Silty-fine sand soil body in-situ curing roadbed and construction method thereof

The invention discloses a silty-fine sand soil body in-situ curing roadbed and a construction method thereof, and belongs to the technical field of road engineering, the silty-fine sand soil body in-situ curing roadbed comprises a drainage cushion layer and a curing layer located above the drainage cushion layer, and the curing layer is formed by stirring silty-fine sand and a curing agent; the cavity for embankment filling is constructed in situ through the embankment formwork, the drainage cushion layer is arranged at the bottom of the cavity, and the structure is simple. According to the construction method, the cavity for filling the embankment is constructed in situ through the embankment formwork, the drainage cushion layer is arranged at the bottom of the cavity, the silty-fine sand can be directly injected into the cavity of the embankment, preliminary drainage is achieved, after the water content is reduced to the optimal water content, the curing agent is added and stirred, mixing is carried out acc