High pressure injection stirring device having down-hole hole hammer and high pressure jet stirring method using the same

摘要

To provide a high-pressure injection agitation device and a high-pressure injection agitation method capable of creating an improvement body having a larger diameter than the conventional one.SOLUTION: A rod 1 and a construction monitor have a completely independent triple pipe structure comprising an inner pipe 9, a middle pipe 11, and an outer pipe 13. The inner pipe 9 is a flow path for the solidifying material slurry communicating with a nozzle 9c of the construction monitor, and has a vertical pipe portion 9a and a horizontal pipe portion 9b. A lower end of the vertical pipe portion 9a is provided so as to be continuous with the horizontal pipe portion 9b, and an outlet of the horizontal pipe portion 9b is the nozzle 9c. The middle pipe 11 is an air flow path 7a for driving a down-the-hole hammer, which communicates with a drive unit of the down-the-hole hammer 7. The outer pipe 13 is an air flow path that communicates with the nozzle 13c of the construction monitor, and functions as an air flow path for building an improvement body, an air flow path for preventing clogging of the air nozzle for building the improvement body, and an air flow path for preventing the collapse of a drilled wall. The inner pipe 11 and the outer pipe 13 are connected to the compressor via an air control flow path and an apparatus having switching means.SELECTED DRAWING: Figure 1