| 摘要 |
PURPOSE:To provide the curve jacking method and propulsion supporter generating no local stress concentration on the end face of a buried pipe, capable of preventing the breakage of the buried pipe, generating no V-shaped gap between end faces of the buried pipes, requiring no sealing work, and applicable to a small-diameter buried pipe 8. CONSTITUTION:Propulsion supporters 20 provided with direction changing means 30, 40 in the middle of the axial direction are connected in sequence behind a leading body 10, a buried pipe 60 provided with a flexible section 64 in the middle of the axial direction is inserted into the propulsion supporter 20, and the front section 60a and the rear section 60b of the buried pipe 60 are held and fixed to the front section 20a and the rear section 20b of the propulsion supporter 20 by a holding/fixing means such as an expansion system 50 provided on the propulsion supporter 20. Propulsion force is applied to the propulsion supporters 20 while the propulsion supporters 20 and the buried pipe 60 are bent at a preset angle, and the buried pipe 60 is curvedly propelled. |
