成仁高速红层分布区开挖边坡变形特征及机制

发布时间：2018-07-08 11:05

本文选题：红层 + 路堑边坡　；参考：《煤田地质与勘探》2017年02期

【摘要】：四川盆地红层分布广泛,其特殊的工程特性常导致严重的地质灾害。通过分析成仁高速文宫连接线边坡的变形破坏特征,得出边坡在开挖和降雨的影响下破坏机制为蠕滑—拉裂。进一步用FLAC3D进行数值分析,显示开挖卸荷和降雨影响导致滑坡灾害,其后缘发生拉裂破坏,并引发滑坡前部发生剪切滑移破坏。针对该类型的边坡,开挖后应对路堑以上部分及时采取加固措施,避免降雨入渗软化土体,加剧滑坡变形破坏。
[Abstract]:The red beds in Sichuan Basin are widely distributed and their special engineering characteristics often lead to serious geological disasters. By analyzing the deformation and failure characteristics of Chengren high-speed Wengong connecting line slope, it is concluded that the failure mechanism of slope under the influence of excavation and rainfall is creep and tension crack. Further numerical analysis with FLAC3D shows that excavation unload and rainfall influence lead to landslide disaster, and lead to shear slip failure at the front of the landslide. For the slope of this type, reinforcement measures should be taken in time after excavation to avoid rainfall infiltration to soften soil mass and aggravate landslide deformation and destruction.
【作者单位】：地质灾害防治与地质环境保护国家重点实验室(成都理工大学);四川蜀通岩土工程公司;
【分类号】：U412.22;P642.22

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