Method for realizing seepage prevention of bridge wall by means of polyvinyl chloride film

The invention relates to a method for realizing seepage prevention of a bridge wall by means of a polyvinyl chloride film. The polyvinyl chloride film is arranged at the center of a bridge core wall, a sand mat layer is arranged at the bottom of the bridge wall, a polyvinyl chloride film seepage prevention wall is arranged in the middle of the bridge wall, transition material layers are arranged on two sides of the polyvinyl chloride film seepage prevention wall, a dam shell is arranged outside the transition material layers, a dry stone pitching is arranged on the surface of the dam shell, and the polyvinyl chloride film in the polyvinyl chloride film seepage prevention wall vertically ascends in a zigzag folded manner. A core wall type rockfill dam is effectively built in a place without proper impervious soil, the problem of settlement deformation of the core wall type rockfill dam built on a soft soil foundation is solved, cost is saved, construction period is shortened, and fine social and economic benefits are achieved. Combined positions of the polyvinyl chloride film and the top of the seepage prevention wall and two bank slopes are feeble in seepage prevention, the polyvinyl chloride film is fixed through a pressing plate by the aid of a concave groove, concrete is backfilled, and the seepage prevention effect of the combined positions is improved.