水平动载下饱和砂土地基液化区扩展

Development of the Liquefaction Zone of Saturated Sand Foundation under Horizontal Vibration

对一侧受沿深度分布的水平振动载荷时 ,半无限饱和砂土地基液化区域的扩展进行了数值分析。结果表明 :在水平振动载荷作用下 ,砂土地基液化区域从载荷端由近到远逐渐发展 ;随载荷强度和频率的增加 ,以及土体模量的减小 ,液化发展逐渐加快。在考虑的频率范围内 ,随着载荷频率的增加 ,土体表面的变形和土中的孔隙压力上升速度增加。

Through analyzing the liquefaction zone development of the saturated sand caused by horizontal vibration distributing along depth,it is shown that the liquefaction occurs near the loading end and then develops faraway.The liquefaction development of the saturated sand increases with the increase of loading amplitude and loading frequency and the decrease of the modulus.In the frequency range considered,the deformation on the surface and the pore pressure increase with the increase of the frequency.