Roadbed structure of high-speed railway on unsaturated soil foundation in flat area

A roadbed structure of a high-speed railway on an unsaturated soil foundation in a flat area has the characteristics of strong integrity and good stability, can effectively prevent roadbed descending and satisfy the requirements of the high-speed railway for high ride comfort, stability and service durability. The roadbed structure comprises the unsaturated soil foundation (10) and an embankment filling body (20), wherein loading berm aquitards (40) are arranged on two sides of slope toes of the road embankment filling body (20); foot protecting walls (50) are arranged on the outer sides of the loading berm aquitards (40); and the loading berm aquitards (40) are formed by densely filling soil free of water seepage. The utility model has the advantages that the technical problems in the field are effectively solved; a high-speed railway embankment is directly built on the unsaturated soil foundation, which can considerably reduce the construction cost of the high-speed railway roadbed; and the roadbed structur