| 摘要 |
PROBLEM TO BE SOLVED: To provide a propulsion pipe for preventing strong backing force of pushing back a propulsion pipe column to a start shaft side when connecting the propulsion pipe during propulsion construction.SOLUTION: The propulsion pipe for backing prevention is a propulsion pipe 1 used for preventing backing that the propulsion pipe column is pushed back to the start shaft side by a water pressure or a soil pressure acting on a boring machine face plate at a distal end when connecting the propulsion pipe made of reinforced concrete during propulsion, and is configured by fixing an annular reinforcing plate 4 having a prescribed length in a propulsion direction to a concrete outer peripheral surface at the back of the propulsion pipe 1 so as to have the almost same diameter as an outer diameter of the propulsion pipe 1. |
