| 基于降雨下最不利深度的多级边坡平台宽度研究 |
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| 引用本文： | 胡亚坤,彭文丹.基于降雨下最不利深度的多级边坡平台宽度研究[J].路基工程,2021,0(1):84-90. |
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| 作者姓名： | 胡亚坤 彭文丹 |
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| 作者单位： | 中国华西工程设计建设有限公司,成都610036;西南交通大学地球科学与环境工程学院,成都611756;中国建筑西南勘察设计研究院有限公司,成都610051 |
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| 摘 要： | 合理的平台宽度是设计多级边坡的重要前提。利用刚体极限平衡法和渗流数值模拟，并结合浅层土质边坡的破坏模式，揭示了降雨情况下浅层土质边坡的稳定性系数分布形式，提出了一种考虑降雨的多级边坡平台宽度的设计方法，并对影响多级边坡平台宽度的因素进行了分析。研究结果表明:降雨情况下浅层土质边坡的稳定性系数与滑面距坡表的垂直距离关系曲线近似成勺形；平台宽度分别随着黏聚力增加和内摩擦角降低线性增加，而随着坡率增加逐渐减小。
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| 关 键 词： | 多级边坡 降雨 最不利深度 平台宽度 稳定性系数 |
| 收稿时间： | 2020-03-13 |
Study on Stage Width of Multi-stage Slope Considering the Most Unfavorable Depth under Rainfall |
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| Abstract: | The reasonable stage width is an important prerequisite for the design of multi-stage slope. Herein by use of rigid body limit equilibrium method and numerical simulation of seepage, and depending on the failure mode of shallow soil slope, the distribution form of the stability coefficient of shallow soil slope under rainfall was revealed, and a method designing the stage width of the slope considering rainfall was proposed with the factors influencing the width analyzed. The results show that, in case of rainfall, the curve of relation between the stability factor of shallow soil slope and the perpendicular distance from the slide face to the slope surface presents approximately spoon shape; the stage width increases linearly as the cohesion increases or the internal friction angle decreases respectively, while it gradually decreases as the slope ratio increases. |
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