Probabilistic analysis for excavation stability in spatially variable soil based on upper bound method

IF 5.3 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Computers and Geotechnics Pub Date : 2024-09-20 DOI:10.1016/j.compgeo.2024.106769

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Abstract

The limit analysis incorporated with the random field theorem is an effective approach for the probabilistic analysis of geotechnical engineering stability. A failure mechanism for excavation stability analysis in spatially variable soil, which is combined with random field theory with rotational failure mechanism of excavation is proposed. Random distribution of soil shear strength parameters is readily generated with the proposed approach, thereby enabling efficient and accurate estimation of the failure probability of an excavation. Through an illustrative example, the feasibility of combining random field with rotational failure mechanism is verified. Through several practical engineering cases, the rationality of probability analysis results is verified. Parametric sensitivity analysis is performed with Monte Carlo method to investigate the effects of each factor on the failure probability of an excavation in spatially variable soil. The results show that the proposed failure mechanism of excavation in spatially variable soil provides the reasonable failure probability calculation results for engineering practices.

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基于上界法的空间可变土壤挖掘稳定性概率分析

结合随机场定理的极限分析是岩土工程稳定性概率分析的有效方法。结合随机场理论和开挖旋转破坏机理，提出了一种用于空间可变土体开挖稳定性分析的破坏机理。利用所提出的方法，可轻松生成土壤剪切强度参数的随机分布，从而高效、准确地估算开挖破坏概率。通过一个示例，验证了随机场与旋转破坏机制相结合的可行性。通过几个实际工程案例，验证了概率分析结果的合理性。采用蒙特卡洛法进行参数敏感性分析，研究各因素对空间可变土壤中开挖失败概率的影响。结果表明，所提出的空间可变土体中开挖的破坏机理为工程实践提供了合理的破坏概率计算结果。

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.