Churning slurry hardening mechanism in the soil of the high-pressure injection of sclerosing agent used mainly cement, and adding additives precipitate or accelerate prevention solidified therein. Churning consolidation of body is a special cement - soil skeleton structure, water-reactive cement soil more complex than pure mud. Since cement is a spatial non-uniformity of soil material in the mixing process of high pressure jet grouting, cement and soil mixed together, between the soil particles are filled by grout. After the cement hydration in the surrounding soil to form crystalline particles of various hydrates, they continue to grow, especially needle-like crystals of ettringite, quickly grow intertwined to form a network structure of space, surrounded by soil are separated In these concrete skeleton. With squeezed dense soil, free water has also been reduced, or even disappear, the formation of a special cement soil skeleton structure. Mechanism of consolidation strength increases with time from hydration and hardening of the cement, cement, respectively - to explain aspects of the formation of the spatial structure of soil, and long-term physical and chemical changes, etc. between the cement and soil. Cement clinker minerals are four basic chemical reaction with water to produce a series of crystal growth over time, almost the entire crystallization process continues, these crystals are the main source of cement strength. Cement added has fundamentally changed the structure of the soil, encased in cement particle surface soil, and stick them together to form a whole. In a short time, it is filled with cement around soil particles gel. Increasing with time sealing curtain Jet rig, cement gel crystals, and gradually fill the interstices of the soil, the soil and cement to form a special cement - soil skeleton structure, the strength of the soil also will be improved. Cement gel crystallization process is slower, and therefore, the strength of consolidation will continue to grow in the body a long time. High Pressure Jet Grouting Construction Technology Control 1, high pressure spraying pile in front of the official construction process test should be carried out into the pile. 2, the construction of the drilling rig placed smooth, drill pipe held vertically, the inclination of not more than 1.5%, the location and design of the rig position deviation of not more than 50mm. Grouting pipe segment elevated lap length not less than 100mm. 3, appears in the grouting process pressure suddenly rise or fall. When a large number of risk pulp unusual circumstances, should be stopped in time to upgrade and grouting to prevent broken pile. 4, strict quality inspection bodies including the consolidation of an effective diameter of the integrity and uniformity of solidification body inspection bodies consolidation, vertical consolidation of the body, the strength properties of solidification body comprises an axial pressure, the horizontal pressure , frost resistance and impermeability, consolidated body of corrosion and durability. 5, pay attention to the device when the start sequence jet grouting. With triple tube Case Jet rig, you should load starting air compressor, to be operating normally after the new track Jet rig, and then load starting high pressure slurry, and then the hole while air and water, wind and pump pressure gradually increased to a predetermined value. To the injection pump suction pipe to move slurry storage after the feng shui flow, rotary grouting pipe, and start spraying one injection pump drilling rig anchor Jet, 先向 delivery of water wells, pump until the pump output pressure is normal Start injecting barrel. To be estimated before the grout has been out of the nozzle after the peak, before beginning upgrade grouting pipe, bottom jet grouting.