Application method of bag grouting pile in soft soil foundation of railway

The invention discloses an application method of a bag grouting pile in a soft soil foundation of a railway. A grout mixing and storing system, a mud jacking pump and a grouting pipe applicable to high pressure are contained, wherein the grout mixing and storing system comprises a grout mixing barrel and a grout storing barrel, one end of the mud jacking pump is connected with the grout storing barrel, and the other end of the mud jacking pump is connected with the grouting pipe through a sprinkler recorder, and a geotextile bag is tied outside the grouting pipe. Cement grout is injected to form the pile under high pressure by use of the mud jacking pump and the grouting pipe, the swollen geotextile bag plays a role in compaction on peripheral soil mass through extrusion, a pile body obtained after the geotextile bag is hardened and pile space soil form a manual composite foundation, so that the stability and the bearing force of the foundation are greatly improved, defects that diffusion is easily caused dur