铁道标准设计2025，Vol.69Issue(5)：64-72,9.DOI:10.13238/j.issn.1004-2954.202409110005
高速铁路隧道洞口斜坡变形综合整治研究
Study on Comprehensive Remediation of Slope Deformation at Tunnel Portals of High-speed Railways
摘要
Abstract
If reasonable protective measures are not taken during construction,rainfall,earthquakes,and other actions,the slope at the tunnel portals of high-speed railways is highly prone to geological disasters such as cracking,landslides,or even collapse,posing a threat to the safety of railway operations.Taking the slope at a tunnel portal of a high-speed railway in a mountainous area of western China as an example,the deformation characteristics and mechanisms of the slope were thoroughly analyzed through geological surveys,on-site monitoring,and theoretical analysis methods.The location of the sliding surface was determined,its parameters were inverted,and the thrust of the main axis cross-section of the slope was calculated.On this basis,a comprehensive remediation scheme for the slope of the tunnel portal was proposed,and its effectiveness was verified through numerical simulations.The results showed that after the protective measures were implemented,the slope at the tunnel portal developed multiple cracks on the surface under extreme weather conditions.Over time,surface displacement continued to develop,and the slope was in a creeping stage.The primary cause of the slope creep was the thick layer of fully to strongly weathered Silurian mica schist interbedded with carbonaceous schist,which had poor mechanical properties and was softened by prolonged rainwater erosion,reducing the slope stability.Additionally,excavation caused the slope to form a free face,weakening its natural bearing capacity.A comprehensive remediation scheme was proposed,and after reinforcement,slope deformation was effectively controlled,significantly improving slope stability.关键词
高速铁路/隧道洞口/斜坡变形/稳定性分析/综合整治Key words
high-speed railway/tunnel portal/slope deformation/stability analysis/comprehensive re-mediation分类
交通运输引用本文复制引用
纪文利,何晓龙..高速铁路隧道洞口斜坡变形综合整治研究[J].铁道标准设计,2025,69(5):64-72,9.基金项目
陕西省高速铁路地质路基创新团队科研项目(2022KY35YB-O5PT) （2022KY35YB-O5PT）
