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Negative skin friction on pile groups
Author(s) -
Chow Y. K.,
Chin J. T.,
Lee S. L.
Publication year - 1990
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610140202
Subject(s) - terzaghi's principle , pile , geotechnical engineering , consolidation (business) , slippage , stiffness , parasitic drag , stratum , structural engineering , parametric statistics , neutral plane , geology , settlement (finance) , engineering , pore water pressure , mathematics , computer science , statistics , accounting , boundary layer , aerospace engineering , world wide web , business , payment
A numerical procedure is presented for the downdrag analysis of group piles which penetrate a consolidating upper soil layer to socket into a firm bearing stratum of finite stiffness. The settlement of the consolidating upper soil layer under a surcharge load is estimated using Terzaghi's one‐dimensional consolidation theory. Parametric solutions are presented to show the influence of various parameters on the performance of the socketed pile groups in terms of the development of the induced downdrag forces and associated pile head settlements. In general, pile–soil–pile interaction has the beneficial effect of reducing the downdrag forces and settlements of the group piles when compared to the corresponding single pile values, provided that the soil settlements are not so large as to cause full slippage at the interface in all the piles. Reasonable agreement is obtained between the theoretical and experimental results for pile groups subjected to negative skin friction.