The invention discloses a large
diameter cement soil
pile construction method. The large
diameter cement soil
pile construction method includes: using a rotary drilling
machine for performing rotary soil fetching to form a hole, gradually performing the soil fetching for forming the hole and stopping drilling until reaching the designed
pile bottom elevation, then injecting
cement slurry into thebottom of the hole, replacing a
drill bit of the rotary drilling
machine with a stirring
drill bit, placing the stirring
drill bit at the bottom of the hole for stirring the bottom of the hole, then adding backfill materials in the hole in batches, lifting the stirring
drill bit while rotating and stirring, and completely stirring the
cement slurry and the backfill materials uniformly from the bottom up so as to solidify the
cement slurry and the backfill materials into a pile. The large
diameter cement soil pile construction method solves the puzzles that in a compact stratum, mechanical ability is restricted, stirring resistance is large, and construction efficiency is low by adopting the hole preforming technology, achieves substantial enlargement of the diameter of the pile, obtains astable pile shape, uses drilling cuttings as pile forming materials in the backfill materials, reduces environment
pollution and resource waste, more easily stirs for mixing the materials uniformly, guarantees construction quality, can guarantee cement
soil strength of the pile body by controlling a cement ratio, and facilitates guarantee for stirring uniformity of the pile body by placing the cement in the hole in advance.