饱和砂土振动液化的分析与应用  

Analysis and Research on Sand Vibrating Liquefaction

作　　者：徐秀香[1] 

机构地区：[1]辽宁城市建设职业技术学院,辽宁沈阳110163

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第4期716-719,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(50578144);辽宁省博士启动基金项目(20061001)

摘　　要：目的探讨饱和砂土发生振动液化使地基土体丧失抗剪强度和承载能力,解决引起工程结构破坏的实际问题.方法利用砂土振动液化机理、液化可能性及液化稳定性原理,详细地分析碎石桩加固的液化砂土地基.结果碎石桩加固后的地基,含水量与孔隙比有所减小,而重度、内摩擦角、黏聚力明显增大,饱和砂土抗振动液化能力提高.结论采用碎石桩加固粉细砂土地基,有效地消散和防止孔隙水压力的增高和砂土振动液化的产生,提高了地基土抗振动液化能力.从而为工程设计提供参考依据,为科学研究积累大量数据.The saturated loose sand soil loses its strength and then turns into fluid state rapidly under the live loading. Vibrating liquefaction is a special strength problem, and with strength of significant losing suddenly as characteristic. So intensive study of the basic rule with the deformation greatly and the mechanism of the generation of the saturated sand soil after liquefaction, that forecasts and prevents danger resulting from seismic liquefaction. This text mainly aims at the seismic liquefaction problem of the saturated sand soil, from liquefaction of mechanism, liquefaction possibility judgment etc. to obtain more systemic analysis and summary, and takes the study of the liquefaction of saturated sand soil with relative papers and investigations. Consequence kinds of estimation methods of liquefaction possibility have been summed up, such as analysis of liquefaction stability and deformation etc. There will be certain effect on research about forecasting of saturated sand soil liquefaction and preventing danger resulting from seismic liquefaction.

关 键 词：振动液化 饱和砂土 碎石桩 标准贯入试验 加固机理 

分 类 号：TU411[建筑科学—岩土工程]