The invention relates to a
microorganism slab grouting device and a
microorganism slab grouting method used for reinforcing a liquefiable foundation. The device comprises a grouting panel, a pipeline switching device, an extended panel and grouting pipes. The grouting method comprises the following steps: a. vertically ramming
microorganism slab grouting devices arranged in I and II forms into a to-be-reinforced stratum; b. carrying out
butt joint on one ends of the first and second grouting pipes with first and second
slurry passages in the microorganism slab grouting devices, connecting the other end of the first grouting
pipe with a valve, a grouting pump and
urease-producing microorganism bacterial
liquid storage pond in sequence, and connecting the other end of the second grouting
pipe with the valve, the grouting pump and a cementing solution storage pond in sequence; and c. opening the valve and the
slurry injection pump to
grout for the stratum, wherein the microorganism slab grouting devices are lifted uniformly during grouting, and after grouting is completed, all microorganism slab grouting devices in the field are pulled out and stand for 12h, and finally, underground water is pumped out for
sewage treatment. Compared with the prior art, the microorganism slab grouting device and method can simplify the procedures, shorten the duration and eliminate the problem of size effect.