Roadbed humidity control and drainage intelligent device based on modified water-absorbent resin and application method of roadbed humidity control and drainage intelligent device

The invention belongs to the technical field of roadbed humidity control and drainage, particularly relates to an intelligent roadbed humidity control and drainage device based on modified water-absorbent resin and an application method of the intelligent roadbed humidity control and drainage device, and aims at solving the problems that an existing roadbed cannot adsorb and discharge roadbed moisture and is prone to causing disasters. An improved roadbed layer is laid on the top of the foundation, a pavement layer is laid on the top of the improved roadbed layer, a first drainage device is arranged between the foundation and the improved roadbed layer, and a pavement layer second drainage device is arranged between the foundation and the improved roadbed layer. The drainage device comprises the following components: a double-layer high-suction geotextile, 4-10% of modified water-absorbent resin, flocculent filler and a humidity-sensitive material, the improved roadbed layer is prepared from the following com