Pile bottom grouting device and use method thereof

The invention discloses a pile bottom grouting device and a use method thereof. The pile bottom grouting device comprises a cone head, a grouting pipe and a rubber non-return sleeve. The cone head isfixed to the bottom end of the grouting pipe, slurry through holes are evenly distributed in the two sides of the bottom of the grouting pipe, the pipe section, provided with the slurry through holes,of the grouting pipe is a grouting section, the rubber non-return sleeve wraps the grouting section, the inner wall of the rubber non-return sleeve covers the surfaces of the slurry through holes, and the upper end and the lower end of the rubber non-return sleeve are fixed to the grouting pipe through fastening devices. The use method of the pile bottom grouting device includes the steps that the position of the grouting pipe is adjusted, the grouting pipe is fixed, a reinforcement cage is hung, concrete is poured, and pile body soil mass is reinforced. According to the device, the poured concrete and the grouting pi