PURPOSE: To obtain a drawing-in method of a buried pipe, which is excellent in safety after construction and in the workability and also by which the drawing-in work of buried pipes can be carried out even in a narrow space.
CONSTITUTION: A gas-liquid election nozzle is equipped in advance at the front end of a driving pipe 4 and an enlarging reamer 15 to widen a hole 50 in the underground formed by the driving pipe 4 is jointed to the front end of the driving pipe 4. After a buried pipe 11 has been connected to the enlarging reamer 15, the inner face of the hole 50 in the underground is excavated by the reamer 15 while a gas-liquid mixture 45 including an unguent is sprayed from a gasliquid spray nozzle 33 to the enlarging reamer 15. The gas-liquid mixture 45 and the excavated waste soil 16 are removed while sucking to the outside of the underground through the space in the buried pipe.
| JP2922498 | [Title of Invention] Two-stage tunnel excavator |
| JP2006336318 | HORIZONTAL HOLE EXCAVATING DEVICE |
OSHIMA TAKASHI
HATTORI MASAYA
KAWABATA TOMOMASA
