Geosynthetic-Reinforced and Stone Column-Supported Embankments: Numerical and Stability Study

Borges, José Leitão

doi:10.1007/s10706-023-02654-8

“…Typically, a vibroflot is used to create, in the soil to be improved, a granular column containing stiffer sand/ stone with a relatively high friction angle, creating a composite in the ground with greater average strength and stiffness than that of the untreated in situ ground (McCabe et al 2007;Vahedian et al 2014;Najjar et al 2012). Several studies have demonstrated that installing a granular column typically improves the shear strength and settlement behaviour of the reinforced soil compared to the unreinforced soil (Abdelhamid et al 2023;Borges 2023;Islam et al 2023;Mazumder et al 2023Mohamadi Merse et al 2023Shukla et al 2023). The column backfill material is commonly selected based on suitability, economy and availability (Baumann and Bauer 1974;Zukri and Nazir 2018).…”

Section: Introductionmentioning

confidence: 99%

Shear Strength and Consolidation Behaviour of Kaolin Clay Reinforced with a Granular Column Backfilled with Crushed Waste Glass

Kazmi,

Serati,

Williams

et al. 2024

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Granular columns are commonly used for ground improvement. However, minimal research is presently available on the effect of backfill particle size on the geotechnical performance of granular column-reinforced soil. Geo-environmentally, using crushed waste glass (CWG) as a sustainable replacement for depleting traditional construction sands could offer a cleaner feedstock to backfill granular columns while helping recycle growing stockpiles of waste glass, potentially supporting the circular economy transition and decarbonisation of the construction industry. Given these multi-pronged motivations, this study investigated the shear strength and consolidation behaviour of kaolin reinforced with a CWG granular column. Three different particle size ranges (PSR) of CWG were discretely used to install a granular column in the kaolin bed, including fine (0.50–1.0 mm), medium (1.0–1.7 mm) and coarse (1.7–3.35 mm) particles with median particle sizes of 0.78 mm, 1.42 mm and 2.30 mm, respectively. The geocomposite containing a medium CWG column showed the highest increase in friction angle, increasing from 14.0° for kaolin only specimens to 20.7° for the geocomposites. Similarly, the consolidation behaviour of reinforced kaolin (geocomposites) was typically superior to that of kaolin only specimens. Notably, installing a coarse, medium or fine CWG column decreased the average compression index (Cc) of the geocomposites by almost 17%, 35% or 50%, respectively, compared to that of the kaolin only specimens. Given the promising results of this initial study, some suggestions are provided for future studies on assessing the application of CWG as an alternative backfill and sustainable geomaterial in granular column construction.

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“…Typically, a vibroflot is used to create, in the soil to be improved, a granular column containing stiffer sand/ stone with a relatively high friction angle, creating a composite in the ground with greater average strength and stiffness than that of the untreated in situ ground (McCabe et al 2007;Vahedian et al 2014;Najjar et al 2012). Several studies have demonstrated that installing a granular column typically improves the shear strength and settlement behaviour of the reinforced soil compared to the unreinforced soil (Abdelhamid et al 2023;Borges 2023;Islam et al 2023;Mazumder et al 2023Mohamadi Merse et al 2023Shukla et al 2023). The column backfill material is commonly selected based on suitability, economy and availability (Baumann and Bauer 1974;Zukri and Nazir 2018).…”

Section: Introductionmentioning

confidence: 99%

Shear Strength and Consolidation Behaviour of Kaolin Clay Reinforced with a Granular Column Backfilled with Crushed Waste Glass

Kazmi¹,

Serati²,

Williams³

et al. 2023

Preprint

0

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Investigating Soil Arching in Pile-Supported Embankments through Physical Experiments and DEM Simulations

Ma,

Hu,

Xue

et al. 2024

Geotech Geol Eng

2

0

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Geosynthetic-Reinforced and Stone Column-Supported Embankments: Numerical and Stability Study

Cited by 4 publications

References 52 publications

Shear Strength and Consolidation Behaviour of Kaolin Clay Reinforced with a Granular Column Backfilled with Crushed Waste Glass

Shear Strength and Consolidation Behaviour of Kaolin Clay Reinforced with a Granular Column Backfilled with Crushed Waste Glass

Shear Strength and Consolidation Behaviour of Kaolin Clay Reinforced with a Granular Column Backfilled with Crushed Waste Glass

Investigating Soil Arching in Pile-Supported Embankments through Physical Experiments and DEM Simulations

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