Study on failure behavior and mode of soil-rock mixture slopes upon SPH numerical simulation

IF 2.9 3区工程技术

Granular Matter Pub Date : 2025-08-30 DOI:10.1007/s10035-025-01571-2

Gang Zhong, Xiaoqiang Zhang, Xiong Song, Jingqi Cui, Zhenrui Zhang

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引用次数: 0

Abstract

In order to accurately and efficiently predict the landslide hazard and post-failure behavior of soil-rock mixtures (SRM), this study adopts the smoothed particle hydrodynamics (SPH) method. Rocks with arbitrary shapes are generated by employing the Monte Carlo random sampling principle. Subsequently, a lattice-based particle generator is proposed to interpret the geometrical model of SRM slopes and to construct the SPH numerical model. Furthermore, this study examines the effects of varying rock contents, sizes and shapes on the failure characteristics of SRM slopes. The findings reveal that the shear zone exhibits non-circular form during SRM slopes failure, presenting four distinct plastic expansion modes: Bypass, diversion, penetration, and inclusion. For identical rock content, an increase in large-sized rocks enhances the interlocking effect, thereby improving SRM slope stability. Conversely, the roundness of rocks significantly affects their failure behavior within SRM slopes, with higher roundness contributing to easier instability. The results demonstrate that the SPH method provides an innovative approach for investigating the failure behavior of heterogeneous materials, such as geotechnical bodies. Moreover, this method exhibits substantial potential for broader applications across various geotechnical engineering domains.

Graphical Abstract

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基于SPH数值模拟的土石混合体边坡破坏行为及破坏模式研究

为了准确有效地预测土石混合体（SRM）的滑坡危险性和破坏后行为，本研究采用光滑颗粒水动力学（SPH）方法。采用蒙特卡罗随机抽样原理，生成了任意形状的岩石。在此基础上，提出了一种基于网格的粒子发生器来解释SRM斜坡的几何模型，并建立了SPH数值模型。此外，本研究还探讨了不同岩石含量、大小和形状对SRM边坡破坏特征的影响。研究结果表明，在SRM边坡破坏过程中，剪切带呈非圆形形态，呈现出四种不同的塑性扩展模式：旁通、导流、渗透和包裹。在岩石含量相同的情况下，大尺寸岩石的增加增强了联锁效应，从而提高了SRM边坡的稳定性。相反，岩石的圆度显著影响其在SRM边坡内的破坏行为，圆度越大，越容易失稳。结果表明，SPH方法为研究土工体等非均质材料的破坏行为提供了一种创新的方法。此外，该方法在各种岩土工程领域显示出广泛应用的巨大潜力。图形抽象

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

Granular Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-MECHANICS

CiteScore

4.30

自引率

8.30%

发文量

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.