The invention discloses a construction method of a mixing
pile wall. The construction method comprises the following steps that preparation is conducted before construction, specifically, the
earth surface in a construction area is treated, and the flatness of
a site is ensured; groove construction is conducted, specifically, a groove is excavated, and a mixer is positioned; mixing construction is conducted, specifically, a three-axis mixing
pile machine is adopted for construction, pre-mixing sinking is conducted through the three-axis mixing
pile machine, and the sinking speed is 0.5-1m / min; after the designed depth is reached, a
mortar pump is started, after
slurry reaches a
slurry spraying opening, the mixing pile
machine is lifted,
slurry spraying and lifting of the mixing pile machine are achieved simultaneously, and the lifting speed is not larger than 1-2m / min; construction is repeated, the four-spraying and four-mixing process is achieved, and the
cement mixing amount reaches 20-25%; and H-shaped steel is inserted, pulled and recycled. Construction of the mixing pile wall is conducted through the method, the stability of adjacent soil can be effectively ensured, and the construction efficiency is improved while the
occurrence probability of hazards such as adjacent
ground settlement, house inclination, road
cracking and underground facility displacement is decreased.