Freeze-thaw migration behavior of scree deposits in the cold regions: Insight from physical model test

IF 6.9 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-03-09 DOI:10.1016/j.enggeo.2025.108018

Weibo Li , Qinglu Deng , Pengju An , Zhiyao Zhou , Kun Fang

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引用次数: 0

Abstract

In cold regions, the migration of soil and rock particles during freeze-thaw cycles results in uniquely patterned ground. Migration mechanisms of rock particles with inverse grading in talus are still unclear in scree deposits. Here, we designed a physical model test using a camera, a displacement meter, and a thermometer to investigate the migration behavior and related migration mechanisms of scree deposits by freeze-thaw cycles. The results show that the downward displacement of small particles was 16 to 26 times greater than that of large particles, causing small particles to aggregate downward and large particles to be exposed at the surface, thereby exhibiting the phenomenon of inverse grading. The freeze-thaw cycles process causes particles to move and rotate, which leads to smaller particles migrating along the widening gaps between larger particles. Finally, the mechanism of “freeze-thaw microseismicity” in talus is proposed to explain the migration process of scree deposits through freeze-thaw cycles in cold regions.

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寒冷地区岩屑沉积的冻融迁移行为：物理模型试验的启示

在寒冷地区，在冻融循环过程中，土壤和岩石颗粒的迁移导致了独特的地面图案。碎石矿床中距石中逆级配岩石颗粒的运移机制尚不清楚。在此，我们设计了一个物理模型试验，使用相机、位移计和温度计来研究冻融循环对碎石沉积物的迁移行为和相关迁移机制。结果表明：小颗粒的向下位移是大颗粒的16 ~ 26倍，导致小颗粒向下聚集，大颗粒暴露在地表，呈现出逆级配现象。冻融循环过程导致颗粒移动和旋转，这导致小颗粒沿着大颗粒之间扩大的间隙迁移。最后，提出了“冻融微震活动性”机制来解释寒区冻融循环中碎石沉积物的迁移过程。

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

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.