Research on Cumulative Deformation Characteristics of Subgrade Filling under Cyclic Train Loading

The smoothness of high-speed railway is extremely strict. As an important part the foundation, subgrade structure has strict deformation requirements. It necessary to ensure that does not have plastic cumulative under long-term cyclic load train, which most critical geodynamic problem in subgrade. This paper studied characteristics filling train loading through triaxial test, three types accumulative trends, and value volume shear strain was discussed, would provide theoretical support for dynamic design railway.