| 摘要 |
PROBLEM TO BE SOLVED: To reduce the workload and cost of an overhead wire construction.SOLUTION: An overhead wire construction method for a branch steel tower 100 that supports three-way overhead transmission wires 111a to 111c all of which are connected to an existing jumper wire 120 and has overhead earth wires 113a to 113c comprises a step of removing the existing jumper wire from each overhead transmission wire, a step of connecting at least any two overhead transmission lines 111a, 111c by a length-adjustable temporary jumper device 10 comprising plural jumper wires 11, 12 whose end portions are overlapped with each other and joined to each other, a step of removing the temporary jumper device after the overhead transmission wires or the overhead earth wires are exchanged, and a step of re-connecting the three-way overhead transmission wires by the existing jumper wire or a novel jumper wire. |
