It has been founded that the analysis model of semi-infinite three-dimensional spatial finite elements for the slab track-roadbed systems with soft rock as embankment filling

firstly

based on weak variational form of the equilibrium equations for the system in D’Alembert method; and the dynamic characteristics of the slab tracks in high-speed railways are investigated. Various state dynamic response values of the blanket top surface and soft rock filling embankment top surface are acquired

which is important for design and construction of engineering. Secondly

the engineering physico-mechanical characteristics of roadbed filling with soft rock as embankment material have been traversed by indoor test; intensity and deformation characteristics were mastered

It was demonstrated that the fillings can satisfy the requirements provision of ballastless track and embankment for high-speed railway and standards of high-speed railway roadbed design in the aspects of strength and stiffness properties.