Geosynthetics August/September 2022 - 25
and wick drain installation depth. Postinstallation
CQA inspections were completed,
including final walk-through
inspections and spot-checks of potential
non-conformances identified following the
review of the CQC data (such as wick drain
spacing issues or missing installations).
Daily CQA reports were prepared
summarizing the construction activities,
weather conditions, identified
potential issues and non-conformances.
Photographs were taken daily to document
construction activity performed by
the earthworks and wick drain contractors.
Conclusions
A literature review of wick drain ground
improvement papers indicates that most
of the documents are related to the theoretical
aspects of wick drain design, with
little to no consideration of aspects associated
with field conditions. A practical
document summarizing construction
considerations is not readily available.
Part 1 of this paper provides details on
the construction of a very large wick drain
project carried out in North America.
Special attention has been provided on
the construction considerations of the
wick drain installation and construction
quality control and construction quality
assurance to ensure that the wick drains
performance would be in accordance
with the design. Instrumentation monitoring
was also carried out to check the
performance of the wick drains during
and following the stockpile construction.
References
Etezad, M., Riddell, B., Bocking, K., Becker, D, Hamdani,
A., Buchanan, P., and DaSilva, F. (2019). " Interpretation
and analysis of a test embankment in soft clay. " The
72nd Canadian Geotechnical Conf., St. John's, Canada.
Leps, T. M. (1970). " Review of the shearing strength of
rockfill. " Journal of the Soil Mechanics and Foundations
Division, ASCE, 96(4), 1159-1170.
Ontario Provincial Standard Specification (OPSS) 220.
(2014). " Construction specification for wick drain
installation, " OPSS, Ont., Canada. G
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