| 摘要 |
PROBLEM TO BE SOLVED: To dispose a communication line without damaging a pipe port in a crossing pipe of an inverted siphon part of a sewer pipeline, and reliably perform the work of measurement of deposits in the crossing pipe or cleaning, etc., through the communication line.SOLUTION: A pipe port protection part comprising a bent part is provided in the lower end, and a rail material with a guide path of the communication line formed in the longitudinal direction is set up along the wall surface of the vertical hole facing each other while making the pipe port protection part face the pipe port of the crossing pipe, and the communication line (wire) is disposed along the rail material. Then, a predetermined tension is introduced into the communication line by a winch of a ground part, and moved along a work body to perform the work. |
