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饱和粉土地层在地震作用下可能因地基液化而发生破坏。该文采用三维有限差分程序FLAC3D(Fast Lagrang-ian Analysis of Continua)对碎石桩加固的液化粉土地基进行数值模拟,采用动力和流体的流固耦合理论分析了振动过程中土体孔隙水压力的产生、扩散与消散,得到碎石桩加固液化地基土模型的抗液化效果。经数值分析,证实了碎石桩具有显著的排水效果。该方法能较好地模拟可液化土的动力特性,为液化场地土-结构相互作用体系动力分析提供了参考。
Saturated silt strata may be destroyed by ground liquefaction due to earthquakes. In this paper, three-dimensional finite difference program FLAC3D (Fast LagrangananalysisofContualand) numerical simulation of liquefiable silty ground reinforced by gravel pile, using fluid and fluid fluid-solid coupling theory analysis of the soil pore water pressure The generation, diffusion and dissipation of the liquefaction effect of soil model of liquefied foundation strengthened by gravel pile. The numerical analysis confirmed that the gravel pile has a significant drainage effect. This method can simulate the dynamic characteristics of liquefiable soil well and provide a reference for the dynamic analysis of soil-structure interaction system in liquefied field.