| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laying method for pipes through which construction man-days can be reduced by leading new pipes in a hole simultaneously with excavation and propulsion and a reactive force from the earth generated during the drawing-in work can be replaced with a propulsion. SOLUTION: In this method, a propulsion means 4 is actuated from the ground level to the underground and a PE pipe corresponding to a new pipe is inserted in a propulsion hole formed by the propulsion means. One end of the PE pipe 1 wound on the ground is integrally joined at the backward position of the propulsion means 4, in a propulsion head 5 having a built-in drive source for the thrusting means 4, and the pipe is driver by propulsion while holding a part of the PE pipe 1. In this way, the PE pipe 1 is led into the underground simultaneously with the propulsion of the propulsion means 4.</p> |
