Stability Analysis of Soil and Rock Mixed Slope Based on Random Heterogeneous Structure

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-02-19 DOI:10.1155/2024/1448371

Yafei Wang, Zhanrong Zhang, Xingpei Kang, Hao Xie, Chenchen Wang, Kun Liu

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Abstract

Due to the complexity in the heterogeneous internal structure and interactions between rocks and soil, the slide of soil–rock mixed slope is usually more complex than that of a homogeneous soil slope. This paper investigated the stability of soil–rock mixed slopes with finite element method (FEM) based on random heterogeneous structure. An image-aided approach was used to generate the 2-D and 3-D digital rocks to ensure the morphology of digital rocks was similar with the real rocks. The 2-D and 3-D soil–rock mixed slopes were then generated by placing the digital rocks into the soil matrix. The generated heterogeneous structures of soil–rock mixed slope were imported into ABAQUS for numerical analysis. The effect of rock content, spatial distributions, material properties, and rock–soil interface on the stability of soil–rock mixed slopes were analyzed. Results show that the stability factor of the soil–rock mixed slope increases with the increase of rock content. The rocks can play a certain degree of antislide effect in the slope. The uneven spatial distribution of rocks has effect on the overall stability of soil–rock mixed slope. This effect is more significant when the rock content is moderate. Rocks distributed in the middle layer of the slope may improve the overall antisliding performance of the slope. The stability factor decreases with the increase of rock density. While the effect of rock elastic modulus on stability of soil–rock mixed slope is relatively limited. The contact condition at the soil–rock interface has effect on the overall stability of soil–rock mixed slope. It is recommended to properly determine the interface properties for stability analysis of soil–rock mixed slope.

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基于随机异质结构的土石混合斜坡稳定性分析

由于土石混合边坡内部异质结构的复杂性以及岩土之间的相互作用，土石混合边坡的滑动通常比均质土质边坡的滑动更为复杂。本文采用基于随机异质结构的有限元法（FEM）研究了土石混合边坡的稳定性。采用图像辅助方法生成二维和三维数字岩石，以确保数字岩石的形态与真实岩石相似。然后，将数字岩石置于土壤基质中，生成二维和三维土石混合斜坡。生成的土石混合坡异质结构被导入 ABAQUS 进行数值分析。分析了岩石含量、空间分布、材料属性和岩土界面对土石混合边坡稳定性的影响。结果表明，土石混合边坡的稳定系数随岩石含量的增加而增大。岩石在边坡中能起到一定的抗滑作用。岩石的不均匀空间分布会对土石混合边坡的整体稳定性产生影响。当岩石含量适中时，这种影响更为明显。分布在边坡中层的岩石可以改善边坡的整体抗滑性能。稳定系数随岩石密度的增加而降低。岩石弹性模量对土石混合边坡稳定性的影响相对有限。土岩界面的接触条件对土岩混合边坡的整体稳定性有影响。建议在进行土石混合边坡稳定性分析时正确确定界面特性。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.