On the behaviour of pile groups under combined lateral and vertical loading

Hazzar, Lassaad; Hussien, Mahmoud N.; Karray, Mourad

doi:10.1016/j.oceaneng.2017.01.006

Cited by 45 publications

(12 citation statements)

References 27 publications

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“…Hence, this will result in a considerable decrease in the lateral load capacity. This trend is similar to that presented by Rajagopal and Karthigeyan ( 2008 ) and Hazzar et al ( 2017 ).…”

Section: Analysis Of Resultssupporting

confidence: 92%

The effect of combined loading on the behavior of micropiled rafts installed with inclined condition

Elsawwaf

Nazir

Azzam

2022

Environ Sci Pollut Res

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One of the major disadvantages of micropiles is their low lateral stiffness and flexural rigidity due to the small diameter. This limitation can be handled in current practice, by installing the micropile with inclined condition or providing a steel casing. Additional steel casings will increase the lateral load capacity of micropiles but increase the project cost as well. Thus, inclination of micropile which is relatively simple and cheap is recommended. In this paper, a comprehensive numerical analysis is conducted on the behavior of micropiled rafts installed with inclined condition under combined vertical and lateral loading. A FEM calibrated against full-scale axial and lateral field tests is used to conduct the analysis. The soil profile is soft clay soil underlain by a layer of dense sand. The study investigates the impact of several parameters which are as follows: magnitude of vertical loading, reinforcement type, inclination angle of micropiles, and number of inclined micropiles. The study reveals that increasing vertical loads causes continuous decrease in the lateral load capacity of micropiled rafts. When all micropiles installed are inclined, the positively inclined micropiles carry 79–86% of the total lateral load carried by micropiles, whereas the negatively inclined ones carry 14–21%. Inclined micropiles offer greater lateral load sharing ratio (αh) than that of vertical ones, largest at θ = 45°. The effect of micropile reinforcement on improving the lateral performance is low compared to the effect of micropile inclination angle.

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“…Hence, this will result in a considerable decrease in the lateral load capacity. This trend is similar to that presented by Rajagopal and Karthigeyan ( 2008 ) and Hazzar et al ( 2017 ).…”

Section: Analysis Of Resultssupporting

confidence: 92%

The effect of combined loading on the behavior of micropiled rafts installed with inclined condition

Elsawwaf

Nazir

Azzam

2022

Environ Sci Pollut Res

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“…The undrained modulus, Es, was taken as 7qc (qc = CPT tip resistance) (Bowles, 2012), which is approximately equal to 361cuc. Overall, the values of cuc and Es were consistent with other studies (cuc=27-40 kPa, Es=9.7-15 Mpa or 359cuc-375cuc) (Hazzar et al, 2017(Hazzar et al, , 2013Hussien et al, 2010) where the layered soil profile at the same site was explicitly modeled. The soil-pile interface was simulated with a pressureoverclosure model in the normal direction and a Coulomb model with a friction coefficient of 0.5 in the tangential direction (Achmus and Abdel-Rahman, 2005;Khodair and Abdel-Mohti, 2014;Nicholas, 2014).…”

Section: Baseline No-scour Modelsupporting

confidence: 89%

“…The side boundaries were set at a distance of 20D from the nearest edge of the pile group (Feng et al, 2016;Hazzar et al, 2017) while the bottom boundary (i.e., model base) was 10D below the pile tip (Lin and Lin, 2020). A total of 87012 elements were generated in the baseline FE model.…”

Section: Baseline No-scour Modelmentioning

confidence: 99%

Evaluation of vertical effective stress and pile tension capacity in sands considering scour-hole dimensions

Lin

Jiang

2019

Computers and Geotechnics

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“…Thus, the lateral response of pile foundation is also essential in the designing of structures where lateral dynamic loads exist. Unlike the axial load capacity of a pile, the determination of its lateral load capacity is much more complicated because the soil-pile interaction affects the pile deflection [3,4].…”

Section: Introductionmentioning

confidence: 99%

Impact of Pile Punching on Adjacent Piles: Insights from a 3D Coupled SPH-FEM Analysis

2020

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Pile punching (or driving) affects the surrounding area where piles and adjacent piles can be displaced out of their original positions, due to horizontal loads, thereby leading to hazardous outcomes. This paper presents a three-dimensional (3D) coupled Smoothed Particle Hydrodynamics and Finite Element Method (SPH-FEM) model, which was established to investigate pile punching and its impact on adjacent piles subjected to lateral loads. This approach handles the large distortions by avoiding mesh tangling and remeshing, contributing greatly high computational efficiency. The SPH-FEM model was validated against field measurements. The results of this study indicated that the soil type in which piles were embedded affected the interaction between piles during the pile punching. A comprehensive parametric study was carried out to evaluate the impact of soil properties on the displacement of piles due to the punching of an adjacent pile. It was found that the interaction between piles was comparatively weak when the piles were driven in stiff clays; while the pile-soil interactions were much more significant in sandy soils and soft clays.

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On the behaviour of pile groups under combined lateral and vertical loading

Cited by 45 publications

References 27 publications

The effect of combined loading on the behavior of micropiled rafts installed with inclined condition

The effect of combined loading on the behavior of micropiled rafts installed with inclined condition

Evaluation of vertical effective stress and pile tension capacity in sands considering scour-hole dimensions

Impact of Pile Punching on Adjacent Piles: Insights from a 3D Coupled SPH-FEM Analysis

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