| 摘要 |
PURPOSE:To enable the successive burying in a planned line by pushing a pipe burying device in a process of changing the relative position between a guiding pilot pipe and the pipe burying device by an orbit correcting device according to an error quantity. CONSTITUTION:A plurality of guiding pilot pipes 21 connected according to the pushing are extended through from a start pit 10 to an arrival pit 11 by a minor aperture pusher, and its top end 21a is protruded into the arrival pit 11. On the start pit 10 side, the top end part 30a of an orbit correcting device 30 is fitted and connected to the rear end part 21b of the guiding pilot pipe 21. Then, the top end part of the cylinder 61 of a pipe burying device is hinge- connected by a ring joint 39 to a stepped drum 38 rear part fitted and fixed to a thrust transmitting rod 33 of the device 30. Further, the device 30, the device 69 and a buried pipe 63 are pushed to the arrival pit 11 side by a rear pushing jack 22, with the buried pipe 63 being connected to the rear end side 62. In this case, the pipe 21 is dislocated from a planned line, but this dislocation has been already measured, and the buried pipe is buried by correcting it. |
