Furukawa Electric Review No.54Development of an Analysis Method for Power Cable Creepage Phenomenon in the Duct

Koki Kashiro, Katsumi Iwamura, Tomonori Kamibayashi, Tadanori Nagayama, Hiroyasu Nishikubo

In a duct system, which is an underground cable laying system, a phenomenon called cable creepage phenomenon may occur in which the cable in the duct moves in the traveling direction of the vehicle. If this phenomenon progresses excessively, there is a concern that serious damage may occur in the vicinity of the cable joint. It is necessary to accurately grasp the moving force of the cable to solve for the phenomenon. However, in the past, studies using empirical formulas were mainly adopted, and there was a discrepancy with the actual result.
For this reason, in this research, we focused on the horizontal displacement of the duct when a vehicle passes through it, and developed a new theory using the behavior of the displacement difference between the cable and the duct at that time. In addition, an analysis system for the creepage using the theory was developed. In order to confirm the validity of the theory, we conducted a full-scale experiment and compared the experimental values with the theoretical values to reconcile the two.