Abstract: [Purposes]The Chengdu-pengzhou aviation oil pipeline passes through plains,hills,low mountains and other landforms,with a large terrain span.Geological disasters such as landslides and water damage occur frequently.Therefore,early identification of geological hazards along the pipeline is of great significance for ensuring the safe operation of the pipeline.[Methods]Aiming at the complex terrain along the pipeline route,this paper proposes a multi-factor-based method for hazard identification along pipelines.By integrating slope,aspect,and the side-looking imaging characteristics of SAR satellites,visibility models for both ascending and descending orbit images are constructed.This approach helps to delineate optimal zones for geohazard interpretation,thereby enhancing both the accuracy and efficiency of the identification process.[Findings]This paper conducts experiments based on Chengdu-pengzhou aviation oil pipeline in Longquanshan as the research area.The experimental results show that the combined lifting orbits can effectively extract deformation information along the pipeline,and carry out geological hazard identification along the pipeline through comprehensive multi-factor analysis of InSAR visibility of the lifting orbit.Compared with single-track disaster identification,the effective visible area of the combined lifting rail can be increased to 92.367%.More conducive to the effective identification of disaster hazards in the study area.According to the time series characteristics of surface deformation,landform and optical image consensus,26 hidden points are identified.[Conclusions]The research shows that this method can effectively identify the potential geological hazards along the pipeline,and can provide reference for the prevention and control of geological hazards along the pipeline.

Key words: aviation oil pipeline, geological hazards, hazard identification, multiple factors, SBAS-InSAR