Abstract:Based on remote sensing interpretation and geological disaster investigation, and taking the transmission corridor in deep cut canyon area of Dadu River from Erlang Mountain to Zheduo Mountain as research object, the development characteristics of geological disasters in this area and the impact on power transmission and transformation projects are studied. The results show that the main controlling factors for the formation of disasters in this area include topography, slope orientation, geological structure, engineering geological petrofabric and annual rainfall, etc. Geological disasters in this area are mainly distributed at elevations below 2200 m, with slopes ranging from 15° to 50°. Collapses are mainly developed in hard or relatively hard rocks, and landslides are developed in soft hard interbedded rock masses. Collapses and landslides are mainly distributed in areas with rainfall ranging from 834 to 965 mm, and debris flows are mainly distributed in areas with rainfall ranging from 892 to 1085 mm. So, the current geological disasters along the transmission corridor in deep cut canyon area of Dadu River from Erlang Mountain to Zheduo Mountain pose a threat to the stability of towers and its foundation of power transmission and transformation projects. The research results can provide a theoretical basis for the evaluation and prevention of geological disasters along the transmission corridor, and provide a technical guidance for the planning, route selection, design and construction of power transmission and transformation projects.