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基于FLAC3D的公路边坡稳定性及降雨入渗的影响 预览

The Stability of Highway Slope Based on FLAC3D and the Influence of Rainfall Infiltration on It
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摘要 公路边坡的稳定性是开展高速公路建设工程安全作业的前提。针对公路土质边坡易受降雨影响而产生滑坡灾害的特点,本文采用数值模拟的方法对边坡的稳定性和受降雨入渗影响程度进行评估,在模拟中设置边坡坡比1:1.0、1:1.5和1:2.0,降雨的入渗深度设置为5m,研究未降雨和降雨条件下的稳定性变化规律。结果表明,三个边坡模型在未降雨时比较稳定,降雨条件下稳定性安全系数明显下降;降雨入渗后不同坡比公路边坡数值模型的破坏模式存在较大差别,坡比为1:2.0的模型在降雨入渗后形成了较完整的滑动面,滑坡隐患明显;建议在公路边坡施工过程中,加强坡面防护和适当控制开挖坡比以提高公路土质边坡的整体稳定性。 The stability of highway slope is a prerequisite for the safety of engineering.In view of characteristics that the slope soil is easily affected by rainfall to result into a landslide disaster,this paper evaluated the slope stability with numerical simulation and the influence degree of rainfall infiltration on it.During working,the slope ratios(1:2.0,1:1.5 and 1:1.0)were set up and the infiltration depth of the rainfall was set up as 5 m to explore the various laws of stability under rainfall and non-rainfall.The results showed that three different slopes were more stable at non-rainfall,however the stable factors significantly went down at a rainfall.There were a significant difference between failure modes of highway slope numerical models with different slope ratios after a rainfall infiltration,the model with slope ratio 1:2.0 had a distinct landslide trouble because of soil slide after rainfall infiltration.It was suggested that the overall stability of the slope of open-pit mines should be improved by strengthening slope protection works and properly controlling slope excavation in two aspects.
作者 秦浩 余洁 QIN Hao;YU Jie(Architecture Zabor University of Shannxi Province,Xi’an 710048,China;Northwest Electric Power Design Institute Co.,Ltd.,Xi’an 710032,China)
出处 《山东农业大学学报:自然科学版》 北大核心 2019年第2期244-246,共3页 Journal of Shandong Agricultural University (Natural Science Edition )
关键词 FLAC3D 公路边坡 稳定性 降雨 FLAC3D highway slope stability rainfall infiltration
作者简介 秦浩(1983-),男,硕士,讲师,研究方向:建筑结构,施工技术,高职教育. E-mail:qinhao0905@163.com.
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