Laboratory Model Design for Deep Soil Mixing Method

Onur, Mehmet İ̇nanç; Bıçakcı, Mert; Kardoğan, Pınar Sezin Öztürk; ERDAĞ, Ahmet; Aghlmand, Majid

doi:10.13167/2022.24.6

Cited by 3 publications

(2 citation statements)

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“…Sustainability 2023, 15, 2802 2 of 36 Some researchers have worked on improving soil behavior with special additives [14][15][16][17][18][19]. Others studied the benefits of alternative foundations, especially deep foundations, to resist the damaging effects of expansive soil [20][21][22][23][24][25]. The Department of the Army [26] highlighted the importance of foundations in expansive soils.…”

Section: Introductionmentioning

confidence: 99%

A State-of-the-Art Review and Numerical Study of Reinforced Expansive Soil with Granular Anchor Piles and Helical Piles

2023

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Expansive soils exist in many countries worldwide, and their characteristics make them exceedingly difficult to engineer. Due to its significant swelling and shrinkage characteristics, expansive soil defies many of the stabilization solutions available to engineers. Differential heave or settlement occurs when expansive soil swells or shrinks, causing severe damage to foundations, buildings, roadways, and retaining structures. In such soils, it is necessary to construct a foundation that avoids the adverse effects of settlement. As a result, building the structure’s foundations on expansive soil necessitates special consideration. Helical piles provide resistance to uplift in light structures. However, they may not fully stabilize foundations in expansive soils. A granular anchor pile is another anchor technique that may provide the necessary resistance to uplift in expansive soils using simpler methods. This review and numerical study investigate the fundamental foundation treatments for expansive soils and the behavior of granular anchors and helical piles. Results indicate that granular anchor piles performed better than helical piles for uplift and settlement performance. For heave performance, the granular anchor and helical piles perform nearly identically. Both achieve heave reductions greater than 90% when L/H > 1.5 and D = 0.6 m.

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Section: Introductionmentioning

confidence: 99%

A State-of-the-Art Review and Numerical Study of Reinforced Expansive Soil with Granular Anchor Piles and Helical Piles

2023

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“…Several researchers explored the possibility of enhancing soil behavior by using special additives [12][13][14][15][16][17]. Additionally, some investigated the potential of alternative foundation designs, particularly deep foundations, to mitigate the negative effects of the expansive soil [18][19][20][21][22][23]. The Department of the Army emphasized the significance of foundations in expansive soils and advised opting for cost-effective foundations to reduce structural damage and differential movement between structural elements [24].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Helical Piles and Granular Anchor Piles for Foundation Stabilization in Expansive Soil: A 3D Numerical Study

2023

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This study investigates the performance of granular anchor piles and helical piles in expansive soils. Expansive soils pose challenges for engineering due to their significant swelling and shrinkage characteristics. Special considerations are required for constructing foundations on expansive soil to mitigate volumetric changes. While helical piles provide uplift resistance in light structures, they may not fully stabilize foundations in expansive soils. In contrast, granular anchor piles offer a simpler alternative for resisting uplift forces. A numerical study was conducted to analyze the pullout loads, compressive loads, and heave behavior of these anchor techniques. The results demonstrate that granular anchor piles outperform helical piles in terms of pullout and compressive performance, with improvements ranging from 17% to 22.5% in pullout capacity and 0.5% to 19% in compressive capacity, depending on specific pile lengths and diameters examined. However, both techniques show similar effectiveness in reducing heave, achieving reductions of over 90% when specific conditions are met. Additionally, the use of high-rise cap piles contributes to significant heave reduction, effectively minimizing heave to nearly negligible levels compared to low-rise cap piles. It is found that the relative density of the granular material has a more pronounced effect on the pullout load compared to the compressive load, and its impact varies depending on the length of the pile. Therefore, it is recommended to avoid high relative density when the pile is entirely within the expansive soil while utilizing higher relative density is beneficial when the pile penetrates and settles in the stable zone.

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Enhancing the seismic performance of highway embankments on soft soils: a comparative study of conventional and T-shaped deep cement mixing columns

Aissaoui,

Boufarh,

Djellali

et al. 2024

SEES

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Weak soils globally pose significant challenges in highway construction under seismic conditions, causing instability issues such as settlements and slope failures. This poses challenges for geotechnical engineers to design safe, effective, and economical construction methods for stable slopes. Despite the critical nature of embankment stability under dynamic conditions, there is a lack of research investigating the effects of foundation soil reinforcement in such scenarios. This paper aims to study the seismic behavior of two soil improvement techniques: conventional Deep Cement Mixing (DCM) columns and T-shaped Deep Cement Mixing (TDM) columns. A three-dimensional numerical model was used to investigate the dynamic behavior of DCM and TDM column-supported embankments using PLAXIS 3D software. After validating the numerical model, a parametric study was conducted to understand the seismic performance of embankments with DCM and TDM columns over soft soil. The obtained results demonstrate that, under seismic loading conditions, both DCM and TDM columns substantially enhance embankment stability. However, TDM columns exhibit superior performance, consistently achieving greater efficacy in mitigating settlement and controlling displacement compared to their DCM counterparts.

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Laboratory Model Design for Deep Soil Mixing Method

Cited by 3 publications

References 0 publications

A State-of-the-Art Review and Numerical Study of Reinforced Expansive Soil with Granular Anchor Piles and Helical Piles

A State-of-the-Art Review and Numerical Study of Reinforced Expansive Soil with Granular Anchor Piles and Helical Piles

Comparative Analysis of Helical Piles and Granular Anchor Piles for Foundation Stabilization in Expansive Soil: A 3D Numerical Study

Enhancing the seismic performance of highway embankments on soft soils: a comparative study of conventional and T-shaped deep cement mixing columns

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