风化作用对智利花岗岩岩土力学性质变化的影响

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-09-08 DOI:10.1144/qjegh2023-022
Nicol E. Flandes, Felipe A. Villalobos, Robert King
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引用次数: 0

摘要

岩石风化对岩土参数的影响可以在岩土工程设计中变得重要。风化程度WD通常分为五个级别,从新鲜岩石到完全风化岩石。在本研究中,采用上述五个WD来分析几种常用岩土特性的变化。为此,对处于不同风化阶段的智利花岗岩进行了一系列实验室测试。通过对每个岩土参数进行归一化来分析测试结果,该参数是针对轻度风化样品而不是通常采用的新鲜岩石样品获得的值。通过这种方式,发现无侧限抗压强度UCS的结果随着每个WD而稳定且显著地降低,这已经在以前报道过了。相反,变形模量和P波速度倾向于稳定高度和完全风化岩石样品的降低率,这与其他作者发现的趋势和更高的降低率不一致。对于压实密度、摩擦角和泊松比,也发现了WD的这种稳定降低率。
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The effect of weathering on the variation of geotechnical properties of a granitic rock from Chile
The effect of rock weathering on geotechnical parameters can become substantial in geotechnical design. The weathering degree WD has been normally divided in five levels from fresh rock to completely weathered rock. In this study, the above five WDs are adopted to analyse the variation of several regularly used geotechnical properties. To that aim, a series of laboratory tests to a Chilean granitic rock in different stages of weathering was carried out. The results of the tests have been analysed by normalising each geotechnical parameter respect to the value obtained for slightly weathered samples instead of the fresh rock samples, which is usually adopted. In this way, it was found that the results of unconfined compressive strength UCS reduces steadily and considerably with each WD, which has been previously reported. Conversely, the modulus of deformation and P-wave velocity tend to stabilise the rate of reduction for highly and completely weathered rock samples, which does not agree with the trend and higher rate reductions found by other authors. This stabilisation reduction rate with WD was also found for compaction density, friction angle and Poisson's ratio.
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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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