Vibration compaction, impact compaction and dynamic compaction are used for treatment of collapsible loess foundation in part section of Yanyu Expressway. The mechanics index change after the treatment is analyzed and compared. Reasonable application scope is summarized and put forward.%通过对阎禹高速部分路段采用振动碾压、冲击碾压和强夯三种不同技术处治湿陷性黄土地基，分析对比处治后的力学指标变化，总结并提出合理的适用范围。
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