森林工程2025，Vol.41Issue(5)：1092-1100,9.DOI:10.7525/j.issn.1006-8023.2025.05.022
高密度电法探测输电线塔基周边多年冻土分布
Permafrost Distribution Detection Near Transmission Line Tower Foundations by Electrical Resistivity Tomography
摘要
Abstract
To analyze the degradation characteristics of permafrost surrounding the transmission tower foundations of the pump station line A 12#,14#and line B 12#,14#powering the Jagdaqi oil pump station of the China-Russia crude oil pipeline,electrical resistivity tomography(ERT)was conducted to investigate the distribution range of unfrozen area in different seasons and evaluate the protection effectiveness of furnace ash backfill measure on the permafrost.The results demonstrated that resistivity difference can effectively characterize the spatial distribution of permafrost around the tower foundations,as well as its degradation processes and the formation mechanisms of talik.Tower foundation construction caused vertical seepage-induced thermal erosion through accumulated water.The thawed permafrost and weathered lay-ers provided hydraulic channels for water seepage that led to pore water enrichment in inter-tower subsoils and low-resis-tivity characteristics in the underlying bedrock,forming interconnected talik(maximum thaw depth>28 m).Compared with line A 14#(with a thaw depth of 16 m),furnace ash backfill at line B 14#reduced the thaw depth by 1.5 m and sup-pressed lateral talik by approximately 60％,effectively slowing the talik development around foundations.These findings provide critical foundational data for developing engineering disturbance mitigation strategies and permafrost-related haz-ard prevention approaches in permafrost.关键词
高密度电法/多年冻土/输电线/基础病害/融区Key words
Electrical resistivity tomography/permafrost/power line/foundations distress/unfrozen zone分类
建筑与水利引用本文复制引用
林峻岑,李国玉,高凯,张航,苏安双,王旭,王淼..高密度电法探测输电线塔基周边多年冻土分布[J].森林工程,2025,41(5):1092-1100,9.基金项目
国家电网有限公司科技项目(5200-202230098A-1-1-ZN). （5200-202230098A-1-1-ZN）
