| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance the workability of common wire ducts by burying a plurality of cable insertion ducts, where the pipes are jointed by inserting the opposite ends thereof into each of a plurality of through holes of a joint, under the ground and then passing cables through the cable insertion ducts. SOLUTION: A trench 1 is dug in a road and a multihole joint 20 is arranged at the bend of trench 1 while a multihole joint 2 is arranged at the linear part of trench 1. A pipe 3 is inserted, at the opposite ends thereof, into the through holes of multihole joints 2, 20 and jointed with another pipe 3 thus assembling a plurality of cable insertion ducts 30. Subsequently, cables are passed through respective cable insertion ducts 30 and the trench 1 is backfilled thus burying the cable insertion ducts 30 under the ground. Since the duct can be assembled without shaking even if the trench has irregular bottom, the workability can be enhanced.</p> |
