| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cut-off method for a lateral port cutting off the lateral port for a buried main pipe from a water, by fully securing a drawing distance of the tip of a rehabilitation pipe and capable of shortening the working time and simplifying the rehabilitation works. SOLUTION: A tip tool 53 of the rehabilitation pipe is locked to a wire 54, which is lead from a buried main counter-side into the inside of the lateral 4, while being guided by a guide roller 61 fitted to the lateral port 31 of the buried main 3 and pulls the wire, so as to draw the rehabilitation pipe till it abuts against the guide roller. The guide roller is moved to a side of a downstream side manhole Q2 of the buried main with the wire, the rehabilitation pipe is further drawn by the moving distance of the guide roller so as to secure drawing allowance of the rehabilitation pipe, the rehabilitation pipe is heated by introducing steam inside the rehabilitation pipe, and then the rehabilitation pipe is pressurized and inflated, so as to be closely lined to the inside of the lateral. The drawing allowance of the rehabilitation pipe is turned up and is stuck tightly to the circumference of the lateral port of the buried main, to cut off the lateral port from water.</p> |
