拟建山区铁路极端复杂环境特征及关键地质问题探索OA

The proposed mountain railway traversed the convergence zone of three major mountain ranges at the western margin of the Qinghai—Tibet Plateau,where tectonic activity was intense and the engineering geological environment was highly complex,resulting in exceptionally high construction difficulty and risk.Analysis revealed that the route was characterized by extreme topographic relief,harsh climatic conditions,frequent seismic activity,and recurrent geological hazards.The railway faced critical engineering geological challenges,including major surficial geological hazards,active faulting,and rock mass deformation under high in-situ stress.The results show that:an integrated"space-air-ground"survey system has been established and implemented.The accuracy and efficiency of identifying major adverse geological conditions have been significantly improved through a three-step methodology,i.e.regional scanning via satellite remote sensing,detailed airborne geophysical surveying over key areas,and ground-based field investigation and drilling for validation at critical points.This approach can significantly enhance precise delineation of the distribution of unfavorable geology,surrounding rock characteristics,and in-situ stress conditions,leading to graded and categorized engineering countermeasures.