In this paper, the swelling—shrinkage propertiesof the compacted expansive soil in the Huaiyin Section of theNing-Lian Highway are introduced, and swelling-shrinkagemechanisms are discussed based on changes in soil water content,dry density, material composition and fabric. The improvement ofthe compacted expansive soil by lime is also discussed briefly. Itis concluded that careful attention should be paid to this type ofcompacted expansive soil.
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