饱和砂土的剪切波速与抗液化强度相关性研究  

Study of correlation between the shear wave velocity and the liquefaction resistance of saturated sands

作　　者：王建华[1] 程国勇[2] 

机构地区：[1]天津大学岩土工程研究所,天津300072 [2]中国民航学院,天津300300

出　　处：《岩土工程学报》2005年第4期369-373,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家"863"资助项目(2002AA615080);天津自然科学基金资助项目(023607511)

摘　　要：依据扭剪振动原理,开发出剪切波速与振动三轴联合试验装置。进而针对取自20 多个工程场地、埋深在20 m 以内的12种大量原状砂土,分析了同一类土、在同一固结压力作用下,原状与重塑土样抗液化强度与其初始剪切波速之间的相关性。结果表明,当判别液化的应变标准不超过6%时,土的抗液化强度与其初始剪切波速之间存在良好的对应关系。当应变破坏标准超过6%,土的初始剪切波速与抗液化强度之间不具备唯一对应关系。A new combined test apparatus is developed on torsion vibration principle, which can be used to measure shear-wave velocity and to determine cyclic liquefaction resistance of soil specimen simultaneously. The relation between the shear wave velocity and the cyclic liquefaction resistance is analyzed for a lot of undisturbed and remolded specimens of same kind of sand with same consolidation pressure, which are taken from more than 20 sites within the depth of 20 m under ground surface. The results show that the relation is good if the strain criterion for evaluating liquefaction is not larger than 6%.

关 键 词：土的剪切波速 砂土液化 振动三轴试验 砂土抗液化强度 

分 类 号：TU435[建筑科学—岩土工程]