Red clay roadbed structure

The utility model discloses a red clay roadbed structure. The red clay roadbed structure is characterized in that a water draining isolation pad layer (13) is paved at the bottom of a roadbed, a low-liquid-limit clay filling layer (7) is paved above the water draining isolation pad layer (13), a red clay filling layer formed by layered alternate paving of red clay (5), geogrid (8) and medium-fine sand (15) is paved above the low-liquid-limit clay filling layer (7) and is coated with waterproof geotechnical cloth (14) in a sealing manner, a coarse grain soil layer (6), a waterproof bottom base layer (3), a waterproof base layer (2) and a waterproof road surface (1) are sequentially arranged above the red clay filling layer, a layer of side edge geogrid (10) is respectively paved in the middle of the low-liquid-limit clay filling layer (7) on each of the two sides and is firmed by using U-shaped nails (9), reverse filtration layers (11) are paved on the two sides of the low-liquid-limit clay filling layer (7), and water permeable pipes are arranged on the two sides of the low-liquid-limit clay filling layer (7), and a layer of turf (12) is paved on the outer layer of a roadbed slope. The red clay roadbed structure can keep the interior of the roadbed at a drying state and ensure that a red clay embankment is at a good drying holding force state all the time.