Attenuation Law of Train-Induced Vibration Response of Subgrade in Beijing–Harbin Railway

To investigate environmental vibration in the case of railway subgrade seasonally frozen regions, field experiments were conducted on Beijing–Harbin China autumn and winter. Vibration acceleration level attenuation law analysed based monitoring results. Accordingly, influence freeze-thaw states, vehicle load, train formation, running speed surface was analysed. The response decreased with an increase distance from track. curve can be fitted using negative exponential function, linear function. Additionally, during period greater than that unfrozen owing to increased strength rigidity damping ratio after freezing, which response. Moreover, intensity load formation driving within a particular range. findings this study provide objective basis for design disaster assessment cold regions China.