Improved high-liquid-limit soil roadbed filling structure and construction method thereof

The invention discloses an improved high-liquid-limit soil roadbed filling structure and a construction method thereof. The construction method comprises the following steps: dividing a construction road section into zone structures according to specifications and actual requirements to form a roadbed layered filling structure, and filling high-liquid-limit soil with different components on each layer of each zone position: simultaneously doping tunnel hole slag or cement with different proportions, wherein the filling structure comprises a 93 area, a 94 area and a 96 area which are sequentially arranged from bottom to top. The 96 area comprises a 96-1 layer, a 96-2 layer, a 96-3 layer and a 96-4 layer which are sequentially arranged from bottom to top. The filling structure provided by the invention is suitable for filling a roadbed according to a wet method and a road section with insufficient high-liquid-limit soil strength, the design and construction requirements are met, a compact gravel soil body struc