Ground pressure circle spray reinforcement principle: High Pressure Injection Method is based on the grouting, high pressure injection technology and developed a new foundation reinforcement methods. It is designed to take advantage of the ejection tube is inserted into the project as a pilot hole drilling rig, the post-treatment with a special nozzle depth, with high pressure pumps and other high-voltage pulse generating device, the slurry or water flow 20 ~ 40 MPa high-pressure spray from the nozzle the impact cutting soil. When the energy, speed, dynamic pressure was pulsating like a jet strength of soil structure over time, peel off the soil particles begins with the soil. Part of the fine soil particles are injected slurry replaced with specialized soft-processing equipment, it was brought to earth surface with the stream (commonly known as oozing slurry). The remaining soil particles and slurry mixing, according to a certain proportion of the slurry and soil quality have rearranged regular size. After the slurry is solidified, they form a consolidated body, the moving direction of solidification body shape and jet stream about the soil. High pressure jet grouting method for handling mud, muddy clay, clay soil, silt, loess, sand, artificial fill and other foundations. When the large particle of soil contains more stone, hard clay soil, large amounts of plant roots or excessive use of soft organic matter foundation pile foundation treatment, should determine the extent of its use according to the results of the field test. Churning Pile Driver 1. Because of the high pressure rotating jet of air and high pressure water cutting, replacement, will produce large amounts of soil cement slurry, mud precipitation should be set in place. 2. The arrangement of highway soft ground good high-pressure pump, mud mixer, pulp material yard and water, electricity, transport slurry pipeline and other processing equipment, and equipment maintenance and debugging equipment. 3. Hole Stakeout Stakeout hole according to design drawings and specifications, using jump hole shotcrete method. The drilling rig will drill accurately locate the center in place, drilling location and design of the positional deviation of less than 10cm. Drilling rig correct settle, drill vertical gradient of 1.5% or less, start drilling, the drilling process should always pay attention to the drill deflection, and timely correction. Borehole casing protection using orifice. 5. Preparation of slurry use mixer, mixing water with 42.5 ordinary portland cement 1: 1 water-cement ratio, stir, preparation of cement slurry injection at any time at any mixing. 6. cannula spraying jet grouting equipment in place, the degree of correction of vertical rack level degree and spray supervisor, filling tube is inserted before the high pressure injection holes with medium soft foundation treatment spray test to check injection and grouting system is smooth, then The infusion tube is inserted with a hoist design depth of drilling, jet grouting work began, according to a pile experimentally determined to enhance the speed, and the rotation speed, while upgrading sprinkler pipe while rotating, to be reached within the design of the nozzle length stop spraying, perfusion tube propose orifice, static pressure grouting in the borehole to prevent formation concave consolidation. 7. Move the rack and flush lines primed, mobile rack, washing line equipment, began construction of a next hole.