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[提要]  近十余年來(lái)發(fā)展的多種可液化地基處理加固方法中，振沖碎石樁法由于諸多優(yōu)點(diǎn)而為首選方法，在應(yīng)用方面積累了較豐富的經(jīng)驗(yàn)。但由于問(wèn)題的復(fù)雜性，對(duì)于可液化地基經(jīng)過(guò)處理而形成的碎石樁復(fù)合地基的抗地震液化效果的評(píng)定和檢驗(yàn)問(wèn)題，仍然沒(méi)有得到解決。作者首先對(duì)振沖地基的抗液化機(jī)理進(jìn)行了深入的分析，認(rèn)為該種地基的抗液化作用可分由密實(shí)效用、排水效用和樁體效用等所組成；其次對(duì)目前常用來(lái)檢驗(yàn)和評(píng)定該種地基加固效果的方法進(jìn)行了剖析，指出了各自的不足；最后提出了建立切合實(shí)際的綜合檢驗(yàn)理論和方法的新途徑。
[關(guān)鍵詞]  振沖碎石樁復(fù)合地基 抗液化機(jī)理 檢驗(yàn)方法 液化檢驗(yàn)理論 液化判定標(biāo)準(zhǔn)

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