Distributed grouting device and method for approach bridge pile foundation

The invention provides an approach bridge pile foundation distributed grouting device and method. The approach bridge pile foundation distributed grouting device comprises a grouting pipe, a grout outlet valve and a grout stop valve. The grout stop valve comprises a grouting pipe and a pressurizing pipe, one end of the grouting pipe is connected with the grouting pump through a grout supply pipe, the other end of the grouting pipe is a closed end, a grout outlet is formed in the middle of the grouting pipe, the two ends of the grouting pipe are sleeved with balloons respectively, the balloons located at the two ends of the grouting pipe are connected in series through the pressurizing pipe, and the two balloons block the two sides of one grout outlet valve respectively. And therefore, the grouting pipe, the grout outlet and the corresponding grout outlet valve form a grouting channel. And the grout stop valve is arranged, independent grouting can be carried out for different grout outlet valves, and therefore