冲沟发育地段输电线路塔位选择及处理

Selection and Treatment of Transmission Line Tower Position in the Gully Development Areas

西昌螺髻山地区为架空输电线路主要通道,具有特殊的岩土条件和气候条件,致使冲沟发育,冲沟问题突出。本文通过某500 k V输电线路为例,对冲沟成因、类型进行分析和历史对比,分析其分布特征和发育特点,总结冲沟地段架空输电线路塔位选择及岩土工程处理措施。研究表明:西昌螺髻山地区冲沟大多处于平衡剖面与衰亡阶段;冲沟地段山脊整体稳定性优于斜坡;输电线路塔位宜选择在山脊衰亡阶段的冲沟段;平衡剖面阶段的冲沟段宜采取适宜的岩土工程措施;宜避开切沟阶段的冲沟。

Luoji mountain area,Xichang is the main channel of overhead transmission line.It has special geotechnical conditions and climatic conditions,sothe gullies grow well and the gully problem is outstanding.This passage takes a 500 k V transmission line as an example.It contrasts the causes,types and historical of gullys,and analysis the distribution and development characteristics,then summarizes the position selection of overhead transmission line tower and geotechnical measures.Research shows that the most of gullies of Luoji mountain area,Xichang are in balanced section and decline stage;the stability of the mountain ridge in gully areas is better than that in slope;the transmission towers should be chosen in the gully section of the ridge decline stage;appropriate geotechnical engineering measures should be taken to deal with the gullies of the balanced section; the gullies in stage of cutting down should be avoided.