Numerical study on bearing capacity of single stone column

Ng, Kok Shien

doi:10.1186/s40703-018-0077-z

Cited by 12 publications

(3 citation statements)

References 11 publications

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“…E. T, 1995). Furthermore, additional research has identified three distinct failure modes for single columns: shearing failure, bulging failure, and general punching failure, with notable contributions from Debbabi et al (2020), Ng (2018), and Yousfi et al (2023.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of the effectiveness of recycled aggregates in reinforcing soft soil with granular columns

Yousfi,

Guettala,

Farik

et al. 2024

SEES

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In recent years, the civil engineering field has increasingly focused on recycled aggregates due to the dwindling availability of natural aggregates and the high carbon footprint associated with their extraction and use. The use of recycled aggregates aims to decrease energy consumption and lessen the environmental impact caused by construction waste. This study illustrates the value of utilizing recycled aggregate materials for soil reinforcement and demonstrates their efficiency compared to natural aggregates. The research employs several numerical simulations carried out using PLAXIS 3D, a finite element software renowned for its advanced modeling capabilities. These simulations leverage the Mohr-Coulomb failure criteria alongside an elastic-perfectly plastic behavior model to assess the performance of various materials under different conditions. Specifically, the study investigates three types of granular columns—Ordinary Stone Columns (OSC), Sand-Fiber Mix (SFM), and Recycled Aggregate Porous Concrete Piles (RAPP)—to reinforce a unit cell model of soft soil under failure loading scenarios. Detailed analysis reveals that recycled aggregate columns exhibit a significantly higher bearing capacity, showing an improvement of up to three times that of columns made with natural aggregates. This superior performance is attributed to the enhanced mechanical properties and better load distribution capabilities of the recycled aggregates. The results are presented through load-settlement curves, which provide a clear visualization of the effectiveness of each type of granular column. Furthermore, the study highlights the practical implications of using recycled aggregates in soil reinforcement projects. The substantial improvements in bearing capacity demonstrated by the recycled aggregate columns underscore their potential as a viable and sustainable alternative to natural aggregates in various geotechnical applications.

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Section: Introductionmentioning

confidence: 99%

Numerical modeling of the effectiveness of recycled aggregates in reinforcing soft soil with granular columns

Yousfi,

Guettala,

Farik

et al. 2024

SEES

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“…Whenever reinforced soft soil supports a transport infrastructure such as the railways or highways, the ground surface is subjected to cyclic loads apart from the usual static loads imposed by the regular traffic [14][15][16]]. Significant experimental and numerical studies on stone column reinforced soft soil behavior were done in the recent past [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Load-Settlement Characteristics of Stone Column Reinforced Soft Marine Clay Deposit: Combined Field and Numerical Studies

Basack

Nimbalkar

2023

Sustainability

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Foundations supporting infrastructure built on soft and compressible marine soil are unlikely to sustain due to possibility of undrained shear failure or excessive settlement of the supporting soil. This necessitates the importance of implementing an adequate ground improvement strategy. Among different techniques, soft soil reinforcing by the installation of stone columns is one of the most successful methods in terms of long-term stability of foundations. To investigate the load-settlement characteristics of such reinforced soil, a group of closely spaced stone columns was constructed at a location along the eastern coast of Australia. The site geology revealed thick layers of soft, compressible marine clay deposit. These stone columns were loaded by constructing earthen embankment and the resulting load-settlement characteristics were measured by an array of sensors. A two-dimensional plane strain analysis was performed using finite element modeling simulations. Comparison of numerical results with the field data demonstrated accuracy of the numerical model. Additional studies were carried out to investigate the efficiency of the model. This paper integrates the new findings from the full-scale field study and advanced numerical simulations while drawing pertinent conclusions.

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“…Ng [22] conducted three-dimensional numerical modeling of stone columns to determine the bearing capacity of a single stone in soft soil and concluded that bearing capacity of the stone column was influenced by friction angle of the column and surrounding soil. The combination of bulging and punching failure was reported in a single column.…”

Section: Introductionmentioning

confidence: 99%

Laboratory and numerical based analysis of floating sand columns in clayey soil

et al. 2019

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The inclusion of sand columns results in enhancing the bearing capacity of clayey soil, increase the rate of consolidation, presentation of liquefaction in loose sandy soils and provide lateral resistance against the horizontal movement. This research aims at investigating the effects of floating columns in clayey soil with silty deposits by developing small scale laboratory models. The effects of sand columns on soils of different shear strengths, slenderness ratio (L/D) of columns were investigated. Group effect was also investigated by varying spacing between the columns. Experimental results were compared with the numerical analysis results. A 15-noded triangular mesh was generated using a finite element tool PLAXIS 2D. Finite element analysis was performed using Mohr's Coulomb's criterion considering undrained analysis for soft clayey soil and drained analysis for sand columns. It was concluded that the sand columns can significantly increase the ultimate loading capacity of soft soils. Results show that critical length for floating column ranges from 4 to 5.5 times the diameter of the column, beyond which bulging occurs and loading capacity decreased. The effect of group was also investigated and observed that with high spacing between the sand columns, the group efficiency decreased. The axial capacity of sand columns decreases while increasing spacing between the columns.

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Numerical study on bearing capacity of single stone column

Cited by 12 publications

References 11 publications

Numerical modeling of the effectiveness of recycled aggregates in reinforcing soft soil with granular columns

Numerical modeling of the effectiveness of recycled aggregates in reinforcing soft soil with granular columns

Load-Settlement Characteristics of Stone Column Reinforced Soft Marine Clay Deposit: Combined Field and Numerical Studies

Laboratory and numerical based analysis of floating sand columns in clayey soil

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