Intelligent compaction technology has been widely applied in the compaction construction of roads due to its advantages in real-time and comprehensive assessment of compaction quality.Howev-er,research on its application to lime-treated soil subgrades is currently lacking.Based on a coastal highway construction project,intelligent compaction field experiments on lime-treated soft soil sub-grades were conducted and the compaction degree and CBR values were measured.The correlation be-tween the intelligent compaction index Evib and the compaction degree and CBR values was analyzed,obtaining the variation patterns of compaction degree,CBR,and Evib with the number of rolling pas-ses.The results indicate that there is a significant correlation between Evib and the compaction degree,with correlation coefficients of 0.73.Thus,the Evib contour maps can be used to rapidly identify weak areas in subgrade compaction.Specifically,for lime-treated soft soil subgrades with a loose paving depth of 30 cm,two passes of vibratory rolling are sufficient to achieve optimal compaction effects.
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