Application of Interval Field Method to the Stability Analysis of Slopes in the Presence of Uncertainties

Feng, Chengxin, Faes, Matthias, Broggi, Matteo and Beer, Michael ORCID: 0000-0002-0611-0345 (2023) Application of Interval Field Method to the Stability Analysis of Slopes in the Presence of Uncertainties. In: Geo-Risk 2023.

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Official URL: http://dx.doi.org/10.1061/9780784484999.030

Abstract

Spatial uncertainty of soil parameters has a significant impact on the analysis of slope stability. Interval field analysis is emerging as a complementary tool of the conventional random field method that can take spatial uncertainty into account. This approach has not been investigated in slope stability analysis. The present paper proposes a new method, named the interval field limit equilibrium method (IFLEM), for assessing the stability of slope in the presence of the interval field. In this method, the modified exponential function is introduced to characterize the spatial uncertainty of the interval field, and the Karhunen-Loève-like decomposition is employed to generate the interval field. Then, in a single calculation, the deterministic slope stability analyzed by the Morgenstern-Price approach is implemented in order to estimate the safety factor. Subsequently, the upper and lower bounds of the interval of safety factor are efficiently evaluated by a kind of surrogate-assisted global optimization algorithms, such as Bayesian global optimization (BGO) used in this study. Finally, the effectiveness of the proposed method is verified by the numerical example. The results indicate that the proposed method can provide reasonable accuracy and efficiency, which is potentially applicable to a number of geotechnical systems.

Item Type:	Conference or Workshop Item (Unspecified)
Divisions:	Faculty of Science and Engineering > School of Engineering
Depositing User:	Symplectic Admin
Date Deposited:	26 Oct 2023 07:36
Last Modified:	27 Apr 2024 07:18
DOI:	10.1061/9780784484999.030
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3176447