| 摘要 |
PURPOSE:To make it possible to execute with less manpower and at low cost without depending on an open cut system by pulling back a tooling pipe passing through between longitudinal holes provided to the ends of a pipe line, and at the same time, by pulling a flexible buried pipe coupled with one end thereof into a horizontal hole. CONSTITUTION:A tooling pipe 7a is driven forward and passed through from a longitudinal hole 3 provided to the other end side of a pipe line toward a longitudinal hole 3' of one end side of the pipe line by means of an excavating propeller 4 to form a piping horizontal hole 7. After that, a flexible metallic buried pipe 1 provided with many bellows 1b at a certain interval is coupled with the tip of the tooling pipe 7a. Then, the tooling pipe 7a is pulled back by the excavating propeller 4, and at the same time, the buried pipe 1 is pulled into the horizontal hole 7 to pipe. According to the constitution, there is no need to excavate the ground, a construction term is shortened, a cost is reduced, and at the same time, security after piping can be secured. |
