Negative Skin Friction Distribution on a Single Pile - Numerical Analysis

2018 ◽  
pp. 36-48 ◽  
Author(s):  
Talal Awwad ◽  
Salma Al Kodsi ◽  
Alexey Shashkin
Keyword(s):  
Numerical Analysis ◽  
Skin Friction ◽  
Single Pile ◽  
Negative Skin Friction

Finite element analyses of negative skin friction on a single pile

2012 ◽  
Vol 7 (3) ◽  
pp. 239-252 ◽  
Author(s):  
Jinyuan Liu ◽  
Hongmei Gao ◽  
Hanlong Liu
Keyword(s):  
Finite Element ◽  
Skin Friction ◽  
Single Pile ◽  
Finite Element Analyses ◽  
Negative Skin Friction

Numerical Analysis of Negative Skin Friction for Pile under Surface Loading by Particle Flow Code

2012 ◽  
Vol 166-169 ◽  
pp. 482-486
Author(s):  
Feng Xi Zhou ◽  
Yuan Ming Lai
Keyword(s):  
Numerical Analysis ◽  
Numerical Simulations ◽  
Skin Friction ◽  
Two Dimensions ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Surface Loading ◽  
Negative Skin Friction ◽  
Pile Interaction ◽  
End Bearing Pile

Numerical simulations of soil-pile interaction under surface loading are performed by particle flow code in two dimensions. Considering an end-bearing pile subjected to flexible distribution load, the variety of negative skin friction is studied. Numerical results show that negative skin friction is variation with the increasing of surface loading, and the negative skin friction is decrease when the value is up to ultimate skin friction.

scholarly journals Numerical analysis of negative skin friction on piles in soft clay

HBRC Journal ◽  
2013 ◽  
Vol 9 (1) ◽  
pp. 68-76 ◽  
Author(s):  
Yasser M. El-Mossallamy ◽  
Ashraf M. Hefny ◽  
Magdy A. Demerdash ◽  
Mohamed S. Morsy
Keyword(s):  
Numerical Analysis ◽  
Skin Friction ◽  
Soft Clay ◽  
Negative Skin Friction

scholarly journals Downdrag Measurements on a 160-Ft Floating Pipe Test Pile in Marine Clay

1972 ◽  
Vol 9 (2) ◽  
pp. 127-136 ◽  
Author(s):  
M. Bozozuk
Keyword(s):  
Skin Friction ◽  
Compressive Load ◽  
Marine Clay ◽  
Positive Skin ◽  
Negative Skin Friction ◽  
Pore Pressures ◽  
Excess Pore Pressures ◽  
Test Pile ◽  
Excess Pore

Large negative skin friction loads were observed on a 160 ft (49 m) steel pipe test pile floating in marine clay. The test pile was driven, open-ended, on the centerline of a 30 ft (9 m) high granular approach fill on the Quebec Autoroute near Berthierville. Since the installation was made in 1966 the fill has settled 21 in. (53 cm), dragging the pile down with it. Negative skin friction acting along the upper surface of the pile was resisted by positive skin friction acting along the lower end as it penetrated the underlying clay. Under these conditions the pile compressed about [Formula: see text] (2 cm). Analysis of the axial strains indicated that a peak compressive load of 140 t developed at the inflection point between negative and positive skin friction 73 ft (22 m) below the top of the pile. Negative and positive skin friction acting on the upper surface of the pile exceeded the in situ shear strength and approached the drained strength of the soil where excess pore water pressures had dissipated. At the lower end where the positive excess pore pressures were high and relative movement between the pile and the soil was large, the positive skin friction approached the remoulded strength as measured with the field vane. Skin friction was increasing, however, as positive escess pore pressures dissipated.This paper shows that skin friction loads are related to the combination of (a) in situ horizontal effective stresses, (b) horizontal stresses due to embankment loads, and (c) horizontal stresses due to differential settlement of the fill.

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