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一、前言在室内振动三轴仪上进行砂土液化试验确定砂土的抗液化强度,是判断现场砂基是否会发生液化的方法之一。室内测定某一特定的砂性土的抗液化强度时,通常要考虑的因素有:(1)砂土试样成型的条件(主要是试样的密实度状态);(2)施加于试样的应力条件(即作用于试样周围的固结应力大小、固结应力比及所施加的应力路线);(3)确定抗液化强度时所选用的破坏标准,采用初始液化标准(孔隙压力等于周向压力)或应变标准。从液化试验实践中认识到,在众多的影响因素中,固结应力比是一个非常重要
I. INTRODUCTION Determining the liquefaction resistance of sand by measuring the sand liquefaction on an indoor vibratory triaxial apparatus is one of the methods to determine whether the sand base will liquefy at the site. When determining the liquefaction resistance of a particular sandy soil in a room, the following factors are generally considered: (1) the conditions for forming the sand sample (mainly the compactness of the sample); (2) applying to the sample The stress conditions (ie, the magnitude of the consolidation stress acting on the specimen, the ratio of the consolidation stress, and the stress path applied); (3) The failure criteria selected for the determination of the resistance to liquefaction, using the initial liquefaction criterion (pore pressure equal to Circumferential pressure) or strain criteria. From the practice of liquefaction experiments, it is recognized that among many influencing factors, the consolidation stress ratio is very important.