甘肃临夏输电线路走廊黄土典型坡体结构与灾害特征分析OA

Transmission lines are playing an increasingly important role in China's national economy and social security.After the rainy sea-son in the loess areas of Northwest China,the slopes of transmission line tower foundations are often destabilized by geological disasters,which seriously endangers the safety and stability of the power grid.Traditional survey,design and disaster prevention of transmission lines in loess slope sections focus on on-site positioning,lacking an overall understanding of the slope structures in the route area.To clarify the typi-cal loess slope structures and their disaster characteristics,taking the transmission line projects in Linxia area as the research case,this paper adopted the methods of high-resolution remote sensing image discrimination and field verification to analyze the image discrimination markers of different strata and slope structures.A specific transmission line corridor was selected to verify potential slope disasters in key sections,thus revealing the disaster characteristics of different slope structures in Linxia area.The results show that the typical slope landslide disasters in the transmission line corridor of Linxia area are mainly divided into three types:loess-mudstone landslides,intra-loess landslides and mudstone layer creep.Based on Gaofen-2 remote sensing images,a disaster identification system for transmission line slopes was established,the remote sensing discrimination markers of different strata and slope structures in the image area were analyzed,and the potential slope dis-asters in key sections of a specific transmission line corridor were identified and verified,forming a disaster distribution map.This research can lay a theoretical foundation and accumulate engineering basic data for the subsequent establishment of remote sensing rapid discrimination theory,standard atlas and AI remote sensing identification technology in this area.