格尔木—拉萨±400 kV直流输电线路工程沿线平均海拔为4 650 m。基于该工程，针对青藏高原冻土地区输电线路基础施工的特点和难点，研究杆塔基础施工关键技术，并提出了相应的基础施工方案，可为我国高海拔冻土地区输电线路施工提供参考。

The average elevation of ±400 kV DC Golmud-Lhasa transmission line project is 4 650 m. Based on this project, according to the characteristics and difficulties of foundation construction in plateau frozen soil district in Tibetan, this paper studied the key technologies of tower foundation construction, and suggested some foundation construction schemes, which could provide references for other transmission line constructions in plateau frozen soil district in China.