Numerical Analysis to Influence of Different Roller Loads for Low Subgrade Connecting

In order to analyze impact of roller loads applying in subgrade connecting, numerical software had been executed to calculate deformation caused by three types of roller loads to 6m subgrade. In this analysis, surface layer of the old subgrade, slope toe point and connecting point had been chosen as key points to study deformation under different construction processes. The results show that the displacement in the vertical direction of point A and point B increases with the roller load's increasing. Deformation of key points has the non-linear relationship with construction steps. According to the minimum deformation, the first scheme is chosen which is beneficial to the train's safty and stability of whole subgrade. It will be instructive to control differentia deformation for the connecting subgrade projects in high-speed railway.