English：

The deep foundation excavation project in the core area of the city has a dense flow of peopleand a large flow of traffic. The construction of large buildings in a limited site is often restricted by thesite conversion and organization coordination in the construction stage of the narrow site. Considering thelimited construction site and tight construction period, how to realize rapid backfilling construction hasbecome a common problem in ultra⁃deep foundation excavation engineering. The use of fluidizedsolidified soil backfill material to backfill the fertilizer tank realizes rapid backfill and meets the functionalrequirements of efficient and safe construction.