Application of the random material point method to 3D slope failures.

IF 5.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-01-01 Epub Date: 2025-03-20 DOI:10.1007/s11440-025-02542-w

Guido Remmerswaal, Philip J Vardon, Michael A Hicks

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引用次数: 0

Abstract

Three-dimensional and spatial variability effects on slope failure processes are investigated for an idealised slope stability problem with the random material point method (RMPM). A 45 degree slope is brought to failure by either its own weight or by a combination of its own weight and an additional surface load applied at the crest. The ultimate failure load and potential failure processes are studied for various (heterogeneous) material strength profiles. In 3D, failures tend to spread sideways and backwards. For the slope geometry considered, the resistance to initial and secondary failures in 3D simulations tends to be higher than in 2D simulations, probably due to the additional resistance from the ends of the failure surfaces. The failure behaviour changes when a depth trend in the material strength is introduced. A depth trend in the material strength triggers a flow-like failure process, instead of distinct (approximately) circular failure surfaces which are encountered in a material without a depth trend. The flow-like behaviour causes an expansion in the failure zone in all directions while avoiding (where possible) local strong zones.

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随机质点法在三维边坡破坏中的应用。

利用随机物质点法研究了理想边坡稳定性问题的三维和空间变异性对边坡破坏过程的影响。一个45度的斜坡是由于其自身的重量或其自身重量和附加在顶部的表面载荷的组合而导致破坏的。研究了不同（非均质）材料强度剖面的极限破坏载荷和潜在破坏过程。在3D中，失败倾向于向两侧和后方扩散。考虑到边坡的几何形状，三维模拟中初始和二次破坏的阻力往往高于二维模拟，这可能是由于来自破坏面末端的额外阻力。当引入材料强度的深度趋势时，破坏行为发生变化。材料强度的深度趋势触发了类似流动的破坏过程，而不是在没有深度趋势的材料中遇到的明显的（近似）圆形破坏面。类似流动的行为导致破坏区向各个方向扩展，同时避免（在可能的情况下）局部强区。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.