Permanent deformation characteristics and deterioration of permeability function of porous multi-layered ground

以多孔多层地基的累积塑性变形（车辙）和渗透性为研究对象，试图从单元和多层结构两个层面把握交通荷载作用下的车辙进展和渗透功能恶化。通过反复三轴压缩试验和落头渗透试验，得到了破碎路基土和砂质路基土的加载次数与累积塑性变形和渗透率的关系。提出了预测累积塑性变形和渗透率劣化的公式。通过在多孔多层模型地基上进行移动轮载试验，阐明了随着轮载次数的增加，车辙发展、荷载传递能力恶化和渗透性能恶化的机理。

With the focus on the accumulative plastic deformation (rut) and permeability of porous multi-layered ground, an attempt was made to grasp the rut progress and deterioration of permeability function due to traffic loadsfrom the levels of an element and a multi-layered structure. As the main findings, the relationships of the number of load applications with accumulative plastic deformation and permeability were obtained for a crusher-run and sandy subgrade soil from the repeated triaxial compression tests accompanied by falling-head permeability test. The equations of predicting the accumulative plastic deformation and permeability deteriorationwere also proposed. From the moving wheel load tests on porous multi-layered model ground, were elucidated the mechanisms of the progress of rut, the deterioration of load transfer capability and the deterioration of permeability function with the increase of the number of wheel loads.