Deformation control device for large-span tunnel initial support in water-rich soft section

The invention provides an initial support deformation control device for a large-span tunnel in a water-rich soft section. The water-rich soft section large-span tunnel initial support deformation control device comprises an upper step temporary inverted arch. The supporting mechanism comprises feet-lock bolts, I-shaped steel frames, a concrete layer, a steel wire mesh and steel bars, the I-shaped steel frames are installed on the side wall of the upper step temporary inverted arch at equal intervals, and the feet-lock bolts are obliquely installed on the side walls of the I-shaped steel frames; an anchor rod; a sealing mechanism; the protection mechanism comprises a waterproof adhesive tape, a geotechnical cloth layer and connecting rods, the geotechnical cloth layer is fixed to the side wall of the anchor rod through the waterproof adhesive tape, the connecting rods are symmetrically installed on the side wall of the geotechnical cloth layer, and the connecting rods abut against the side wall of the anchor