[提要]  近十余年来发展的多种可液化地基处理加固方法中，振冲碎石桩法由于诸多优点而为首选方法，在应用方面积累了较丰富的经验。但由于问题的复杂性，对于可液化地基经过处理而形成的碎石桩复合地基的抗地震液化效果的评定和检验问题，仍然没有得到解决。作者首先对振冲地基的抗液化机理进行了深入的分析，认为该种地基的抗液化作用可分由密实效用、排水效用和桩体效用等所组成；其次对目前常用来检验和评定该种地基加固效果的方法进行了剖析，指出了各自的不足；最后提出了建立切合实际的综合检验理论和方法的新途径。
[关键词]  振冲碎石桩复合地基 抗液化机理 检验方法 液化检验理论 液化判定标准

An antiliquefaction mechanism of a composite f6undation of sand - gravel columns is analysed deeply. The author considers that the antiliquefaction function of the foundation can be devided into compact effect, drainage effect and pile effect.And then, some test or appraisal methods of the stabilization effects of the foundation are analysed deeply, and the each method's shortcoming is pointed out. The new way about how to rebuild the test theory and test method of the foundation is suggested.
Keywords: a composite foundation of sand - gravel columns; antiliquefaction mechanism; test methods; test theory; liquefaction determination criterion