Combining with some project in the collapsible loess areas,introduces the trial pile scheme for the treatment of culvert foundation with the lime-soil compaction pile,analyzes its foundation treatment effect from the loading capacity and compaction effect,points out the lime-soil compaction pile can effectively eliminate the collapsibility of the loess and achieve the regulation and demands for the foundation treatment.%结合湿陷性黄土地区某工程实例，介绍了灰土挤密桩处理涵洞地基的试桩方案，并从承载力与挤密效果两方面，分析了其地基处理效果，指出灰土挤密桩可有效消除黄土的湿陷性，达到地基处理规范和设计的要求。
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