摘要
皖南地区地质条件复杂,在强降雨条件下路堑边坡产生崩塌滑坡等灾害。基于皖南地区工程实例中形成的土岩二元路堑边坡,结合现场监测,采用有限元软件对皖南地区降雨前后的路堑边坡稳定性进行分析。通过模拟降雨前后两类坡率边坡在有无支护措施多种工况下进行数值计算,取得位移、应力、安全系数等大量数据进行对比。研究结果表明:支护措施与坡率在降雨前对于边坡稳定性影响较小,在降雨后对于边坡稳定性影响较大;边坡的整体失稳方式以圆弧滑动为主,边坡塑性区在坡底处最大并且从坡底处向上逐渐扩展至坡顶,潜在滑动面为边坡坡面;将坡底、一级坡坡面、坡顶定为后续现场监测敏感位置,并在工程结束后对边坡进行持续监测。
Characterized by complex geological conditions in Southern Anhui,road cut slopes in this region are prone to collapse and landslides under intense rainfall.This study investigates the stability of soil-rock composite road cut slopes in Southern Anhui through finite element modeling and field monitoring.Numerical simulations were conducted to analyze slope behavior under pre-and post-rainfall conditions,incorporating two slope ratios(1:0.75 and 1:1.0)and multiple support measures.Comparative assessments of displacement,stress,and safety factors were systematically performed.Key findings include:Support measures and slope ratios exhibit limited influence on stability under dry conditions but significantly affect post-rainfall stability;Slope failure predominantly follows a circular sliding failure mechanism,with plastic zones initiating at the slope toe and progressively extending upward,forming potential sliding surfaces along the slope face;Critical monitoring points are identified at the slope toe,primary slope surface,and crest,necessitating continuous post-construction surveillance.These results provide critical insights for slope stability management in geologically complex regions under extreme hydrological conditions.
作者
汪永锋
Wang Yongfeng(Huangshan City Comprehensive Administrative Law Enforcement Brigade of Transportation,Huangshan Anhui 242700,China)
出处
《山西建筑》
2026年第2期68-74,共7页
Shanxi Architecture
基金
2024年度安徽省交通运输行业重点科技项目(项目编号:2024-KJQD-028)
2023-2027年度安徽省交通运输重点研发储备项目(项目编号:67)。
关键词
路堑边坡
降雨
有限元分析
坡率
road cut slopes
rainfall
finite element analysis
slope ratio
