Steel pipe pile side and pile end integrated grouting device and construction method thereof

The invention discloses a steel pipe pile side and pile end integrated mud jacking device and a construction method thereof.The device comprises a mud jacking straight pipe, a pile end mud jacking ring pipe, a plurality of pile side mud jacking ring pipes, an L-shaped connector and a force transmission pipeline, and the pile end mud jacking ring pipes and the pile side mud jacking ring pipes are installed in the steel pipe pile side through corresponding annular supporting frames; the multiple pile side grouting ring pipes are sequentially distributed along the axis of the steel pipe pile from bottom to top, the pile end grouting ring pipes and the pile side grouting ring pipes are each provided with a plurality of grouting heads, the heads of the grouting heads located on the pile end grouting ring pipes are arranged downwards, and the heads of the grouting heads located on the pile side grouting ring pipes extend out of the outer side of the steel pipe pile. The grouting straight pipe is arranged on the out