摘要
Abstract
Taking a specific expressway project as a case study,this paper conducted extensive specialized research.Iterative feedback and mutual validation were achieved through dedicated investigations of coal seam mined-out areas,integrated geophysical prospecting techniques,tunnel risk assessments,and drilling operations.Considering the geological characteristics of different sections and the applicable scope of geophysical methods,novel super-high-density electrical methods and magnetotelluric methods were employed respectively for subgrade and tunnel site detection and interpretation.Based on the identification of eight major safety hazards for a specific tunnel(portal instability,karst cave hazards,collapse,water/mud inrush,gas disasters,goaf subsidence,structural failure,and operational fire),this paper determined the initial and residual risk levels for individual risk events and the overall tunnel structure.The findings from the tunnel safety risk assessment were then applied to guide geological route selection.关键词
复杂山区/高速公路/地质选线/煤层采空区/调查勘探/风险评估/方案比选Key words
complex mountainous areas/highway/geological route selection/coal seam mined-out areas/investigation and exploration/risk assessment/scheme comparison and selection分类
交通工程
