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|Title:||Negative skin friction on single piles in a layered half-space|
|Source:||Lim, C.H.,Chow, Y.K.,Karunaratne, G.P. (1993-09). Negative skin friction on single piles in a layered half-space. International Journal for Numerical and Analytical Methods in Geomechanics 17 (9) : 625-645. ScholarBank@NUS Repository.|
|Abstract:||Settlement of the surrounding soil due to surcharge placement may give rise to negative skin friction developed in piles. In this paper, a simple discrete element approach using subgrade reaction method is proposed to analyze negative skin friction on single piles. The pile is embedded in a two-layer soil where the upper soil layer undergoes consolidation while the lower soil layer acts as a stiffer bearing stratum. Two different and uncoupled deformation modes, one at the pile shaft and the other at the pile toe have been assumed in the determination of the soil stiffness. The effects of a compressible bearing stratum and embedment length of the pile in the bearing stratum are considered in the analysis. This simple approach is verified by comparison with rigorous methods of modelling the soil as an elastic continuum. Three reported case histories are analyzed and the computed results are shown to be in reasonable agreement with the field measurements.|
|Source Title:||International Journal for Numerical and Analytical Methods in Geomechanics|
|Appears in Collections:||Staff Publications|
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