Anti-seepage auxiliary guide and drainage structure for watery room and construction method

According to the leakproof auxiliary guide and drainage structure for the watery room and the construction method, a PVC pipe hole 101 is formed in the bottom of a structural descending plate 1 through drilling of a water drill, and a lower horn mouth 102 and an upper horn mouth 201 are formed in the joint of the structural descending plate 1 and a composite light aggregate filling layer 2 through carving treatment; the top of the vertical end of the PVC pipe 9 is inserted into the PVC pipe hole 101; the outer side of the top of the PVC pipe 9 is filled with graded pebbles 11; a polypropylene fiber fabric layer surface layer 12 is arranged at the contact part of the structural descending plate 1 and the graded pebbles 11; a geotechnical cloth cover layer 13 is arranged at the contact part of the composite lightweight aggregate filling layer 2 and the graded pebbles 11; and fine aggregate concrete 14 is filled between the structural descending plate 1 and the inner wall of the PVC pipe hole 101. Through on-sit