The invention belongs to the technical field of high-speed railway
subgrade engineering, and particularly relates to a high-speed railway
subgrade structure for
saline soil areas. The high-speed railway
subgrade structure comprises a road
cutting structure, wherein the road
cutting structure comprises a subgrade
bed surface layer and a subgrade
bed bottom layer; a partition layer is arranged at the bottom of the subgrade
bed bottom layer; a surface drain
system is arranged at each of two sides of the road
cutting structure, an underground drain
system is arranged at the bottom of the surface drain
system; the partition layer extends outwards along two sides of the longitudinal direction to intersect the surface drain system or underground drain system. Based on the compact connection of the surface drain system, the underground drain system, the partition layer and the like with the components thereof to achieve special purposes, the high-speed railway subgrade structure is simple, and can effectively
cut off
capillary water migration pathways between subgrade soil and the road cutting subgrade bed structure, thereby avoiding the problems of salt expansion, break-up expansion, melt sinking and the like and guaranteeing the long-term normal use of high-speed railway subgrade
engineering.