| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a conduit material, for a cable, which deals sufficiently with uneven settlement and vibration, whose working efficiency at a site is high, by which a working environment is made good and by which a posterior cleaning operation and a finishing treatment are performed easily. SOLUTION: The own weight of a conduit material 1 for a cable on one side is applied, via a slope 6 which is directed downward, to a slope 5 formed so as to correspond to the slope 6 on a conduit material 1 for a cable on the other side, and the close contact degree of their edges is increased. In addition, water is then supplied to a water-dilatable water shutoff material 9 so as to be swollen. Then, the close contact degree of their joining parts is increased more due to the interaction between a downward weighting operation from the downward directed slope 6 and the upward expansive force of the water- dilatable water shutoff material 9 existing on the slope, and the watertightness of a joining structure becomes more perfect.</p> |
