饱和砂土的剪切波速与其抗液化强度关系研究  

Experimeatal study on quantitative relationship between shear wave velocity and cyclic liquefaction resistance of saturated sand

作　　者：程国勇[1] 王建华[2] 张献民[1] 

机构地区：[1]中国民航学院土木工程系,天津300300 [2]天津大学岩土所,天津300072

出　　处：《岩土力学》2007年第4期689-693,共5页Rock and Soil Mechanics

基　　金：天津自然科学基金资助项目:(No.023607511)

摘　　要：根据饱和砂土剪切波速与其抗液化强度的相关性原理,利用剪切波速与振动三轴联合实验装置,进行了控制饱和砂土初始剪切波速的振动液化实验,依据实验结果建立了剪切波速与抗液化强度的定量关系。最后用现场勘查数据对此定量关系进行验证,结果表明:该关系式对实际66个未液化地点的判别准确率达到81.2%;对108个实际液化地点的判别准确率达到62.8%;平均判别准确率达到69.5%。According to the dependence between Shear wave velocity and cyclic liquefaction resistance of saturated sand, combined tests were carried out for remoldeld saturated sands, during which the shear wave velocity of saturated sand sample was fistly tested in the cyclic triaxial cell and then the normal cyclic liquefaction test performed. Then, by analysing the test results, the quantative relatiobship between shear wave velocity and the cyclic liquefaction resistance of saturated sand was obtained. At last, 174 earthquake sites data was utilized to verify the reliability of the relational expression. The results show among the 66 non liquefied sites the correct rate of the expression is 81.2 % and among the 108 liquefied sites the correct rate is 62,8 % in general, the average correct rate of the relational expression is 69.5 %.

关 键 词：土的剪切波速 饱和砂土液化 抗液化强度 动三轴实验 

分 类 号：TU435[建筑科学—岩土工程]