Experimental assessment of sampling disturbance in calcareous silt

Title: Experimental assessment of sampling disturbance in calcareous silt
Creator: Lim, G. T.; Pineda, J. A.; Boukpeti, N.; Fourie, A.; Carraro, J. A. H.
Relation: Geotechnique Letters Vol. 8, Issue 3, p. 240-247
Publisher Link: http://dx.doi.org/10.1680/jgele.18.00068
Publisher: ICE Publishing
Resource Type: journal article
Date: 2018
Description: A small-scale physical modelling program using particle image velocimetry and digital image correlation techniques was designed to obtain a refined understanding of the disturbance experienced by calcareous silt during tube sampling. The influence of the sampler wall thickness (diameter-to-thickness ratio, B/t) and the tube penetration rate were evaluated by estimating displacement and strain fields around the tube sampler. The results indicate that sampling with a thin tube leads to a relatively narrow undisturbed zone located at the centre of the tube, with a width slightly smaller than the tube radius. Opposite to what is suggested for soft clays, tube sampling tends to densify the calcareous silt. This aspect has an important influence on the assessment of sample quality in calcareous silt for offshore and onshore projects.
Subject: calcareous soils; sampling; silts; strain
Identifier: http://hdl.handle.net/1959.13/1403304
Identifier: uon:35152
Identifier: ISSN:2045-2543
Language: eng
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