京沪高速铁路饱和粉土液化特性试验研究  

Experimental research on liquefaction behavior of saturated silt for Beijing-Shanghai High-speed Railway

作　　者：严栋[1] 蒋关鲁[1] 刘先峰[1] 李华明[1] 

机构地区：[1]西南交通大学道路与铁道工程系,成都610031

出　　处：《岩土力学》2008年第12期3337-3341,共5页Rock and Soil Mechanics

基　　金：铁道部科技研究开发计划项目(No.2003G06)

摘　　要：饱和粉土地基在动荷载作用下的液化问题是高速铁路抗震设计中重要的研究内容。为了能够定量地分析京沪高速铁路饱和粉土地基在加固前后的抗液化强度和地震时的变形特性,在室内对加固前后两种不同密度的饱和粉土进行了3组围压条件下一系列振动三轴液化试验。试验研究获得了两种不同密度饱和粉土的抗液化强度曲线、动强度及超静孔隙水压力的增长规律,为进一步分析饱和粉土地基在加固前后的液化变形特性提供了科学数据。The liquefaction for saturated silty foundation under dynamic loading is the important research content in the domain of aseismic design of high-speed railway. To analyze the liquefaction resistance and deformation characteristics before and after reinforcing saturated silty ground of Beijing-Shanghai High-speed Railway, a series of dynamic triaxial tests are carried out under two different densities with three pressure conditions of saturated silt in the laboratory. The increasing law of liquefaction resistant curves under two different dry densities of saturated silt, dynamic intensity and the process of bulit-up pore pressure are got from the test research. It can provide the scientific data to further analyze the liquefaction deformation characteristics before and after reinforcing saturated silty ground.

关 键 词：饱和粉土 抗液化强度 动三轴试验 地震 

分 类 号：TU411[建筑科学—岩土工程]