西南交通大学学报2024，Vol.59Issue(5)：1068-1077,1085,11.DOI:10.3969/j.issn.0258-2724.20220361
复杂孕灾环境下隧道进口斜坡稳定性分析与评价
Stability Analysis and Evaluation of a Tunnel Entrance Slope Under Complex Disaster-Prone Environments
摘要
Abstract
Influenced by rainfall,strong earthquakes,and intensive engineering activities,the slope at the tunnel entrance may experience collapses,landslides,debris flows,and other geological disasters,especially under the complex conditions of violent earthquakes,high geostress,abrupt slopes,and extremely cold environments.To explore the stability of tunnel entrance slopes under different working conditions in complex disaster-prone environments,the Jiarishan tunnel in southwest China was taken as an example,and a"space-air-ground"integrated investigation technology combining unmanned aerial vehicle(UAV)photography,surface trenching,laboratory experiments,field tests,and cave surveys was employed to obtain accurate engineering geological information.Typical failure characteristics of the studied slope were systematically revealed,and the two failure causes and evolution models of the slope were discussed.In addition,the slope stability under different working conditions was qualitatively analyzed using the limit equilibrium method and three-dimensional numerical simulation.The results indicate that the stability factor of the slope at the Jiarishan tunnel entrance is always greater than 1.15 under natural,rainstorm,and earthquake working conditions.Overall,the slope is stable except for the local deformation and instability of the shallow horizon of the posterior margin.This research can provide theoretical guidance and technical support for similar tunnels in terms of siting,construction,and operation safety.关键词
孕灾环境/斜坡变形/演化模式/稳定性分析Key words
disaster-prone environment/slope deformation/evolution mode/stability analysis分类
交通运输引用本文复制引用
徐正宣,林之恒,刘云鹏,聂晓芳,任利,张志龙..复杂孕灾环境下隧道进口斜坡稳定性分析与评价[J].西南交通大学学报,2024,59(5):1068-1077,1085,11.基金项目
国家自然科学基金项目(42171355) （42171355）
