Novel roadbed structure for phreatic high inland sulphate salty soil

The invention discloses a novel roadbed structure for phreatic high inland sulphate salty soil. The structure sequentially comprises an embankment, a drainage device, a separating-discharging saline layer, a lower roadbed layer, an insulating separation layer and an upper roadbed layer from bottom to top. The drainage device and the separating-discharging saline layer are arranged above the phreatic line and below the salt expansion line. The separating-discharging saline layer is arranged in the embankment, wherein the lower bottom face is 30-50cm higher than the phreatic line. The drainage device is respectively arranged at the axle wire of the embankment and the embankment below the separating-discharging saline layer. The separating-discharging saline layers on both sides of the axle wire incline downward in the middle at 5-8 degrees. The lower roadbed layer is 30-50cm thick, the insulating separation layer is 30-50cm thick, and the upper roadbed layer is 20-30cm thick. According to the roadbed structure