The invention relates to the field of slope reinforcement methods, and discloses an
expansive soil slope reinforcement method based on a
microorganism induced
calcium carbonate precipitation technology, which comprises the following steps: slope surface treatment:
surface cleaning and leveling, and grouting hole arrangement; preparing bacterial liquid: culturing
sporosarcina pasteurii until the concentration is greater than or equal to 108 CFU / mL; preparing a cementing liquid: preparing
urea and
calcium chloride into a 1 mol / L solution according to a
molar ratio of 1: 1 by using preparation equipment; alternately grouting: circularly injecting the bacterial liquid and the cementing liquid until the designed amount is reached; and maintaining and planting green: covering and moisturizing, planting
vegetation, and maintaining for 28 days. According to the
expansive soil slope reinforcing method based on the
microorganism induced
calcium carbonate precipitation technology, stirring construction equipment is simple and convenient to operate, the period can be shortened, the cost can be reduced, used strains are
environmentally friendly, a stirring mechanism can move in multiple directions, and it is guaranteed that cementing liquid is evenly mixed; the gas circulation
system can control the temperature, reduce
sediment, guarantee the stability of the cementing fluid and effectively reinforce the
expansive soil slope.