Pipeline reserved hole plugging mold and construction method

The invention discloses a pipeline reserved hole plugging mold and a construction method. The mold comprises two semicircular bottom molds which are oppositely arranged; a first lap joint part is fixedly arranged at the end, in the circumferential direction, of each bottom mold, the top of the first lap joint part is flush with the top of the bottom mold, a second lap joint part is fixedly arranged at the end, in the circumferential direction, of the bottom mold, and the second lap joint part is located below the first lap joint part and matched with the first lap joint part in a lap joint mode; and semi-cylindrical hoops are fixedly connected to the bottoms of the bottom molds, and the two hoops are oppositely arranged and detachably connected together. The mold and method have the beneficial effects that the defects that hole sealing gaps are not tight, a hoop displaces and slips off, the bottom molds are deformed and staggered, and slurry leaks from a plugging part are overcome, the hidden danger of leakag