Refuse landfill bottom seepage prevention structure

The invention belongs to the technical field of refuse landfill engineering, and particularly discloses a refuse landfill bottom seepage prevention structure with the better seepage prevention effectand a construction method for constructing the above refuse landfill bottom seepage prevention structure. The refuse landfill bottom seepage prevention structure extends along the surface of a bank slope basic layer through a compaction clay layer to form a clay layer extending section, a seepage prevention protective screen can be formed on the bank slope basic layer, the bank basin effect of thecompaction clay layer is effectively strengthened, the connecting reliability of a bentonite carpet and the compaction clay layer can be strengthened, and the seepage prevention safety of the refuselandfill bottom seepage prevention structure is improved; and a double-polished face HDPE film and a double-rough face HDPE film are connected in a staggered manner to form a film connecting part, thebetter seepage prevention e