Pavement construction with hierarchically completely encapsulated roadbed and construction method thereof

The present invention provides an all-inclusive road subgrade layered construction method and construction, pavement structure comprises a subgrade, subgrade a multilayer structure, each layer are sealed package has subgrade Full waterproof reinforcing layer, and superimposed integral roadbed; the present invention, while improving the roadbed bearing capacity and stability, preventing the water-bearing layer subgrade exchange with the outside world, can prevent surface water, and groundwater seepage into the embankment slope layers and internal load-bearing pavement subgrade affect bearing capacity and stability, while effectively solving water damage, but also to ensure the water content of roadbed materials, embankment so long in optimum control of the moisture content of construction work, to avoid evaporation loss of water content channel gene, a non-uniform migration bearing capacity caused, solid and serious deterioration of differential settlement; roadbed stability control moisture content, but also to make the region a strong roadbed expansive soil water sensitivity, soil and other collapsible construction make the best take advantage of avoiding excavation abandoned soil, fill borrowed material and transport, saving the project cost and energy saving.