[提要]  挤土桩在沉桩过程中会产生明显的挤土效应，应用圆柱孔扩张理论可推导出桩周土体在打桩过程中
产生的径向位移。挤土效应也可用来处理桩位的偏移，通过合理布置桩数和排数，使桩产生需要的反向位移。工程实例表明，理论计算与实测结果吻合程度较好。
[关键词]  挤土效应  塑性区  桩位偏移

Compacting effect is caused in the constructing process of compaction pile, the displacement of soil around piles can be deduced with the column cavities method. Compacting effect can also be used to treat deviation of piles caused by driving piles. According to a practical project, the results of practical test is basically identical with results of calculation.
Keywords: compacting effect; plastic zone; deviation; pile