| 基于正交法的边坡安全系数敏感性分析 |
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| 引用本文： | 石坚,陈鹏冲,陈倩倩,陈波.基于正交法的边坡安全系数敏感性分析[J].路基工程,2017,0(2):33. |
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| 作者姓名： | 石坚 陈鹏冲 陈倩倩 陈波 |
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| 作者单位： | 1.长安大学建筑工程学院, 西安 710061 |
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| 摘 要： | 为研究影响边坡稳定因素，运用有限元软件ANSYS，并结合强度折减法建立合理模型，选择失稳判据为计算不收敛，将影响边坡稳定的主要因素重度、内摩擦角、黏聚力、变形模量、坡顶荷载采用正交分析法水平组合，进行各因素敏感性和显著性分析。结果表明:各因素敏感性依次为:内摩擦角 黏聚力 重度 坡顶荷载 变形模量，显著性为:内摩擦角、黏聚力，重度对边坡稳定性影响高度显著，变形模量与坡顶荷载对边坡稳定性影响不显著；黏聚力和重度之间有交互作用，因此，边坡稳定除考虑土抗剪强度影响，还应注意重度影响，使强度储备发挥到最大，同时还要考虑黏聚力和重度的交互作用。
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| 关 键 词： | 边坡稳定 影响因素 强度折减法 正交分析 敏感性 显著性 |
| 收稿时间： | 2019-11-06 |
Analysis on Sensibility of Slope Safety Factor Based on Orthogonal Method |
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| Abstract: | To study the factors influencing the slope stability, the sensibility and significance of the factors is analyzed by using the finite element software ANSYS combining with strength reduction method, establishing reasonable model, selecting the calculation misconvergence as the instability criterion and horizontally grouping the main factors influencing the slope stability including gravity, internal friction angle, cohesion, modulus of deformation and slope top load with orthogonality analysis method. The results show that the sensibility of the factors in a descending order is:internal friction angle cohesion gravity slope top load modulus of deformation. The internal friction angle, cohesion and gravity have significant influence on the slope stability; the modulus of deformation and slope tope load has non-significant influence on the slope stability; the cohesion interacted with the gravity. Hence, except the soil shearing strength, the gravity should be also considered for the slope stability to give full play to the strength reserve. Meanwhile, the interaction between cohesion and gravity should also be considered. |
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