STEEL TUBULAR PILE DRIVING WORK AND PRESSURE FLUID INJECTOR THEREFOR

摘要

PURPOSE:To raise the efficiency and strength of driving a steel tubular pile by a method in which a pressure fluid injecting means is provided inside the steel tubular pile and the steel tubular pile is driven into the ground while concurrently injecting a pressure fluid and discharging soil and sand. CONSTITUTION:In a pressure fluid injector 3, a short pipe 31 is fixed to the downside of two stopper plates longer than the diameter of the steel tubular pile 1, and a loop pipe 32 is fixed to the periphery of its intermediate. A water conveyance pipe 34 is provided at the downside of the pipe 32 and an injection nozzle 35 at the lower end of the pipe 34. A pressure fluid is jetted from the injection nozzle 35 and the steel tubular pile 1 is driven into the ground while positively discharging soil and sand inside the steel tubular pile 1 by means of a pile (not illustrated). Thus, the steel tubular pile 1 can be driven with a high accuracy.