Improved Pile Geometry to Reduce Negative Skin Friction on Single Driven Pile and Pile Groups Subjected to Lateral Loads

Shawky, Omar; Altahrany, Ayman; Elmeligy, Mahmoud

doi:10.1007/s10706-022-02165-y

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…This paper is dedicated to studying the effect of the lateral loads of the values of the NSF induced along the pile length and the consequent drag load on both circular and square piles and pile group. An improvement of the pile cross section was made to reduce the NSF on piles, either laterally loaded piles or not laterally loaded piles, and it succeeded in reducing the NSF (97 %) [15]. This paper is considered as an extension to the study mentioned in Shawky et al [15] to cover the effect of lateral load on the NSF behaviour.…”

Section: Introductionmentioning

confidence: 90%

“…An improvement of the pile cross section was made to reduce the NSF on piles, either laterally loaded piles or not laterally loaded piles, and it succeeded in reducing the NSF (97 %) [15]. This paper is considered as an extension to the study mentioned in Shawky et al [15] to cover the effect of lateral load on the NSF behaviour. In this study, the focus was on the square piles as replacement of circular pile as they effectively reduced the NSF with approximately 60%.…”

Section: Introductionmentioning

confidence: 90%

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Study of Lateral Load Influence on Behaviour of Negative Skin Friction on Circular and Square Piles

Shawky

Altahrany²,

Elmeligy³

2022

Civ Eng J

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Negative skin friction developed on the pile surface causes many problems when piles are built in fully saturated clay. In this work, a study of NSF on a square cross-section pile corresponding to the circular pile circumference was developed. The pile was modeled as a concrete element, embedded and fully contacted with fully saturated soft clay. The clay layer is supported on a sand layer as a sub-base using ABAQUS software, and the NSF was developed on piles due to the consolidation of the clay over a 5-year period. A square pile has been found to provide lower NSF values than a round pile. Then, for the first investigation, both piles were loaded with lateral loads at the top to investigate the effect of the horizontal load on the NSF values, as there is no literature or study done on this point. The results emphasized that lateral loads reduce the NSF developed on piles. A parametric study was performed to investigate the parameters affecting the NSF values induced on piles, such as soil permeability, ballast, and lateral load values. It was concluded that square piles provide better NSF values than round piles for both single piles and pile groups. Doi: 10.28991/CEJ-2022-08-10-08 Full Text: PDF

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 90%

Study of Lateral Load Influence on Behaviour of Negative Skin Friction on Circular and Square Piles

Shawky

Altahrany²,

Elmeligy³

2022

Civ Eng J

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3D Numerical Modeling of Negative Skin Friction Effects on Tapered Piles in Soft Soils

Alielahi,

Rad,

Derakhshan

2024

Indian Geotech J

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Experimental study on negative skin friction characteristics of double-sleeve pile

Lu,

Yang,

Xianpeng

et al. 2024

Sci Rep

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Pile foundation structures are widely used in the construction of high-piled wharves in coastal soft soil areas due to their excellent adaptability to such environments. However, the extensive, deep backfilling involved in constructing these wharves can easily induce negative skin friction (NSF) on the piles, resulting in safety issues such as excessive settlement during the service life of the structures. This paper presents an indoor model experiment to examine the distribution of the THE NSF under varying pile-top loads and surcharge effects on single pile and double-sleeve pile foundations. The potential of double-sleeve pile foundations to mitigate the NSF was also explored. The results show that the axial force within the double-sleeve pile’s protected section remains essentially stable, though it is affected by the surface surcharge in the unprotected section. Time effect is exhibited both for the axial force and the NSF, gradually increasing over time. Compared to single piles, double-casing pile foundations can effectively isolate the down drag load caused by surrounding soil settlement, thereby reducing or eliminating the NSF on the pile sides.

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Improved Pile Geometry to Reduce Negative Skin Friction on Single Driven Pile and Pile Groups Subjected to Lateral Loads

Cited by 4 publications

References 13 publications

Study of Lateral Load Influence on Behaviour of Negative Skin Friction on Circular and Square Piles

Study of Lateral Load Influence on Behaviour of Negative Skin Friction on Circular and Square Piles

3D Numerical Modeling of Negative Skin Friction Effects on Tapered Piles in Soft Soils

Experimental study on negative skin friction characteristics of double-sleeve pile

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