Double-layer in-situ regeneration pavement structure

The invention discloses a double-layer in-situ regeneration pavement structure, which relates to the field of road maintenance and comprises a cement in-situ cold regeneration lower base layer, a foamed asphalt in-situ cold regeneration upper base layer, a medium-grain asphalt concrete layer, an earth shoulder, a hard shoulder and a gravel seal layer. According to the double-layer in-situ regeneration pavement structure, a foamed asphalt in-situ cold regeneration upper base layer is obliquely arranged from the middle to the two sides, the oblique bottommost end of the foamed asphalt in-situ cold regeneration upper base layer is connected with a water collecting frame installed in a hard road shoulder, and a water guide pipe communicated with the water collecting frame is installed in the hard road shoulder; in addition, one end, far away from the foamed asphalt in-situ cold-recycling upper base layer, of the water guide pipe penetrates through the earth shoulder and extends to the outer side, and meanwhile, t