The effects of the method of installation of cen- trifuge model sired compaction piles (SCPs) in soft clay are studied. The comparative study involves the frozen pile method, a I-g dis- placement method, and a high-g displacement method. The results show that. although all the SCP-improved models exhibit higher strength compared to the unimproved models, both displacement methods confer additional enhancement in strength to ground im- provement, which was not present in the frozen pile models. In ad- dition, wavy settlement patterns were also observed in the frozen pile models, but not in the displacement models. The observed dif- ferences were explained by the postulated differences in stress states of the improved models.
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