Laterally Loaded Single Pile Response Considering the Influence of Suction and Non-Linear Behaviour of Reinforced Concrete Sections

Stacul, Stefano; Squeglia, Nunziante; Morelli, Francesco

doi:10.3390/app7121310

Cited by 13 publications

(8 citation statements)

References 38 publications

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“…The influence of the unsaturated soil conditions on the response of laterally loaded piles has received less attention; despite this, it is well known that the pile behaviour is largely affected by the mechanical properties of the shallower soil layer [7], which is often above the water table. To the best of the authors' knowledge, only few studies have so far addressed the relevance of the soil suction on the response of laterally loaded piles in unsaturated soils [10][11][12][13]. Stacul et al [10] implemented a BEM model accounting for soil suction and highlighted appreciable differences on the pile's response even in the case of a shallow water table (1 m depth).…”

Section: Introductionmentioning

confidence: 99%

“…To the best of the authors' knowledge, only few studies have so far addressed the relevance of the soil suction on the response of laterally loaded piles in unsaturated soils [10][11][12][13]. Stacul et al [10] implemented a BEM model accounting for soil suction and highlighted appreciable differences on the pile's response even in the case of a shallow water table (1 m depth).…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Model to Study the Response of Piles under Lateral Loading in Unsaturated Soils

et al. 2021

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The interaction between a laterally loaded pile and the surrounding soil is typically limited to the shallower soil layer. Often, this zone is above the water table and therefore the interaction takes place under unsaturated conditions. The available evidence is scarce but suggests that unsaturated conditions play a major role on the pile’s response. The actual mechanisms governing the soil–pile interaction under unsaturated soil conditions are not understood entirely, and this paper provides a useful insight on this topic. The analysis is carried out with a fully coupled three-dimensional numerical model, the soil behaviour is simulated with a Modified Cam Clay Model extended to unsaturated conditions. The model accounts for the increase in stiffness and strength of unsaturated soils as well as the volumetric collapse upon wetting. The constitutive model is calibrated on the laboratory data and validated against centrifuge data with satisfying agreement. The results highlight the substantial differences in the soil reaction against the pile depending on different water saturation profiles. The study also shows that the influence of unsaturated conditions on the pile response increases as the pile’s flexibility increases. Comparing the findings with currently available design methods such as the p–y curves, it is found that these do not adequately describe the unsaturated soil reaction against the pile, which opens the door for new research in the field. The proposed numerical model is a promising tool to further investigate the mechanisms underlying the soil–pile interaction under unsaturated soils.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Numerical Model to Study the Response of Piles under Lateral Loading in Unsaturated Soils

et al. 2021

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“…The pile material also affects the pile head displacement under the lateral load [35]. The material of the pile is generally reinforced concrete, and waste steel rails can also be used instead of steel bars.…”

Section: Different Slope Gradients Affect the Internal Force And Dispmentioning

confidence: 99%

Model Test and Numerical Simulation of Single Pile Response under Combined Loading in Slope

Zhang

Wang

et al. 2020

Applied Sciences

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Vertical loads are commonly transferred by piles primarily in the upper structures. However, lateral loads are also significant compared with vertical loads in pile foundation design. Compared with a pile on level ground, there are many particular characteristics in a pile that is on sloping ground. These characteristics depend on the combined loading and the magnitude of the soil lateral displacement. In order to investigate the pile’s bearing characteristics, a model test was conducted and ABAQUS software was adopted to conduct 3D numerical simulation of a single pile with different slope angles under combined loads. The experimental results indicated that (1) the soil pressure along the slope direction was smaller than the other side, resulting in an asymmetry of the slope soil around the pile, and in turn introducing a horizontal thrust to the pile; (2) with the increase of slope angle, the horizontal thrust increased while the single pile’s bearing capacity decreased; (3) the vertical load caused more pile horizontal displacement with the growth of slope angle; and (4) the pile’s moment and the displacement also increased with the growth of the slope angle. The findings in this study can provide a useful reference in the design of piles or anti-slide piles in sloping ground.

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“…Piles and geocells are widely used to reinforce soft foundation because they reduce soil settlement [1][2][3]. However, research on riverbank slope reinforcement using anti-slide piles with geocells is limited, and the application of geocells in engineering practice is mainly based on experience.…”

Section: Introductionmentioning

confidence: 99%

Modeling Riverbank Slope Reinforcement Using Anti-Slide Piles with Geocells

Liu

Zhou

et al. 2021

JMSE

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Geocells are increasingly used in engineering applications, but the design of riverbank slope reinforcements that use only geocells limits reinforcement performance. Moreover, the design and use of anti-slide piles with geocells are mainly based on experiences that are unsupported by theoretical models. In this paper, by combining the confinement effect and vertical action mechanism of geocells, the horizontal friction mechanism of the geocell layer and the vertical support mechanism of piles, a theoretical model of riverbank slope reinforced by anti-slide piles with geocells was constructed. In addition, to describe the mechanical behavior of a riverbank slope reinforced by anti-slide piles with geocells, the slip-resisting mechanism of the anti-slide pile with interaction between geocells and their internal filler is considered in the model. Furthermore, to investigate the influence of changes in water level on riverbank slope stability, the developed model takes into account settlement, lateral displacement, pile bending moment and pile axial force. The model predications were validated by the field measurement data. The results from a series of parametric studies show that the use of anti-slide pile and geocells can effectively reduce the settlement and the lateral displacement of a riverbank slope. The developed model could contribute to an optimal design of anti-slide pile with geocells for enhancing the stability of a riverbank slope.

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Laterally Loaded Single Pile Response Considering the Influence of Suction and Non-Linear Behaviour of Reinforced Concrete Sections

Cited by 13 publications

References 38 publications

A Numerical Model to Study the Response of Piles under Lateral Loading in Unsaturated Soils

A Numerical Model to Study the Response of Piles under Lateral Loading in Unsaturated Soils

Model Test and Numerical Simulation of Single Pile Response under Combined Loading in Slope

Modeling Riverbank Slope Reinforcement Using Anti-Slide Piles with Geocells

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