Rapid backfilling construction method for single-span basement fertilizer groove separated by post-cast strip

The invention relates to the technical field of building construction, in particular to a post-cast strip separated single-span basement fat groove rapid backfilling construction method which comprises the following steps: construction preparation; checking the bearing capacity of the outer wall; top plate post-cast strip conversion support design; a top plate post-cast strip conversion support is installed; blocking the outer side of the outer wall post-cast strip; outer wall waterproof and protective layer construction; backfilling a fertilizer groove; temporarily sealing the post-cast strip; post-cast strip measures are removed; pouring post-cast strip concrete; the construction method has the beneficial effects that reliable conversion support and temporary plugging measures are adopted, reliable transfer of backfill soil side pressure and waterproof soil retaining at the backfill post-cast strip of the fertilizer groove are achieved, and the backfill construction of the fertilizer groove is rapidly compl