Segmented opening and closing type grouting pipe and grouting reinforcement method

The invention discloses a segmented opening and closing type grouting pipe and a grouting reinforcement method.The segmented opening and closing type grouting pipe comprises a communicating pipe and a grout outlet pipe, the grout outlet pipe is connected to the lower end of the communicating pipe and communicates with the communicating pipe, a plurality of grout outlet holes are formed in the peripheral side of the grout outlet pipe, and the grout outlet holes are communicated with the communicating pipe. The plurality of slurry outlet holes comprise normally-open holes and normally-closed holes, and after slurry is discharged from the normally-open holes, the normally-closed holes can be opened to discharge the slurry. According to the segmented opening and closing type grouting pipe, the influence range of grouting reinforcement can be accurately controlled, reinforcement of a specific soft soil layer is achieved, normal operation of existing structures and equipment is not affected, ...