500kV大胜关长江大跨越输电线路导地线换线施工

Construction of change line between conductor and grounding wire for Dashengguan Yangtze River crossing of 500 kV transmission line

介绍了大胜关长江大跨越二期工程导地线的换线施工方法,即采用旧地线"一牵一"张力牵引光缆过江,采用旧导线"一牵一"张力牵引D26牵引绳过江、D26牵引绳"一牵二"张力牵引新导线过江。针对大跨越不封航换线施工时所涉及到的主要施工难点,提出了相对应的解决方法,对今后类似的大跨越改造工程有积极的指导作用。

The construction method of change line between conductor and grounding line for phase 2 of Dashengguan Yangtze River crossing project was introduced, which is to adopt old grounding wire ＂one by one＂ to pull optical cable crossing river with the tension, to adopt old wire ＂one by one＂ to pull D26 tug crossing river with the tension and D26 tug ＂two by one＂ to pull the new wire crossing river with the tension. According to the major construction difficulty concerned with continuing navigation during the change line construction of river crossing, the relative solution is put forward, which has positive guidance role for the similar river crossing project in the future.