【摘要】 建立了循环荷载作用下软黏土地基中孔压发展的经验模型,通过回归分析得到了模型计算参数.采用动态弹塑性有限元法分析了交通荷载作用下道路与软土地基共同作用的变形特性,考虑了孔压对软土地基变形特性的影响.提出了交通荷载在软土地基中的“临界影响深度”的概念,通过计算实例分析表明,在给定工况下交通荷载在软土地基中的临界影响深度约为10m,有效影响深度约为18m,为道路工后沉降计算提供了参考.更多还原

【Abstract】 An empirical pore pressure model of soft clay under cyclic loading was established. Dynamical elasto-plastic finite element method(FEM) was used to analyze the deformation characteristics of the pavement and soft subsoil under traffic load, considering the effect of pore pressure generated during the loading. The concept of critical effect depth was brought forward. The case studied showed that the critical effect depth was about 10 m, and the depth significantly influenced by traffic load was about 18 m in the soft subsoil. The model is simple and can be easily used in practical engineering.更多还原