| 摘要 |
PROBLEM TO BE SOLVED: To enable a propelling direction of a pipe to be corrected when the pipe propelling direction deviates from the planned propelling direction, while installing the pipe underground.SOLUTION: In a pipe installation method that installs a pipe underground by propelling the pipe using a pipe installation device 1 provided with a support body that rotatably supports a rotary excavation body 46, a pipe (a leading pipe 6) that has a through-hole 6H formed on at least one of surface plates is used, and natural ground pressing means (an upper left side jack 80A1 and others) is provided that is connected to the support body and moves the pipe in a direction away from a natural ground 99 by reactive force from pressing of the natural ground through the through-hole. When a propelling direction of the pipe deviates from a planned propelling direction F1, the pipe is moved in the direction away from the natural ground by the reactive force from pressing of the natural ground 99 through the through-hole 6H. The propelling direction of the pipe is changed by propelling the pipe after inserting interval maintaining means (a camber 90) between an outer surface of the pipe deviated away from the natural ground and the natural ground through the through-hole 6H, for maintaining the interval between the ground and the outer surface of the pipe.SELECTED DRAWING: Figure 7 |
