Consolidation of soft clay foundation improved by geosynthetic-reinforced granular columns: Numerical evaluation

Alkhorshid, Nima Rostami; Araújo, Gregório Luís Silva; Palmeira, Ennio M.

doi:10.1016/j.jrmge.2021.03.004

Cited by 30 publications

(7 citation statements)

References 36 publications

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“…Granular columns are widely used in geotechnical engineering to reduce settlement, increase bearing capacity, accelerate consolidation, and decrease liquefaction potential [6]. The model was evaluated on granular columns with and without reinforcement at various depths, including short, floating, and fully penetrated columns.…”

Section: Introductionmentioning

confidence: 99%

Influence of Voltage on Pore Water Pressure for Soft Soil Treated with Electro-Osmosis Technique

Wahhab

Aljanabi

2023

DJES

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Geotechnical engineers have a difficult time working with soft soils because they take so long to reach their final settlement and drain water under pressure. Granular columns and other modern technology are just two of the many methods utilized to hasten this leveling. In this study, the alteration of clay soils with a granular column and the evacuation of water by an electric field were replicated using 2D engineering and a finite component. solid mechanics and electrical interfaces are built using the drag interface. Mohr-Coulomb relied on a granular column and fine clay soil at the mechanical contact and employed electro-osmosis to describe the model's electric field's impact. For a period of six months, the pore water pressure for the fine clay soil was calculated. The result showed that when the electric current is applied with a voltage (5 v) the pwp in soil increases in first two months and then begins to gradually decrease, reaching in sixth month (120 kPa) and when applied voltage increases (15 v) the pwp decrease in the first two months from the previous ratio of voltage then it begins to gradually decrease and reaches in sixth month (70 kPa), When applied voltage increases more (30 v) the pwp in the soil decreases in first two months from the previous ratios of voltages, then it begins to gradually decrease and reaches (40 kPa), The percentage of water leaving the soil when an electric current is applied from (5-15 v) was (64%) and when voltage increased to (15-30 v) became (75%) which means the applied voltage increases, cause more water is discharged from the soil. The soil settlement also increases with an increase in the voltage, as the improvement percentage and the water exit from the soil (50%) at (5-15 v) and (71%) at (15-30 v).

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Section: Introductionmentioning

confidence: 99%

Influence of Voltage on Pore Water Pressure for Soft Soil Treated with Electro-Osmosis Technique

Wahhab

Aljanabi

2023

DJES

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“…It is stable, has a wide variety, has good mechanical properties, and is suitable for plugging water in oil reservoirs with large pores. Expanded granules Gels 2023, 9, 479 2 of 13 are a type of granular plugging agent developed in the last 20 years and can be expanded when encountering water; they are cross-linked, granulated, and dried on the ground, avoiding the influence of complex conditions of the formation on the cross-linking of the system, which can better plug the reservoir with large pores [4]. Compared with cementbased inorganic granular plugging agents and curable granular plugging agents widely used in the Tahe Oilfield, the expanded granules can absorb water and swell, can plug the throat with their deformation, or penetrate the formation through deformation under certain pressure differences to seal the high-permeability layer containing seams and, large pores [5,6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Performance Evaluation of a Novel Nanoparticle Coupling Expanded Granule Plugging Agent

et al. 2023

Gels

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This study focuses on the characteristics of fractured and vuggy high-temperature and high-salt reservoirs in the Tahe Oilfield. The Acrylamide/2-acrylamide-2-methylpropanesulfonic copolymer salt was selected as a polymer; the hydroquinone and hexamethylene tetramine was selected as the crosslinking agent with a ratio of 1:1; the nanoparticle SiO2 was selected, and its dosage was optimized to 0.3%; Additionally, a novel nanoparticle coupling polymer gel was independently synthesized. The surface of the gel was a three-dimensional network structure, with grids arranged in pieces and interlaced with each other, and the structure was very stable. The SiO2 nanoparticles were attached to the gel skeleton, forming effective coupling and enhancing the strength of the gel skeleton. To solve the problem of complex gel preparation and transportation, the novel gel is compressed, pelletized, and dried into expanded particles through industrial granulation, and the disadvantage of the rapid expansion of expanded particles is optimized through physical film coating treatment. Finally, a novel nanoparticle coupling expanded granule plugging agent was developed. Evaluation of the performance of the novel nanoparticle coupling expanded granule plugging agent. With an increase in temperature and mineralization, the expansion multiplier of granules decreases; aged under high-temperature and high-salt conditions for 30 days, the expansion multiplier of granules can still reach 3.5 times, the toughness index is 1.61, and the long-term stability of the granules can be good; the water plugging rate of granules is 97.84%, which is superior to other widely used particle-based plugging agents.

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“…As a result, the stone column bulges and pushes the surrounding soil radially, reducing efficiency. Hence, studies have tried to employ various geosynthetics to reinforce the stone column and provide confining pressure around it [6][7][8][9][10][11][12], and reduce stress concentration at the column's top by placing a reinforced granular blanket [13,14]. In response to this improvement, the stone column can take vertical loads and reduce bulging.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Using Reinforced Granular Blanket and Single Stone Column on Improvement of Sandy Soil: Experimental Study

Shahmandi,

Ghazavi,

Barkhordari

et al. 2023

IJE

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Consolidation of soft clay foundation improved by geosynthetic-reinforced granular columns: Numerical evaluation

Cited by 30 publications

References 36 publications

Influence of Voltage on Pore Water Pressure for Soft Soil Treated with Electro-Osmosis Technique

Influence of Voltage on Pore Water Pressure for Soft Soil Treated with Electro-Osmosis Technique

Synthesis and Performance Evaluation of a Novel Nanoparticle Coupling Expanded Granule Plugging Agent

The Effect of Using Reinforced Granular Blanket and Single Stone Column on Improvement of Sandy Soil: Experimental Study

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