Increase in SPT N‐Values Due to Displacement Piles
Publication: Journal of Geotechnical Engineering
Volume 109, Issue 1
Abstract
A technique that was used to estimate the safety factor against liquefaction by predicting the increase in SPT N-values due to driving of displacement piles in sand is presented. The prediction method involved applying previously-developed relations between relative density, grain-size distribution, overconsolidation ratio, effective stress and N-values to evaluate the relative density of site sands prior to pile-driving. Similar relations were applied to calculate increased N-values from increased relative density due to volume displacement and lateral stress increase from pile-driving. The predicted N-values were subsequently verified by carefully-controlled field penetration testing.
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Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 109 • Issue 1 • January 1983
Pages: 108 - 113
Copyright
Copyright © 1983 ASCE.
History
Published online: Jan 1, 1983
Published in print: Jan 1983
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