al, 2014;Kamash and Han, 2014;Lai et al, 2014;Yoo, 2015;Zhuang and Wang, 2015;Liu et al, 2017;…”

Section: Introductionmentioning

confidence: 99%

A closed-form solution for column-supported embankments with geosynthetic reinforcement

Zhao

Zhou

Geng

et al. 2019

Geotextiles and Geomembranes

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Settlement behavior of embankment on geosynthetic-encased stone column installed soft ground – A numerical investigation

Cited by 58 publications

References 21 publications

Behavior of Geosynthetic-Encased Stone Columns in Soft Clay: Numerical and Analytical Evaluations

Behavior of Geosynthetic-Encased Stone Columns in Soft Clay: Numerical and Analytical Evaluations

Investigation of the Effect of Dimensional Characteristics of Stone Column on Load-Bearing Capacity and Consolidation Time

A closed-form solution for column-supported embankments with geosynthetic reinforcement

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