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.
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.