Sealing film construction structure

The utility model provides a sealing film construction structure, which is used for sealing a reinforcing area for foundation treatment and comprises a first sealing film, a second sealing film, a sealing wall and a groove, the first sealing film and the second sealing film are laid in the reinforcing area, the sealing wall is constructed by surrounding the reinforcing area, and the groove is excavated by surrounding the reinforcing area. The groove is located above the sealing wall, the wall foot of the sealing wall exceeds the vacuum preloading area of the reinforcing area and continuously extends downwards, and the wall top of the sealing wall is lower than the vacuum preloading area; the first sealing film and the second sealing film extend to the groove bottom of the groove along the groove wall of the groove, and the clay layer backfilled in the groove compresses the first sealing film and the second sealing film. The at least two layers of sealing films are adopted to seal the reinforcing area for foun