The invention discloses a passive up hole grouting hole sealing and check plug. The passive up hole grouting hole sealing and check plug comprises a connecting
pipe for penetrating a pressure measuring
pipe, and a round disc for blocking an up hole, the round disc is provided with a grouting through hole, a
grout return through hole and a connecting through hole, the first end of the connecting
pipe is connected with the wall of the connecting through hole, and the pipe wall close to the second end of the connecting pipe is symmetrically provided with two wedging seams coaxial with the connecting pipe. The invention also discloses a grouting hole sealing method through the passive up hole grouting hole sealing and check plug. The method comprises, after uniformly filling fabric coated with
polyurethane into a passive up hole, sleeving the round disc onto the pressure measuring pipe, a grouting pipe and a
grout return pipe correspondingly through the through holes, and then instantly binding and connecting the connecting pipe and the pressure measuring pipe. Due to the fact that the wedging seams provide the connecting pipe with certain elasticity, the connecting pipe and the pressure measuring pipe can be rapidly and stably connected together through the elasticity; by means of the characteristics of the pressure measuring pipe fixedly mounted inside the holes, the connecting pipe can press the round disc strongly, so that the
polyurethane inside the holes can avoid leakage.