Theory and modelling of negative skin friction on a pile in soil

Siegel, Timothy C.; Lucarelli, Augusto

doi:10.1080/19375247.2017.1288883

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…It was realized that very small soil settlements were adequate to activate skin resistance. Consistent with the results of long-term monitoring, it was demonstrated that negative skin friction was developed in all piles due to soil settlement coupled with installation effects, consolidation under the sustained (head) load, and/or any other causes (Siegel and Lucarelli 2017). Dey and Koch investigated the effect of pile driving on the position of the neutral plane.…”

Section: Introductionmentioning

confidence: 57%

Studying the Effects of Negative Skin Friction on Single Piles in Basrah Governorate

Al-Battat¹,

Al-Jubair²,

Jassim³

et al. 2022

IJCE

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The finite element method capable of simulating the behavior of deep foundations subjected to negative skin friction in Basrah soil is investigated. Single piles under drag forces are analyzed using the PLAXIS program with an axisymmetric model. Linear elastic, Soft Soil and Mohr-Coulomb constitutive relations are adopted, where higher order triangular element is chosen for pile and soil clusters. Both pile and soil are modeled using (15)-node triangular elements. Three sites in Basrah province (Umm Qasr Port, Khor Al-Zubair, and Shatt AlArab Hotel) were selected to perform this study. The soil profile and layer characteristics are obtained from the soil investigation reports. Where the negative skin friction is evaluated due to filling loads. It is Conclusion that Small relative displacements are necessary to activate the negative skin friction. The elastic shorting for pile effect negative skin friction, due to increase relative displacement. The elastic shorting of the driven pile is more than that of the bored pile due to the less cross-sectional area of the driven pile. The results revealed proportional relation between the developed drag forces and pile section dimensions, interface friction factor, and fill height, with a maximum effect on the section dimension and minimum effect on the interface factor. The locations of neutral points are not sensitive to the above-mentioned factors.

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Section: Introductionmentioning

confidence: 57%

Studying the Effects of Negative Skin Friction on Single Piles in Basrah Governorate

Al-Battat¹,

Al-Jubair²,

Jassim³

et al. 2022

IJCE

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show abstract

“…After long-term monitoring, Fellenius found that all piles in soil experienced NSF and a small relative movement was sufficient to develop NSF [2]. There are important fundamental differences in the behavior of piles with NSF compared to piles without it that affect the structural and geotechnical design [3]. On the one side, the dragload induced by NSF drags the pile downward such that the settlements exceed the serviceability constraints by design; on the other side, in some specific cases, the structural strength of the pile is exceeded.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Influence Factors of Negative Skin Friction on PHC Pile in High-Backfill Sites

Xiong

Pan

et al. 2022

Front. Phys.

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It is recognized that NSF on a pile affects the structural and geotechnical design. The formation of NSF on a pre-stressed high-strength concrete (PHC) pile under a control building in a Vietnamese project was investigated using a verified numerical model in FLAC3D. The height of backfills, the consolidation degree of soil, working loads on the PHC pile, and the pile diameter were analyzed in sensitivity analyses to investigate the influence on NSF. It was found that higher backfills and higher consolidation degree were dominant in the formation of NSF, causing an increase of the dragload and an upward movement of the neutral plane. The working load and the pile diameter affected the dragload and the position of the neutral plane less. A limit decrease of the dragload induced by NSF was observed when the working load increased. Accelerating the soil consolidation process would be suggested to avoid great displacement due to NSF.

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Theory and modelling of negative skin friction on a pile in soil

Cited by 2 publications

References 8 publications

Studying the Effects of Negative Skin Friction on Single Piles in Basrah Governorate

Studying the Effects of Negative Skin Friction on Single Piles in Basrah Governorate

Analysis of Influence Factors of Negative Skin Friction on PHC Pile in High-Backfill Sites

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