Microbe reinforcing sand column grouting device and test method thereof

The invention relates to a microbe reinforcing sand column grouting device, which comprises a constant-pressure funnel, wherein the constant-pressure funnel communicates with a grouting spray head through a grouting hose; the grouting spray head communicates with the upper end of a glass sleeve; in the grouting spray head, a liquid inlet pipe communicates with a spray disc body; a water outlet hole regulating switch is arranged on the spray disc body; a plurality of water outlet holes are uniformly distributed in the spray disc body; a plurality of sleeve wall holes are uniformly distributed in the sleeve wall of the glass sleeve; a hollow sleeve cover is matched with two ends of the glass sleeve; a plurality of sleeve cover holes are uniformly distributed in the sleeve cover; a hollow clamp opening plug is matched with the lower end of the glass sleeve; a liquid discharging hole is formed in the middle part of the clamp opening plug; a liquid discharging pipe is connected onto the liquid discharging hole; a