Experimental studies of dynamic properties of soils of railroad embankments

The safety and stability of train traffic directly depend on the reliable operation of railroads and the condition of the subgrade. The main purpose of the research was to study the influence of vibration effects on the deformation characteristics of cohesive soils used in the subgrade of railroad embankments. The paper presents the results of compression tests, as well as deformability parameters of the studied soils under static and vibrodynamic loads. The values of deformation modulus (E) for soils of natural origin and with disturbed structure are discussed. It is confirmed that the change in the modulus of deformation of non-water saturated cohesive soils under the influence of vibration depends on changes in the stress state. The modulus of deformation of non-water-saturated clayey soils under static and vibrodynamic loads is determined by the type and nature of interactions between soil particles, as well as possible changes in the process of testing. Soil humidity is one of the key factors influencing the nature of water-colloidal bonds and deformation properties of the soil sample under both static and vibrodynamic loading conditions.