| 永吉高速公路黑潭坪边坡三维稳定性研究 |
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| 引用本文： | 尹剑辉.永吉高速公路黑潭坪边坡三维稳定性研究[J].地质与勘探,2015,51(6):1187-1192. |
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| 作者姓名： | 尹剑辉 |
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| 作者单位： | 中国科学院地质与地球物理研究所,北京；兰州大学，甘肃兰州 |
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| 摘 要： | 通过对永吉高速公路黑潭坪边坡的野外调查,详细地了解了研究区工程地质条件,探讨了边坡变形破坏机理,结合室内试验和计算反演获取岩土体强度参数,在此基础上建立三维地质模型,运用FLAC3D数值分析软件采用强度折减法对不同工况下的坡体稳定性进行详细分析并提出治理建议。研究表明:(1)边坡变形破坏是内外因素综合作用的结果,岩土体性质不良是边坡变形破坏的内在因素,坡脚便道开挖和地表水下渗是边坡变形破坏的诱导因素;(2)强度折减法应用于边坡三位稳定性分析具有较好的适用性;(3)数值模拟显示采用削坡结合锚固的综合治理措施具有明显的效果。
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| 关 键 词： | 边坡工程 稳定性分析 强度折减法 数值计算 |
| 收稿时间： | 2015/3/30 0:00:00 |
| 修稿时间： | 2015/10/19 0:00:00 |
Three-dimensional analysis of slope stability: A case study of the Heitanping slope at the Yongji highway |
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| Yin Jian-hui.Three-dimensional analysis of slope stability: A case study of the Heitanping slope at the Yongji highway[J].Geology and Prospecting,2015,51(6):1187-1192. |
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| Authors: | Yin Jian-hui |
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| Institution: | Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing; Lanzhou University, Lanzhou, Gansu |
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| Abstract: | Field investigations reveal the engineering geological conditions of the Heitanping slope at the Yongji highway. The mechanism of slope deformation and failure are further studied, and strength parameters of rock and soil mass are acquired by laboratory tests and inversion calculation. Then a geological model of three dimensions is built and the slope stability in different working conditions are analyzed in detail using the software FLAC3D for numerical stimulation based on the strength reduction method. The results show that both internal and external factors play an important role in the progressive failure of the slope, i.e. it is a comprehensive phenomenon for the slope deformation and failure. The poor quality of rock and soil mass properties are internal factors, while the excavation of the slope toe as well as the rain infiltration are induction factors. It is appropriate to analyze the stability of a three dimensional slope based on the strength reduction method. The results of numerical stimulation indicate that cutting and unloading combined with prestressed anchor cable sash are a good method to prevent potential landslides. |
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| Keywords: | slope engineering slope stability analysis strength reduction method numerical analysis |
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