What is Jet construction method? Churning construction method is to use the grouting rig drilling tube with a special nozzle to a predetermined position after the formation of the tunnel Jet rig, with a high-voltage pulse pump self-propelled tunnel Jet rig will drill through the bottom of the cement slurry injection Churning Pile in tunnel drilling machine, to spray around the buried body at a high level tunnel Jet portable rig, with the impact force of the fluid cutting the soil, so the soil within range jets destroyed, while the drill pipe to one side a certain speed of rotation, low side slowly improved, so that the soil and water slurry thoroughly mixed, uniform in diameter, with a certain strength of the pile after the formation of hardened cement in the foundation, so that the formation to get reinforced. Soft Ground Treatment Methods: sand cushion method to the upper foundation soft soil thin and large water content in the soft ground pad about 0.5 ~ 1.2m thick sand cushion. This will achieve the consolidation of soft soil, so that the upper portion of the drainage layer of sand cushion to play the role; the same time, sand cushion filling has become within the underground drainage layer to reduce the water level inside the filling; during filling and foundation treatment Construction, the construction machinery with good traffic conditions.