Deep foundation pit fabricated safety channel reinforcing method and construction steps

The invention discloses a deep foundation pit fabricated safety channel reinforcing method and construction steps, and particularly relates to the field of building construction. The deep foundation pit fabricated safety channel reinforcing method comprises the following steps that S1, a working face is treated, specifically, a bottom plate and side walls of a safety channel are scabbled, and high-pressure water is adopted for cleaning; S2, unit steel bar binding is carried out, specifically, the length of the safety channel is divided into N sections, and a first section of side wall and bottom plate steel bars are bound along one side of the length direction of the safety channel; and S3, a unit support is built, specifically, a first-section support is erected above the first-section bottom plate and serves as a foundation of a pressure pouring working platform and a later-stage unit formwork support. Through assembly of the multiple unit formworks, pouring can be carried out on the bottom and the side wal