Equivalent ‘smear’ effect due to non-uniform consolidation surrounding a PVD

This paper investigated the effect of non-uniform consolidation within a prefabricated vertical drain (PVD) unit cell on the average degree of consolidation through laboratory model tests and finite-element analysis. By considering the permeability (k) changing with the void ratio (e), the results o...

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Bibliographic Details
Published in:Géotechnique 2017-05, Vol.67 (5), p.410-419
Main Authors: Zhou, Y., Chai, J. C.
Format: Article
Language:English
Subjects:
Analysis
Consolidation
Equivalence
Finite element analysis
Finite element method
Laboratories
Mathematical models
Permeability
Prefabrication
Smear
Unit cell
Vertical drains
Void ratio
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Summary:This paper investigated the effect of non-uniform consolidation within a prefabricated vertical drain (PVD) unit cell on the average degree of consolidation through laboratory model tests and finite-element analysis. By considering the permeability (k) changing with the void ratio (e), the results of the finite-element analysis showed that the effect of non-uniform consolidation has a considerable effect on the average degree of consolidation of a PVD unit cell. Further laboratory model tests of a PVD unit cell were conducted, and analyses of the model test results confirmed the effect of non-uniform consolidation. Finally, a method of considering the effect of non-uniform consolidation for the analysis of PVD-induced consolidation was established with an equivalent ‘smear’ effect concept.
ISSN:0016-8505
1751-7656
DOI:10.1680/jgeot.16.P.087