Multi-hole drill rod and method for hydraulic re-spraying type all-directional high-pressure jet grouting

The invention discloses a hydraulic re-spraying type all-directional high-pressure jet grouting porous drill rod and method. The hydraulic re-spraying type all-directional high-pressure jet grouting porous drill rod comprises a porous pipe, a hole cutting water pipe, a mud discharging pipe, a main air pipe, a cement paste pipe and an auxiliary gas pipe, a hole cutting water hole is formed in a bottom port of the perforated pipe and is communicated with a hole cutting water pipe; a sludge discharge port is formed in the side surface of the lower part of the perforated pipe and is communicated with the sludge discharge pipe; a main gas nozzle and a cement guniting opening are further formed in the side face of the lower portion of the perforated pipe, the cement guniting opening is located between the bottom hole cutting water hole and the mud discharging opening, and the main gas nozzle is annularly arranged on the periphery of the cement guniting opening; the main gas nozzle is communicated with the main gas