Assessment of the postcompaction fill characteristics at the Penrith Lakes development site
The quality of compaction during construction is usually evaluated based on the minimum interval of deviation from the key parameters previously established in the laboratory (i.e., the maximum dry unit weight and optimum moisture content, OMC). Although quality control using these criteria has been well established, adopting methods such as sand cone and nuclear gauge means that areas of insufficient compaction that lead to poor fill performance (e.g., differential settlements, bearing capacity) can still occur due to its localized nature and limited depth of investigation. Conversely, alternative cost-effective geophysical methods can cover large surface areas and higher depths in arelatively short time.
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