地震荷载作用下饱和粉土地基液化深度试验研究

Experimental Study on Liquefaction Depth of Saturated Silty Soil Ground under Seismic Loading

摘要:

对地震荷载作用下不同深度饱和粉土地基的液化特性进行研究，通过室内动三轴试验研究地震荷载作用下饱和粉土地基的最大可液化深度，试验中通过对给定不同应力幅值动荷载作用下饱和粉土的液化特性进行研究，得到不同地震烈度下不同深度土体的动剪应力比与破坏振次关系曲线，进而结合地基液化判别公式判断不同深度饱和粉土在不同地震烈度下是否发生液化。研究成果为高烈度地区确定抗液化措施及处理深度提供了依据。

Abstract:

To obtain the corresponding maximum liquefaction depth of saturated silty soil ground under different seismic shock conditions，we studied the liquefaction behavior of saturated silty soil under various seismic loading conditions at different depths.We conducted a series of GDS dynamic triaxial tests to consider different dynamic loads which were set in advance，and determined the degree of silt soil liquefaction at different depths and different seismic shock conditions.We also obtained the relationship between the dynamic shear stress ratio and the number of soil cycles.We established liquefaction depth according to the discriminate formula.The results can be used to predict soil liquefaction depths for high seismic intensity area projects.