摘要
Abstract
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.关键词
复杂艰险山区/拟建铁路/地质环境/综合勘察/关键技术/风险分析/对策措施Key words
complex and hazardous mountainous regions/proposed railway/geological environment/integrated survey/key technologies/risk analysis/countermeasures分类
交通工程
