堤坝砂土地基液化的数值模拟

Liquefaction Numerical Simulation of Sand Ground with Embankment

基于足立 -岗循环弹塑性模型和固液两相介质耦合的有效应力反应分析方法 ,数值模拟分析了模型试验中的堤坝及其砂土地基 ,揭示了幅值为 0 .1 g和 0 .2 g正弦波动荷载下堤坝的动力反应过程 ,并与振动模型试验的结果进行了比较分析。结果表明 ,该反应分析方法能够合理求得土体中孔隙水压力、有效应力。

Based on the effective stress liquefaction analysis method using Adachi Oka’s cyclic elastic plastic constitutive law with nonlinear hardening, numerical simulation of saturated sand ground with embankment is carried out. The dynamic response process is revealed under sine wave loading with 0.1 g and 0.2 g acceleration amplitude respectively, and compared with the results of vibration model tests. The results indicate that this responsive analysis method can be used rationally to obtain the pore water pressure, effective stress and acceleration variation in soil body and to predict the deformation of dam settlement.