Compound seepage prevention structure of large -scale solution cavity in karst area

The utility model discloses a compound seepage prevention structure of large -scale solution cavity in karst area belongs to hydraulic and hydroelectric engineering technical field, including basement rock and solution cavity, the solution cavity is located the basement rock, and the solution cavity hypomere is filled and is formed the solution -cavity filling district, vertically in the solution -cavity filling district lays a plurality of stufves and revolves orifice or steel -pipe pile, and the stuff revolves orifice or steel -pipe pile along prevention of seepage axis in bank interval arrangement, solution -cavity filling district upper surface is equipped with the transition bed course, and the steel -pipe pile top sets up the concrete cut -pff wall, and the cavity of concrete cut -pff wall upstream side is backfilled and is formed back filled region. This technical scheme builds the concrete cut -pff wall through taking reasonable structural arrangement in the solution cavity to solution cavity roof thr