1000kV特高压线路八分裂导线张力放线施工技术

Conductor Tension Stringing Construction Technology of Eight-Bundle for 1000 kV EHV Transmission Line

特高压线路8分裂导线张力放线有多种方案,常用的有"2×(一牵4)"方案、"一牵8"方案和"八牵8"等方案,每种方案的施工技术、施工机具、施工工艺都各有特点。通过"一牵8"方案与其他两种方案的比较,"一牵8"方案施工工艺简单,工效高,可降低成本10～15%;能保证8根子导线的初伸长完全相同;可减少对农田和地表植被的损坏;可减小导线的损伤,线路带电运行后,能降低电晕的电能损失、降低噪音和对电磁环境的干扰。

There are many kinds of methods for tension stringing of eight-bundle conductor in EHV transmission line, among them, 2×（one-pull-four）, one-pull-eight and eight-pulleight are most often used. Each method has its own characteristics in construction technology, machinery and process. Comparing one-pull-eight with other two methods, one-pull-eight has many of advantages, such as simple construction technology, high working-efficiency, low cost which decreased by 10%-15%,and it can also ensure the eight sub-conductors the same first strength, reduce the damage to the land,plants and conductor, lower down the energy loss of corona, noise and disturbance to the electromagnetic environment.