Ultra-thin and high-performance composite semi-flexible surface layer pavement structure and construction method thereof

The invention relates to a high-performance composite semi-flexible surface layer pavement structure and a construction method thereof. The pavement structure is arranged on subgrade and comprises a base layer, a lower surface layer, a middle surface layer and an upper surface layer which are sequentially arranged from bottom to top, wherein the middle surface layer is a semi-flexible pavement layer; the upper surface layer is a small-particle-size open-graded porous asphalt mixture pavement layer; and the lower surface layer is a coarse-particle asphalt mixture pavement layer. The semi-flexible pavement layer of the pavement structure is positioned in a high-stress area, and improves the rut resistance and shear resistance of a pavement. The upper surface layer adopts the small-particle-size open-graded porous asphalt mixture pavement layer so as to achieve durability and antiskid performance and also provide ride comfort. The lower surface layer adopts the coarse-particle asphalt mixture pavement layer so a