Research purposes: The section from Changdu to Linzhi of Sichuan-Tibet Railway is located in the squeezed collision zone between the Indian plate and the Eurasian plate. This study area has complex terrain and geological conditions, such as high altitude, large elevation difference, steep terrain, perennial snow coverage. It is very difficult, poor in efficiency and low in precision to obtain geological information using traditional survey methods. Therefore, this paper uses "Space-Air-Ground" multi-source comprehensive survey technology, which not only can identify the geological factors affecting and controlling the route plan quickly and efficiently, but also can guide the planning of traffic corridors. At the same time, it can provide a reference for the survey of linear engineering in similar complex and difficult mountainous areas of the plateau.
Research conclusions: (1) Based on multi-source optical remote sensing, combined with GPS deformation monitoring technology and deep earth electromagnetic detection, it constructed a crustal stability safety corridor. (2) Through thermal infrared remote sensing technology, it can quickly delineate the surface geothermal anomaly area. Based on the aforementioned results, the representative drilling is carried out to verify the precision of the interpretation data. Finally, it can find a low-temperature corridor. (3) Multi-source, high-resolution, three-dimensional optical remote sensing technology is used to plan the macro mountain disaster safety corridors; and then InSAR time-series deformation monitoring and drone survey technologies are used to optimize the mountain disaster safety corridors locally, especially in the important parts of the river valley and major mountain disaster bodies. (4) Adopting the "Space-Air-Ground" multi-source survey technology and using the combination of different survey methods, it can build the multi-source survey technology system for the Sichuan-Tibet Railway traffic safety corridor. (5) It has application and promotion value in the study of linear traffic corridor planning in difficult and complicated plateau mountainous areas, such as railways, highways, water delivery tunnels.