Application of Digital Geotechnical Investigation Technology in the Power Transmission Line Project of the Qamdo to Nyingchi Section of the Sichuan-Tibet Railway

The power transmission line project of Qamdo to Nyingchi section of Sichuan-Tibet Railway is characterized by large altitude difference, extremely steep slope, multi-hazard, high sensitivity and no man's land, which makes the geotechnical investigation and design of the transmission line extremely difficult. Southwest Electric Power Design Institute Co. Ltd (SWEPDI) adopts self-developed database management program (Geo-line) and field geotechnical investigation mobile data acquisition program (Duo cai APP) to carry out digital integration, collection, interaction, statistics and output in the whole process of geotechnical investigation, greatly improving work efficiency, and the problem of quality management and remote coordination of transmission line geotechnical investigation under extreme working conditions and complicated geological environment is solved. Based on the results of digital investigation, the grading scoring system for tower site suitability in deep-cut canyons is further studied, and the geotechnical engineering quantitative evaluation method based on big data is explored.