Axial Loading Effect on the Behavior of Large Helical Pile Groups in Sandy Soil

Alwalan, Mohammed; Alnuaim, Ahmed

doi:10.1007/s13369-021-06422-9

Cited by 12 publications

(6 citation statements)

References 44 publications

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“…The accuracy of these finite element models was evaluated by comparing the results with field experiments or small-scale laboratory-modeled testing, proving an important level of consistency [17]. Helical piles bearing capacity modeling has been widely used in scientific literature [18][19][20].…”

Section: Normmentioning

confidence: 99%

An Experimental and Numerical Study on the Influence of Helices of Screw Piles Positions on Their Bearing Capacity in Sandy Soils

Simonenko,

Loya,

Rodriguez-Millan

2024

Materials

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Helical piles became a popular foundation technique, and as a result of environmental restrictions, they have become increasingly widely used. However, due to the high cost of experimentation, the influence of the number of helices and their positions on the pile-bearing capacity has not been sufficiently studied. The present study performed compression and lateral load tests on helical piles of the same diameter but with one, two, and three round helices in known sandy soil. The results from the experiments are compared with those from numerical simulations that use the mesh-free RBF method and the Winkler–Fuss approach to model how the pile and ground interact. The results are generalized to suggest an engineering equation that can predict the best pile configuration in sandy soil.

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Section: Normmentioning

confidence: 99%

An Experimental and Numerical Study on the Influence of Helices of Screw Piles Positions on Their Bearing Capacity in Sandy Soils

Simonenko,

Loya,

Rodriguez-Millan

2024

Materials

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“…Some references consider the ratio of helix diameter to shaft diameter between 2 and 3 (23)(24)(25). Most of the previous researches on helical piles have focused on the situation in which the piles are under direct loading, and by examining their geometric parameters, settlement performance and axial force distribution in the pile depth have been investigated and the results indicate that for cohesive soils, increasing the number of helices with the optimal distance of 1.5 times the diameter of the helix, by creating cylindrical shear, enhances pile's performance (26)(27)(28). The research on the behavior of helical piles in pile-supported embankments is limited, and further studies are required.…”

Section: Introductionmentioning

confidence: 99%

Numerical Studies on Performance of Helical Pile-supported Embankments Over Soft Clay

Mashayekhi,

Khanmohammadi

2024

IJE

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The need for practical and economical solutions to increase the stability of embankments and reduce their settlement is a significant issues in geotechnical engineering. An effective approach to improve the overall performance of embankment systems is using structural elements such as piles. In recent years the use of helical piles has gained consideration due to their proper performance under compressive and tensile loads, quick and easy installation, and elimination of concreting problems. This study investigates the performance of embankments supported by helical piles through a 3D numerical study using the Abaqus software. The validation was performed according to the experimental and field data provided by other researchers. Then, 3D numerical models were developed to investigate the effects of pile caps, the ratio of helix diameter to shaft diameter, the number of helices, and the optimum spacing of helices. The finite element modeling results indicated that increasing the number of helices and changing their spacing had no significant impact on controlling the settlement. It was also found that the load transfer mechanism parameters had a direct relationship with the helix dimensions and shaft diameter. Adding helices to piles increased their bearing capacity, improving parameters of the load transfer mechanism, such that the arching in a pile with three helices decreased by 40% compared to the one with one helix. The results also revealed that on average, 80% of the load imposed on a pile was sustained by the shaft, and helices had a smaller effect on the settlement of pile-supported embankments.

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“…They are frequently employed when conventional foundation techniques, like deep concrete foundations, are neither feasible nor practical [27]. The helical and granular anchor piles have proven their effectiveness in cohesive [28][29][30][31] and cohesionless soils [32][33][34][35][36][37]. They are economical, quick to install [27], and environmentally friendly, as they do not pollute the soil or water [38,39].…”

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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Axial Loading Effect on the Behavior of Large Helical Pile Groups in Sandy Soil

Cited by 12 publications

References 44 publications

An Experimental and Numerical Study on the Influence of Helices of Screw Piles Positions on Their Bearing Capacity in Sandy Soils

An Experimental and Numerical Study on the Influence of Helices of Screw Piles Positions on Their Bearing Capacity in Sandy Soils

Numerical Studies on Performance of Helical Pile-supported Embankments Over Soft Clay

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

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