Drive device used for soil stabilization

摘要

A drive device for injecting different types of fluids, chemicals and slurries into a subsurface for soil stabilization and removing fluids from the subsurface prior to treating a soil. The device is designed to be self advancing into the soil. When the driving of the device in the ground surface is completed, the device can be removed or it can be left in place for forming an anchor or load carrying pier. The device includes a plurality of external and internal hollow pipe sections. The pipe sections are joined together with couplings. Each coupling includes perforations therein and helices around the exterior surface of the coupling. The helices are used for driving the pipe sections into the ground. The perforations in each coupling are used for introducing fluids under pressure into the soil or for extracting fluids from the subsurface. The fluids are pumped under pressure between the inner circumference of the external pipe section and the outer circumference of the internal pipe section and out the perforations in the coupling. The internal pipe section may have a hollow cross section or a solid cross section for increased loading capacity. An upper end of the external pipe section includes a drive cap for accepting various types of torque and percussion drives for drilling the device into different types of soils. A lower end of a lead external pipe section includes a cutter head, a helix, a drill point and the like for advancing downwardly into the soil.