In order to address the compaction challenges arising from the high moisture content of over-wet glacial de-posit soil(OGDS),lime was utilized as a soil stabilizer during subgrade construction,along with specific compaction tech-niques,to facilitate roadbed construction.This research investigated the deformation characteristics of vibratory compac-tion in the loose layer of OGDS with varying lime content ratios through numerical simulations.Field experiments were conducted to validate the simulation outcomes.Drawing insights from the compaction deformation patterns of the im-proved loose layer of OGDS,numerical investigations were undertaken to analyze the compaction deformation characteris-tics of different loose layer thicknesses concerning the compaction pass count.The optimal lime content ratio and corre-sponding construction parameters for roadbed construction are determined.The results show that for loose layer thicknes-ses exceeding 40 cm,lime mixing effectively accelerates the settlement stabilization rate during vibratory compaction.For embankment fill material improvement,a lime mixing ratio of 6％can be selected,whereas roadbeds with stringent com-paction requirements necessitate an 8％lime mixing ratio for soil improvement during construction.Employing a static compaction machine with a minimum pressure of 25 tons for at least 6 compaction passes is essential to meet the compac-tion specifications.
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