| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pipe leading-in device that can lay a led-in object pipe smoothly underground over long distance using an existing leading-in device. SOLUTION: A pipe leading-in device 1 is provided with a cylindrical body part 11 having an outer diameter almost equal to the diameter of a led-in pipe, a connecting rod 12 axially extended almost at the center of the body part 11, a polymer tube 13 accommodated being folded in bellows shape in front of the body part 11, and a plurality of disc-like spacers 14 disposed behind the polymer tube 13 and fixed to the connecting rod 12. The end part of the polymer tube 13 is fixed in a folded state close to a borehole opening part on the arrival shaft side and led into the earth along with the led-in pipe to cover the polymer tube 13 around the led-in pipe.</p> |
