Comparative performance of loose sandy soils improved by deep compaction techniques
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Date
2005-11
Authors
Ahmad @ Majid, Mohd Farid
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Abstract
The objectives of the study were to determine the effect of fine content
on the improvement of cohesionless loose sandy soils, to evaluate and
compare the effectiveness of the dynamic compaction and vibro-compaction
techniques, to provide suitable semi empirical models on improvement and
finally to propose a suitable comparative performance chart that can help select
the technique that provided higher improvement. The research was conducted
at study sites in Kerteh, Terengganu. Based on improvements made, it was
found that the increase in soil resistances after completion of treatment differs
between the two techniques. Extensive soil samples were then collected using
specially fabricated sampling tube, and wet sieve grading analyses on the soils
were performed in the laboratory to determine the difference in fine content.
Models were then developed to determine the relations between improvement
against soil resistance. Cubic semi-empirical models were found to be the best
models for both dynamic compaction and vibro-compaction. The models
allowed direct usage of the cone resistance to evaluate the performance of the
deep compaction technique incorporating the effect of fine content. The models
were then used to produce a suitable comparison chart that can assist
engineers in designing the compaction techniques.
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Keywords
Loose sandy soils improved , Deep compaction techniques