Multi-scale Investigation on the Stability of Soil-Gravel Mixture Slopes Using Imaging Analyses

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-04-27 DOI:10.1144/qjegh2022-119
Yeong-Wei Lu, Yang Hu
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Abstract

Gravel soil slopes were not only prevalent in nature but also widely used in engineering. Understanding the damage characteristics of gravel soil slopes and preventing slope hazards required a thorough investigation of the stability and deformation of gravel soil slopes. In this study, the stability and macroscopic deformation of slopes with varying gravel content (GC) were examined using lab tests and digital image correlation (DIC) techniques, and the rock-winding motion on the shear zone was investigated in detail by capturing the relative motion of soil particles and gravels from a micro-view perspective. In addition, the effects of loading location and slope angle were considered. The results indicated that there are two thresholds of 20% and 70% for the effect of GC on slope ultimate bearing capacity. Gravel soil slope shear damage was primarily caused by the gravel rotation at critical locations. There were at least five rock-inclusive movement patterns in the shear zone, and the primary cause of irregular damage on gravelly soil slopes was the difference in the relative movement of soil particles and gravels. High GC slopes were less sensitive to changes in LL and SA than slopes with low GC.
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影像分析在土-砾石混合料边坡稳定性多尺度研究中的应用
砾石土边坡不仅在自然界中普遍存在,而且在工程中得到了广泛的应用。了解砾石土边坡的破坏特征和预防边坡危害需要对砾石土边坡稳定性和变形进行彻底调查。在本研究中,使用实验室试验和数字图像相关(DIC)技术对不同砾石含量(GC)的边坡的稳定性和宏观变形进行了检测,并通过从微观角度捕捉土壤颗粒和砾石的相对运动,详细研究了岩石在剪切带上的缠绕运动。此外,还考虑了荷载位置和边坡角度的影响。结果表明,GC对边坡极限承载力的影响有20%和70%两个阈值。砾石土边坡剪切破坏主要是由关键位置的砾石旋转引起的。剪切带中至少有五种含岩运动模式,砾石土边坡不规则破坏的主要原因是土壤颗粒和砾石相对运动的差异。GC高的斜坡对LL和SA变化的敏感性低于GC低的斜坡。
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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