Structure for reducing underground water buried depth of disposal site and preparation method thereof

The invention belongs to the field of disposal of radioactive solid waste and particularly relates to a structure for reducing the underground water buried depth of a disposal site and a preparation method thereof. According to the structure, clay is arranged on the two sides of a radioactive disposal unit, the height of the clay is the same to the ground elevation, crushed stone or rubble stone is arranged on the outer side of the clay on the side close to a water source, the height of the crushed stone or rubble stone is equivalent to that of the clay, and the section of the crushed stone orrubble stone is an inverted trapezoid; and an inverted filter layer is arranged below the crushed stone or rubble stone, rubble stone is arranged below the inverted filter layer, a cover plate is arranged below the rubble stone, a drainage stone groove is formed in the cover plate, and the water source and granite are arranged on the other side of the crushed stone or rubble stone. The structurefor reducing the undergrou