High pressure sprinkling grouting technology is one of the methods of soil improvement. Its principle is to chisel pipe with special nozzle in soil lay of appointed depth by drills, then jet slurry or water from the nozzle at the pressure of 20-40MPa and come into being jet grouting destroying soil layer. Among the destroyed soil granules, the thinner wells up from the ground with slurry or water, and the others mix with slurry under the effect of jet's impact force, centrifugal force, gravity and so on, th...