Probabilistic slope analysis considering the cross-correlation among soil properties of mountain slopes in South Korea

IF 6.9 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-03-10 DOI:10.1016/j.enggeo.2025.108014

Sung-Ha Baek , Taeho Bong

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引用次数: 0

Abstract

The uncertainty of soil properties and their cross-correlations play significant roles in probabilistic results, emphasizing the need to consider rational and accurate values. In this study, the cross-correlations among soil properties (cohesion, friction angle, and unit weight of soil) were identified using data obtained from 100 ground surveys conducted on natural mountain slopes, confirming a strong correlation among the key soil parameters in the slope stability analysis. Their cross-correlations were discussed in comparison with previously reported values, and a valid correlation matrix with internal consistency was established. To assess the influence of spatial variability of soil properties and their cross-correlation, a probabilistic analysis of slope stability was conducted, and a sensitivity analysis was conducted to measure the relative contribution of the variability in soil properties to the uncertainty in the factor of safety for slope stability. Consequently, the cross-correlations among soil properties are crucial for deriving reliable results. In particular, although the variability of the unit weight of soil and its correlation with other soil properties have often been ignored, considering these factors and establishing the correct correlation matrix have a significant effect on the results of probabilistic analysis. Additionally, the results of sensitivity analysis indicated that the sensitivity of soil properties to the factor of safety for slope stability was significantly influenced by their cross-correlation matrix.

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考虑到韩国山地斜坡土壤特性之间的交叉相关性的概率斜坡分析

土壤性质的不确定性及其相互关系在概率结果中起着重要作用，强调需要考虑合理和准确的值。在这项研究中，利用在自然山坡上进行的100次地面调查数据，确定了土壤性质（黏聚力、摩擦角和土壤单位重量）之间的相互关系，证实了边坡稳定性分析中关键土壤参数之间的强相关性。将它们的相互关系与先前报道的值进行了比较，并建立了具有内部一致性的有效相关矩阵。为了评估土壤性质空间变异性及其相互关系的影响，对边坡稳定性进行了概率分析，并进行了敏感性分析，以衡量土壤性质变异性对边坡稳定安全因素不确定性的相对贡献。因此，土壤性质之间的相互关系对于得出可靠的结果至关重要。特别是，虽然土壤单位重量的变异性及其与其他土壤性质的相关性经常被忽略，但考虑这些因素并建立正确的相关矩阵对概率分析的结果有重要影响。敏感性分析结果表明，土壤性质对边坡稳定安全系数的敏感性受其相互关系矩阵的显著影响。

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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.