High pressure spraying pile pulp back problem: using high pressure spraying pile as sealing curtain, before construction can dig in the pile side ditch excavation, as a back up of slurry storage places, in order to avoid venues everywhere pulp. It is to drill at the same time as the high-pressure grouting, slurry with the surrounding soil combine to form a pile of small jet grouting pile with a certain strength and sealing capabilities, it will come out of the slurry, which provides drilling and grouting to rate the amount of pressure with the good, in order to ensure the construction quality rotating pile. Note about 2m below ground level to stop grouting, in order to avoid injuries to the ground after the high pressure slurry lead to accidents. Churning Pile: the rise in the 1970s of high pressure jet grouting new high pressure jet grouting pile, the 1980s and 1990s in the country are fully developed and applied. Practice has proved that this method of treatment sludge, silty soil, clay soil, silt, sand, gravel artificial fill and soil have a good effect Churning Pile price model parameters, China have been included in the current "foundation and infrastructure construction norms. " Before the construction requirements of the construction site leveling, subgrade filling using prime land (on both sides of the embankment, sidewalks and a range of non-motorized traffic lane filling clay). Carried out before construction pile experimental jet grouting pile construction, to determine the appropriate concentration of slurry, spray volume, spray pressure, spraying process parameters to enhance the speed of construction, provide the basis for the formal construction, the number of test piles shall not be less in five.